# Operating systems concept MCQ Test 7

By | October 3, 2017

## UGC-NET/GATE Multiple Choice Questions for Operating System.

 Question 1
What TCP/IP protocol is used for remote terminal connection service?
 A UDP B RARP C FTP D TELNET
 Question 2
An instruction in a programming language that is replaced by a sequence of instructions prior to assembly or compiling is known as
 A procedure name B macro C label D literal
 Question 3
For how many processes which are sharing common data, the Dekker's algorithm implements mutual exclusion?
 A 1 B 2 C 3 D 4
 Question 4
A utility that can be used to minimize the number of fragmented files and enhance the speed
 A Disk space B Defrag C Scandisk D Double space
 Question 5
The scheme used in the above question is known as..... or.....
 A sector sparing & forwarding B forwarding & sector utilization C backwarding & forwarding D sector utilization & backwarding
 Question 6
The average time of service a page fault is 10ms and the time taken to access the memory is 1$\mu$s. A 99.99% hit ratio results in average memory their access time is..........
 A 1.9999$mu$s B 1.9999ms C 1ms D 9.99$\mu$s
 Question 7
.......... controls the way in which the computer system functions and provides a means by which users can interact with the computer
 A The platform B The operating system C Application software D The motherboard
 Question 8
Consider three processes, all arriving at time zero, with total execution time of 10, 20 and 30 units, respectively. Each process spends the first 20% of execution time doing I/O, the next 70% of time doing computation, and the last 10% of time doing I/O again. The operating system uses a shortest remaining compute time first scheduling algorithm and schedules a new process either when the running process gets blocked on I/O or when the running process finishes its compute burst. Assume that all I/O operations can be overlapped as much as possible. For what percentage of time does the CPU remain idle?
 A 0% B 10.6% C 30.00% D 89.40%
 Question 9
What are characteristics of Distributed Operating system?
 A Users are aware of multiplicity of machines B Access is done like local resources C Users are aware of multiplicity of machines D They have multiple zones to access files
 Question 10
Multithreading an interactive program will increase responsiveness to the user by:
 A continuing to run even if a part of it is blocked B waiting for one part to finish before the other begins C asking the user to decide the order of multithreading D none of the mentioned
 Question 11
The function of Dir/W is
 A Show all details of file B Show only file name and directory name C Shows only directory D All of the above
 Question 12
Choose the correct option regarding deadlock.
 A If a resource-allocation graph contains no cycles, then no process in the system is deadlocked. B If the graph does contain a cycle, then a deadlock may exist. C Only a D Both A and B are correct.
 Question 13
A process has been allocated 3 page frames. Assume that none of the pages of the process are available in the memory initially. The process makes the following sequence of page references (reference string): 1, 2, 1, 3, 7, 4, 5, 6, 3, 1 If optimal page replacement policy is used, how many page faults occur for the above reference string?
 A 7 B 8 C 9 D 10
 Question 14