Basic Computer Science Quiz

What is the main function of the Central Processing Unit (CPU) in a computer?

• To store data

• To process instructions

• To display graphics

• To connect to the internet

Answer explanation

The main function of the CPU is to process instructions. It executes commands from programs, performing calculations and managing data flow, which is essential for the computer's operation.

Which of the following is an example of an operating system?

• Microsoft Word

• Windows 10

• Google Chrome

• Adobe Photoshop

Answer explanation

Windows 10 is an operating system that manages computer hardware and software resources. In contrast, Microsoft Word, Google Chrome, and Adobe Photoshop are applications that run on an operating system.

What does RAM stand for in computer hardware?

• Random Access Memory

• Readily Available Memory

• Rapid Action Module

• Remote Access Machine

Answer explanation

RAM stands for Random Access Memory, which is a type of computer memory that can be accessed randomly. It is crucial for storing data that is actively being used or processed by the computer.

Which device is used to connect a computer to a network?

• Monitor

• Keyboard

• Router

• Printer

Answer explanation

A router is a device that connects computers to a network, allowing them to communicate with each other and access the internet. Monitors, keyboards, and printers serve different functions and do not connect to networks.

What is the primary purpose of a hard drive in a computer?

• To process data

• To store data

• To display images

• To connect to the internet

Answer explanation

The primary purpose of a hard drive is to store data. It provides the necessary space for saving files, applications, and the operating system, making it essential for a computer's functionality.

Which of the following is a type of non-volatile storage?

• RAM

• Cache

• Hard Disk Drive (HDD)

• CPU

Answer explanation

A Hard Disk Drive (HDD) is a type of non-volatile storage, meaning it retains data even when powered off. In contrast, RAM and Cache are volatile, losing their data when the power is turned off.

What is the function of a web browser?

• To edit documents

• To access and view websites

• To create spreadsheets

• To design graphics

Answer explanation

The primary function of a web browser is to access and view websites. It allows users to navigate the internet, display web pages, and interact with online content, unlike editing documents or creating spreadsheets.

Which protocol is primarily used for sending emails?

• HTTP

• FTP

• SMTP

• TCP

Answer explanation

The Simple Mail Transfer Protocol (SMTP) is the standard protocol used for sending emails across the Internet, making it the correct choice among the options provided.

What is the main purpose of a firewall in a computer network?

• To increase internet speed

• To protect against unauthorized access

• To store data

• To manage user accounts

Answer explanation

The main purpose of a firewall is to protect against unauthorized access to a computer network. It acts as a barrier between trusted internal networks and untrusted external networks, controlling incoming and outgoing traffic.

Which of the following is a basic unit of data storage?

• Byte

• Pixel

• Hertz

• Node

Answer explanation

A byte is the basic unit of data storage, typically consisting of 8 bits. It is used to represent a character or a small amount of data. Other options like pixel, hertz, and node refer to different concepts in computing.