Sonali Bank and BDBL — Senior Officer (IT) — Exam: 25.09.2021 (AUST) | প্রশ্ন ও সমাধান

Question 1Operating Systems

A job which is scheduled to run periodically at fixed times or intervals is known as-

a)Batch Job
b)Cron job (correct answer)
c)Shell Script
d)None of the above

Answer and explanation

Correct answer: (b) Cron job

On UNIX/Linux the cron daemon runs commands at fixed times or repeating intervals. Each line of a crontab gives five time fields (minute, hour, day of month, month, day of week) followed by the command, for example 0 2 * * * /backup.sh runs a backup every day at 02:00. A job scheduled this way is called a cron job.

Why the other options are wrong

(a) Batch Job: a batch job runs without user interaction, often in a queue, but it is not defined by a periodic schedule.
(c) Shell Script: a file of shell commands; a cron job may run one, but the script itself has no schedule.
(d) None of the above: wrong because (b) fits exactly.

Tip: Periodic, time-based job on UNIX/Linux → cron (Windows: Task Scheduler).

Source: crontab - POSIX.1-2024 (The Open Group)

Question 2Cyber Security

Between a client and a web server, which of the following is used for inspecting the data that is sent from the client to the web server and blocking attacks such as SQL injection?

a)Cluster configuration
b)Load balancing function
c)SSL-VPN function
d)WAF

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 3Networking

On a class B network, how many hosts are available at each site with subnet mask of 248?

a)16,382
b)8,190
c)4,094
d)2,046

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 4Networking

Which one of the following is false with respect to 4G and 5G cellular networks?

a)5G supports faster bandwidth compared to 4G.
b)Latency in 4G networks is much higher than 5G network.
c)4G uses a narrow slice of the available spectrum from 600 MHz to 2.5 GHz
d)There will be data session handoff feature in 5G network which is not available in 4G network

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 5Networking

What is the propagation time for a 2.5-kbyte message (an e-mail) if the bandwidth of the network is 1 Gbps? Assume that the distance between the sender and the receiver is 12,000 km and that light travels at 2.4 × 10⁸ m/s.

a)50 ms
b)0.020 ms
c)100 ms
d)0.040 ms

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 6Cyber Security

User passwords in Linux are stored as-

a)Direct text data
b)Encrypted using some sort of hashing function (correct answer)
c)Encrypted using mono-alphabetic cipher
d)Encrypted using homophonic substitution cipher

Answer and explanation

Correct answer: (b) Encrypted using some sort of hashing function

Linux keeps user passwords in /etc/shadow, a file that must not be readable by ordinary users. The password field does not hold the password itself but a string produced by the crypt(3) function: a salted, one-way hash. At login the typed password is hashed with the same salt and compared with the stored value; the original password cannot be recovered from the hash.

Why the other options are wrong

(a) Direct text data: storing plain-text passwords would expose every account to anyone who reads the file; Linux never does this.
(c) Encrypted using mono-alphabetic cipher: a classical substitution cipher is reversible and broken by simple letter-frequency analysis.
(d) Encrypted using homophonic substitution cipher: also a reversible classical cipher; anyone who learns the key recovers every password.

Tip: Passwords are hashed (one-way, with a salt), not encrypted (two-way).

Exam note: Strictly, hashing is not encryption; the option's wording follows the old Unix habit of calling the stored hash an "encrypted password" (the shadow(5) manual still names the field that way). Choose (b) because it is the only option that says "hashing".

Source: shadow(5) - Linux manual page; Password Storage - OWASP Cheat Sheet Series

Question 7Database

In Oracle DBMS, LGWR process is a-

a)Foreground Process
b)Background Process (correct answer)
c)High Priority Process
d)Batch Process

Answer and explanation

Correct answer: (b) Background Process

An Oracle instance runs a set of background processes that start with the instance and do maintenance work for all users, rather than for one session. LGWR (Log Writer) is one of the mandatory background processes: it writes redo entries from the redo log buffer in the SGA to the online redo log files. Others in the same group include DBWn (database writer), CKPT (checkpoint), SMON (system monitor) and PMON (process monitor).

Why the other options are wrong

(a) Foreground Process: Foreground (server) processes are created to run the SQL of a particular client session. LGWR serves the whole instance and is not tied to any session.
(c) High Priority Process: This is not a process class in Oracle's architecture. Scheduling priority is an operating-system attribute; by role, the documentation classifies LGWR as a background process.
(d) Batch Process: Batch jobs are user-submitted work that runs and finishes. LGWR runs for as long as the instance is up.

Tip: Three-to-four-letter Oracle process names (LGWR, DBWn, CKPT, SMON, PMON, ARCn) → background processes.

Source: Process Architecture - Oracle Database Concepts 19c

Question 8Networking

The _____ is an HFC network device installed inside the distribution hub that receives data from the internet and passes them to the combiner.

a)CM
b)CMTS
c)DOCSIS
d)MCNS

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 9Database

Finding useful patterns from the data in a database is known as-

a)Data Visualization
b)Data Mining
c)Data Analytics
d)All of the above

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 10General ICT

__________ helps prevent power surges.

a)Surge suppressor
b)Surge protector
c)UPS system
d)High-grade multi-meter

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 11General ICT

What is the API level of Android version 11?

a)24
b)25
c)31
d)None of the above (correct answer)

Answer and explanation

Correct answer: (d) None of the above

Android 11 corresponds to API level 30. Every Android release has a matching API level that apps target, and Google's official platform release notes pair Android 11 with API 30. Since 30 is not printed among the options, the only correct choice is "None of the above".

Why the other options are wrong

(a) 24: API 24 is Android 7.0 (Nougat).
(b) 25: API 25 is Android 7.1.
(c) 31: API 31 is Android 12, one step after Android 11. This is the classic off-by-one trap.

Tip: Android 11 → API 30 and Android 12 → API 31. The API number is never the same as the version number, so don't pick an option just because it "looks close".

Source: SDK Platform release notes | Android Developers

Question 12Software Engineering

.NET can be used in the following-

a)Development of Desktop Applications
b)Development of Microservices and containers
c)Development of Cloud Applications
d)All of the above statements are true (correct answer)

Answer and explanation

Correct answer: (d) All of the above statements are true

.NET is Microsoft's free, open-source, cross-platform developer platform. On top of the same runtime and base libraries it offers several app models, and each option in the question is one of them. As of October 2026 the official .NET site (https://dotnet.microsoft.com/en-us/learn/dotnet/what-is-dotnet) lists, among others:

Desktop apps: native Windows and macOS applications (for example with Windows Forms, WPF or .NET MAUI).
Microservices and containers: independently deployable services packaged in Docker containers (typically with ASP.NET Core).
Cloud apps: apps that consume or provide cloud services and are deployed to cloud platforms.

Why the other options are wrong

(a) Development of Desktop Applications: true, but it is only one of the supported uses.
(b) Development of Microservices and containers: true, but again only one of the supported uses.
(c) Development of Cloud Applications: true as well, so choosing it alone leaves out the other correct statements.

Tip: When every listed use is a genuine .NET workload (desktop, web, mobile, cloud, microservices, games, IoT), choose "All of the above".

Source: What is .NET? An open-source developer platform

Question 13General ICT

What is the Internal Codename of Android version 8.0?

a)Red Velvet Cake
b)Oatmeal Cookie
c)Snow Cone
d)Jelly Bean

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 14Cyber Security

Which of the following statements is false with respect to SSL?

a)Secure Sockets Layer (SSL) is a security protocol that provides privacy, authentication, and integrity to Internet communications
b)SSL evolved into Transport Layer Security (TLS)
c)SSL's final version was SSL 4.0
d)None of the above statements is false

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 15General ICT

A circuit has two different voltage sources that are connected in a series-opposing form. If the sources are rated at 6V and 9V, what is the total source voltage?

a)3 V
b)16 V
c)7.5 V
d)8 V

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 16Computer Architecture

What is the typical speed of USB version 3.0?

a)4.8G bits per second
b)610 Mbps
c)6Gbps
d)Both a and b

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 17Programming

The Java Virtual Machine-

a)Acts as a full-fledged hypervisor
b)Converts bytecodes to Operating System dependent code
c)Is known as the Compiler of Java programming language
d)Manages system memory and provides a portable execution environment for Java-based applications

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 18Networking

In which type of circuit switching is delivery of data delayed because data must be stored in and retrieved from RAM?

a)Space-division
b)Time-division
c)Virtual
d)Packet

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 19Web Technology

Which one of the following statements with respect to REST API is false?

a)A REST API would use a GET request to retrieve a record
b)A REST API would use a DELETE request to delete a record
c)The operations in a REST API can be called from any HTTP client
d)None of the above statements is false

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 20Networking

What is the maximum data rate of a channel with a bandwidth of 200 kHz if we use four levels of digital signaling?

a)400 Kbps
b)800 Kbps
c)1000 Kbps
d)1200 Kbps

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 21Computer Architecture

SSDs are more durable than HDDs in extreme and harsh environments because

a)They don't have actuator arms
b)They use fast electronics Memory
c)They do not use 0/1 as data storage unit which is prone to crash
d)All of the above statements are true

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 22Database

Which one of the following statements is false?

a)Data mining is considered as a process of extracting data from large data sets
b)Data warehouse is the process of pooling all the relevant data together.
c)Data warehouse is created with the data generated by data mining for future use.
d)None of the above statements is false

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 23Database

Which one of the following is a NoSQL database?

a)MongoDB
b)CasperDB
c)ZBase
d)All of the above

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 24Networking

If the end office receives two bursts of analog signals with frequencies of 697 and 1477 Hz, then the number ___ has been punched.

a)1
b)2
c)3
d)4

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 25Database

What will be the output of the following SQL "Select Round (232.420, -2) AS Round Value"?

a)240
b)200
c)233
d)Syntax error

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 26Operating Systems

Which one of the following statements is true with respect to Printer Daemon process?

a)The printer daemon of Operating System runs in kernel mode.
b)Jobs in the printer daemon queue cannot be removed once inserted.
c)Printer daemon application runs only when it is printing.
d)Printer daemon runs as a service in Operating System

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 27General Knowledge

When a beam of light travels through media of two different densities, if the angle of incidence is greater than the critical angle, ___ occurs.

a)Refraction
b)Reflection
c)Incidence
d)Criticism

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 28Cyber Security

In the ___ protocol, the symmetric key is K = Gˣʸ mod N, where G and N are public numbers.

a)Needham-Schroeder
b)Otway-Rees
c)Diffie-Hellman
d)Kerberos

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 29Computer Architecture

Which of the following statements is false?

a)64-bit processor is more capable than a 32-bit processor because it can handle more data at once
b)A Computer works with Hexa-Decimal number system
c)A 32-bit system can access 2³² memory addresses
d)None of the above statements is false

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 30Computer Architecture

Which one of the following statements is true?

a)Cache memory is a small amount of memory which is a part of the Random-Access memory
b)Cache memory is used to temporarily hold instructions and data that the CPU is likely to reuse
c)Cache Memory is cheaper memory
d)All of the above statements are true

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 31Networking

Which error detection method involves the use of parity bits?

a)Simple parity check
b)Two-dimensional parity check
c)CRC
d)a and b

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 32Networking

A DNS response is classified as ___ if the information comes from a cache memory.

a)Authoritative
b)Recursive
c)Unauthoritative
d)Iterative

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 33Networking

An email contains a textual birthday greeting, a picture of a cake, and a song. The order is not important. What is the Content-type?

a)Multipart/digest
b)Multipart/alternative
c)Multipart/mixed
d)Multipart/parallel

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 34Database

Which one of the following statements is true with respect to a Database Management System?

a)Super key and candidate keys are similar
b)Candidate keys and Unique Keys are similar
c)Unique Keys and Primary Keys are similar
d)Candidate keys and Primary keys are similar

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 35Networking

________ is a client-server program that provides an IP address, subnet mask, IP address of a router, and IP address of a name server to a computer.

a)NAT
b)DHCP
c)CIDR
d)ISP

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 36Algorithms

The Average-case Time Complexity of the binary search algorithm is-

a)O(n/2 log n)
b)O(n log n)
c)O(log n) (correct answer)
d)O(1)

Answer and explanation

Correct answer: (c) O(log n)

Each comparison in binary search halves the remaining range, so a sorted array of n elements needs at most ⌊log₂ n⌋ + 1 comparisons. For the average successful search, half of the elements sit at the deepest level of the search and need the maximum number of comparisons, so the average is only about one less than the maximum:

n = 1,023: average ≈ 9.01 comparisons, maximum 10
n = 1,000,000: average ≈ 18.95 comparisons, maximum 20

Average ≈ log₂ n − 1, which is O(log n).

Why the other options are wrong

(a) O(n/2 log n): grows even faster than linear search's O(n); no search needs that much work.
(b) O(n log n): that is the cost of efficient sorting (e.g. merge sort), not of one search.
(d) O(1): only the best case, when the key is found at the middle on the first comparison.

Tip: Binary search — best O(1), average and worst O(log n).

Source: binary search — NIST Dictionary of Algorithms and Data Structures

Question 37Networking

________ is a standard to allow telephones on the public telephone network to talk to computers connected to the Internet.

a)SIP
b)H.323
c)IEEE 802.3
d)V.90bis

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 38Networking

An Ethernet LAN using the OSPF protocol with five attached routers can be called a _______ network.

a)Point-to-point
b)Stub
c)Transient
d)Virtual

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 39Computer Architecture

The term LPDDR means-

a)Low-Power Discrete Data Rate
b)Low-processing Double Data Rate
c)Low-Programmable Double Data Rate
d)None of the above (correct answer)

Answer and explanation

Correct answer: (d) None of the above

LPDDR stands for Low-Power Double Data Rate. It is JEDEC's family of SDRAM standards for mobile and battery-powered devices (for example LPDDR4 and LPDDR5/5X). "Double Data Rate" means data is transferred on both the rising and the falling clock edge. None of options (a)–(c) gives this expansion, so "None of the above" is correct.

Why the other options are wrong

(a) Low-Power Discrete Data Rate: the second "D" is "Double", not "Discrete".
(b) Low-processing Double Data Rate: "LP" means Low-Power; memory chips do not process data.
(c) Low-Programmable Double Data Rate: "P" stands for Power, not Programmable.

Tip: DDR = Double Data Rate; LPDDR = Low-Power DDR for phones, tablets and thin laptops.

Source: LOW POWER DOUBLE DATA RATE (LPDDR) 5/5X — JEDEC

Question 40Networking

What is the maximum data rate in IEEE 802.11n?

a)300 Mbps
b)600 Mbps
c)1 Gbps
d)832 Mbps

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 41Networking

An IPv6 basic header is fixed as-

a)32 bytes long
b)40 bytes long (correct answer)
c)64 bits long
d)128-bit long

Answer and explanation

Correct answer: (b) 40 bytes long

The IPv6 base header always has the same eight fields: Version (4 bits), Traffic Class (8), Flow Label (20), Payload Length (16), Next Header (8), Hop Limit (8), Source Address (128) and Destination Address (128).

Total = 4 + 8 + 20 + 16 + 8 + 8 + 128 + 128 = 320 bits
320 bits ÷ 8 = 40 bytes

Options are not carried inside this header; they go in separate extension headers chained by the Next Header field, so the base header never changes size. IPv4's header, by contrast, is 20 bytes minimum and up to 60 bytes with options.

Why the other options are wrong

(a) 32 bytes long: The two 16-byte addresses alone already take 32 bytes; the other six fields add 8 more.
(c) 64 bits long: 64 bits is just 8 bytes, which is the size of the non-address fields only.
(d) 128-bit long: 128 bits is the size of one IPv6 address, not of the whole header.

Tip: IPv6 header = 40 bytes fixed; IPv4 header = 20 to 60 bytes.

Source: Implementing Network Stack IPv4 and IPv6 - Cisco IOS XR Configuration Guide
Source: RFC 8200: Internet Protocol, Version 6 (IPv6) Specification

Question 42Algorithms

The binary search algorithm is used to search for a given item when items are sorted. If the number of items is 1 million, which of the following is the closest to the maximum number of comparisons required to find the item?

a)15
b)20
c)25
d)30

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 43Database

What is the min and max number of tables required to convert an ER diagram with 2 entities and 1 relationship between them with partial participation constraints of both entities?

a)Min 1 and max 2
b)Min 1 and max 3
c)Min 2 and max 3
d)Min 2 and max 2

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 44Mathematics

At any iteration of simplex method, if Δj (Zj – Cj) corresponding to any non-basic variable Xj is obtained as zero, the solution under the test is-

a)Degenerate solution
b)Unbounded solution
c)Alternative solution
d)Optimal solution

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 45Cloud & Emerging Tech

Which of the following neural networks uses supervised learning?

a)Multilayer perceptron
b)Self-organizing feature map
c)Hopfield network
d)a and c

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 46Networking

Which of the following services uses both TCP and UDP ports?

a)DNS
b)TFTP
c)SSH
d)TELNET

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 47Operating Systems

Which of the following Linux command has incorrect syntax?

a)cat sample.txt | grep -v a | sort -r
b)chown :group3 File1
c)chmod a+rx viewer.sh
d)None of the above

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 48Software Engineering

In software development, value adjustment factors include the following among others:

a)the criticality of the performance and reusability of the code
b)number of lines of code in the software.
c)number of technical manpower and hardware costs
d)time period available and the level of user friendliness

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 49Operating Systems

What is the maximum size of a file allowed in Linux with the following data: Block Size = 4KB, inode data pointer size = 4 bytes?

a)1 TB
b)Less than 4TB
c)2TB+2GB+2MB+64KB
d)More than 4 TB

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 50Computer Architecture

In a two-level memory hierarchy, the access time of the memory is 12 nanoseconds, and the access time of the main memory is 1.5 microseconds. The hit ratio is 0.98. What is the average access time of the two-level memory system?

a)13.5 nsec
b)42 nsec
c)7.56 nsec
d)76 nsec

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 51Networking

A single switch port is considered as-

a)A separate unicast domain
b)A separate broadcast domain
c)A separate multicast domain
d)A separate collision domain

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 52Operating Systems

Which UNIX/Linux command is used to make all files and sub-directories in the directory "progs" executable by all users?

a)chmod -R a+x progs
b)chmod -R 222 progs
c)chmod -X a+x progs
d)chmod -X 222 progs

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 53Networking

An Access point operates in which layer of OSI model?

a)Data link Layer
b)Presentation layer
c)Physical layer
d)Transport layer

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 54Operating Systems

Which of the following Process scheduling algorithm is highly improbable to be implemented?

a)FCFS Scheduling
b)Priority Scheduling
c)Shortest Job First Scheduling
d)None of the above

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 55Microprocessor

Consider the following program fragment in assembly language:

mov ax, 0h
mov cx, 0Ah
doloop:
dec ax
loop doloop

What is the value of ax and cx registers after the completion of the do loop?

a)ax=FFF5 h and cx=0h
b)ax=FFF6 h and cx=0h
c)ax=FFF7 h and cx=A h
d)ax=FFF5 h and cx=0A h

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 56Computer Architecture

How many core/threads does the Intel Core i7-9700K processor have?

a)6/12
b)4/8
c)8/8
d)8/16

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 57Software Engineering

Assuming the existence of start and end nodes for a program graph (PG), the total number of Paths is equivalent to ___ set of test data required to test software.

a)Minimum
b)Maximum
c)Optimum
d)Supreme

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 58General ICT

In which year were chips used inside the computer for the first time?

a)1964
b)1974
c)1975
d)1981

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 59Cyber Security

Which one of the following is false with respect to cryptography?

a)A symmetric key system uses only the private key
b)An asymmetric key system makes use of both the public key and the private key
c)An Asymmetric key system is used as a Public Key Infrastructure, or PKI for short
d)None of the above statements is false

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 60General Knowledge

সাম্যবাদ কোন ইউরোপীয় দেশেপ্রথম সূত্রপাত হয়?

a)ইতালি
b)ইংল্যান্ড
c)ফ্রান্স
d)রাশিয়া

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 61General Knowledge

ধরিত্রী সম্মেলন কোথায় অনুষ্ঠিত হয়?

a)আফ্রিকার জোহানেসবার্গ
b)ব্রাজিলের রিওডিজেনিরোতে
c)ইতালির রোমে
d)যুক্তরাষ্ট্রের ওয়াশিংটন ডিসিতে

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 62General ICT

আইওএস (iOS) মোবাইল অপারেটিং সিস্টেমটি কোন প্রতিষ্ঠান বাজারজাত করে?

a)অ্যাপল
b)গুগল
c)মাইক্রোসফট
d)আইবিএম

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 63Mathematics

The product of two positive numbers is p. If each of the numbers is increased by 2, the new product is how much greater than twice the sum of the two original numbers?

a)p times
b)2p times
c)(p+4) times
d)(2p+3) times

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 64Mathematics

A jar contains white, red and green marbles in the ratios 2:3:5 Six more green marbles are added to the jars, and then the ratio becomes 2:3:7. How many white marbles are there in the jar?

a)2
b)4
c)6
d)8

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 65Mathematics

If a, b and c are 3 consecutive integers and a>b>c, which of the following has the maximum value?

a)c + b/a
b)a + b/c
c)b+ c/a
d)c + a/b

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 66Mathematics

One dozen eggs and ten pounds of apples are currently of the same price. If the price of a dozen eggs rises by 10% and that of apples rises by 2% how much more will it cost to buy a dozen of eggs and ten pounds of apples?

a)2%
b)10%
c)6%
d)12%

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 67Bangla

'ব্যক্ত' শব্দের বিপরীতার্থক শব্দ কোনটি?

a)ত্যক্ত
b)গ্রাহ্য
c)দৃঢ়
d)গূঢ়

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 68Bangla

মুক্তিযুদ্ধের পটভূমিতে রচিত কাব্যগ্রন্থ কোনটি?

a)নেকড়ে অরণ্য
b)বন্দী শিবির থেকে
c)নিষিদ্ধ লোবান
d)প্রিয়যোদ্ধা প্রিয়তম

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 69Bangla

কাজী নজরুল ইসলামের 'অগ্নি-বীণা' কাব্যের প্রথম কবিতা কোনটি?

a)আগমনী
b)কোরবানী
c)প্রলয়োল্লাস
d)বিদ্রোহী

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 70Bangla

কোনটি রবীন্দ্রনাথ ঠাকুরের কাব্যগ্রন্থ?

a)শেষ লেখা
b)শেষ প্রশ্ন
c)শেষ কথা
d)শেষ দিন

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 71Bangla

মুনীর চৌধুরীর 'মুখরা রমণী বশীকরণ' একটি-

a)উপন্যাস
b)ছোটগল্প
c)প্রবন্ধ
d)অনুবাদ নাটক

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 72Bangla

'বন্ধন' শব্দের সঠিক অক্ষর বিন্যাস কোনটি?

a)ব+নক্ক+ন
b)বন্+ধন্
c)ব+ক্ক+ন
d)বান্+ধন্

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 73Bangla

বহুব্রীহি সমাসবদ্ধ পদ কোনটি?

a)জনশ্রুতি
b)অনমনীয়
c)খাসমহল
d)তপোবন

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 74Bangla

'বিষাদ সিন্ধু' একটি-

a)গবেষণা গ্রন্থ
b)ধর্মবিষয়ক প্রবন্ধ
c)ইতিহাস আশ্রয়ী উপন্যাস
d)আত্মজীবনীপ

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 75Bangla

বাংলা কথ্য ভাষার আদি গ্রন্থ কোনটি?

a)প্রভু যিশুর বাণী
b)কৃপার শাস্ত্রের অর্থভেদ
c)ফুলমণি ও করুণার বিবরণ
d)মিশনারি জীবন

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 76Bangla

উপসর্গ কোনটি?

a)অতি
b)থেকে
c)চেয়ে
d)দ্বারা

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 77English

The warning of the authority falls on deaf ears. Here warning does the function of-

a)adverb
b)adjective
c)verb
d)noun

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 78English

"A rolling stone gathers no moss" The complex form of the sentence is-

a)Since a stone is rolling, it gathers no moss
b)Though a stone roll, it gathers no moss.
c)A stone what rolls gathers no moss.
d)A stone that rolls gathers no moss.

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 79English

Which word is the determiner in the sentence "Will it take much time?"

a)Will
b)take
c)much
d)time

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 80English

Choose the pair of words that expresses a relationship similar to that of "Harm:Damage"=

a)Sweet:Sour
b)Injure:Incapacitate
c)Stout:Weak
d)Hook:Crook

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 81English

Which is the correct sentence?

a)He insisted on seeing her
b)He insisted for seeing her
c)He insisted in seeing her
d)He insisted to be seeing her

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 82English

If a part of a speech or writing breaks the theme, it is called-

a)pomposity
b)digression
c)exaggeration
d)anti-climax

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 83Mathematics

There are n students in a school. If r % among the students are 12 years or younger, which of the following expressions represents the number of students who are older than 12?

a)n(1-r)
b)100(1-r)
c)n(1-r)/100
d)n(100-r)/100

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 84Mathematics

Length of a train is 170 meters and speed of train is 63 km/hour. This train can pass a bridge in 30 seconds, then find the length of the bridge.

a)355 m
b)325 m
c)365 m
d)312 m

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 85Mathematics

A wholesaler sells goods to a retailer at a profit of 20%. The retailer sells to the customer, who pays 80% more than the cost of the wholesaler. What is the retailer's profit?

a)40%
b)50%
c)60%
d)70%

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 86Mathematics

If x³<x²<x then the value of x could be

a)0
b)1
c)1/3
d)√3

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 87Mathematics

The hypotenuse of a right triangle is 2 centimeters more than the longer side of the triangle. The shorter side of the triangle is 7 centimeters less than the longer side. Find the length of the hypotenuse.

a)13
b)15
c)17
d)19

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 88Mathematics

Equal amounts of water were poured into two empty jars of different capacities, which made one jar ¼ full and the other jar 1/3 full. If the water in the jar with the lesser capacity is then poured into the jar with the greater capacity, what fraction of the larger jar will be filled with water?

a)1/3
b)1/4
c)1/5
d)1/2

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 89General Knowledge

গণপ্রজাতন্ত্রী বাংলাদেশের সংবিধান প্রবর্তিত হয়-

a)১৭ এপ্রিল ১৯৭১
b)১৬ ডিসেম্বর ১৯৭২
c)৭ মার্চ ১৯৭২
d)২৬ মার্চ ১৯৭৩

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 90General Knowledge

বঙ্গবন্ধু আগরতলা ষড়যন্ত্র মামলায় মোট আসামি সংখ্যা ছিল কতজন?

a)৩৪ জন
b)৩৫ জন
c)৩৬ জন
d)৩২ জন

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 91General Knowledge

আইন প্রণয়নের ক্ষমতা-

a)আইন মন্ত্রণালয়ের
b)রাষ্ট্রপতির
c)স্পিকারের
d)জাতীয় সংসদের

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 92General Knowledge

পার্বত্য চট্টগ্রাম শান্তিচুক্তি কত সালে স্বাক্ষরিত হয়?

a)১৯৯৬
b)১৯৯৭
c)১৯৯৯
d)২০০১

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 93General Knowledge

বাংলাদেশের প্রথম স্বাধীন নবাব কে?

a)নবাব সিরাজউদ্দৌলা
b)মুর্শিদ কুলী খান
c)ইলিয়াস শাহ
d)আলাউদ্দিন হুসেন শা

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 94General Knowledge

বায়ুমন্ডলের যে স্তরে বেতার তরঙ্গ প্রতিফলিত হয়-

a)স্ট্রাটোস্ফিয়ার
b)ট্রপোস্ফিয়ার
c)আয়োনোস্ফিয়ার
d)ওজোনস্তর

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 95General Knowledge

'কালাপানি' কোন দুই রাষ্ট্রের মধ্যে অমীমাংসিত ভূখণ্ড?

a)ভারত ও নেপাল
b)পাকিস্তান ও চীন
c)ভুটান ও ভারত
d)বাংলাদেশ ও ভারত

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 96English

Education is enlightening. Here 'enlightening'' is:

a)A gerund
b)A participle
c)An infinitive
d)A finite verb

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 97English

The comparison of unlike things using the words like on as is known to be –

a)metaphor
b)simile
c)alliteration
d)personification

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 98English

In English grammar, ___ deals with formation of sentences.

a)Morphology
b)Etymology
c)Syntax
d)Semantics

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন

Question 99English

Give the antonym of the word 'transitory'.

a)temporary
b)permanent
c)transparent
d)short-lived

Sign up free to see the answer and explanation · উত্তর দেখতে বিনামূল্যে সাইন আপ করুন