Operating systems concept MCQ Test 33

By | October 3, 2017

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

Question 1
Command set which is correct according to its function is
A
RD and MD
B
DEL and ERASE
C
CD and RD
D
COPY and RENAME
Question 2
A process that is based on IPC mechanism which executes on different systems and can communicate with other processes using message based communication, is called.....
A
Local Procedure Call
B
Inter Process Communication
C
Remote Procedure Call
D
Remote Machine Invocation
Question 3
With the use of multiprogramming batch processing work can be
A
Efficient
B
Rigid
C
Expensive
D
Flexible
Question 4
What is meaning of right-set?
A
It is a subset consist of read and write
B
It is a subset of all valid operations that can be performed on the object
C
It is a subset consist of read, write and execute
D
None of the mentioned
Question 5
A useful tool in characterizing and allocating of resources to process is the
A
User Allocation Graph
B
Time Allocation Graph
C
Resource Allocation Graph
D
Location Allocation Graph
Question 6
Which of the following is default mode for Windows to start?
A
Command Prompt
B
Safe Mode
C
Normal Mode
D
None of above
Question 7
What script is run for setting bash global defaults for all users?
A
/etc/.profile
B
/etc/.bashrc
C
/etc/.log
D
/etc/profile
Question 8
Device controller is the controller of the computer system that contains
A
buffers
B
registers
C
cache
D
both A and B
Question 9
For improving performance of the computer system memory used is
A
RAM
B
ROM
C
cache
D
cd
Question 10
Network between computers and terminal is considered as requirement of
A
set of software
B
process steps
C
hardware requirement
D
communication network
Question 11
An interrupt occurs when the timer count reaches to
A
0
B
1
C
2
D
3
Question 12
A Computer system implements 8 kilobyte pages and a 32-bit physical address space. Each page table entry contains a valid bit, a dirty bit three permission bits, and the translation. If the maximum size of the page table of a process is 24 megabytes, the length of the virtual address supported by the system is.......... bits.
A
36
B
32
C
28
D
40
Question 13
In DOS, the maximum length of filename is
A
5
B
8
C
11
D
10
Question 14
The child process completes execution, but the parent keeps executing, then the child process is known as:
A
Orphan
B
Zombie
C
Body
D
Dead
Question 15
With 64 bit virtual addresses, a 4KB page and 256 MB of RAM, an inverted page table requires:
A
8192 entries
B
16384 entries
C
32768 entries
D
65536 entries
Question 16
Consider a uniprocessor system executing three tasks T1, T2 and T3, each of which is composed of an infinite sequence of jobs (or instances) which arrive periodically at intervals of 3, 7 and 20 milliseconds, respectively. The priority of each task is the inverse of its period and the available tasks are scheduled in order of priority, with the highest priority task scheduled first. Each instance of T1, T2 and T3 requires an execution time of 1, 2 and 4 milliseconds, respectively. Given that all tasks initially arrive at the beginning of the 1st milliseconds and task preemptions are allowed, the first instance of T3 completes its execution at the end of.......... milliseconds.
A
5
B
10
C
12
D
15
There are 16 questions to complete.

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