Operating System Multiple Choice Questions

By: Prof. Dr. Fazal Rehman | Last updated: May 30, 2025

1. Which one of the following resources are always protected by the operating system?
(A) CPU
(B) I/O
(C) Memory
(D) B and A

2. In which of the following multiplexing methods can resource management be done?
(A) Space division multiplexing
(B) Multiplexer
(C) Time-division multiplexing
(D) A and C

3. In the following software types, which one is used to simplify using systems software?
(A) Timesharing
(B) Operating environment
(C) Spreadsheet
(D) Multitasking

4. Where does the operating system keep information about files in a table?
(A) Directory Index Table
(B) File Allocation Table
(C) File Index Table
(D) File Folder Table

5. Which one of the following scheduling algorithms allocates the CPU first to the process that requests it first?
(A) Priority scheduling
(B) Shortest job scheduling
(C) First-come, first-served scheduling
(D) D and A

6. Where are Job Control Language (JCL) statements used?
(A) To specify the operating system, the beginning and end of a job in a batch
(B) Allocate the CPU to a job
(C) Read the input from the slow-speed card reader to the high-speed magnetic disk
(D) C and D

7. How can you define Time Quantum?
(A) The multilevel queue scheduling algorithm
(B) Priority scheduling algorithm
(C) Shortest job scheduling algorithm
(D) Round-robin scheduling algorithm

8. Which one of the following does not belong to Documentation?
(A) Documentation increases the maintenance time and cost
(B) The documentation gives a better understanding of the problem
(C) Documentation of a system should be as clear and direct as possible
(D) C and D

9. What does the Priority scheduling algorithm do?
(A) Equal priority processes cannot be scheduled
(B) CPU is allocated to the process with the lowest priority
(C) CPU is allocated to the process with the highest priority
(D) B and A

10. Which of the following belongs to Scheduling?
(A) Unrelated to performance consideration
(B) Not required in uniprocessor systems
(C) Allowing jobs to use the processor
(D) The same regardless of the purpose of the system

11. When is a system in a Safe-state?
(A) Safe sequence
(B) Safe allocation
(C) Safe resource
(D) C and D

12. How many processes are involved in the sharing of common data (Dekker’s algorithm implements mutual exclusion)?
(A) 4
(B) 12
(C) 1
(D) 2