OPERATING SYSTEM MCQS PART 05

OPERATING SYSTEM MCQS PART 05

1. The following features are needed to implement top down parsing
(A) Source string marker           
(B) Prediction making mechanism
(C) Matching and Backtracking mechanism         
(D) All of the above
Ans: (D)

2. A macro definition consists of
(A) A macro prototype statement   
(B) One or more model statements
(C) Macro pre-processor statements         
(D) All of the above
Ans: (D)

3. The main reason to encrypt a file is to _________.
(A) Reduce its size               
(B) Secure it for transmission
(C) Prepare it for backup            
(D) Include it in the start-up sequence
Ans: (B)
4. Which of the following is not a key piece of information, stored in single page table entry, assuming pure paging and virtual memory
(A) Frame number
(B) A bit indicating whether the page is in physical memory or on the disk
(C) A reference for the disk block that stores the page 
(D) None of the above
Ans: (C)

5. A UNIX device driver is
(A) Structured into two halves called top half and bottom half
(B) Three equal partitions      
(C) Unstructured     
(D) None of the above
Ans: (A)

6. The following is not a layer of IO management module
(A) PIOCS (Physical Input Output Control System)
(B) LIOCS (Logical Input Output Control System)
(C) FS (File System)         
(D) MCS (Management Control System)
Ans: (D)

7. Which amongst the following is not a valid page replacement policy?
(A) LRU policy (Least Recently Used)     
(B) FIFO policy (First in first out)
(C) RU policy (Recurrently used)       
(D) Optimal page replacement policy
Ans: (C)

8. Consider a program with a linked origin of 5000. Let the memory area allocated to it have the start address of 70000. Which amongst the following will be the value to be loaded in relocation register?
(A) 20000          
(B) 50000        
(C) 70000                
(D) 90000
(E) None
Ans: (E)

9. An assembly language is a
(A) low level programming language
(B) Middle level programming language
(C) High level programming language
(D) Internet based programming language
Ans: (A)

10. TII stands for
(A) Table of incomplete instructions  
(B) table of information instructions
(C) translation of instructions information
(D) translation of information instruction
Ans: (A)