Operating systems concept MCQ Test 45

By | October 3, 2017

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

Question 1 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
I/O modules performs requested action on
A
Programmed I/O
B
Direct Memory Access (DMA)
C
Interrupt driven I/O
D
I/O devices
Question 2 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
In a particular Unix OS, each data block is of size 1024 bytes, each node has 10 direct data block addresses and three additional addresses: one for single indirect block, one for double indirect block and one for triple indirect block. Also, each block can contain addresses for 128 blocks. Which one of the following is approximately the maximum size of a file in the file system?
A
512 MB
B
2GB
C
8GB
D
16GB
Question 3 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
In processes, access control implements a
A
Security Policy
B
Access Policy
C
Control Policy
D
Check Policy
Question 4 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
The second set of the three permissions (r-) indicates that
A
group has read permission only
B
other has read permission only
C
owner has read permission only
D
group has write permission only
Question 5 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
In asymmetric encryption
A
same key is used for encryption and decryption
B
different keys are used encryption and decryption
C
no key is required for encryption and decryption
D
none of the mentioned
Question 6 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
The buffers statement is found in what file?
A
Config.sys
B
Autoexec.ncf
C
Autoexec.bat
D
Neb.cfg
Question 7 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
A process can map any of its pages into the address space of another
A
Process
B
Program
C
System
D
Application
Question 8 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
The.......... table contains the base address of each page in physical memory.
A
process
B
memory
C
page
D
frame
Question 9 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
Linux address space defines virtual address space that is assigned to
A
Processor
B
Process
C
Main Memory
D
Virtual Memory
Question 10 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
Multiple threads within the same process may be allocated to separate
A
Applications
B
Programs
C
Processors
D
Processes
Question 11 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
What is the name of the technique in which the operating system of a computer executes several programs concurrently by switching back and forth between them?
A
Partitioning
B
Multitasking
C
Windowing
D
Paging
Question 12 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
Round-robin scheduling
A
allows interactive tasks quicker access to the processor
B
is quite complex to implement
C
gives each task the same chance at the processor
D
allows processor-bound tasks more time in the processor
Question 13 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
The wait operation of the semaphore basically works on the basic.......... system call.
A
stop()
B
block()
C
hold()
D
wait()
Question 14 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
In the two level directory structure:
A
each user has his/her own user file directory
B
the system doesn't its own master file directory
C
all of the mentioned
D
none of the mentioned
Question 15 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
Which of the following file names are invalid in MSDOS?
A
MYFILE.DOS
B
CHECK$.(1)
C
Verified.###
D
Qwerty.1?3
Question 16 (Click on any option to know correct answer. सही उत्तर जानने के लिए किसी भी choice पर क्लिक करें।)
Earliest deadline first algorithm assigns priorities according to:
A
periods
B
deadlines
C
burst times
D
none of the mentioned
There are 16 questions to complete.

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