Bangladesh Bank — Assistant Maintenance Engineer — Exam: 04.02.2023 (BIBM)প্রশ্ন ও সমাধান
- Set by
- Bangladesh Bank
- Post
- Assistant Maintenance Engineer
- Exam date
- 4 Feb 2023
- Conducted by
- BIBM
- Questions
- 39 (25 MCQ, 14 written)
- Exam guide
- Bank IT jobs · ব্যাংকের আইটি চাকরি
- Cloud & Emerging Tech · ক্লাউড ও উদীয়মান প্রযুক্তি 8
- Networking · নেটওয়ার্কিং 7
- Database · ডেটাবেজ 5
- General Knowledge · সাধারণ জ্ঞান 4
- Mathematics · গণিত 4
- Computer Architecture · কম্পিউটার আর্কিটেকচার 3
- Digital Logic · ডিজিটাল লজিক 2
- Software Engineering · সফটওয়্যার ইঞ্জিনিয়ারিং 2
- Cyber Security · সাইবার নিরাপত্তা 1
- General ICT · সাধারণ আইসিটি 1
- Microprocessor · মাইক্রোপ্রসেসর 1
- Operating Systems · অপারেটিং সিস্টেম 1
Which country is known as the 'Rainbow nation'?
- a)Chaina
- b)South Korea
- c)Japan
- d)South Africa
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Which one of the following is related to the services provided by cloud?
- a)Sourcing
- b)Ownership
- c)Reliability
- d)PaaS
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How many steps are there in the waterfall model?
- a)5
- b)6
- c)7
- d)8
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Which is the third largest economic country?
- a)United States
- b)Japan
- c)Chaina
- d)Kolkata
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Where is data warehousing used?
- a)Transaction System
- b)Logical system
- c)Decision support system (correct answer)
- d)None
Answer and explanation
Correct answer: (c) Decision support system
A data warehouse consolidates historical data from many operational sources into one integrated, read-mostly store designed for query and analysis. Managers and analysts run reports, OLAP and data mining on it to understand trends and make decisions, which is exactly what a decision support system (DSS) does. The warehouse is the data foundation of a DSS / business-intelligence environment.
Why the other options are wrong
- (a) Transaction System: Day-to-day transactions (orders, payments) run on OLTP databases that handle many small inserts and updates and keep current data. A warehouse is deliberately separated from this workload and is loaded in bulk by ETL.
- (b) Logical system: Not a recognised category of information system; it does not describe where a warehouse is used.
- (d) None: Wrong, because (c) is a correct use.
Tip: OLTP runs the business; the data warehouse (OLAP / DSS) helps decide about the business.
Sources: Introduction to Data Warehousing Concepts | Oracle Database 19c Data Warehousing Guide; What is a data warehouse? | IBM
Which of the following is protected by the Copyright Act?
- a)Intellectual property
- b)Original work of authorship
- c)Software
- d)All
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A basic memory storage element in a digital system is:
- a)Flip-flop
- b)Counter
- c)Multiplexer
- d)Encoder
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What is the use of data cleaning?
- a)To remove the noisy data
- b)Transformations to correct the wrong data
- c)Correct the inconsistencies in data
- d)All of the above
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The greatest negative number which can be stored in a computer that has 8-bit word length and use 2's complement arithmetic is _____.
- a)-256
- b)-127
- c)-255
- d)-128
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Who get Balon d'Or cup 2022?
- a)Lionell Messi
- b)Kylian Mbappe
- c)Karim Benzema
- d)Ronaldo
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Small logical units where a data warehouse holds large amounts of data are known as _____.
- a)Access layers
- b)Data marts
- c)Data storage
- d)Data miners
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Which of the following is an essential process in which intelligent methods are applied to extract data patterns?
- a)Warehousing
- b)Data Mining
- c)Text Mining
- d)Data Selection
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Two resistors R1 and R2 are connected in parallel with R1 < R2. Choose all correct answers below. The total resistance of the combination below is: _____.
- a)less than R1
- b)less than R2
- c)greater than R2
- d)greater than 2*R2
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What type of computing technology refers to services and applications that typically run on a distributed network through virtualized resources?
- a)Distributed Computing
- b)Cloud Computing
- c)Soft Computing
- d)Parallel Computing
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Cloud Computing architecture is a combination of_____.
- a)Service-oriented architecture and grid computing
- b)Utility computing and event-driven architecture.
- c)Service-oriented architecture and event-driven architecture. (correct answer)
- d)Virtualization and event-driven architecture.
Answer and explanation
Correct answer: (c) Service-oriented architecture and event-driven architecture
In exam material, cloud computing architecture is described as a combination of two design styles:
- Service-oriented architecture (SOA): applications are built from separate, reusable services that talk to each other over standard interfaces. This is how cloud offerings are packaged and consumed "as a service".
- Event-driven architecture (EDA): event producers emit events, and consumers react to them through event channels. This lets cloud components respond asynchronously and scale on demand.
Why the other options are wrong
- (a) Service-oriented architecture and grid computing: grid computing is a forerunner technology (pooling distributed machines for big jobs), not an architectural style paired with SOA.
- (b) Utility computing and event-driven architecture: utility computing is a billing/business model (pay for what you use), not an architecture.
- (d) Virtualization and event-driven architecture: virtualization is an enabling technology underneath the cloud, not an architectural style.
Exam note: "SOA + EDA" is the conventional exam answer, not a standards definition. NIST's cloud reference architecture is described instead in terms of five actors: consumer, provider, carrier, auditor and broker.
Tip: Cloud architecture = SOA (services) + EDA (events); grid, utility and virtualization are enabling technologies or models.
Source: NIST Cloud Computing Reference Architecture (NIST SP 500-292); What is SOA? - Service-Oriented Architecture Explained - AWS; Event-Driven Architecture Style - Azure Architecture Center | Microsoft Learn
Service that generally focuses on the hardware follows which one of the following service models?
- a)IaaS
- b)PaaS
- c)SaaS
- d)Both A and B
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Which of the following pairs is an example of intra-domain routing protocols?
- a)ALOHA, RIP
- b)OSPF, RIP
- c)RIP, FTP
- d)BGP, SMTP
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Which of the following cannot be used as a public IP address?
- a)17.0.0.1
- b)168.172.19.34
- c)172.15.29.63
- d)192.168.13.18 (correct answer)
Answer and explanation
Correct answer: (d) 192.168.13.18
RFC 1918 sets aside three blocks for private networks. Routes for them are not advertised and packets using them are not forwarded across the Internet, so an address from these blocks cannot be a public address:
- 10.0.0.0 – 10.255.255.255 (10.0.0.0/8)
- 172.16.0.0 – 172.31.255.255 (172.16.0.0/12)
- 192.168.0.0 – 192.168.255.255 (192.168.0.0/16)
192.168.13.18 begins with 192.168, so it lies in 192.168.0.0/16 and is private.
Why the other options are wrong
- (a) 17.0.0.1: The first octet is 17, which is in none of the private blocks (10.x is the only private /8), so it is a public address.
- (b) 168.172.19.34: Starts with 168, not 172 or 192.168; the digits look like a private range but the address is public.
- (c) 172.15.29.63: The private 172 block runs only from 172.16 to 172.31; 172.15 is just outside it, so this is public.
Tip: Private = 10.x.x.x, 172.16–172.31.x.x, 192.168.x.x; watch out for 172.15 and 172.32, which are public.
Which one of the following cloud concepts is related to sharing and pooling the resources?
- a)Virtualization
- b)Polymorphism
- c)Abstraction
- d)None of the above
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Which command loads a new version of the Cisco IOS into a router?
- a)
copy flash ftp - b)
copy ftp flash - c)
copy flash tftp - d)
copy tftp flash
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Which of the following provides the ability to query information from the database and insert tuples into, delete tuples from, and modify tuples in the database?
- a)DML (Data Manipulation Language)
- b)DDL (Data Definition Language)
- c)Query
- d)Relational Schema
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The lead character in the film 'The Bandit Queen' has been played by –
- a)Rupa Ganguly
- b)Seema Biswas
- c)Pratiba Sinha
- d)Shabana Azmi
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A CPU generates 32-bit virtual addresses. The page size is 4 KB. The processor has a translation look-aside buffer (TLB) which can hold a total of 128 page table entries and is 4-way set associative. The minimum size of the TLB tag is:
- a)11 bits
- b)13 bits
- c)15 bits
- d)20 bits
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When a host on network A sends a message to a host on network B, which address does the router look at?
- a)Port
- b)IP
- c)Physical
- d)Subnet mask
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A page fault occurs
- a)When a requested page is in memory
- b)When a requested page is not in memory
- c)When a page is corrupted
- d)When an exception is thrown
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Suppose we have a 16 KB of data in a direct mapped cache with 4 word blocks. Determine the size of the tag, index and offset fields if we are using a 32-bit architecture.
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Explain parity method for error detection. Write down the bit strings of "Delta" using ASCII.
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Suppose that a digitized TV picture is to be transmitted from a source that uses a matrix of 480 times 500 picture elements (pixels), where each pixel can take on one of 32 intensity values. Assume that 30 pictures are sent per second. (This digital source is roughly equivalent to broadcast TV standards that have been adopted.) Find the source rate R (bps).
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One of the drawbacks of a small packet size is that a large function of link bandwidth is consumed by overhead bytes. To this end, supposed that the packet consists of P bytes and 5 bytes of header. Consider sending a digitally encoded voice source directly. Suppose the source is encoded a constant rate of 128 kbps. Assume each packet is entirely filled before the source sends the packet into the network. The time required to fill a packet is the packetization delay. Determine the packetization delay for length L = 1500 bytes (roughly corresponding to maximum-sized Ethernet packet).
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Explain IaaS, PaaS, and SaaS with respect to cloud computing.
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Define a virtual machine with a neat diagram, explain the working of VM. What are the benefits of a VM?
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What are the challenges in optimizing energy efficiency of data centers? Explain!
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A bank has association with two different service providers as their payment gateways. The bank hires Mr. X to audit the payment gateway based on risk and threat detection. Which possible scenarios Mr. X will face?
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Verification and validation are two process areas at CMMI level 3. For both of these areas (a) provide a definition (b) a description of how you can fulfill these areas in your software testing activities.
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Describe cut off, saturation and active region of operation of a transistor with diagram. Explain the working principal of ab n-channel JFET with various values of V꜀ₛ and Vds.
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A father has divided his property between his two sons A and B. A invests the amount at a compound profit of 8% p.a. B invests the amount of 10% p.a. simple profit. At the end of 2 years, the profit received by B is Taka 1336 more than the interest received by A. Find A's share in the fathers property of Taka 25000.
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The percentage profit earned by selling an artical for Tk. 1920 is equal to the percentage loss incurred by selling the same artical for Tk. 1280. At what price should the artical be sold to make 25% profit?
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AD is the longest side of the triangle ABD shown in the figure, what is the length of longest side of △ABC?
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4(√6+√2)/(√6-√2) − (2+√3)/(2-√3) =?
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Question text is from the public recruitment exam; answers and explanations are written by ARBS Academy. All past papers · Bank IT jobs guide