Deck 21: Linux Kernel and System Structures

Question 1

A block device transfers___________

A)bytes one by one
B)block of bytes as a unit
C)with unpredictable response times
D)none of the mentioned

Answer 1

block of bytes as a unit

Question 2

What is a dedicated device?

A)opposite to a sharable device
B)same as a sharable device
C)can be used concurrently by several processes
D)none of the mentioned

Answer 2

opposite to a sharable device

Question 3

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

A)block stream
B)set of blocks
C)character stream
D)none of the mentioned

Answer 3

character stream

Question 4

In polling___________

A)busy - wait cycles wait for i/o from device
B)interrupt handler receives interrupts
C)interrupt-request line is triggered by i/o device
D)all of the mentioned

Question 5

A non blocking system call

A)halts the execution of the application for an extended time
B)does not halt the execution of the application
C)does not block the interrupts
D)none of the mentioned

Question 6

An asynchronous call___________

A)returns immediately, without waiting for the i/o to complete
B)does not return immediately and waits for the i/o to complete
C)consumes a lot of time
D)is too slow

Question 7

Buffering is done to___________

A)cope with device speed mismatch
B)cope with device transfer size mismatch
C)maintain copy semantics
D)all of the mentioned

Question 8

Caching is___________  spooling.

A)same as
B)not the same as
C)all of the mentioned
D)none of the mentioned

Question 9

Caching___________

A)holds a copy of the data
B)is fast memory
C)holds the only copy of the data
D)holds output for a device

Question 10

Spooling___________

A)holds a copy of the data
B)is fast memory
C)holds the only copy of the data
D)holds output for a device

Question 11

The___________  keeps state information about the use of I/O components.

A)cpu
B)os
C)kernel
D)shell

Question 12

The kernel data structures include

A)process table
B)open file table
C)close file table
D)all of the mentioned

Question 13

If the number of cycles spent busy - waiting is not excessive, then___________

A)interrupt driven i/o is more efficient than programmed i/o
B)programmed i/o is more efficient than interrupt driven i/o
C)both programmed and interrupt driven i/o are equally efficient
D)none of the mentioned

Question 14

A___________  is a full duplex connection between a device driver and a user level process.

A)bus
B)i/o operation
C)stream
D)flow

Question 15

The first linux kernel which supports the SMP hardware?

A)linux 0.1
B)linux 1.0
C)linux 1.2
D)linux 2.0

Question 16

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

A)ext2
B)ext3
C)ext4
D)none of the mentioned

Question 17

Which binary format is supported by linux?

A)a.out
B)elf
C)both a.out and elf
D)none of the mentioned

Question 18

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

A)grub
B)lilo
C)ntldr
D)none of the mentioned

Question 19

The first process launched by the linux kernel is___________        

A)init process
B)zombie process
C)batch process
D)boot process

Question 20

Which desktop environment is not used in any linux distribution?

A)gnome
B)kde
C)unity
D)none of the mentioned

Question 21

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

A)system libraries
B)kernel code
C)compilers
D)utility programs

Question 22

Which one of the following is not a linux distribution?

A)debian
B)gentoo
C)open suse
D)multics

Question 23

Which one of the following is not shared by threads?

A)program counter
B)stack
C)both program counter and stack
D)none of the mentioned

Question 24

A process can be___________        

A)single threaded
B)multithreaded
C)both single threaded and multithreaded
D)none of the mentioned