REVISION COMPUTING DO EVERYDAY

Question 1

Define System Architecture

Answer 1

The design and structure of a computer system, describing how different parts like the CPU, memory, and I/O devices work together.

Question 2

What is the purpose of the CPU?

Answer 2

To carry out instructions by performing calculations and processing data; it’s known as the “brain” of the computer.

Question 3

What are the three main parts of the CPU?

Answer 3

Control Unit (CU), Arithmetic Logic Unit (ALU), and Registers.

Question 4

Explain the role of the Control Unit (CU)

Answer 4

Directs operations within the CPU by managing data flow between the CPU, memory, and other devices.

Question 5

What is the difference between RAM and ROM?

Answer 5

RAM is temporary and volatile, used for active processes. ROM is permanent and non-volatile, storing essential startup instructions.

Question 6

Define Cache Memory

Answer 6

A small, high-speed memory inside the CPU that stores frequently used data for faster access.

Question 7

Why is primary storage faster than secondary storage?

Answer 7

Primary storage (like RAM) is directly connected to the CPU, allowing faster data access than secondary storage (e.g., hard drives).

Question 8

What are examples of secondary storage devices?

Answer 8

Hard Disk Drives (HDD), Solid State Drives (SSD), CDs, DVDs, and USB flash drives.

Question 9

Explain the purpose of virtual memory

Answer 9

A section of the hard drive used as temporary RAM when actual RAM is full, allowing more applications to run.

Question 10

Define Binary and why computers use it

Answer 10

A number system using only 0s and 1s; computers use binary to represent data because it’s simple and reliable for digital circuits.

Question 11

What is network security?

Answer 11

Measures taken to protect a computer network from unauthorized access, attacks, and data breaches.

Question 12

Define Firewall

Answer 12

A security system that monitors and controls incoming and outgoing network traffic based on security rules.

Question 13

What is phishing?

Answer 13

A cyber-attack where attackers impersonate trusted entities to trick people into providing personal information.

Question 14

What is digital ethics?

Answer 14

The study of how technology impacts behavior, privacy, and morals in society.

Question 15

Define the Digital Divide

Answer 15

The gap between those who have access to technology and the internet and those who do not, often influenced by socioeconomic factors.

Question 16

What is the environmental impact of e-waste?

Answer 16

Electronic waste contributes to pollution and resource depletion when discarded improperly, harming ecosystems.

Question 17

What is an algorithm?

Answer 17

A set of instructions designed to perform a specific task or solve a problem.

Question 18

Define flowchart

Answer 18

A visual representation of the steps in an algorithm, using shapes and arrows to map out processes.

Question 19

What does pseudocode mean?

Answer 19

A way to write algorithms using simplified code-like language that can be easily translated into actual programming code.

Question 20

Explain what an IF statement does

Answer 20

Checks a condition; if true, it executes a specific block of code; if false, it skips or runs an alternative block.

Question 21

Define a For Loop

Answer 21

A loop that repeats a block of code a specific number of times, based on a set starting and ending point.

Question 22

What is a While Loop?

Answer 22

A loop that continues to run as long as a certain condition is true.

Question 23

Describe what a Sub-program is

Answer 23

A block of code written separately from the main program to perform a specific task, often called a function or procedure.

Question 24

What is the purpose of Input and Output in programming?

Answer 24

receives data from the user, while Output displays or sends data to the user or another system.