Q.1 Which of the following is considered the brain of the computer?
RAM
CPU
Hard Disk
GPU
Explanation - The Central Processing Unit (CPU) executes instructions and processes data, making it the brain of the computer.
Correct answer is: CPU
Q.2 Which hardware component is primarily used for permanent storage?
RAM
ROM
Hard Disk Drive
Cache Memory
Explanation - Hard Disk Drives (HDD) and Solid State Drives (SSD) are used for long-term storage of data and programs.
Correct answer is: Hard Disk Drive
Q.3 Which of the following is a volatile memory?
ROM
Hard Disk
RAM
SSD
Explanation - RAM (Random Access Memory) is volatile, meaning it loses its data when the power is turned off.
Correct answer is: RAM
Q.4 Which part of the computer is responsible for rendering graphics?
CPU
GPU
RAM
Motherboard
Explanation - The Graphics Processing Unit (GPU) is specialized for rendering images, videos, and animations.
Correct answer is: GPU
Q.5 Which of these devices is an input device?
Monitor
Keyboard
Printer
Speaker
Explanation - A keyboard is an input device used to enter data into the computer.
Correct answer is: Keyboard
Q.6 Which device converts digital signals to analog for transmission over telephone lines?
Router
Modem
Switch
Hub
Explanation - A modem modulates digital signals to analog and demodulates incoming analog signals to digital.
Correct answer is: Modem
Q.7 Which component is used to connect all internal parts of a computer?
Motherboard
CPU
RAM
Power Supply
Explanation - The motherboard provides the main circuit for connecting CPU, memory, and peripheral devices.
Correct answer is: Motherboard
Q.8 Which memory type is non-volatile and can be electronically erased and reprogrammed?
RAM
ROM
EEPROM
Cache
Explanation - EEPROM (Electrically Erasable Programmable Read-Only Memory) retains data even without power and can be rewritten electronically.
Correct answer is: EEPROM
Q.9 Which of the following is NOT an output device?
Printer
Monitor
Keyboard
Speaker
Explanation - A keyboard is an input device, whereas monitors, printers, and speakers are output devices.
Correct answer is: Keyboard
Q.10 Which type of RAM is faster?
DRAM
SRAM
ROM
Cache
Explanation - Static RAM (SRAM) is faster than Dynamic RAM (DRAM) because it does not need to be refreshed constantly.
Correct answer is: SRAM
Q.11 Which device is used to increase the number of USB ports available?
Hub
Switch
Router
Modem
Explanation - A USB hub expands a single USB port into multiple ports to connect more devices.
Correct answer is: Hub
Q.12 Which part of the computer stores the firmware?
RAM
ROM
Cache
Hard Disk
Explanation - ROM stores firmware, which is the permanent software programmed into the hardware.
Correct answer is: ROM
Q.13 Which of the following is used to supply power to a computer?
Motherboard
Power Supply Unit
CPU
GPU
Explanation - The PSU converts AC power from the wall into DC power used by computer components.
Correct answer is: Power Supply Unit
Q.14 Which type of storage device has no moving parts?
HDD
SSD
Optical Disk
Tape Drive
Explanation - Solid State Drives (SSD) use flash memory and have no moving parts, making them faster and more durable than HDDs.
Correct answer is: SSD
Q.15 Which device is used to display the output visually?
Monitor
Printer
Keyboard
Scanner
Explanation - Monitors display visual output from the computer for the user to see.
Correct answer is: Monitor
Q.16 Which of the following is considered secondary memory?
RAM
ROM
Hard Disk
Cache
Explanation - Secondary memory refers to storage devices that retain data permanently, such as hard disks and SSDs.
Correct answer is: Hard Disk
Q.17 Which hardware component is responsible for executing arithmetic and logical operations?
RAM
ALU
GPU
ROM
Explanation - The Arithmetic Logic Unit (ALU) performs all arithmetic and logical operations inside the CPU.
Correct answer is: ALU
Q.18 Which port is commonly used to connect external storage devices?
HDMI
USB
VGA
Ethernet
Explanation - Universal Serial Bus (USB) ports are widely used for connecting external drives, flash drives, and other peripherals.
Correct answer is: USB
Q.19 Which device is essential for wireless network connectivity?
Router
Modem
NIC
Hub
Explanation - A Network Interface Card (NIC) allows a computer to connect to a network, including wireless networks.
Correct answer is: NIC
Q.20 Which type of monitor uses liquid crystals to display images?
CRT
LED
LCD
OLED
Explanation - Liquid Crystal Display (LCD) monitors use liquid crystals to control light and produce images on the screen.
Correct answer is: LCD
Q.21 Which of these is considered volatile memory?
ROM
Cache
RAM
SSD
Explanation - Volatile memory loses its data when the power is turned off. RAM is a common example.
Correct answer is: RAM
Q.22 Which component connects the processor to the main memory?
Motherboard
Bus
Hard Disk
Power Supply
Explanation - A bus is a communication system that transfers data between components like CPU, memory, and peripherals.
Correct answer is: Bus
Q.23 Which is the primary interface between the CPU and main memory?
ALU
Control Unit
Bus
Cache
Explanation - The bus serves as the main communication pathway between the CPU and memory or other devices.
Correct answer is: Bus
Q.24 Which type of device can both send and receive data?
Input Device
Output Device
Input/Output Device
Storage Device
Explanation - Input/Output (I/O) devices, like touchscreens, can both send information to the computer and display results to the user.
Correct answer is: Input/Output Device
Q.25 Which part of the computer is responsible for cooling the CPU?
Fan
Heatsink
Both Fan and Heatsink
Power Supply
Explanation - The CPU is cooled using a combination of a heatsink (which absorbs heat) and a fan (which dissipates it).
Correct answer is: Both Fan and Heatsink