Question 1

Suppose that a process is in "Blocked" state waiting for some I/O service. When the service is completed, it goes to the :

Accepted Answer

A)  running state
B)  ready state
C)  suspended state
D)  terminated state B

Question 2

What is a long-term scheduler ?

Accepted Answer

A)  it selects which process has to be brought into the ready queue
B)  it selects which process has to be executed next and allocates cpu
C)  it selects which process to remove from memory by swapping
D)  none of these A

Question 3

In a multi-programming environment :

Accepted Answer

A)  the processor executes more than one process at a time
B)  the programs are developed by more than one person
C)  more than one process resides in the memory
D)  a single user can execute many programs at the same time C

Question 4

When the process issues an I/O request :

Accepted Answer

A)  it is placed in an i/o queue
B)  it is placed in a waiting queue
C)  it is placed in the ready queue
D)  it is placed in the job queue

Question 5

The only state transition that is initiated by the user process itself is :

Accepted Answer

A)  block
B)  wakeup
C)  dispatch
D)  none of these

Question 6

If all processes I/O bound, the ready queue will almost always be ______, and the Short term Scheduler will have a ______ to do.

Accepted Answer

A)  full,little
B)  full,lot
C)  empty,little
D)  empty,lot

Question 7

The primary distinction between the short term scheduler and the long term scheduler is :

Accepted Answer

A)  the length of their queues
B)  the type of processes they schedule
C)  the frequency of their execution
D)  none of these

Question 8

Which of the following need not necessarily be saved on a context switch between processes ? (GATE CS 2000)

Accepted Answer

A)  general purpose registers
B)  translation look-aside buffer
C)  program counter
D)  all of these

Question 9

the access takes place, is called a(n) ____.

Accepted Answer

A)  shared memory segments
B)  entry section
C)  race condition
D)  process synchronization

Question 10

In priority scheduling algorithm, when a process arrives at the ready queue, its priority is compared with the priority of

Accepted Answer

A)  all process
B)  currently running process
C)  parent process
D)  init process

Question 11

Which of the following does not interrupt a running process ? (GATE CS 2001)

Accepted Answer

A)  a device
B)  timer
C)  scheduler process
D)  power failure

Question 12

The processes that are residing in main memory and are ready and waiting to execute are kept on a list called

Accepted Answer

A)  job queue
B)  ready queue
C)  execution queue
D)  process queue

Question 13

An unrecoverable error is known as _________.

Accepted Answer

A)  hard error
B)  tough error
C)  soft error
D)  none of these

Question 14

What is a medium-term scheduler ?

Accepted Answer

A)  it selects which process has to be brought into the ready queue
B)  it selects which process has to be executed next and allocates cpu
C)  it selects which process to remove from memory by swapping
D)  none of these

Question 15

What is a short-term scheduler ?

Accepted Answer

A)  it selects which process has to be brought into the ready queue
B)  it selects which process has to be executed next and allocates cpu
C)  it selects which process to remove from memory by swapping
D)  none of these

Question 16

Which scheduling algorithm allocates the CPU first to the process that requests the CPU first?

Accepted Answer

A)  first-come, first-served scheduling
B)  shortest job scheduling
C)  priority scheduling
D)  none of the mentioned

Question 17

In priority scheduling algorithm

Accepted Answer

A)  cpu is allocated to the process with highest priority
B)  cpu is allocated to the process with lowest priority
C)  equal priority processes can not be scheduled
D)  none of the mentioned

Question 18

Which of the following do not belong to queues for processes ?

Accepted Answer

A)  job queue
B)  pcb queue
C)  device queue
D)  ready queue

Question 19

In a time-sharing operating system, when the time slot given to a process is completed, the process goes from the running state to the :

Accepted Answer

A)  blocked state
B)  ready state
C)  suspended state
D)  terminated state

Question 20

Which of the following state transitions is not possible ?

Accepted Answer

A)  blocked to running
B)  ready to running
C)  blocked to ready
D)  running to blocked

Exam 2: Operating System and Process Management: Part A