Computer Studies

Includes fundamentals of computers, hardware and software, operating systems, MS Office, internet, networking, and basic IT concepts for recruitment exams.

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1
What is the Central Processing Unit (CPU)?
Easy 1 Mark
The CPU is often called the brain of the computer.
A The screen that displays output to the user
B The main processing component of a computer that executes instructions and controls all hardware
C The storage device used to save permanent files
D The component that supplies power to the computer
2
Why is the CPU often called the brain of the computer?
Easy 1 Mark
Think about what role the brain plays in a human body.
A Because it stores all data permanently
B Because it is the largest component inside a computer
C Because it performs most processing tasks and controls all other hardware components
D Because it generates power for all other components
3
Which of the following tasks does the CPU perform?
Easy 1 Mark
Think about the core jobs a processor does every second.
A Displaying graphics on the monitor only
B Storing data permanently on the hard disk
C Executing instructions performing calculations and managing data flow
D Supplying electricity to input and output devices
4
What are the three main components of the CPU?
Easy 1 Mark
Think about the units that control calculate and temporarily store data inside the CPU.
A RAM ROM and Cache
B Hard disk SSD and USB
C Control Unit ALU and Registers
D Monitor Keyboard and Mouse
5
What is the role of the Control Unit (CU) in the CPU?
Easy 1 Mark
The CU does not process data — it manages and directs everything.
A To perform arithmetic calculations on data
B To store large amounts of data permanently
C To control and coordinate all operations of the computer and direct data movement
D To supply power to the CPU components
6
Does the Control Unit perform actual data processing?
Easy 1 Mark
The CU is like a manager — it tells others what to do but does not do the work itself.
A Yes it performs all arithmetic operations
B Yes it performs logical comparisons
C No it only manages and supervises how instructions are executed
D Yes it stores all intermediate results
7
What does the ALU stand for?
Easy 1 Mark
Break it down: Arithmetic + Logic + Unit.
A Arithmetic Loading Unit
B Arithmetic Logic Unit
C Automated Logic Unit
D Advanced Loading Utility
8
What is the main function of the ALU?
Easy 1 Mark
ALU = Arithmetic + Logic — what two types of operations does it do?
A To store data permanently in the hard disk
B To control the flow of data between CPU and memory
C To perform mathematical calculations and logical operations
D To supply power to the CPU
9
Which of the following is an arithmetic operation performed by the ALU?
Easy 1 Mark
Arithmetic means mathematical calculations — which option is a calculation?
A AND operation
B Greater than comparison
C Subtraction
D NOT operation
10
Which of the following is a logical operation performed by the ALU?
Easy 1 Mark
Logical operations involve true/false decisions — not pure calculations.
A Addition
B Division
C Multiplication
D AND operation
11
What are registers in the CPU?
Easy 1 Mark
Registers are inside the CPU itself — the fastest and smallest storage.
A Large storage areas on the hard disk
B Small high-speed storage locations inside the CPU for temporary data storage
C A type of cache memory shared between CPU cores
D External memory cards connected to the motherboard
12
Why are registers faster than RAM?
Easy 1 Mark
Speed depends on distance — registers are inside the CPU itself.
A Because registers use optical technology
B Because registers are located directly inside the processor
C Because registers have a larger storage capacity
D Because registers use magnetic disks
13
What is the Instruction Cycle?
Easy 1 Mark
The CPU repeats this cycle continuously for every instruction in a program.
A The time it takes to start a computer
B The process through which the CPU retrieves and executes instructions from memory
C The cycle of refreshing RAM contents
D The process of saving data to secondary storage
14
The Instruction Cycle is also known as:
Easy 1 Mark
Name the three stages of the instruction cycle.
A The Boot-Load-Run cycle
B The Read-Write-Store cycle
C The Fetch-Decode-Execute cycle
D The Input-Process-Output cycle
15
What are the three stages of the Instruction Cycle in correct order?
Easy 1 Mark
The CPU cannot decode before fetching or execute before decoding.
A Execute then Decode then Fetch
B Fetch then Execute then Decode
C Decode then Fetch then Execute
D Fetch then Decode then Execute
16
After one Instruction Cycle is complete what does the CPU do?
Easy 1 Mark
Programs have many instructions — what does the CPU do after finishing one?
A The CPU shuts down and waits for input
B The CPU immediately begins the next cycle by fetching another instruction
C The CPU transfers all data to secondary storage
D The CPU resets the program counter to zero
17
Which of the following is a task performed by the CPU?
Easy 1 Mark
Which option describes something only the processor itself does?
A Displaying images on the monitor
B Storing files permanently on the hard disk
C Executing program instructions and performing arithmetic operations
D Providing electrical power to all components
18
Which devices rely on a CPU to perform processing tasks?
Easy 1 Mark
Think about how many different devices have a processor inside them.
A Only desktop computers
B Only smartphones and tablets
C Personal computers smartphones servers and embedded systems
D Only supercomputers
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