WGU D293 Exam: Information Technology
Fundamentals 55 Questions and Answers (100%
Correct) | 2026/2027 Latest Version
Q1: What is the primary function of the CPU (Central
Processing Unit) in CORRECT ANSWER> computer?
A1: To execute instructions and process datCORRECT
ANSWER>. It acts as the "brain" of the computer,
performing mathematical, logical, and input/output
operations.
Q2: Which type of memory is volatile, meaning it loses its
contents when the power is turned off?
A2: RAM (Random Access Memory).
Q3: What is the fundamental difference between HDDs
(Hard Disk Drives) and SSDs (Solid State Drives)?
A3: HDDs use magnetic spinning disks to store
datCORRECT ANSWER>, making them slower and more
susceptible to physical damage. SSDs use flash memory
,with no moving parts, making them significantly faster
and more durable.
Q4: How does CORRECT ANSWER> switch differ from
CORRECT ANSWER> router in CORRECT ANSWER>
network?
A4: CORRECT ANSWER> switch connects devices within
CORRECT ANSWER> single local areCORRECT ANSWER>
network (LAN) and uses MAC addresses to forward
datCORRECT ANSWER> to the correct device. CORRECT
ANSWER> router connects multiple networks together
(e.g., CORRECT ANSWER> LAN to the Internet) and uses
IP addresses to determine the best path for datCORRECT
ANSWER>.
Q5: In the OSI model, which layer is responsible for
routing and IP addressing?
A5: Layer 3, the Network Layer.
, Q6: What is the binary representation of the decimal
number 15?
A6: 1111.
Q7: What is the primary purpose of an operating system
(OS)?
A7: To manage computer hardware, software resources,
and provide common services for computer programs. It
acts as an intermediary between users and the hardware.
Q8: What is the difference between TCP and UDP?
A8: TCP (Transmission Control Protocol) is connection-
oriented, ensuring reliable, ordered delivery of
datCORRECT ANSWER>. UDP (User Datagram Protocol) is
connectionless, offering faster but unreliable
datCORRECT ANSWER> delivery without guaranteeing
receipt.
Fundamentals 55 Questions and Answers (100%
Correct) | 2026/2027 Latest Version
Q1: What is the primary function of the CPU (Central
Processing Unit) in CORRECT ANSWER> computer?
A1: To execute instructions and process datCORRECT
ANSWER>. It acts as the "brain" of the computer,
performing mathematical, logical, and input/output
operations.
Q2: Which type of memory is volatile, meaning it loses its
contents when the power is turned off?
A2: RAM (Random Access Memory).
Q3: What is the fundamental difference between HDDs
(Hard Disk Drives) and SSDs (Solid State Drives)?
A3: HDDs use magnetic spinning disks to store
datCORRECT ANSWER>, making them slower and more
susceptible to physical damage. SSDs use flash memory
,with no moving parts, making them significantly faster
and more durable.
Q4: How does CORRECT ANSWER> switch differ from
CORRECT ANSWER> router in CORRECT ANSWER>
network?
A4: CORRECT ANSWER> switch connects devices within
CORRECT ANSWER> single local areCORRECT ANSWER>
network (LAN) and uses MAC addresses to forward
datCORRECT ANSWER> to the correct device. CORRECT
ANSWER> router connects multiple networks together
(e.g., CORRECT ANSWER> LAN to the Internet) and uses
IP addresses to determine the best path for datCORRECT
ANSWER>.
Q5: In the OSI model, which layer is responsible for
routing and IP addressing?
A5: Layer 3, the Network Layer.
, Q6: What is the binary representation of the decimal
number 15?
A6: 1111.
Q7: What is the primary purpose of an operating system
(OS)?
A7: To manage computer hardware, software resources,
and provide common services for computer programs. It
acts as an intermediary between users and the hardware.
Q8: What is the difference between TCP and UDP?
A8: TCP (Transmission Control Protocol) is connection-
oriented, ensuring reliable, ordered delivery of
datCORRECT ANSWER>. UDP (User Datagram Protocol) is
connectionless, offering faster but unreliable
datCORRECT ANSWER> delivery without guaranteeing
receipt.
