What Is The Main Component Of Operating System?

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⟩ What is the main component of operating system?

Main component of operating system are kernel and shell.

Shell is a interface between application program and kernel whenever application program wants some work to be done It contacts kernel and kernel inturn perform work with the help of device drivers .thus we can say kernel is an interface between hardware and shell.

Kernel uses device drivers to control microcontroller card of peripheral device and inturn work is being accomplished.

application program -> [shells ->kernel ->device driver -> controller card -> physical hardware]

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What is the output of the program?

 #! /usr/bin/awk -f
 BEGIN {
  a[1,1]=0
  a[1,2]=1
  a[2,1]=2
  a[2,2]=3
	for(i=1;i<3;i++) {
	 for(j=1;j<3;j++) {
	 print a[i,j]
	 }
	}
 }
a) 0 1 2 3
b) 0 2
c) 1 3
d) syntax error

What is the output of the program?

 #! /usr/bin/awk -f
 BEGIN {
  a["linux","MCQ"]="google"
  print a["linux","MCQ"]	 
 }
a) google
b) linux MCQ
c) a["linux","MCQ"]
d) syntax error

What is the output of the program?

 #! /usr/bin/awk -f
 BEGIN {
  a[1]="google"
  a[2]="google"
  for(i=1;i<3;i++) {
   print a[i]
  }
 }
a) "google" will print 2 times
b) "google" will print 3 times
c) program will generate error becasue 2 array elements have the same value
d) program will generate syntax error

Define the output of the program?

 #! /usr/bin/awk -f
 BEGIN {
  a["linux","MCQ"]="google"
  print a["linux","MCQ"]	 
 }
a) google
b) linux MCQ
c) a["linux","MCQ"]
d) syntax error

What is the output of the program?

 #! /usr/bin/awk -f
 #This filename is text.awk
 BEGIN {
  print FILENAME
 }
a) test.awk
b) program will print nothing
c) syntax error
d) fatal error

Which one of the following is used by awk to control the conversion of numbers to string?
a) RS
b) OFMT
c) SUBSEP
d) RSTART

What is the meaning of $ sign in awk programming?
a) the word following is the name of variable
b) we are referring to a field or column in the current line
c) $ sign is used for comment
d) none of the mentioned

In awk program, the name of the array can not be same with the
a) name of variable
b) value of the array element
c) both (a) and (b)
d) none of the mentioned

RSTART is set by invoking the
a) match function
b) index function
c) asort function
d) split function

In awk, the built-in variable FS is
a) input field seperator
b) output field seperator
c) record seperator
d) subscript seperator

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