D386 Hardware & Operating Systems wgu 2026
1. Which component is considered the brain of the computer?
Correct detailed answer 100% : CPU (Central Processing Unit)
Rationale: The CPU processes instructions and performs calculations,
controlling all operations.
2. What type of memory is volatile and loses data when power is off?
Correct detailed answer 100% : RAM (Random Access Memory)
Rationale: RAM stores temporary data for active processes and is
cleared on shutdown.
3. Which storage device uses flash memory and has no moving parts?
Correct detailed answer 100% : SSD (Solid State Drive)
Rationale: SSDs are faster and more durable than traditional hard drives
because they have no mechanical components.
4. What is the primary function of a motherboard?
Correct detailed answer 100% : Connects and allows communication
between all computer components
Rationale: The motherboard houses the CPU, memory, expansion slots,
and interfaces for peripherals.
5. Which device is responsible for converting digital signals into video
output?
Correct detailed answer 100% : GPU (Graphics Processing Unit)
Rationale: The GPU handles rendering of images, video, and graphics
tasks.
6. Which type of power supply converts AC to DC for computer
components?
, Correct detailed answer 100% : Switching Power Supply (PSU)
Rationale: Computer components require DC power; the PSU converts
and regulates it.
7. Which type of storage is best suited for backup and archival purposes?
Correct detailed answer 100% : HDD (Hard Disk Drive)
Rationale: HDDs provide large capacity at lower cost, suitable for
longterm storage.
8. What is the primary purpose of BIOS/UEFI?
Correct detailed answer 100% : Initialize hardware and boot the
operating system Rationale: BIOS/UEFI provides low-level control for
starting the computer and hardware configuration.
9. Which operating system type is designed to support multiple users
simultaneously? Correct detailed answer 100% : Server OS
Rationale: Server OS like Windows Server or Linux can manage
multiple users and network resources.
10. What is virtual memory used for?
Correct detailed answer 100% : Extending RAM using disk space to
manage larger workloads
Rationale: Virtual memory allows the OS to handle more processes than
physical RAM alone.
11. Which command-line utility lists all active processes in Windows?
Correct detailed answer 100% : tasklist
Rationale: tasklist provides detailed information about running
processes.
12. What does RAID 1 provide?
Correct detailed answer 100% : Mirroring for redundancy
Rationale: RAID 1 duplicates data on two drives to prevent data loss if
one fails.
1. Which component is considered the brain of the computer?
Correct detailed answer 100% : CPU (Central Processing Unit)
Rationale: The CPU processes instructions and performs calculations,
controlling all operations.
2. What type of memory is volatile and loses data when power is off?
Correct detailed answer 100% : RAM (Random Access Memory)
Rationale: RAM stores temporary data for active processes and is
cleared on shutdown.
3. Which storage device uses flash memory and has no moving parts?
Correct detailed answer 100% : SSD (Solid State Drive)
Rationale: SSDs are faster and more durable than traditional hard drives
because they have no mechanical components.
4. What is the primary function of a motherboard?
Correct detailed answer 100% : Connects and allows communication
between all computer components
Rationale: The motherboard houses the CPU, memory, expansion slots,
and interfaces for peripherals.
5. Which device is responsible for converting digital signals into video
output?
Correct detailed answer 100% : GPU (Graphics Processing Unit)
Rationale: The GPU handles rendering of images, video, and graphics
tasks.
6. Which type of power supply converts AC to DC for computer
components?
, Correct detailed answer 100% : Switching Power Supply (PSU)
Rationale: Computer components require DC power; the PSU converts
and regulates it.
7. Which type of storage is best suited for backup and archival purposes?
Correct detailed answer 100% : HDD (Hard Disk Drive)
Rationale: HDDs provide large capacity at lower cost, suitable for
longterm storage.
8. What is the primary purpose of BIOS/UEFI?
Correct detailed answer 100% : Initialize hardware and boot the
operating system Rationale: BIOS/UEFI provides low-level control for
starting the computer and hardware configuration.
9. Which operating system type is designed to support multiple users
simultaneously? Correct detailed answer 100% : Server OS
Rationale: Server OS like Windows Server or Linux can manage
multiple users and network resources.
10. What is virtual memory used for?
Correct detailed answer 100% : Extending RAM using disk space to
manage larger workloads
Rationale: Virtual memory allows the OS to handle more processes than
physical RAM alone.
11. Which command-line utility lists all active processes in Windows?
Correct detailed answer 100% : tasklist
Rationale: tasklist provides detailed information about running
processes.
12. What does RAID 1 provide?
Correct detailed answer 100% : Mirroring for redundancy
Rationale: RAID 1 duplicates data on two drives to prevent data loss if
one fails.
