MCQs on Computer Hardware

[Set - 4]

1. What is the function of the CMOS battery on a motherboard?

A) To power the CPU
B) To store the system’s BIOS settings
C) To cool the GPU
D) To enhance audio quality

Correct Answer: B) To store the system’s BIOS settings
Explanation: The CMOS battery powers the system’s BIOS settings, ensuring they are retained even when the computer is turned off.

2. Which type of memory is often used in cache memory for high-speed data access?

A) DRAM
B) SRAM
C) Flash Memory
D) EEPROM

Correct Answer: B) SRAM
Explanation: SRAM (Static Random Access Memory) is used in cache memory for its high-speed data access and low latency, making it ideal for storing frequently used instructions and data.

3. What is the purpose of using a dual-channel memory configuration in computers?

A) To double the storage capacity
B) To increase GPU performance
C) To reduce power consumption
D) To improve data transfer rates between RAM and CPU

Correct Answer: D) To improve data transfer rates between RAM and CPU
Explanation: Dual-channel memory configuration allows data to be transferred between RAM and the CPU on two channels simultaneously, improving overall system performance.

4. Which storage technology uses lasers to read and write data?

A) Magnetic Tape
B) Solid State Drive
C) Optical Disc
D) Hard Disk Drive

Correct Answer: C) Optical Disc
Explanation: Optical discs, such as CDs, DVDs, and Blu-rays, use lasers to read and write data on the disc surface.

5. Which feature of modern SSDs significantly improves their lifespan and performance?

A) Wear leveling
B) Overclocking
C) Defragmentation
D) RAID

Correct Answer: A) Wear leveling
Explanation: Wear leveling is a technique used in SSDs to distribute write and erase cycles evenly across the memory cells, extending the lifespan and maintaining performance.

6. Which component is used to secure expansion cards in place on a motherboard?

A) PCIe Slot
B) Standoffs
C) Retention Bracket
D) Northbridge Chip

Correct Answer: C) Retention Bracket
Explanation: Retention brackets are used to secure expansion cards, such as graphics cards, in place on the motherboard, preventing them from moving or becoming loose.

7. What is the main advantage of using a modular power supply in a computer build?

A) Increased power efficiency
B) Customizable cable management
C) Faster data transfer rates
D) Improved cooling performance

Correct Answer: B) Customizable cable management
Explanation: A modular power supply allows users to attach only the necessary cables, reducing clutter and improving airflow within the computer case.

8. Which type of port is used for connecting high-definition digital video and audio devices?

A) HDMI
B) DVI
C) VGA
D) Serial

Correct Answer: A) HDMI
Explanation: HDMI (High-Definition Multimedia Interface) ports are used to connect high-definition digital video and audio devices, such as monitors and TVs.

9. Which device is used to connect multiple computers to a single display?

A) KVM Switch
B) USB Hub
C) Router
D) Graphics Card

Correct Answer: A) KVM Switch
Explanation: A KVM switch (Keyboard, Video, Mouse) allows multiple computers to be connected to a single display, keyboard, and mouse, enabling control of several systems from one set of peripherals.

10. Which technology is commonly used to protect data stored on SSDs?

A) Defragmentation
B) Encryption
C) Disk Compression
D) Wear Leveling

Correct Answer: B) Encryption
Explanation: Encryption is commonly used to protect data stored on SSDs by converting it into a code that can only be accessed by authorized users, ensuring data security.

11. Which storage technology allows data to be read and written simultaneously across multiple drives?

A) RAID 0
B) RAID 1
C) RAID 5
D) RAID 10

Correct Answer: D) RAID 10
Explanation: RAID 10 combines the features of RAID 0 and RAID 1, allowing data to be read and written simultaneously across multiple drives, providing both speed and redundancy.

12. Which port is typically used for connecting an external hard drive to a computer?

A) USB
B) HDMI
C) Ethernet
D) VGA

Correct Answer: A) USB 
Explanation: USB ports are commonly used to connect external hard drives to computers, providing high-speed data transfer and easy connectivity.

13. Which component is used to protect a computer's power supply from voltage spikes?

A) UPS
B) Surge Protector
C) Voltage Regulator
D) Grounding Strap

Correct Answer: B) Surge Protector
Explanation: A surge protector safeguards a computer’s power supply from voltage spikes and surges, preventing potential damage to the internal components.

14. Which type of memory module is commonly used in laptops due to its small size?

A) DIMM
B) SIMM
C) SODIMM
D) RIMM

Correct Answer: C) SODIMM
Explanation: SODIMM (Small Outline Dual In-line Memory Module) is a compact memory module used in laptops, providing the same functionality as DIMM but in a smaller form factor.

15. Which component on the motherboard provides power to the BIOS and real-time clock?

A) CMOS Battery
B) PSU
C) Northbridge
D) Southbridge

Correct Answer: A) CMOS Battery
Explanation: The CMOS battery provides power to the BIOS firmware and real-time clock, ensuring that settings and time are maintained even when the computer is powered off.

16. Which technology allows multiple physical CPUs to be combined into a single virtual processor?

A) Hyper-Threading
B) Multiprocessing
C) Virtualization
D) Clustering

Correct Answer: C) Virtualization
Explanation: Virtualization technology allows multiple physical CPUs to be combined into a single virtual processor, enabling more efficient use of computing resources in virtual machines.

17. Which type of interface is used for connecting older hard drives and optical drives to a motherboard?

A) SATA
B) IDE
C) PCIe
D) M.2

Correct Answer: B) IDE
Explanation: IDE (Integrated Drive Electronics) is an older interface used for connecting hard drives and optical drives to a motherboard, replaced by SATA in modern systems.

18. Which component is responsible for managing data flow between the CPU, memory, and peripherals?

A) Southbridge
B) Northbridge
C) VRM
D) PSU

Correct Answer: B) Northbridge
Explanation: The Northbridge chip on a motherboard manages data flow between the CPU, memory, and high-speed peripherals, ensuring efficient communication within the system.

19. Which type of cooling system uses a liquid coolant to dissipate heat from the CPU or GPU?

A) Air Cooling
B) Liquid Cooling
C) Passive Cooling
D) Thermoelectric Cooling

Correct Answer: B) Liquid Cooling
Explanation: Liquid cooling systems use a liquid coolant to dissipate heat from the CPU or GPU, providing more efficient cooling compared to traditional air cooling systems.

20. Which technology is used to protect data on a hard drive by automatically detecting and correcting errors?

A) ECC Memory
B) RAID
C) SMART
D) Wear Leveling

Correct Answer: C) SMART
Explanation: SMART (Self-Monitoring, Analysis, and Reporting Technology) is used to detect and correct errors on a hard drive, helping to prevent data loss and prolong the drive’s lifespan.

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