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21. RTOS stands for ____
A. Real – Time Operating System
B. Reliable Time Operating System
C. Reboot Time Operating System
D. None of the above
ANSWER:A
SOLUTION : RTOS stands for Real-Time Operating System. RTOS is a specialized operating system that handles time-critical tasks with precision and efficiency.
22. Which of the following terms explains the execution of more than one file at the same on a single processor?
A. Single tasking
B. Multi tasking
C. Time tracing
D. Multi processing
ANSWER: B
SOLUTION:multitasking, the running of multiple programs (sets of instructions) in one computer at the same time. Multitasking is used to keep all of a computer’s resources at work as much of the time as possible. I
23. Which of the following refers to the means by which an OS or any other program interacts with the user?
A. Program front-end
B. Programming interface
C. User interface
D. User compatibility
ANSWER:C
SOLUTION:The user interface (UI) is the way a user interacts with an operating system (OS) or other program.
24. ____ only uses text types one after another just as commands used in MS-DOS.
A. CUI
B. CLI
C. Both a and b
D. GUI
ANSWER:A
SOLUTION:Character User Interface (CUI) is a user interface that uses text types one after another, just like commands used in MS-DOS.
25. What happens when you boot up a PC?
A. Portions of the operating system are copied from disk into memory
B. Portions of the operating system are copied from memory onto disk.
C. Portions of the operating system are complied memory
D. The PC gets switched off
ANSWER:A
SOLUTION:When you boot up a PC, portions of the operating system (OS) are copied from disk into memory, which is known as the RAM (random access memory).
26. Restart of computer is called ____ when computer is already ON.
A. Cold booting
B. Warm booting
C. Shut down
D. Logging off
ANSWER: B
SOLUTION:Warm boot refers to restarting a computer that is already turned on via the operating system.
27. Windows, UNIX & LINUX are called ___
A. Application
B. Operating System
C. Hardware
D. Device driver
ANSWER: B
SOLUTION: Windows, UNIX, and Linux are all operating systems. An operating system (OS) acts as an interface between the computer’s hardware and the user. It also provides networking, file management, and hardware support.
28. In DOS, the DIR command is used to__ ___
A. Display content of a file
B. Delete file
C. Display list of files and subdirectories
D. Copy files
ANSWER:C
SOLUTION: The DIR command is used to display a list of files and subdirectories in a directory.
29. DEL command is used to ______.
A. Delete files
B. Delete directory
C. Delete labels
D. Both A and B
ANSWER: D
SOLUTION:The del command is used to delete one or more files or directories from a file system.