Computer WAEC PAST QUESTIONS AND ANSWERS

Computer WAEC past questions and answers

Here are 20 computer science WAEC exam questions along with options and answers:

Question: What is the primary purpose of an operating system?

Options:

a) To run computer games

b) To manage hardware resources

c) To create web applications

d) To design user interfaces

Answer: b) To manage hardware resources

Question: Which programming language is often used for web development and is known for its simplicity and readability?

Options:

a) Java

b) C++

c) Python

d) Ruby

Answer: c) Python

Question: What does HTML stand for in web development?

Options:

a) HyperText Markup Language

b) High-Level Text Language

c) HyperTransfer Markup Language

d) Home Tool Markup Language

Answer: a) HyperText Markup Language

Question: Which data structure follows the Last-In-First-Out (LIFO) principle?

Options:

a) Queue

b) Stack

c) Linked List

d) Tree

Answer: b) Stack

Question: What is the term for a software application that helps manage databases?

Options:

a) Spreadsheet

b) Word Processor

c) Database Management System (DBMS)

d) Browser

Answer: c) Database Management System (DBMS)

Question: In object-oriented programming, what is the process of creating a new instance of a class called?

Options:

a) Inheritance

b) Encapsulation

c) Instantiation

d) Polymorphism

Answer: c) Instantiation

Question: What is the binary representation of the decimal number 25?

Options:

a) 11001

b) 10101

c) 11100

d) 10011

Answer: a) 11001

Question: Which networking protocol is responsible for sending and receiving email on the Internet?

Options:

a) HTTP

b) SMTP

c) FTP

d) DNS

Answer: b) SMTP

Question: What does "URL" stand for in the context of web addresses?

Options:

a) Uniform Resource Locator

b) Universal Routing Language

c) Unified Resource List

d) User Reachability Link

Answer: a) Uniform Resource Locator

Question: Which data structure organizes data in a hierarchy with a top-down structure?

Options:

a) Queue

b) Graph

c) Tree

d) Array

Answer: c) Tree

Question: In a relational database, what is a key that uniquely identifies a row in a table?

Options:

a) Primary Key

b) Foreign Key

c) Unique Key

d) Composite Key

Answer: a) Primary Key

Question: Which programming paradigm encourages the use of pure functions and avoids mutable state?

Options:

a) Imperative

b) Object-Oriented

c) Functional

d) Procedural

Answer: c) Functional

Question: What is the term for a set of well-defined rules governing the exchange of data in a computer network?

Options:

a) Protocol

b) Algorithm

c) Binary Code

d) Encryption

Answer: a) Protocol

Question: What is the primary function of an assembler in computer programming?

Options:

a) Translating high-level code into machine code

b) Managing memory allocation

c) Converting source code to bytecode

d) Handling input/output operations

Answer: a) Translating high-level code into machine code

Question: Which sorting algorithm has an average time complexity of O(n log n)?

Options:

a) Bubble Sort

b) Quick Sort

c) Insertion Sort

d) Selection Sort

Answer: b) Quick Sort

Question: What is the term for a software vulnerability that allows an attacker to take control of a computer system?

Options:

a) Firewall

b) Malware

c) Buffer Overflow

d) Anti-virus

Answer: c) Buffer Overflow

Question: What is the purpose of a "try-catch" block in programming?

Options:

a) To handle exceptions and errors

b) To define a loop

c) To create a function

d) To perform bitwise operations

Answer: a) To handle exceptions and errors

Question: Which data structure is often used to implement a priority queue?

Options:

a) Array

b) Stack

c) Queue

d) Heap

Answer: d) Heap

Question: What does the acronym SQL stand for in the context of databases?

Options:

a) Structured Query Language

b) Sequential Query Logic

c) System Query Library

d) Simple Query Line

Answer: a) Structured Query Language

Question: Which programming language was developed by Apple for iOS and macOS app development?

Options:

a) Swift

b) Java

c) C#

d) Ruby

Answer: a) Swift.