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BCC — Assistant Programmer — Exam: 11.11.2023প্রশ্ন ও সমাধান

Set by
BCC
Post
Assistant Programmer
Exam date
11 Nov 2023
Questions
66 (0 MCQ, 66 written)
Exam guide
Government IT officer posts · সরকারি প্রতিষ্ঠানের আইটি পদ
  • Programming · প্রোগ্রামিং 18
  • Database · ডেটাবেজ 9
  • Networking · নেটওয়ার্কিং 9
  • Cloud & Emerging Tech · ক্লাউড ও উদীয়মান প্রযুক্তি 7
  • Cyber Security · সাইবার নিরাপত্তা 6
  • Web Technology · ওয়েব টেকনোলজি 4
  • Data Structures · ডেটা স্ট্রাকচার 3
  • General Knowledge · সাধারণ জ্ঞান 3
  • Algorithms · অ্যালগরিদম 2
  • English · ইংরেজি 2
  • Mathematics · গণিত 2
  • General ICT · সাধারণ আইসিটি 1
Written question 1Networking

IPv6 is how many bits?

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Written question 2Programming

What are the inbuit classes?

Model answer

Inbuilt (built-in) classes are the ready-made classes provided by a programming language's standard library, available for use simply by importing/including them — the programmer does not need to write their own implementation.

  • They differ from user-defined classes, which a programmer writes to model application-specific data/behaviour.
  • Examples (Java): String, Math, Scanner, ArrayList, HashMap — all part of java.lang/java.util.
  • Examples (Python): str, list, dict, datetime — all built into the language or its standard library.
  • Built-in classes come with predefined (built-in) methods already implemented and tested — e.g., String.length(), Math.sqrt() — which is why built-in classes and predefined methods are closely linked concepts, though not the same thing: a class is the blueprint/type, a method is a single operation defined inside it.
// Using the built-in String and Math classes — no need to define them yourself
String name = "Bangladesh";
System.out.println(name.length());      // built-in method of String class
System.out.println(Math.sqrt(49));       // built-in method of Math class

Exam takeaway: inbuilt/built-in classes = ready-to-use classes from the language's standard library (String, ArrayList, Math, etc.), each bundled with its own predefined methods — saving programmers from reimplementing common functionality.

Written question 3Programming

The statements that allows you to define a block of code to be tested for exceptions while it is being executed.

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Written question 4Networking

An optical fiber has a signal solid dielectric cylinder knowns as the core which is surounded by a solid dielectric ____ is called?

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Written question 5Cloud & Emerging Tech

What s the axon of neural network do?

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Written question 6Networking

In which layer IPsec works?

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Written question 7Programming

What can be used to terminate for(;;)?

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Written question 8Programming

A feature of Object oriented programming languages that allows a specific routine to use variables of different types at different times, is called OOP?

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Written question 9Programming

Which variable violates the principle of ecvapsulation?

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Written question 10Database

What is the degree of relation?

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Written question 11Web Technology

What is the popular way to linking many documents?

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Written question 12Cyber Security

Software downloaded from internet and installed that is malicious is called-

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Written question 13Programming

Which type of members can't accessed in derived classes of a base class?

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Written question 14Programming

What is syntax for call static method in class?

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Written question 15Database

Functional dependency use in which normalizations?

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Written question 16Programming

When a function is called more than one time that is called?

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Written question 17Database

Which level of abstraction specifies the data and relationships between data?

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Written question 18Cloud & Emerging Tech

What is a distributed ledger on a peer-to-peer network called?

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Written question 19Cyber Security

What are hackers who find bugs and vulnerabilities called?

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Written question 20Data Structures

In data structure use recursion?

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Written question 21Database

What is the D in ACID property in database?

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Written question 22Data Structures

What is the prefix conversion of the expression A+(B-C)*D?

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Written question 23Cloud & Emerging Tech

In which way blockchain data can be modifued?

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Written question 24Cloud & Emerging Tech

A distributive ledger in a peer-to-peer network is called?

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Written question 25Programming

Which type of variable violates encapsulation rules?

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Written question 26Cyber Security

What is the function of a firewall?

Model answer

Answer: A firewall is a network security device/software that monitors and filters incoming and outgoing traffic based on a defined set of security rules, blocking unauthorized access while allowing legitimate communication.

  • Packet filtering: inspects headers (source/destination IP, port, protocol) and allows/denies packets against an access-control list (ACL).
  • Stateful inspection: tracks the state of active connections and allows return traffic only for connections it initiated/permitted.
  • Application-layer (proxy) filtering: inspects the actual application data (e.g., HTTP requests) for deeper content-based control.
  • Perimeter defense: sits at the boundary between a trusted internal network and an untrusted external network (e.g., the Internet).
graph LR
    I((Internet - untrusted)) --> F[Firewall]
    F -->|Allowed traffic| R[Router/Switch]
    R --> S[(Internal Servers)]
    R --> W[Workstations]
    F -.->|Blocked traffic| X[Dropped]
Type Works at Example use
Packet-filtering Network layer Blocks traffic from a specific IP/port
Stateful Network + Transport Allows only replies to connections we started
Proxy/Application Application layer Inspects HTTP content, blocks malicious URLs
Next-Gen Firewall (NGFW) All layers Adds intrusion prevention, deep packet inspection

Exam takeaway: a firewall enforces a security policy at the network perimeter — permitting authorized traffic and blocking everything else, based on packet filtering, connection state, or application content.

Written question 27Data Structures

Prefix Conversion A+ B * C+D expression?

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Written question 28General Knowledge

Intelligence can not be measured only by intelligence test because it is related to other subjects. (True or False)

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Written question 29Cloud & Emerging Tech

Machine learning is a subset of cloud computing that can be built AI-Based. (True or False).

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Written question 30Cyber Security

Hacking a system without cracking the system, only for finding bugs and vulgarities is called?

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Written question 31Programming

What is the difference between Null and Void?

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Written question 32Cyber Security

If you downloaded the email, you will be able to face the problem. Which attack do you face?

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Written question 33Programming

What are the built in classes?

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Written question 34Cloud & Emerging Tech

What does the axon of neural network do?

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Written question 35Networking

In which layer IPsec works?

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Written question 36Programming

What can be used to terminate for(;;)?

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Written question 37Database

What is the degree of relation in dbms?

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Written question 38Web Technology

What is the popular way of linking many documents?

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Written question 39General ICT

What is the full form BDCCL?

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Written question 40Cyber Security

Software downloaded from internet and installed that is not malicious is called?

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Written question 41Programming

Which members of base class cannot access to derived class?

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Written question 42Web Technology

Which tag is used to write JavaScript in html?

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Written question 43Web Technology

Which tag is used for creating button in html?

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Written question 44Programming

What does run Finalization do?

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Written question 45Database

What is data about data?

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Written question 46English

Antonym of "fantasy":

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Written question 47Mathematics

What is the largest two-digit natural number (a part of the number system, which includes all positive integers from 1 to infinity)?

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Written question 48Networking

Unit of data link layer?

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Written question 49Networking

Which layer is used to link the network support layers and user support layers?

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Written question 50Networking

Which technique is used for binary division check in network?

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Written question 51Algorithms

Which short uses divide and conquer technique?

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Written question 52Algorithms

Fastest sorting algorithms?

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Written question 53Database

Which normalization is related to functional dependency?

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Written question 54Networking

What technique allows simultaneous transmission of multiple signals across a single data link?

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Written question 55Programming

What will occur when an array is declared without size?

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Written question 56English

What is the meaning of "see eye to eye"?

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Written question 57General Knowledge

Who is the inventor of IR 4.00?

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Written question 58Mathematics

If the average of seven consecutive even numbers is 62, then the one-fourth of twice of total of first and sixth number is?

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Written question 59Networking

What is the number for the Network layer and the support layer?

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Written question 60Programming

Which type of variable violates encapsulation rules?

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Written question 61Programming

What syntax is used for calling static methods in class?

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Written question 62Database

Functional dependency use in which normalizations?

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Written question 63Programming

When a function is called more than one time that is called?

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Written question 64Cloud & Emerging Tech

Machine learning is a subset of cloud computing that can be built AI-Based. True or False.

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Written question 65Database

Which join is used for including not matching all records with output?

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Written question 66General Knowledge

What is the name of a technique that will be used to make multiple copies of target DNA in vitro?

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Question text is from the public recruitment exam; answers and explanations are written by ARBS Academy. All past papers · Government IT officer posts guide