Output of C programs | Set 42
QUE.1 What is the output of following program?
C
#include <stdio.h>
int main()
{
int val = 1;
do {
val++;
++val;
} while (val++ > 25);
printf ( "%d\n" , val);
return 0;
}
|
a. 10 10 10
b. 100xaa54f10
c. Run time error
d. No Output
Answer : a
Explanation: Because y contains the address of x so *y print 10 then **z contains address of y of x so print the value of x 10 and 3rd *(*z) contains address of y of x that’s why print 10. So, final output is 10 10 10.
QUE.2 What is the output of following program?
a) 25
b) 50
c) 12
d) 4
Answer : d
Explanation: Here, do while loop executes once and then it will check condition while will be false meanwhile value will be increased 3 times (two times in do while body and once while checking the condition);
Hence value will be 4.
QUE.3 What is the output of following program in the text file?
C
#include <stdio.h>
int main()
{
char str[10] = "Hello" ;
printf ( "%d, %d\n" , strlen (str), sizeof (str));
return 0;
}
|
a) enter in the if
b) not entered
c) run time error
d) segmentation fault
Answer : b
Explanation: In this program, We are check the if condition all (a, b, c)>0 but d = 0 so condition is false didn’t enter in the if so print not entered.
QUE.4 What is the output of following program?
a) 5, 10
b) 10, 5
c) 10, 20
d) None of the mentioned
Answer: a
Explanation: strlen gives length of the string that is 5; sizeof gives total number of occupied memory for a variable that is 8; since str is a pointer so sizeof(str) may be 2, 4 or 8.
It depends on the computer architecture.
QUE.5 What is the output of following program?
C
#include <stdio.h>
int main()
{
if (0)
;
printf ( "Hello" );
printf ( "Hi" );
return 0;
}
|
OPTION
a) Hi
b) HelloHi
c) run time error
d) None of the mentioned
Answer : b
Explanation: There is a semicolon after the if statement, so this statement will be considered as a separate statement; and here printf(“Hello”); will not be associated with the if statement. Both printf statements will be executed.
Last Updated :
29 Oct, 2021
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