Operating System Set 21

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This set of Operating System (OS) Multiple Choice Questions & Answers (MCQs) focuses on Operating System Set 21

Q1 | A block device transfers

bytes one by one

block of bytes as a unit

with unpredictable response times

none of the mentioned

Q2 | What is a dedicated device?

opposite to a sharable device

same as a sharable device

can be used concurrently by several processes

none of the mentioned

Q3 | A keyboard is an example of a device that is accessed through a interface.

block stream

set of blocks

character stream

none of the mentioned

Q4 | In polling

busy – wait cycles wait for i/o from device

interrupt handler receives interrupts

interrupt-request line is triggered by i/o device

all of the mentioned

Q5 | A non blocking system call

halts the execution of the application for an extended time

does not halt the execution of the application

does not block the interrupts

none of the mentioned

Q6 | An asynchronous call

returns immediately, without waiting for the i/o to complete

does not return immediately and waits for the i/o to complete

consumes a lot of time

is too slow

Q7 | Buffering is done to

cope with device speed mismatch

cope with device transfer size mismatch

maintain copy semantics

all of the mentioned

Q8 | Caching is spooling.

same as

not the same as

all of the mentioned

none of the mentioned

Q9 | Caching

holds a copy of the data

is fast memory

holds the only copy of the data

holds output for a device

Q10 | Spooling

holds a copy of the data

is fast memory

holds the only copy of the data

holds output for a device

Q11 | The keeps state information about the use of I/O components.

cpu

kernel

shell

Q12 | The kernel data structures include

process table

open file table

close file table

all of the mentioned

Q13 | If the number of cycles spent busy – waiting is not excessive, then

interrupt driven i/o is more efficient than programmed i/o

programmed i/o is more efficient than interrupt driven i/o

both programmed and interrupt driven i/o are equally efficient

none of the mentioned

Q14 | A is a full duplex connection between a device driver and a user level process.

bus

i/o operation

stream

flow

Q15 | The first linux kernel which supports the SMP hardware?

linux 0.1

linux 1.0

linux 1.2

linux 2.0

Q16 | Which one of the following linux file system does not support journaling feature?

ext2

ext3

ext4

none of the mentioned

Q17 | Which binary format is supported by linux?

a.out

elf

both a.out and elf

none of the mentioned

Q18 | Which one of the following bootloader is not used by linux?

grub

lilo

ntldr

none of the mentioned

Q19 | The first process launched by the linux kernel is

init process

zombie process

batch process

boot process

Q20 | Which desktop environment is not used in any linux distribution?

gnome

kde

unity

none of the mentioned

Q21 | Standard set of functions through which interacts with kernel is defined by

system libraries

kernel code

compilers

utility programs

Q22 | What is Linux?

single user, single tasking

single user, multitasking

multi user, single tasking

multi user, multitasking

Q23 | Which one of the following is not a linux distribution?

debian

gentoo

open suse

multics

Q24 | Which one of the following is not shared by threads?

program counter

stack

both program counter and stack

none of the mentioned

Q25 | A process can be

single threaded

multithreaded

both single threaded and multithreaded

none of the mentioned

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