Deck 4: Operating System and Process Management

Question 1

The process which terminates before the parent process exits becomes

A)zombie
B)orphan
C)child
D)none of the above

Answer 1

zombie

Question 2

Return value of fork() system call can be:

A)-1,<0,0
B)-1,>0,0

Answer 2

-1,>0,0

Question 3

If the fork() system call returns -1, then it means?

A)no new child process is created
B)the child process is an orphan
C)the child process is in zombie

Answer 3

no new child process is created

Question 4

Fork returns _____ to parent process on success

A)0
B)child process id
C)parent process id
D)none

Question 5

Which niceness value among the following indicate most favorable scheduling?

A)0
B)19
C)5
D)-20

Question 6

The maximum time slice that can be given to a process in Linux (where tick is 10ms) is

A)150ms
B)10ms
C)300 ms
D)600ms

Question 7

Nice can be used by an ordinary process to

A)increase the priority of a process
B)decrease the priority of a process
C)increase or decrease the priority of a process

Question 8

Which one can be a real time schedule policy?

A)sched_fifo
B)sched_spf
C)sched_other
D)sched_filo

Question 9

Solaris real time class priority is

A)0-59
B)60-99
C)100-159
D)160-169

Question 10

On x86-32 Linux, at which address the code segment of the program starts?

A)0x00000000
B)0x08048000
C)0x80000000
D)0xbfff0000

Question 11

On x86-32 Linux, at which address the user stack resides normally?

A)0x00000000
B)0x3fff0000
C)0x7fff0000
D)0xbfff0000

Question 12

A system has 512MB of physical memory. Which among the following is not a suitable virtual memory size for this system architecture?

A)512mb
B)256m
C)4gb
D)none of the above

Question 13

LRU stands for

A)last received unit
B)least recently used
C)least recently usable
D)lost recoverd unit

Question 14

Mm_struct maintains?

A)memory files
B)open files
C)pipe
D)active memory regions

Question 15

Is page table per process entity?

Question 16

Among these files which has an ELF format

A)shared objects
B)core
C)executables
D)all of the above

Question 17

If one of the thread in multithreaded process is blocked on an I/O, which of the following is true?

A)the entire process with block if their is no kernel supported threads
B)other threads of the process will continue to execute even if there is no kernel supported threads
C)it depends on specific implementatation
D)all of the above

Question 18

UNIX/Linux kernel is?

A)monolithic
B)micro
C)exo
D)nano

Question 19

Monolithic kernel

A)is highly extensiblity
B)has less run time overhead
C)smaller than micro level
D)suitable for real time system

Question 20

Runlevel system command is used for?

A)getting the present and previous runlevel of the system
B)setting the runlevel attribute of the system in the inittab file
C)can be used to restart or reboot the system
D)all of the above

Question 21

Pick the run level to run Linux in multi user mode with networking?

A)0
B)3
C)5
D)6

Question 22

Section 2 of manpage describes

A)commands
B)system calls
C)function calls
D)drivers

Question 23

Which of the following exec call is a system call?

A)execl
B)execlp
C)execve
D)execvp

Question 24

______________ timer is decremented only when the process is executing

A)itimer_real
B)itimer_virtual
C)itimer_prof
D)none of the above

Question 25

Daemon process is a?

A)group leader
B)session leader
C)orphan process
D)all the above

Question 26

The terminal used by a Daemon process is:

A)any terminal
B)no terminal
C)root terminal
D)system console

Question 27

shared memory can be used for?

A)read only operations
B)append
C)read or read write operations
D)write only

Question 28

Sysconf(_SC_PAGE_SIZE) returns?

A)size of the page
B)max size of the page
C)min size of the page
D)paging allowed or not