Chapter 2: Computer Hardware and Peripheral Devices (Set-6)
Which component is called the main processing unit of a computer system
A Monitor
B CPU
C Keyboard
D Printer
The CPU is known as the brain of the computer. It processes instructions, performs calculations, and controls the overall operation of the system by coordinating other hardware components.
Which part of CPU performs arithmetic calculations like addition and subtraction
A Control unit
B Register
C ALU
D Cache
The Arithmetic Logic Unit performs mathematical operations and logical comparisons. It is a core part of the CPU responsible for calculations, while other units control or store data temporarily.
Which CPU unit directs and controls all operations of the computer
A ALU
B Control unit
C RAM
D Hard disk
The control unit manages the execution of instructions by sending control signals to different components. It ensures tasks are carried out in the correct sequence inside the computer.
Which small memory inside CPU stores data temporarily during processing
A Hard disk
B Pen drive
C DVD
D Register
Registers are very fast storage locations inside the CPU. They temporarily hold data, instructions, or addresses needed immediately during processing to speed up execution.
Which component connects all internal parts like CPU, RAM, and storage devices
A Cabinet
B Monitor
C Motherboard
D Mouse
The motherboard is the main circuit board that connects and allows communication between CPU, memory, storage, and other hardware components of the computer system.
Which firmware starts the computer and loads the operating system
A BIOS
B Word processor
C Antivirus
D Device driver
BIOS initializes hardware components and begins the boot process when the computer is powered on. It then transfers control to the operating system loader.
Which hardware component supplies power to all internal parts of a computer
A Heat sink
B SMPS
C Cabinet
D RAM
The SMPS converts AC power into regulated DC power and supplies it to the motherboard, drives, and other internal components safely.
Which device is used to reduce heat generated by the CPU
A Keyboard
B Speaker
C Heat sink
D Scanner
A heat sink absorbs and dissipates heat from the CPU, helping maintain safe operating temperature and preventing overheating during continuous processing.
Which input device is mainly used to type text into a computer
A Mouse
B Scanner
C Webcam
D Keyboard
A keyboard is the primary input device used for entering text, numbers, and commands into the computer using keys.
Which pointing device is used to move the cursor on the screen
A Keyboard
B Mouse
C Printer
D Monitor
A mouse controls the movement of the pointer on the screen and helps in selecting, clicking, and dragging items easily.
Which input device is used to scan printed documents into digital form
A Scanner
B Plotter
C Speaker
D Joystick
A scanner converts printed text or images into digital files that can be stored, edited, or shared on a computer.
Which device is used for video calling and capturing live video
A Monitor
B Printer
C Webcam
D Speaker
A webcam captures live video and sends it to the computer for video calls, online meetings, and recordings.
Which input device is mainly used to record sound into a computer
A Speaker
B Microphone
C Printer
D Monitor
A microphone converts sound waves into digital signals, allowing voice recording, online communication, and speech input.
Which input device is commonly used for playing video games
A Scanner
B Plotter
C Printer
D Joystick
A joystick provides directional control and is widely used in gaming and simulation applications for better movement control.
Which output device displays text and images on the screen
A Keyboard
B Mouse
C Monitor
D Scanner
A monitor shows visual output such as text, images, and videos generated by the computer system.
Which output device produces printed documents on paper
A Scanner
B Printer
C Mouse
D Keyboard
A printer converts digital documents into physical paper output, commonly used for reports, letters, and images.
Which output device is used to hear sound from a computer
A Speaker
B Scanner
C Webcam
D Mouse
Speakers convert digital audio signals into sound, allowing users to listen to music, videos, and system alerts.
Which device is used to project computer output onto a large screen
A Monitor
B Printer
C Projector
D Plotter
A projector displays the computer screen onto a wall or large screen, useful for presentations and classroom teaching.
Which output device is mainly used for large engineering drawings
A Printer
B Plotter
C Monitor
D Speaker
A plotter produces large, high-precision drawings such as maps, architectural designs, and engineering plans.
Which memory is volatile and loses data when power is turned off
A ROM
B Hard disk
C SSD
D RAM
RAM stores data temporarily for active tasks. When the computer is switched off, all data stored in RAM is lost.
Which memory stores permanent instructions for starting the computer
A RAM
B Cache
C ROM
D Register
ROM stores firmware instructions required to boot the computer. It retains data even when power is turned off.
Which memory is fastest among RAM, cache, and hard disk
A RAM
B Cache
C Hard disk
D DVD
Cache memory is very fast and stores frequently used data close to the CPU, improving overall processing speed.
Which storage device uses magnetic disks to store data
A HDD
B SSD
C DVD
D Pen drive
A hard disk drive stores data magnetically on rotating platters and is commonly used for large-capacity storage.
Which storage device has no moving parts and works faster than HDD
A DVD
B Floppy
C SSD
D Tape
SSDs use flash memory, making them faster, quieter, and more durable than traditional hard disk drives.
Which portable storage device connects through USB port
A RAM
B Pen drive
C Cache
D Register
A pen drive is a portable flash storage device that connects via USB for easy data transfer.
Which small storage card is commonly used in mobile phones and cameras
A Hard disk
B DVD
C Cache
D Memory card
Memory cards provide removable storage in compact devices like smartphones, cameras, and tablets.
Which storage device uses laser technology to read data
A SSD
B RAM
C Optical disk
D Register
Optical disks such as CDs and DVDs use laser beams to read and write data.
Which unit is used to measure storage capacity
A Gigabyte
B Hertz
C Volt
D Ampere
Storage capacity is measured in bytes, with gigabyte being a common unit for memory and disk sizes.
Which device is used to store backup data externally
A Register
B External HDD
C Cache
D BIOS
An external hard drive provides large storage capacity and is commonly used for data backup and transfer.
Which storage system allows multiple users to access data over a network
A Pen drive
B DVD
C NAS
D RAM
Network Attached Storage allows shared storage access over a network, commonly used in offices and homes.
Which component holds RAM modules on the motherboard
A SATA ports
B USB ports
C VGA ports
D RAM slots
RAM slots are connectors on the motherboard designed to install and hold memory modules securely.
Which slot is used to install a graphics card
A PCIe slot
B RAM slot
C SATA port
D USB port
Graphics cards are installed in PCIe expansion slots, usually PCIe x16, for high-speed data transfer.
Which component keeps BIOS settings when the computer is powered off
A SMPS
B Heat sink
C CMOS battery
D Fan
The CMOS battery maintains BIOS settings and system time when the computer is turned off.
Which device protects a computer during sudden power failure
A Scanner
B UPS
C Plotter
D Mouse
A UPS provides temporary backup power and allows safe shutdown during power cuts.
Which device helps control voltage fluctuations in power supply
A Speaker
B Monitor
C Printer
D Voltage stabilizer
A voltage stabilizer regulates incoming voltage and protects computer components from damage due to power fluctuations.
Which safety precaution prevents damage from static electricity
A High brightness
B Fast boot
C ESD protection
D Disk cleanup
ESD protection prevents static discharge that can damage sensitive electronic components during handling.
Which problem can occur due to dust inside a computer cabinet
A Faster speed
B Overheating
C Better sound
D Extra storage
Dust blocks airflow and cooling fans, causing heat buildup and possible hardware damage.
Which cabinet type stands vertically on the floor or desk
A Tower cabinet
B Flat cabinet
C Scanner
D Plotter
Tower cabinets are upright cases designed to hold desktop computer components with better airflow.
Which printer uses liquid ink to print images and documents
A Laser printer
B Dot matrix
C Inkjet printer
D Thermal printer
Inkjet printers spray liquid ink and are suitable for color printing and photos.
Which printer uses toner powder for printing
A Inkjet printer
B Laser printer
C Plotter
D Dot matrix
Laser printers use toner and heat to produce fast and sharp text output, commonly used in offices.
Which printer type is impact-based
A Inkjet
B Laser
C Thermal
D Dot matrix
Dot matrix printers use pins that strike an ink ribbon onto paper, making them impact printers.
Which display technology uses LED backlight
A CRT monitor
B LED monitor
C Plasma monitor
D Plotter
LED monitors are LCD displays that use LED backlighting for better brightness and energy efficiency.
Which form factor defines motherboard size and layout
A Form factor
B Bit rate
C Resolution
D File format
Form factor specifies motherboard dimensions and layout, affecting compatibility with cabinets and components.
Which storage method combines multiple drives for speed or safety
A BIOS
B Cache
C RAID
D Register
RAID combines multiple disks to improve performance, provide redundancy, or both depending on the configuration.
Which maintenance activity helps improve cooling
A Renaming files
B Cleaning dust
C Changing wallpaper
D Installing fonts
Regular cleaning removes dust from fans and vents, improving airflow and reducing overheating.
Which component stores frequently used data close to CPU
A Hard disk
B DVD
C Tape
D Cache memory
Cache memory stores frequently accessed data near the CPU to reduce access time and improve speed.
Which storage device is best for long-term data backup
A Register
B Cache
C External HDD
D RAM
External hard drives provide large capacity and are commonly used for long-term data backup.
Which unit measures very small data size
A Terabyte
B Kilobyte
C Petabyte
D Exabyte
Kilobyte is a small unit of data measurement, commonly used for small text files.
Which device is both an input and output device
A Touchscreen
B Speaker
C Printer
D Scanner
A touchscreen displays output and also accepts user input through touch.
Which hardware part houses all internal components
A Monitor
B Keyboard
C Cabinet
D Mouse
The cabinet encloses and protects internal components like motherboard, CPU, storage, and power supply, forming the physical structure of a desktop computer.