Hardware MCQs – Set-1 | 50 questions on motherboards, processors, memory modules, storage, cooling, connectors, and peripherals.
Mixed difficulty · Select one answer and open each explanation to review the concept.
What is the motherboard’s main job?
A Connect system components
B Store permanent files
C Display images
D Print documents
Answer: A. Connect system components. The motherboard is the main circuit board connecting a computer’s components.
Where is a desktop processor installed?
A DIMM socket
B CPU socket
C Drive bay
D Fan header
Answer: B. CPU socket. A desktop CPU is installed in a compatible processor socket on the motherboard.
Which motherboard component coordinates many peripheral connections?
A Heat sink
B Power supply
C Chipset
D Keyboard controller
Answer: C. Chipset. The motherboard chipset manages many of the system’s I/O connections and buses.
Which slot commonly accepts a modern graphics card?
A DIMM slot
B SATA port
C Audio jack
D PCI Express slot
Answer: D. PCI Express slot. Discrete graphics cards commonly connect through a PCI Express expansion slot.
Why install an expansion card?
A Add a hardware capability
B Cool the power supply
C Increase screen brightness
D Protect files from deletion
Answer: A. Add a hardware capability. An expansion card adds capabilities such as graphics, networking, or audio.
What does a desktop DIMM usually hold?
A Processor
B System memory
C Power cable
D Storage platter
Answer: B. System memory. A DIMM is a common module form factor for desktop memory.
Which compact memory module is common in laptops?
A ATX
B PCIe
C SO-DIMM
D SATA
Answer: C. SO-DIMM. SO-DIMM modules are a smaller memory form factor commonly used in laptops.
What does a motherboard voltage regulator do?
A Stores user files
B Renders graphics
C Connects headphones
D Supplies stable component voltage
Answer: D. Supplies stable component voltage. Voltage regulation circuits provide suitable, stable voltage to components such as the processor.
Which component distributes power inside a desktop PC?
A Power supply unit
B Graphics card
C Network adapter
D Memory module
Answer: A. Power supply unit. The power supply unit converts incoming power and distributes it to computer components.
What conversion does a typical PC power supply perform?
A DC to optical data
B AC to DC
C Sound to voltage
D Heat to storage
Answer: B. AC to DC. A desktop power supply converts mains AC power into DC power used by internal components.
What is the benefit of a modular power supply?
A Cables can be detached
B It stores more data
C It cools the CPU
D It adds RAM channels
Answer: A. Cables can be detached. Modular designs allow unused power cables to be detached, simplifying cable management.
Which component specializes in rendering graphics?
A Network interface
B Sound card
C Graphics processing unit
D Storage controller
Answer: C. Graphics processing unit. A graphics processing unit is designed to handle graphics rendering and parallel workloads.
What does graphics memory mainly hold?
A Operating system files
B Keyboard input
C Cooling profiles
D Image and texture data
Answer: D. Image and texture data. Video memory stores graphics data such as textures and frame buffers for GPU work.
How does a hard disk drive store data?
A Magnetically on platters
B In optical pixels
C Inside CPU registers
D As printed marks
Answer: A. Magnetically on platters. Hard disk drives record data magnetically on rotating platters.
Which feature distinguishes an SSD from an HDD?
A Uses spinning platters
B Has no moving disk parts
C Requires optical media
D Uses paper tape
Answer: B. Has no moving disk parts. A solid-state drive stores data electronically in flash memory without rotating platters.
Which storage protocol commonly uses PCIe for SSD access?
A VGA
B SATA only
C NVMe
D PS/2
Answer: C. NVMe. NVMe is a storage protocol designed for nonvolatile memory devices over PCIe.
What does M.2 primarily describe for a drive?
A File system
B Power rating
C Memory speed
D Form factor
Answer: D. Form factor. M.2 describes a compact card and connector form factor; it does not by itself guarantee a particular data protocol.
Which interface is widely used by internal SATA drives?
A Serial ATA
B USB-C only
C HDMI
D DisplayPort
Answer: A. Serial ATA. Serial ATA is an interface used to connect storage devices to a computer.
What is the main purpose of a CPU cooler?
A Increase storage capacity
B Remove processor heat
C Send network packets
D Improve keyboard response
Answer: B. Remove processor heat. A CPU cooler transfers heat away from the processor to help keep temperatures within operating limits.
How does a heat sink usually remove heat?
A By storing electricity
B By rotating magnetic disks
C By conducting heat to fins
D By compressing files
Answer: C. By conducting heat to fins. A heat sink conducts heat away from a component and exposes it to a larger surface area.
Why is thermal paste applied between CPU and cooler?
A To store excess power
B To insulate the CPU completely
C To increase fan speed
D To fill microscopic gaps
Answer: D. To fill microscopic gaps. Thermal paste fills tiny surface gaps so heat can transfer more effectively to the cooler.
What can a well-designed case airflow path help prevent?
A Excess heat buildup
B File corruption
C Slow keyboard typing
D Low screen resolution
Answer: A. Excess heat buildup. Case airflow carries heated air away and helps prevent excessive internal temperatures.
Which cooling method uses a moving fan?
A Passive cooling
B Active cooling
C Optical cooling
D Magnetic cooling
Answer: B. Active cooling. A fan is an active cooling component because it has moving parts.
What is the usual role of an exhaust fan?
A Pull cold air through storage
B Increase CPU clock rate
C Move warm case air outward
D Supply power to the board
Answer: C. Move warm case air outward. An exhaust fan helps move warm air out of the computer case.
Where is a case fan commonly connected on the motherboard?
A CPU socket
B SATA connector
C Display output
D Fan header
Answer: D. Fan header. Motherboards provide fan headers for connecting and controlling cooling fans.
Which card normally connects through PCIe lanes?
A Discrete graphics card
B Memory DIMM
C CPU cooler
D Power cord
Answer: A. Discrete graphics card. A discrete graphics card commonly connects to the motherboard over PCI Express.
What does a dedicated sound card provide?
A More storage bays
B Audio input and output
C Extra CPU cores
D Faster screen refresh
Answer: B. Audio input and output. A sound card handles audio input, output, or processing.
Which component gives a computer wired network access?
A GPU
B RAM
C Network interface card
D Power supply
Answer: C. Network interface card. A network interface card provides a connection to a wired or wireless network.
What is distinctive about the USB Type-C connector shape?
A One-way keyed shape
B It contains a fan
C It carries only power
D It is reversible
Answer: D. It is reversible. The USB Type-C connector is reversible, though its data and power capabilities depend on the product.
Which connection commonly carries digital video and audio to a display?
A HDMI
B RJ-11
C PS/2
D SATA
Answer: A. HDMI. HDMI is a digital interface commonly used to carry audio and video to a display.
Which port is primarily designed for connecting a display?
A Ethernet
B DisplayPort
C SATA
D Audio input
Answer: B. DisplayPort. DisplayPort is a digital display interface for connecting computers and monitors.
Which connector is commonly associated with wired Ethernet?
A USB Type-A
B HDMI
C RJ-45
D 3.5 mm audio
Answer: C. RJ-45. RJ-45 modular connectors are commonly used for Ethernet network cables.
What might a 3.5 mm audio jack connect?
A Solid-state drive
B Graphics card
C Case fan
D Headphones or microphone
Answer: D. Headphones or microphone. A 3.5 mm audio jack commonly connects headphones, speakers, or a microphone.
Which device captures live video for a computer?
A Webcam
B Projector
C Printer
D Speaker
Answer: A. Webcam. A webcam captures video as input for a computer.
What does a microphone provide to a computer?
A Video output
B Audio input
C Printed output
D Network routing
Answer: B. Audio input. A microphone converts sound into an input signal a computer can process.
Which hardware component converts audio signals into audible sound?
A Scanner
B Keyboard
C Speaker
D SSD
Answer: C. Speaker. Speakers produce sound output from an audio signal.
What does a printer produce from a digital document?
A A network address
B A system backup
C A graphics calculation
D A physical copy
Answer: D. A physical copy. A printer converts digital documents into physical output.
How is monitor resolution commonly expressed?
A Pixel dimensions
B Battery voltage
C Memory channels
D Fan revolutions
Answer: A. Pixel dimensions. Display resolution is commonly specified by the number of pixels across and down.
What does a monitor refresh rate count?
A Pixels per image
B Screen updates per second
C Colors per cable
D Files per minute
Answer: B. Screen updates per second. Refresh rate measures how many times a display updates each second, usually in hertz.
Which display element forms part of a digital image?
A Thermal paste
B Drive sector
C Pixel
D Power rail
Answer: C. Pixel. A pixel is an individual picture element used to form a digital image.
How does an OLED display create light?
A A rotating backlight
B A magnetic platter
C A single CPU fan
D Self-emitting pixels
Answer: D. Self-emitting pixels. OLED pixels emit their own light, so the panel does not need a separate backlight.
What does a flatbed scanner digitize?
A Paper documents and images
B Audio from speakers
C Network traffic
D CPU instructions
Answer: A. Paper documents and images. A scanner captures physical documents or images as digital data.
Which device converts keystrokes into computer input?
A Monitor
B Keyboard
C Power supply
D Projector
Answer: B. Keyboard. A keyboard sends typed characters and key commands to the computer.
What does a computer mouse control?
A Processor voltage
B Storage capacity
C Pointer movement
D Display resolution
Answer: C. Pointer movement. A mouse is a pointing device used to control the screen pointer.
What is one benefit of an uninterruptible power supply?
A Adds graphics memory
B Improves Wi-Fi range
C Cools the motherboard
D Provides temporary backup power
Answer: D. Provides temporary backup power. A UPS can supply temporary battery power when mains power is interrupted.
What is a surge protector designed to reduce?
A Voltage spikes reaching equipment
B Hard drive fragmentation
C Monitor refresh rate
D Keyboard latency
Answer: A. Voltage spikes reaching equipment. A surge protector helps limit damaging voltage surges reaching connected equipment.
What does a motherboard coin-cell battery commonly maintain?
A GPU rendering speed
B Real-time clock settings
C SSD storage capacity
D Fan blade speed
Answer: B. Real-time clock settings. The motherboard battery typically maintains the real-time clock and certain firmware settings when the system is unplugged.
Why should computer parts be protected from electrostatic discharge?
A It can damage sensitive components
B It lowers display resolution
C It erases printed pages
D It increases fan noise
Answer: C. It erases printed pages. Electrostatic discharge can damage sensitive electronic components, so handling precautions matter.
Which cable carries SATA drive data to the motherboard?
A HDMI cable
B PCIe power lead
C Audio cable
D SATA data cable
Answer: D. SATA data cable. A SATA data cable connects a SATA drive to a motherboard SATA port.
What is one purpose of a laptop’s internal battery?
A Portable battery power
B Increase processor socket size
C Connect an Ethernet cable
D Store operating-system files
Answer: A. Portable battery power. The battery lets a laptop operate without being continuously connected to mains power.