Chapter 2: Computer Hardware and Peripheral Devices (Set-2)
A computer’s “system unit” mainly refers to which physical part that contains core hardware parts
A Monitor screen
B Printer body
C CPU cabinet
D Keyboard keys
The system unit is the main cabinet that houses internal components like motherboard, CPU, RAM, storage drives, and SMPS. Monitor, printer, and keyboard are external peripherals, not the system unit.
Which part on a motherboard provides the main place to install the CPU securely
A CPU socket
B RAM slot
C VGA port
D Audio jack
The CPU socket holds the processor and provides electrical connections to the motherboard. RAM slots are for memory modules. VGA and audio jacks are external ports, not CPU mounting points.
Which motherboard part stores basic startup settings like boot order and system time settings
A GPU memory
B CMOS memory
C Printer buffer
D SSD cache
CMOS memory stores BIOS/UEFI configuration settings such as date/time and boot order. A CMOS battery keeps these settings when power is off. GPU memory and SSD cache serve different purposes.
When a computer is turned on, which action is commonly done first by BIOS/UEFI before loading OS
A Install printer driver
B Scan antivirus files
C POST hardware test
D Open office software
POST checks key hardware like RAM, CPU, and basic devices to ensure the system can boot. Drivers, antivirus scans, and applications typically load after the operating system starts.
Which power connector is mainly used to supply power from SMPS to the motherboard
A ATX power plug
B HDMI plug
C VGA plug
D RJ45 plug
The ATX main power connector delivers required voltages from the SMPS to the motherboard. HDMI and VGA are display connectors, and RJ45 is for networking, not motherboard power.
Which hardware part typically prevents CPU from being damaged by excess heat through better heat transfer
A Mouse pad
B USB cable
C Printer ribbon
D Thermal paste
Thermal paste fills microscopic gaps between CPU and heat sink, improving heat transfer. This helps cooling efficiency and reduces overheating risk. Mouse pads, cables, and ribbons do not manage CPU heat.
If a desktop makes loud whirring noise mainly from inside, which component is a common source
A Cabinet fan
B RAM chip
C BIOS chip
D CMOS cell
Fans can become noisy due to dust, worn bearings, or imbalance. RAM, BIOS chip, and CMOS cell are silent components. Cleaning or replacing the fan usually fixes the issue.
Which input device is most suitable for selecting icons and dragging files on a desktop computer
A Printer device
B Speaker device
C Mouse device
D Projector device
A mouse is a pointing device used to move the cursor, click, select, and drag items on screen. Printers, speakers, and projectors are output devices and do not control cursor movement.
A keyboard key combination like Shift helps mainly in what type of input
A Audio recording
B Modified character
C Video output
D Network sharing
Shift modifies typed input, producing uppercase letters or alternate symbols on keys. It does not record audio, output video, or handle networks. It is a basic feature of keyboard input.
Which input device is best for controlling movement in games like flight simulators
A Joystick device
B Scanner device
C Monitor device
D Plotter device
Joysticks are designed for directional control and are common in simulation and arcade-style games. Scanners input images, monitors output display, and plotters are used for large printed graphics.
Which output device is mainly used to display a computer screen on a wall for many people
A Barcode reader
B Microphone device
C Projector device
D Mouse device
A projector enlarges and displays the computer’s video output onto a screen or wall for group viewing. Barcode readers and mice are input devices, and microphones capture sound, not visuals.
Which output device changes digital audio signals into sound you can hear clearly
A Keyboard device
B Scanner device
C Pen drive
D Speaker device
Speakers convert electrical audio signals into sound waves. Keyboards and scanners are input devices, while pen drives store data. Speakers are common output peripherals for music, calls, and videos.
Which output device type is commonly used for printing photos with liquid ink
A Laser printer
B Inkjet printer
C Dot matrix
D Plotter machine
Inkjet printers spray tiny droplets of ink, making them suitable for photo printing and color output. Laser printers use toner, dot matrix uses impact pins, and plotters are for large drawings.
Which storage is “volatile” and loses data immediately when power is turned off
A ROM memory
B DVD disk
C RAM memory
D Hard disk
RAM is volatile working memory used during active tasks. When power is removed, RAM contents disappear. ROM and storage drives keep data without power, making them non-volatile.
Which device is commonly used to expand storage on phones and cameras in a small removable form
A Memory card
B CPU register
C Heat sink
D VGA cable
Memory cards like microSD provide removable storage in compact devices. CPU registers are internal CPU storage, heat sinks manage heat, and VGA cables transmit video signals to displays.
Which device is best for storing large backups externally and connecting by USB for portability
A ROM chip
B Cache chip
C External hard drive
D VGA adapter
External hard drives provide large capacity for backups and connect through USB for easy portability. ROM and cache are internal memory types, and VGA adapters are for display connections.
Which storage concept means making an extra copy of important data to prevent loss
A Data backup
B Screen refresh
C Driver update
D File rename
Backup means storing a copy of data in another location or device so it can be restored after deletion, corruption, or hardware failure. It is a key part of data safety.
Which network storage device is usually accessed over LAN and can serve multiple users
A USB hub
B NAS device
C HDMI splitter
D CMOS battery
NAS provides shared storage on a network, allowing multiple users to access files and backups. It connects through LAN using Ethernet or Wi-Fi, unlike USB hubs or HDMI splitters.
Which port is most commonly used to connect a microphone or headphones to a PC
A SATA port
B RJ45 port
C Audio jack
D VGA port
The 3.5mm audio jack is widely used for headphones, speakers, and microphones. SATA is for internal storage, RJ45 is for networking, and VGA is for video output.
Which connector is mainly used for connecting a monitor to a PC with a digital video signal
A DVI connector
B RJ11 connector
C SATA connector
D PS/2 connector
DVI carries digital video signals to monitors, improving clarity compared to analog VGA. RJ11 is for telephone lines, SATA is for storage data, and PS/2 is for old keyboard/mouse.
Which feature allows USB devices to be connected and used without restarting the computer
A Disk caching
B Safe booting
C File indexing
D Hot plugging
Hot plugging allows devices like USB drives and mice to be connected while the system is running. The OS detects them and loads drivers automatically, making usage quick and convenient.
When a phone connects to Wi-Fi, which hardware inside the phone performs wireless network communication
A VGA connector
B SATA cable
C Wi-Fi adapter
D SMPS unit
A Wi-Fi adapter (wireless chipset) sends and receives radio signals for network access. VGA and SATA are wired interfaces, and SMPS is a power supply used in desktops, not phones.
Which cable type is most commonly used for wired internet connection between router and computer
A Ethernet cable
B HDMI cable
C VGA cable
D SATA cable
Ethernet cables with RJ45 connectors provide stable wired networking for LAN and internet. HDMI and VGA are display cables, and SATA is used for internal storage connections.
What does USB “OTG” mainly allow a smartphone to do in many cases
A Increase screen size
B Act as host
C Upgrade BIOS chip
D Replace RAM slot
USB OTG lets a phone act as a host so it can connect devices like pen drives, keyboards, or mice directly. It is a connectivity feature, not related to display, BIOS, or RAM slots.
Which software component is needed so a new graphics card can work properly in Windows
A BIOS password
B File manager
C GPU driver
D Printer spool
A graphics driver enables the operating system to communicate with the graphics card and use advanced features like high resolution and 3D acceleration. Without it, display may be limited.
If a device shows a yellow warning icon in Device Manager, what does it usually indicate
A Driver problem
B Extra free RAM
C Strong Wi-Fi
D Full battery
A warning symbol commonly means a driver is missing, incorrect, or the device has a resource conflict. Checking drivers, reinstalling, or updating often resolves the problem.
Which step is best when a newly connected USB printer is not detected at all
A Change wallpaper
B Check USB port
C Rename folders
D Reduce brightness
Testing another USB port/cable and ensuring power are basic troubleshooting steps. If the port is faulty, the printer may not be detected. Wallpaper, folders, and brightness do not affect detection.
Which term means a hardware device works correctly with a specific OS and system configuration
A Disk fragmentation
B Screen scaling
C Hardware compatibility
D File compression
Compatibility means hardware can operate properly with the OS, drivers, and system architecture. Lack of compatibility can cause driver issues or non-working devices. Fragmentation and compression are different concepts.
Which system resource is commonly shared and assigned to devices so they can communicate without conflict
A IRQ resource
B Font size
C Wallpaper theme
D Browser cookies
IRQ (interrupt request) lines help devices signal the CPU for attention. Modern systems manage these automatically, but conflicts can still occur in some cases. Font size and cookies are unrelated.
In Windows, what is the common tool used to update drivers automatically through the system
A Paint program
B Notepad tool
C Taskbar clock
D Windows Update
Windows Update can deliver driver updates and security patches. It helps keep hardware working smoothly with the latest compatible drivers. Paint and Notepad are basic apps and do not manage drivers.
Which storage type is generally faster for booting an operating system than an HDD
A DVD disk
B Floppy disk
C SSD drive
D Tape drive
SSDs provide faster read/write speeds and lower access time than HDDs. This improves boot speed and application loading. DVDs, floppies, and tape drives are much slower and not used for OS boot.
What is the main benefit of cache memory for normal computer performance
A Permanent file storage
B Faster repeated access
C Better printer ink
D Stronger Wi-Fi
Cache stores frequently used data close to the CPU, reducing the time needed to fetch from RAM. This improves overall processing speed. It does not permanently store files or affect printing or Wi-Fi strength.
A motherboard “BIOS update” is mainly done to improve what kind of things
A Compatibility and fixes
B Increase monitor size
C Add printer ink
D Reduce keyboard noise
BIOS/UEFI updates can add CPU or RAM support, fix bugs, and improve stability. It does not directly change monitor size, printer ink, or keyboard sound.
Which part of SMPS helps protect computer parts by providing steady regulated voltage output
A Mouse sensor
B HDMI signal
C Paper tray
D Voltage regulation
SMPS delivers stable DC voltages required by components. Proper regulation prevents damage from voltage fluctuations inside the system. Mouse sensors, HDMI signals, and paper trays are unrelated to power regulation.
Which preventive step best protects data if a storage drive fails suddenly
A Increase fan speed
B Change monitor cable
C Regular backups
D Install wallpaper pack
Backups ensure data can be restored if a drive fails, gets corrupted, or is accidentally deleted. Cooling helps hardware life, but only backups directly protect data from being permanently lost.
Which connector is commonly used to connect modern printers and scanners directly to a PC
A USB cable
B VGA cable
C DVI cable
D SATA cable
USB is widely used for printers, scanners, and many peripherals due to plug-and-play support. VGA and DVI are display cables, and SATA is used internally for storage devices.
Which output device shows pictures and text using tiny light-emitting elements in modern screens
A Dot matrix
B LED monitor
C Joystick pad
D Barcode reader
In common terms, LED monitors are LCD panels with LED backlighting, giving good brightness and efficiency. Dot matrix is a printer technology, joystick is input, and barcode reader is input.
Which motherboard battery issue can cause wrong system date and time after shutdown
A Full RAM slot
B Fast SSD drive
C Weak CMOS battery
D Clean heat sink
A weak CMOS battery cannot maintain clock and BIOS settings when power is off. This often resets date/time and settings. RAM, SSD speed, and heat sink cleanliness do not set time.
Which type of cable is mainly used to connect a monitor to a computer for video display
A Display cable
B Power cable
C Audio cable
D Network cable
Video output uses display cables like HDMI, VGA, DVI, or DisplayPort. Power cables supply electricity, audio cables handle sound, and network cables connect to LAN/internet, not video output.
Which internal part provides multiple slots to install RAM modules on a motherboard
A DIMM slots
B SATA ports
C USB ports
D RJ45 ports
DIMM slots are designed for RAM modules and provide the connection and locking mechanism. SATA ports are for storage drives, USB ports are external connectors, and RJ45 is used for networking.
If a PC cabinet has poor airflow, which problem becomes more likely during long usage
A Faster typing
B Overheating risk
C Better audio
D Higher printing
Poor airflow traps heat inside the cabinet, raising CPU/GPU temperatures and causing throttling or shutdowns. Typing, audio quality, and printing performance do not improve with blocked airflow.
Which is a safe basic practice before touching internal components of a desktop computer
A Increase screen brightness
B Open web browser
C Power off and unplug
D Print a page
Turning off and unplugging reduces electrical risk and protects components. It also helps avoid accidental short circuits. Brightness, browsing, and printing are unrelated to safe internal hardware handling.
Which type of cabinet is designed to stand vertically on the floor or desk
A Flatbed scanner
B Rack switch
C Inkjet tray
D Tower cabinet
Tower cabinets are upright cases used for desktops, providing space for cooling and expansion. Scanners and trays are peripherals, and rack equipment is a different category used in server environments.
Which part helps connect additional devices like printers and pen drives without opening the cabinet
A I/O ports
B CPU registers
C Cache memory
D Heat sink
I/O ports are external connectors for peripherals like USB devices, monitors, and audio. CPU registers and cache are internal processing memory, and heat sinks handle cooling, not device connection.
Which printer type is known for printing multi-part forms using impact printing
A Inkjet printer
B Laser printer
C Dot matrix
D Thermal printer
Dot matrix printers use impact pins and ribbons, so they can print carbon copies and continuous paper. Inkjet and laser are non-impact printers, and thermal printers need special heat-sensitive paper.
Which term best describes a device that has both input and output functions in one unit
A Plotter machine
B Touchscreen device
C Speaker box
D UPS unit
A touchscreen displays output and also accepts input through touch. Plotters and speakers are output-only, and UPS provides power backup. Touchscreens are common in phones, kiosks, and tablets.
Which file transfer method is typically faster than Bluetooth when using a wireless local network
A Wi-Fi transfer
B VGA transfer
C SATA transfer
D BIOS transfer
Wi-Fi generally offers higher bandwidth than Bluetooth, making large file transfers faster over a local network. VGA is display only, SATA is internal wired storage, and BIOS is firmware, not transfer method.
Which troubleshooting step helps when a USB device is not working due to corrupt driver
A Change monitor stand
B Clean mouse pad
C Reinstall device driver
D Increase volume
Reinstalling the driver removes corrupted files and restores proper communication between OS and device. Physical accessories like stands or pads do not fix driver corruption, and volume change is unrelated.
Which basic unit is smaller than a megabyte and commonly used for small text files
A Kilobyte unit
B Terabyte unit
C Petabyte unit
D Exabyte unit
A kilobyte is a small unit used for small files like plain text documents. Megabytes and higher units measure larger files and storage. Petabyte and exabyte are used for huge data scales.
Which connector is commonly used for connecting a monitor with both video and sound in many setups
A RJ45 cable
B SATA cable
C RJ11 cable
D HDMI cable
HDMI carries digital video and audio through one cable, making it common for monitors and TVs. RJ45 is networking, SATA is for drives, and RJ11 is for telephone lines, not display audio-video.