C Programming Mock Test 7

10%

Question 1 of 10

1. calloc() returns storage that is initialized to.

Zero

Nothing

Null

One

Question 1 of 10

Question 2 of 10

2. In function free(p), p is a _______

pointer returned by malloc()

int

pointer returned by calloc()

pointer returned by malloc() & calloc()

Question 2 of 10

Question 3 of 10

3. ungetc() can be used only with getc().

false

depends on the platform

true

depends on the standard

Question 3 of 10

Question 4 of 10

4. What will be the output of the following C code?

scanf(“ %d %d %d”,&n1,&n2);

read data for three

read data for two

nothing can be said

generate error

Question 4 of 10

Question 5 of 10

5. What will be the output of the following C code?

    #include <stdio.h>
    int main()
    {
        char *str = "hello, world\n";
        printf("%d", strlen(str));
 
    }

Undefined behaviour

Compilation error

Question 5 of 10

Question 6 of 10

6. What will sin(x) returns?

sine of x where x is in radians

sine of x where x is in degree

cosine of x where x is in radians

cosine of x where x is in degree

Question 6 of 10

Question 7 of 10

7. Which of the following library function is not case-sensitive?

toupper()

isdigit()

all of the mentioned

tolower()

Question 7 of 10

Question 8 of 10

8. Control string specifies the type and format of the data that has to be obtained from the keyboard.

true

false

Question 8 of 10

Question 9 of 10

9. What will be the output of the following C code?

    #include <stdio.h>
    #include <string.h>
    int main()
    {
        char *str = "hello, world";
        char str1[9];
        strncpy(str1, str, 9);
        printf("%s %d", str1, strlen(str1));
    }

Undefined behaviour

Compilation error

hello, world 11

hello, wor 9

Question 9 of 10

Question 10 of 10

10. What error will generate if the read and write parameters are not separated by commas?

logical error

run-time error

compile error

no error

Question 10 of 10