Questions and answers for exam Preparation

MCQs

Total Questions : 35 | Page 3 of 4 pages

Question 21.

What will be the output of the program ?

#include<stdio.h>
int main()
{
char *p;
p="%d\n";
p++;
p++;
printf(p-2, 23);
return 0;
}

21
23
Error
No output

Discuss Question

Answer: Option B. -> 23

Question 22.

What will be the output of the program ?

#include<stdio.h>
int main()
{
printf("%c\n", ~('C'*-1));
return 0;
}

Discuss Question

Answer: Option B. -> B

Question 23.

What will be the output of the program ?

#include<stdio.h>
int main()
{
float a=3.15529;
printf("%2.1f\n", a);
return 0;
}

3.00
3.15
3.2
3

Discuss Question

Answer: Option C. -> 3.2

float a=3.15529; The variable a is declared as an float data type and initialized

to value 3.15529;

printf("%2.1f`setminus`n", a); The precision specifier tells .1f tells the printf function

to place only one number after the .(dot).

Hence the output is 3.2

Question 24.

What will be the output of the program ?

#include<stdio.h>
What will be the output of the program ?
#include
int main()
{
printf("%c\n", ~('C'*-1));
return 0;
}

Discuss Question

Answer: Option B. -> B

No answer description available for this question.

Question 25.

What will be the output of the program ?

#include<stdio.h>
int main()
{
float a=3.15529;
printf("%2.1f\n", a);
return 0;
}

3.00
3.15
3.2
3

Discuss Question

Answer: Option C. -> 3.2

float a=3.15529; The variable a is declared as an float data type and initialized to value 3.15529;

printf("%2.1fn", a); The precision specifier tells .1f tells the printf function to place only one number

after the .(dot).

Hence the output is 3.2

Question 26.

If the file 'source.txt' contains a line "Be my friend" which of the following will
be the output of below program?

#include<stdio.h>
int main()
{
FILE *fs, *ft;
char c[10];
fs = fopen("source.txt", "r");
c[0] = getc(fs);
fseek(fs, 0, SEEK_END);
fseek(fs, -3L, SEEK_CUR);
fgets(c, 5, fs);
puts(c);
return 0;
}

friend
frien
end
Error in fseek();

Discuss Question

Answer: Option C. -> end

The file source.txt contains "Be my friend".

fseek(fs, 0, SEEK_END); moves the file pointer to the end of the file.

fseek(fs, -3L, SEEK_CUR); moves the file pointer backward by 3 characters.

fgets(c, 5, fs); read the file from the current position of the file pointer.

Hence, it contains the last 3 characters of "Be my friend".

Therefore, it prints "end".

Question 27.

What will be the output of the program ?

#include<stdio.h>
int main()
{
int k=1;
\
printf("%d == 1 is" "%s\n", k, k==1?"TRUE":"FALSE");
return 0;
}

k == 1 is TRUE
1 == 1 is TRUE
1 == 1 is FALSE
K == 1 is FALSE

Discuss Question

Answer: Option B. -> 1 == 1 is TRUE

Step 1: int k=1; The variable k is declared as an integer type and initialized to '1'.

Step 2: printf("%d == 1 is" "%sn", k, k==1?"TRUE":"FALSE"); becomes

=> k==1?"TRUE":"FALSE"

=> 1==1?"TRUE":"FALSE"

=> "TRUE"

Therefore the output of the program is 1 == 1 is TRUE

Question 28.

What will be the content of 'file.c' after executing the following program?

#include<stdio.h>
int main()
{
FILE *fp1, *fp2;
fp1=fopen("file.c", "w");
fp2=fopen("file.c", "w");
fputc('A', fp1);
fputc('B', fp2);
fclose(fp1);
fclose(fp2);
return 0;
}