WGU D316 IT Foundations OA (pdf) | 2026/2027 | Objective
Assessment | IT Fundamentals
1. Which internal component is specifically responsible for executing
instructions and performing arithmetic calculations?
A) RAM (Random Access Memory)
B) HDD (Hard Disk Drive)
C) CPU (Central Processing Unit)
D) GPU (Graphics Processing Unit)
Correct Answer: CPU (Central Processing Unit)
Rationale: The CPU is the "brain" of the computer, handling the fetch-
decode-execute cycle. RAM stores temporary data, HDD provides permanent
storage, and the GPU handles graphics rendering. The CPU performs the core
arithmetic and logic operations that drive all computing tasks.
2. A technician notices a workstation requires frequent hard drive activity
(thrashing) even when only a web browser is open. What is the most likely
hardware bottleneck?
A) Insufficient CPU clock speed
B) Insufficient RAM
C) Slow hard drive RPM
D) Outdated GPU drivers
Correct Answer: Insufficient RAM
Rationale: Disk thrashing occurs when the system runs out of RAM and uses
the hard drive as "virtual memory." Adding more RAM reduces reliance on the
page file and eliminates the excessive disk activity caused by memory
swapping.
,3. Which storage device type contains no moving parts and uses NAND flash
memory?
A) Hard Disk Drive (HDD)
B) Solid State Drive (SSD)
C) Optical Drive
D) Tape Drive
Correct Answer: Solid State Drive (SSD)
Rationale: SSDs use NAND flash memory with no moving mechanical parts,
offering faster read/write speeds and greater durability than traditional
HDDs, which rely on spinning platters and moving read/write heads.
4. What is the function of a power supply unit (PSU) in a computer?
A) To store data permanently
B) To convert AC power to DC power
C) To execute program instructions
D) To manage network connections
Correct Answer: To convert AC power to DC power
Rationale: The PSU converts alternating current (AC) from a wall outlet into
direct current (DC) at the voltages required by computer components. Most
PSUs have dual-voltage auto-switching capabilities.
5. Which motherboard form factor is most commonly used in standard
desktop computers?
A) Mini-ITX
,B) Micro-ATX
C) ATX
D) E-ATX
Correct Answer: ATX
Rationale: ATX (Advanced Technology Extended) is the most common
motherboard form factor for standard desktop computers. Micro-ATX is
smaller, Mini-ITX is even smaller, and E-ATX is larger.
6. What type of memory module is used to install system memory in a
desktop motherboard?
A) SIMM
B) DIMM
C) SO-DIMM
D) RIMM
Correct Answer: DIMM
Rationale: DIMM (Dual Inline Memory Module) is the standard memory
module used in desktop motherboards. SO-DIMM is used in laptops, and
SIMM and RIMM are older, obsolete formats.
7. What is the maximum number of storage devices that can be attached to
a single SATA port?
A) 1
B) 2
C) 4
D) 8
, Correct Answer: 1
Rationale: A single SATA port supports only one storage device. To connect
multiple drives, a motherboard must have multiple SATA ports or use a SATA
port multiplier.
8. Which type of RAM synchronizes its speed with the motherboard system
clock?
A) DRAM
B) SDRAM
C) SRAM
D) VRAM
Correct Answer: SDRAM
Rationale: Synchronous DRAM (SDRAM) synchronizes its operations with the
motherboard system clock, allowing it to run faster and more efficiently than
asynchronous DRAM.
9. What is the primary advantage of Double Data Rate SDRAM (DDR SDRAM)
over standard SDRAM?
A) Lower power consumption
B) Two data transfers per clock cycle
C) Larger physical size
D) Compatibility with older motherboards
Correct Answer: Two data transfers per clock cycle
Assessment | IT Fundamentals
1. Which internal component is specifically responsible for executing
instructions and performing arithmetic calculations?
A) RAM (Random Access Memory)
B) HDD (Hard Disk Drive)
C) CPU (Central Processing Unit)
D) GPU (Graphics Processing Unit)
Correct Answer: CPU (Central Processing Unit)
Rationale: The CPU is the "brain" of the computer, handling the fetch-
decode-execute cycle. RAM stores temporary data, HDD provides permanent
storage, and the GPU handles graphics rendering. The CPU performs the core
arithmetic and logic operations that drive all computing tasks.
2. A technician notices a workstation requires frequent hard drive activity
(thrashing) even when only a web browser is open. What is the most likely
hardware bottleneck?
A) Insufficient CPU clock speed
B) Insufficient RAM
C) Slow hard drive RPM
D) Outdated GPU drivers
Correct Answer: Insufficient RAM
Rationale: Disk thrashing occurs when the system runs out of RAM and uses
the hard drive as "virtual memory." Adding more RAM reduces reliance on the
page file and eliminates the excessive disk activity caused by memory
swapping.
,3. Which storage device type contains no moving parts and uses NAND flash
memory?
A) Hard Disk Drive (HDD)
B) Solid State Drive (SSD)
C) Optical Drive
D) Tape Drive
Correct Answer: Solid State Drive (SSD)
Rationale: SSDs use NAND flash memory with no moving mechanical parts,
offering faster read/write speeds and greater durability than traditional
HDDs, which rely on spinning platters and moving read/write heads.
4. What is the function of a power supply unit (PSU) in a computer?
A) To store data permanently
B) To convert AC power to DC power
C) To execute program instructions
D) To manage network connections
Correct Answer: To convert AC power to DC power
Rationale: The PSU converts alternating current (AC) from a wall outlet into
direct current (DC) at the voltages required by computer components. Most
PSUs have dual-voltage auto-switching capabilities.
5. Which motherboard form factor is most commonly used in standard
desktop computers?
A) Mini-ITX
,B) Micro-ATX
C) ATX
D) E-ATX
Correct Answer: ATX
Rationale: ATX (Advanced Technology Extended) is the most common
motherboard form factor for standard desktop computers. Micro-ATX is
smaller, Mini-ITX is even smaller, and E-ATX is larger.
6. What type of memory module is used to install system memory in a
desktop motherboard?
A) SIMM
B) DIMM
C) SO-DIMM
D) RIMM
Correct Answer: DIMM
Rationale: DIMM (Dual Inline Memory Module) is the standard memory
module used in desktop motherboards. SO-DIMM is used in laptops, and
SIMM and RIMM are older, obsolete formats.
7. What is the maximum number of storage devices that can be attached to
a single SATA port?
A) 1
B) 2
C) 4
D) 8
, Correct Answer: 1
Rationale: A single SATA port supports only one storage device. To connect
multiple drives, a motherboard must have multiple SATA ports or use a SATA
port multiplier.
8. Which type of RAM synchronizes its speed with the motherboard system
clock?
A) DRAM
B) SDRAM
C) SRAM
D) VRAM
Correct Answer: SDRAM
Rationale: Synchronous DRAM (SDRAM) synchronizes its operations with the
motherboard system clock, allowing it to run faster and more efficiently than
asynchronous DRAM.
9. What is the primary advantage of Double Data Rate SDRAM (DDR SDRAM)
over standard SDRAM?
A) Lower power consumption
B) Two data transfers per clock cycle
C) Larger physical size
D) Compatibility with older motherboards
Correct Answer: Two data transfers per clock cycle
