WGU D075 Objective Assessment Exam 2026 –
300 Verified Questions & Detailed Answers |
Latest Updated Test Bank + Complete Study
Guide
WGU D075 – IT Foundations Objective Assessment Exam 2026
300 Verified Questions & Detailed Answers | Complete Study Guide
Question 1 What is the primary function of an operating system?
A. To provide internet connectivity
B. To manage hardware and software resources
C. To store user files permanently
D. To execute application software only
E. To provide antivirus protection
CORRECT ANSWER: B. To manage hardware and software resources
RATIONALE: An operating system (OS) acts as an intermediary between users and
computer hardware. It manages CPU scheduling, memory allocation, file systems,
input/output devices, and provides a platform for application software to run. Without an
OS, software applications cannot communicate with hardware components effectively.
Question 2 Which of the following best describes RAM?
A. A permanent storage device for the operating system
B. A type of read-only memory used to boot the system
C. Temporary memory used to store data currently being processed
D. A long-term storage medium for files and applications
E. A graphics processing component
CORRECT ANSWER: C. Temporary memory used to store data currently being
processed
RATIONALE: RAM (Random Access Memory) is volatile memory, meaning its
contents are lost when the computer is powered off. It temporarily holds data and
,instructions that the CPU is actively using, making it critical for system performance.
More RAM generally allows more applications to run simultaneously without slowdown.
Question 3 What does the term "bandwidth" refer to in networking?
A. The physical length of a network cable
B. The number of devices connected to a network
C. The maximum data transfer rate of a network connection
D. The security protocol used in a network
E. The distance between two network nodes
CORRECT ANSWER: C. The maximum data transfer rate of a network
connection
RATIONALE: Bandwidth refers to the capacity of a network connection to transmit
data, typically measured in bits per second (bps), megabits per second (Mbps), or
gigabits per second (Gbps). Higher bandwidth allows more data to be transferred in a
given period, which is crucial for performance in high-traffic environments.
Question 4 Which component is considered the "brain" of the computer?
A. RAM
B. Hard Drive
C. Motherboard
D. CPU
E. GPU
CORRECT ANSWER: D. CPU
RATIONALE: The Central Processing Unit (CPU) is responsible for executing
instructions and performing calculations. It processes data from RAM, controls other
hardware components, and runs software programs. The CPU's speed (measured in
GHz) and number of cores significantly impact overall system performance.
Question 5 What is the purpose of a firewall in a network?
,A. To speed up internet connections
B. To monitor and control incoming and outgoing network traffic
C. To store backup copies of data
D. To compress network data for faster transmission
E. To assign IP addresses to devices
CORRECT ANSWER: B. To monitor and control incoming and outgoing
network traffic
RATIONALE: A firewall is a network security device or software that monitors and
filters traffic based on predefined security rules. It acts as a barrier between trusted
internal networks and untrusted external networks (like the internet), blocking
unauthorized access while allowing legitimate communication to pass through.
Question 6 Which of the following is an example of an input device?
A. Monitor
B. Printer
C. Speaker
D. Keyboard
E. Projector
CORRECT ANSWER: D. Keyboard
RATIONALE: Input devices allow users to enter data and commands into a
computer. A keyboard is a classic input device. Monitors, printers, speakers, and
projectors are output devices — they present processed information back to the user
rather than sending data into the system.
Question 7 What does "cloud computing" primarily refer to?
A. Storing data on local hard drives
B. Using physical servers in an office building
C. Delivering computing services over the internet
D. Installing software from a CD-ROM
, E. Connecting computers through Bluetooth
CORRECT ANSWER: C. Delivering computing services over the internet
RATIONALE: Cloud computing involves delivering services such as storage,
databases, networking, software, and analytics over the internet ("the cloud"). It enables
on-demand access to shared computing resources without requiring direct active
management by the user, offering scalability, flexibility, and cost efficiency.
Question 8 Which of the following best defines "software"?
A. Physical components of a computer system
B. The circuitry inside a computer
C. Programs and operating information used by a computer
D. The network cables connecting devices
E. The power supply unit of a computer
CORRECT ANSWER: C. Programs and operating information used by a
computer
RATIONALE: Software refers to the collection of programs, data, and instructions
that tell a computer how to perform tasks. It is intangible (unlike hardware) and includes
operating systems, application programs, and utilities. Software is the logical
component that drives hardware to perform desired operations.
Question 9 What is the function of a DNS server?
A. To encrypt internet traffic
B. To assign dynamic IP addresses to devices
C. To translate domain names into IP addresses
D. To block malicious websites
E. To increase network speed
CORRECT ANSWER: C. To translate domain names into IP addresses
RATIONALE: The Domain Name System (DNS) functions like the internet's
phonebook. When you type a website address (e.g., www.example.com), the DNS
300 Verified Questions & Detailed Answers |
Latest Updated Test Bank + Complete Study
Guide
WGU D075 – IT Foundations Objective Assessment Exam 2026
300 Verified Questions & Detailed Answers | Complete Study Guide
Question 1 What is the primary function of an operating system?
A. To provide internet connectivity
B. To manage hardware and software resources
C. To store user files permanently
D. To execute application software only
E. To provide antivirus protection
CORRECT ANSWER: B. To manage hardware and software resources
RATIONALE: An operating system (OS) acts as an intermediary between users and
computer hardware. It manages CPU scheduling, memory allocation, file systems,
input/output devices, and provides a platform for application software to run. Without an
OS, software applications cannot communicate with hardware components effectively.
Question 2 Which of the following best describes RAM?
A. A permanent storage device for the operating system
B. A type of read-only memory used to boot the system
C. Temporary memory used to store data currently being processed
D. A long-term storage medium for files and applications
E. A graphics processing component
CORRECT ANSWER: C. Temporary memory used to store data currently being
processed
RATIONALE: RAM (Random Access Memory) is volatile memory, meaning its
contents are lost when the computer is powered off. It temporarily holds data and
,instructions that the CPU is actively using, making it critical for system performance.
More RAM generally allows more applications to run simultaneously without slowdown.
Question 3 What does the term "bandwidth" refer to in networking?
A. The physical length of a network cable
B. The number of devices connected to a network
C. The maximum data transfer rate of a network connection
D. The security protocol used in a network
E. The distance between two network nodes
CORRECT ANSWER: C. The maximum data transfer rate of a network
connection
RATIONALE: Bandwidth refers to the capacity of a network connection to transmit
data, typically measured in bits per second (bps), megabits per second (Mbps), or
gigabits per second (Gbps). Higher bandwidth allows more data to be transferred in a
given period, which is crucial for performance in high-traffic environments.
Question 4 Which component is considered the "brain" of the computer?
A. RAM
B. Hard Drive
C. Motherboard
D. CPU
E. GPU
CORRECT ANSWER: D. CPU
RATIONALE: The Central Processing Unit (CPU) is responsible for executing
instructions and performing calculations. It processes data from RAM, controls other
hardware components, and runs software programs. The CPU's speed (measured in
GHz) and number of cores significantly impact overall system performance.
Question 5 What is the purpose of a firewall in a network?
,A. To speed up internet connections
B. To monitor and control incoming and outgoing network traffic
C. To store backup copies of data
D. To compress network data for faster transmission
E. To assign IP addresses to devices
CORRECT ANSWER: B. To monitor and control incoming and outgoing
network traffic
RATIONALE: A firewall is a network security device or software that monitors and
filters traffic based on predefined security rules. It acts as a barrier between trusted
internal networks and untrusted external networks (like the internet), blocking
unauthorized access while allowing legitimate communication to pass through.
Question 6 Which of the following is an example of an input device?
A. Monitor
B. Printer
C. Speaker
D. Keyboard
E. Projector
CORRECT ANSWER: D. Keyboard
RATIONALE: Input devices allow users to enter data and commands into a
computer. A keyboard is a classic input device. Monitors, printers, speakers, and
projectors are output devices — they present processed information back to the user
rather than sending data into the system.
Question 7 What does "cloud computing" primarily refer to?
A. Storing data on local hard drives
B. Using physical servers in an office building
C. Delivering computing services over the internet
D. Installing software from a CD-ROM
, E. Connecting computers through Bluetooth
CORRECT ANSWER: C. Delivering computing services over the internet
RATIONALE: Cloud computing involves delivering services such as storage,
databases, networking, software, and analytics over the internet ("the cloud"). It enables
on-demand access to shared computing resources without requiring direct active
management by the user, offering scalability, flexibility, and cost efficiency.
Question 8 Which of the following best defines "software"?
A. Physical components of a computer system
B. The circuitry inside a computer
C. Programs and operating information used by a computer
D. The network cables connecting devices
E. The power supply unit of a computer
CORRECT ANSWER: C. Programs and operating information used by a
computer
RATIONALE: Software refers to the collection of programs, data, and instructions
that tell a computer how to perform tasks. It is intangible (unlike hardware) and includes
operating systems, application programs, and utilities. Software is the logical
component that drives hardware to perform desired operations.
Question 9 What is the function of a DNS server?
A. To encrypt internet traffic
B. To assign dynamic IP addresses to devices
C. To translate domain names into IP addresses
D. To block malicious websites
E. To increase network speed
CORRECT ANSWER: C. To translate domain names into IP addresses
RATIONALE: The Domain Name System (DNS) functions like the internet's
phonebook. When you type a website address (e.g., www.example.com), the DNS
