OPERATING SYSTEM SOLVED MCQS

1) Memory protection is normally done by the 
 A. Processor and the associated hardware
 B. Operating system
 C. Compiler
 D. User program
 Ans:- A

2) The file structure that redefines its first record at a base of zero uses the term 
 A. Relative organization
 B. Key fielding
 C. Dynamic reallocation
 D. Hashing
Ans:- A

3) The scheduling in which CPU is allocated to the process with least CPU-burst time is called 
 A. Priority Scheduling
 B. Shortest job first Scheduling
 C. Round Robin Scheduling
 D. Multilevel Queue Scheduling
Ans:-B

4) The data block of a very large file in the UNIX file system are allocated using 
 A. Contiguous allocation
 B. Linked allocation
 C. Indexed allocation
 D. An extension of indexed allocation
Ans:-D

5) Best method for allocation is 
 A. Contiguous
 B. Linked
 C. Index
 D. All of these
Ans:-B

6) Which of the following scheduling policy is well suited for time shared operating system? 
 A. Shortest job first
 B. Round robin
 C. First com first serve
 D. Elevator
Ans:-B

7) Global locks 
 A. Synchronize access to local resources
 B. Synchronize access to global resources
 C. Are used to avoid local locks
 D. Prevent access to global resources
Ans:-B

8) A static partitioned memory management system has a total of six partitions. If one is allocated to the operating system, this will allow a total of 
 A. Five user jobs
 B. Six user jobs
 C. Thirty-two user jobs
 D. Thirty-six user jobs
Ans:-A

9) Cooperating processes can 
 A. Only share a logical address space directly that is, both code and data
 B. Access concurrently to shared data may result in data consistency
 C. Either directly share a logical address space or be allowed to share data only through files or messages
 D. None of these responses are correct
Ans:-C

10) Time sharing provides 
 A. Disk management
 B. File system management
 C. Concurrent execution
 D. All of the above
Ans:-  D