1. Which of the following doesn’t require an & for the input in scanf?
a) char name[10];
b) int name[10];
c) float name[10];
d) all of the mentioned
Answer
Answer: a [Reason:] None.
2. Which of the following is an invalid method for input?
a) scanf(“%d%d%d”,&a, &b, &c);
b) scanf(“%d %d %d”, &a, &b, &c);
c) scanf(“Three values are %d %d %d”,&a,&b,&c);
d) none of the mentioned
Answer
Answer: d [Reason:] None.
3. Which of the following represents the function for scanf?
a) void scanf(char *format, …)
b) int scanf(char *format, …)
c) char scanf(int format, …)
d) char *scanf(char *format, …)
Answer
Answer: b [Reason:] None.
4. scanf returns as its value
a) Number of successfully matched and assigned input items
b) Nothing
c) Number of characters properly printed
d) Error
Answer
Answer: a [Reason:] None.
5. What is the output of this C code?
-
#include <stdio.h> -
void main()
-
{ -
int n;
-
scanf("%d", n);
-
printf("%d", n);
-
}
a) Prints the number that was entered
b) Segmentation fault
c) Nothing
d) Varies
Answer
Answer: c [Reason:] None.
6. int sscanf(char *string, char *format, arg1, arg2, …)
a) Scans the string according to the format in format and stores the resulting values through arg1, arg2, etc
b) The arguments arg1,arg2 etc must be pointers
c) Scans the string according to the format in format and stores the resulting values through arg1, arg2, etc, those arguments arg1,arg2 etc must be pointers
d) None of the mentioned
Answer
Answer: c [Reason:] None.
7. The conversion characters d, i, o, u, and x may be preceded by h in scanf to indicate
a) A pointer to short
b) A pointer to long
c) Nothing
d) Error
Answer
Answer: a [Reason:] None.
8. What is the output of this C code (when 4 and 5 are entered)?
-
#include <stdio.h> -
void main()
-
{ -
int m, n;
-
printf("enter a number");
-
scanf("%d", &n);
-
scanf("%d", &m);
-
printf("%dt%dn", n, m);
-
}
a) Error
b) 4 junkvalue
c) Junkvalue 5
d) 4 5
Answer
Answer: d [Reason:] None.
