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CNIT 176 1-15 MCQ newest exam (237 questions) with verified detailed solutions

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CNIT 176 1-15 MCQ newest exam (237 questions) with verified detailed solutions

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CNIT 176
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Institution
CNIT 176
Course
CNIT 176

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Uploaded on
May 8, 2025
Number of pages
54
Written in
2024/2025
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Exam (elaborations)
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CNIT 176 1-15 MCQ newest
exam with verified detailed
solutions

1. What is multiprogramming?
|||||| |||||| ||||||




A) Running multiple processors simultaneously
|||||| |||||| |||||| ||||||




B) Allocating memory to a single program
|||||| |||||| |||||| |||||| |||||| ||||||




C) Keeping multiple programs in main memory at the same time
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




D) Running a single program on multiple computers - Correct answer ✔C
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




2. What is a frame in memory management?
|||||| |||||| |||||| |||||| |||||| |||||| ||||||




A) A variable-sized portion of main memory
|||||| |||||| |||||| |||||| |||||| ||||||




B) A fixed size portion of main memory that holds a process page
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




C) A temporary storage for CPU instructions
|||||| |||||| |||||| |||||| |||||| ||||||




D) A graphical user interface component - Correct answer ✔B
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




3. What was the first operating system approach?
|||||| |||||| |||||| |||||| |||||| |||||| ||||||




A) Multiprogramming
||||||




B) Time-sharing
||||||




C) Real-time processing
|||||| ||||||




D) Batch processing - Correct answer ✔D
|||||| |||||| |||||| |||||| |||||| ||||||




4. What is a page in memory management?
|||||| |||||| |||||| |||||| |||||| |||||| ||||||

,A) A variable-sized portion of a process
|||||| |||||| |||||| |||||| |||||| ||||||




B) A fixed size portion of a process that is stored into a memory frame
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C) The entire memory allocated to a process
|||||| |||||| |||||| |||||| |||||| |||||| ||||||




D) A segment of the hard drive - Correct answer ✔B
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




5. What does time sharing in operating systems allow?
|||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




A) Multiple users to interact with a computer at the same time
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B) Only one user to interact with the computer at a time
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




C) Users to share physical hardware
|||||| |||||| |||||| |||||| ||||||




D) Only system processes to run simultaneously - Correct answer ✔A
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




6. What is swapping in memory management?
|||||| |||||| |||||| |||||| |||||| ||||||




A) The act of switching off the computer
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B) Switching tasks between different CPUs
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C) Transferring data between two hard drives
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D) The act of bringing in a page from secondary memory, often causing another page to be
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




written back to secondary memory - Correct answer ✔D
|||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




7. What is thrashing in memory management?
|||||| |||||| |||||| |||||| |||||| ||||||




A) Efficient processing of multiple pages
|||||| |||||| |||||| |||||| ||||||




B) Inefficient processing caused by constant page swaps
|||||| |||||| |||||| |||||| |||||| |||||| ||||||




C) Storing all pages in main memory
|||||| |||||| |||||| |||||| |||||| ||||||




D) Defragmenting the hard drive - Correct answer ✔B
|||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




8. How many programs are in memory in single contiguous memory management?
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




A) Only 1 program
|||||| |||||| ||||||




B) 2 programs - operating system and application program
|||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||

,C) Multiple programs in a queue
|||||| |||||| |||||| |||||| ||||||




D) No programs, only the operating system - Correct answer ✔A
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




9. What is a process control block (PCB)?
|||||| |||||| |||||| |||||| |||||| |||||| ||||||




A) A program loaded into memory
|||||| |||||| |||||| |||||| ||||||




B) A data structure used by the operating system to manage information about a process
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




C) A memory partition
|||||| |||||| ||||||




D) A hardware device driver - Correct answer ✔B
|||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




10. How is memory divided in fixed partitions?
|||||| |||||| |||||| |||||| |||||| |||||| ||||||




A) Dynamically as needed
|||||| |||||| ||||||




B) Into fixed number of partitions in which programs can be loaded
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




C) Into random segments
|||||| |||||| ||||||




D) By the user manually - Correct answer ✔B
|||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




11. What occurs during a context switch?
|||||| |||||| |||||| |||||| |||||| ||||||




A) The system shuts down
|||||| |||||| |||||| ||||||




B) The exchange of register information
|||||| |||||| |||||| |||||| ||||||




C) A new program is loaded
|||||| |||||| |||||| |||||| ||||||




D) The memory is cleared - Correct answer ✔B
|||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




12. In which scheduling algorithm are processes moved to the CPU in the order they arrive in
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




the running state?
|||||| ||||||




A) Shortest job next
|||||| |||||| ||||||




B) Round robin
|||||| ||||||




C) First come, first serve
|||||| |||||| |||||| ||||||




D) Preemptive scheduling - Correct answer ✔C
|||||| |||||| |||||| |||||| |||||| ||||||

, 13. In the shortest job next scheduling algorithm, which process is moved into the running
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




state first? ||||||




A) The process with the longest estimated running time
|||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




B) The process with the shortest estimated running time
|||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




C) The process with the highest priority
|||||| |||||| |||||| |||||| |||||| ||||||




D) The process that arrived first - Correct answer ✔B
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




14. How are partitions created in dynamic partition memory management?
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




A) As needed to fit the programs waiting to be loaded
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




B) At system startup
|||||| |||||| ||||||




C) Only once when the system is installed
|||||| |||||| |||||| |||||| |||||| |||||| ||||||




D) By the user manually - Correct answer ✔A
|||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




15. In non-preemptive scheduling, when does the currently executing process give up the
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




CPU?
A) Voluntarily
||||||




B) When the system decides
|||||| |||||| |||||| ||||||




C) At a fixed time interval
|||||| |||||| |||||| |||||| ||||||




D) When a higher priority process arrives - Correct answer ✔A
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




16. In preemptive scheduling, who decides to favor another process?
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




A) The user
|||||| ||||||




B) The currently executing process
|||||| |||||| |||||| ||||||




C) The operating system
|||||| |||||| ||||||




D) The hardware - Correct answer ✔C
|||||| |||||| |||||| |||||| |||||| ||||||




17. What is turnaround time in process scheduling?
|||||| |||||| |||||| |||||| |||||| |||||| ||||||

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