Computer science jamb past questions and answers

Computer science jamb past questions and answers

Question: What does the acronym HTML stand for?

A) Hyperlink and Text Markup Language

B) Hyper Text Markup Language

C) High-level Text Markup Language

D) Hyper Transfer Markup Language

Answer: B) Hyper Text Markup Language

Question: Which programming language is often used for developing mobile applications?

A) C++

B) Swift

C) Ruby

D) Pascal

Answer: B) Swift

Question: What is the purpose of the Git version control system?

A) Code compilation

B) Code collaboration and version tracking

C) Network security

D) Data encryption

Answer: B) Code collaboration and version tracking

Question: What is the primary function of a router in a computer network?

A) Connect devices within a local network

B) Filter and forward data between different networks

C) Provide wireless access

D) Manage computer memory

Answer: B) Filter and forward data between different networks

Question: Which of the following is a statically-typed programming language?

A) Python

B) JavaScript

C) C#

D) Ruby

Answer: C) C#

Question: What is the purpose of the SQL SELECT statement?

A) Insert data into a table

B) Retrieve data from a database

C) Update existing records

D) Delete records from a table

Answer: B) Retrieve data from a database

Question: Which type of memory is volatile and loses its content when the power is turned off?

A) RAM (Random Access Memory)

B) ROM (Read-Only Memory)

C) Cache Memory

D) Hard Disk

Answer: A) RAM (Random Access Memory)

Question: What is the purpose of the "else" statement in programming?

A) Define a loop

B) Handle exceptions

C) Specify alternative code to execute

D) Declare variables

Answer: C) Specify alternative code to execute

Question: In binary code, what does each digit represent?

A) 0 or 1

B) 1 or 2

C) 0 or 2

D) 1 or 0 or 2

Answer: A) 0 or 1

Question: What is the role of the HTTP status code 404?

A) Server error

B) Page not found

C) Unauthorized access

D) Successful request

Answer: B) Page not found

Question: Which sorting algorithm has a time complexity of O(n log n) in the worst case?

A) BubbleSort

B) MergeSort

C) QuickSort

D) InsertionSort

Answer: B) MergeSort

Question: What is the purpose of a primary key in a database table?

A) Ensure data encryption

B) Uniquely identify each record

C) Control access permissions

D) Define table relationships

Answer: B) Uniquely identify each record

Question: What does the acronym VPN stand for?

A) Virtual Private Network

B) Very Personal Network

C) Volatile Public Network

D) Visual Processing Node

Answer: A) Virtual Private Network

Question: Which programming language is often used for artificial intelligence and machine learning?

A) Java

B) C#

C) Python

D) Ruby

Answer: C) Python

Question: What is the purpose of a constructor in object-oriented programming?

A) Destroy objects

B) Initialize objects

C) Define class methods

D) Override superclass methods

Answer: B) Initialize objects

Question: What is the difference between TCP (Transmission Control Protocol) and UDP (User Datagram Protocol)?

A) TCP is connectionless, while UDP is connection-oriented

B) TCP provides reliable, ordered delivery, while UDP does not guarantee order or reliability

C) TCP is faster than UDP

D) UDP is only used for secure connections

Answer: B) TCP provides reliable, ordered delivery, while UDP does not guarantee order or reliability

Question: What is the purpose of the "break" statement in programming?

A) End the program

B) Exit a loop prematurely

C) Create a new function

D) Print a line of text

Answer: B) Exit a loop prematurely

Question: Which of the following is not a fundamental data type in programming languages?

A) Integer

B) Float

C) String

D) Array

Answer: D) Array

Question: What is the role of a compiler in programming?

A) Execute code line by line

B) Convert high-level code to machine code

C) Debug code errors

D) Manage memory allocation

Answer: B) Convert high-level code to machine code

Question: What is the purpose of the OSI model in networking?

A) Define the architecture of computer hardware

B) Provide a framework for understanding network functions

C) Specify encryption algorithms

D) Control access to network resources

Answer: B) Provide a framework for understanding network functions