MCQ on Computer Science Engineering
81- In real time operating system _____________
(A) process scheduling can be done only once
(B) all processes have the same priority
(C) kernel is not required
(D) a task must be serviced by its deadline period
82- The priority of a process will ______________ if the scheduler assigns it a static priority.
(A) depend on the operating system
(B) change
(C) remain unchanged
(D) none of the mentioned
83- The information about all files is kept in _____________
(A) operating system
(B) separate directory structure
(C) swap space
(D) none of the mentioned
84- What will happen in the single level directory?
(A) All files are contained in the same directory
(B) All files are contained in different directories all at the same level
(C) Depends on the operating system
(D) None of the mentioned
85- On systems where there are multiple operating system, the decision to load a particular one is done by _____________
(A) process control block
(B) file control block
(C) boot loader
(D) bootstrap
86- Semaphore is a/an _____________ to solve the critical section problem.
(A) hardware for a system
(B) special program for a system
(C) integer variable
(D) none of the mentioned
87- When will file system fragmentation occur?
(A) unused space or single file are not contiguous
(B) used space is not contiguous
(C) unused space is non-contiguous
(D) multiple files are non-contiguous
88- In operating system, each process has its own _____________
(A) open files
(B) pending alarms, signals, and signal handlers
(C) address space and global variables
(D) all of the mentioned
89- Hard real time operating system has _____________ jitter than a soft real time operating system.
(A) equal
(B) more
(C) less
(D) none of the mentioned
90- A deadlock avoidance algorithm dynamically examines the _____________ to ensure that a circular wait condition can never exist.
(A) operating system
(B) resources
(C) system storage state
(D) resource allocation state
91- The operating system keeps a small table containing information about all open files called _____________
(A) file table
(B) directory table
(C) open-file table
(D) system table
92- The _____________ program initializes all aspects of the system, from CPU registers to device controllers and the contents of main memory, and then starts the operating system.
(A) bootstrap
(B) main
(C) bootloader
(D) rom
93- In Unix, which system call creates the new process?
(A) create
(B) fork
(C) new
(D) none of the mentioned
94- The number of layers in ISO OSI reference model is _____________
(A) 5
(B) 7
(C) 6
(D) 10
95- Which of the following layers is an addition to OSI model when compared with TCP-IP model?
(A) Application layer
(B) Presentation layer
(C) Session layer
(D) Session and Presentation layer
96- The functionalities of the presentation layer include _____________
(A) Data compression
(B) Data encryption
(C) Data description
(D) All of the mentioned
97- TCP process may not write and read data at the same speed. So we need __________ for storage.
(A) Packets
(B) Buffers
(C) Segments
(D) Stacks
98- Which multiple access technique is used by IEEE 802.11 standard for wireless LAN?
(A) CDMA
(B) CSMA/CA
(C) ALOHA
(D) CSMA/CD
99- Mostly _____________ is used in wireless LAN.
(A) time division multiplexing
(B) orthogonal frequency division multiplexing
(C) space division multiplexing
(D) channel division multiplexing
100- Multiplexing is used in _____________
(A) Packet switching
(B) Circuit switching
(C) Data switching
(D) Packet & Circuit switching
ANSWERS:
81-(D), 82-(C), 83-(B), 84-(A), 85-(C), 86-(C), 87-(A), 88-(D), 89-(C), 90-(D), 91-(C), 92-(A), 93-(B), 94-(B), 95-(D), 96-(D), 97-(B), 98-(B), 99-(B), 100-(B)