OPERATING SYSTEMS FOR PROGRAMMERS
WGU C191 CERTIFICATION SCRIPT 2026
COMPREHENSIVE QUESTIONS AND
VERIFIED SOLUTIONS GRADED A+
⩥ A company requires a computing environment that supports high-
volume data processing and the management of a large amount of
storage.
Which computing environment should the company use?
Answer: Mainframe
⩥ What is an operating system (OS)?*
Answer: Software that runs on bare hardware
⩥ Which type of CPU instruction sets are supported by the CPU user
mode?
Answer: Only non-privileged
⩥ What are two locations where firmware can be stored?*
Answer: Read-only memory (ROM) and Flash memory
, ⩥ What is a system service?
Answer: An application included with an operating system to provide
functionality beyond the kernel
⩥ A company needs to determine when a computer experiences a
microprocessor interrupt that is the result of a division by zero.
Which operating system (OS) service should be used?
Answer: Error detection
⩥ Which interface allows combining multiple programs using the output
from one as the input to another?*
Answer: Command-line interface (CLI)
⩥ Which command is used to determine the number of lines in a file?*
Answer: wc
⩥ Which cyberattack prevents a legitimate user from accessing an
application in a timely manner?
Answer: Denial-of-service
⩥ Which operating environment is used to run an embedded system?
Answer: Real-time
WGU C191 CERTIFICATION SCRIPT 2026
COMPREHENSIVE QUESTIONS AND
VERIFIED SOLUTIONS GRADED A+
⩥ A company requires a computing environment that supports high-
volume data processing and the management of a large amount of
storage.
Which computing environment should the company use?
Answer: Mainframe
⩥ What is an operating system (OS)?*
Answer: Software that runs on bare hardware
⩥ Which type of CPU instruction sets are supported by the CPU user
mode?
Answer: Only non-privileged
⩥ What are two locations where firmware can be stored?*
Answer: Read-only memory (ROM) and Flash memory
, ⩥ What is a system service?
Answer: An application included with an operating system to provide
functionality beyond the kernel
⩥ A company needs to determine when a computer experiences a
microprocessor interrupt that is the result of a division by zero.
Which operating system (OS) service should be used?
Answer: Error detection
⩥ Which interface allows combining multiple programs using the output
from one as the input to another?*
Answer: Command-line interface (CLI)
⩥ Which command is used to determine the number of lines in a file?*
Answer: wc
⩥ Which cyberattack prevents a legitimate user from accessing an
application in a timely manner?
Answer: Denial-of-service
⩥ Which operating environment is used to run an embedded system?
Answer: Real-time
