C Programming Questions and Answers on Functions Returning Non-integers for Freshers
https://www.computersprofessor.com/2017/12/c-programming-questions-and-answers-on_3.html
1. What is the return-type of the function sqrt()
a) int
b) float
c) double
d) depends on the data type of the parameter
Answer: c
2. Which of the following function declaration is illegal?
a) double func();
int main(){}
double func(){}
b) double func(){};
int main(){}
c) int main()
{
double func();
}
double func(){//statements}
d) None of the mentioned
Answer: d
3. What is the output of this code having void return-type function?
#includevoid foo()
{return 1;
}void main()
{int x = 0;
x = foo();
printf("%d", x);
}
a) 1
b) 0
c) Runtime error
d) Compile time error
b) 0
c) Runtime error
d) Compile time error
Answer: d
4. What will be the data type returned for the following function?
#includeint func()
{return (double)(char)5.0;
}
a) char
b) int
c) double
d) multiple type-casting in return is illegal
b) int
c) double
d) multiple type-casting in return is illegal
Answer: b
5. What is the problem in the following declarations?
int func(int);
double func(int);
int func(float);
int func(int);
double func(int);
int func(float);
a) A function with same name cannot have different signatures
b) A function with same name cannot have different return types
c) A function with same name cannot have different number of parameters
d) All of the mentioned
Answer: d
6. The output of the code below is
#includevoid main()
{int k = m();
printf("%d", k);
}void m()
{printf("hello");
}
a) hello 5
b) Error
c) Nothing
d) Junk value
b) Error
c) Nothing
d) Junk value
Answer: a
7. The output of the code below is
#includeint *m()
{int *p = 5;
return p;
}void main()
{int *k = m();
printf("%d", k);
}
a) 5
b) Junk value
c) 0
d) Error
b) Junk value
c) 0
d) Error
Answer: a
8. The output of the code below is
#includeint *m();
void main()
{int *k = m();
printf("hello ");
printf("%d", k[0]);
}int *m()
{int a[2] = {5, 8};
return a;
}
a) hello 5 8
b) hello 5
c) hello followed by garbage value
d) Compilation error
b) hello 5
c) hello followed by garbage value
d) Compilation error
Answer: c
9. The output of the code below is
#includeint *m();
void main()
{int k = m();
printf("%d", k);
}int *m()
{int a[2] = {5, 8};
return a;
}
a) 5
b) 8
c) Nothing
d) Varies
b) 8
c) Nothing
d) Varies
Answer: d
10. The output of the code below is
#includevoid m(int k)
{printf("hi");
}void m(double k)
{printf("hello");
}void main()
{m(3);
}
a) hi
b) hello
c) Compile time error
d) Nothing
b) hello
c) Compile time error
d) Nothing
Answer: c
11. What is the default return type if it is not specified in function definition?
a) void
b) int
c) double
d) short int
Answer: b
12. What is the output of this C code?
#includeint foo();
int main()
{int i = foo();
}foo()
{printf("2 ");
return 2;
}
a) 2
b) Compile time error
c) Depends on the compiler
d) Depends on the standard
b) Compile time error
c) Depends on the compiler
d) Depends on the standard
Answer: a
13. What is the output of this C code?
#includedouble foo();
int main()
{foo();
return 0;
}foo()
{printf("2 ");
return 2;
}
a) 2
b) Compile time error
c) Depends on the compiler
d) Depends on the standard
b) Compile time error
c) Depends on the compiler
d) Depends on the standard
Answer: b
14. functions can return structure in c?
a) true
b) false
c) Depends on the compiler
d) Depends on the standard
Answer: a
15. functions can return enumeration constants in c?
a) true
b) false
c) depends on the compiler
d) depends on the standard
Answer: a
16. What is the output of code given below?
#includeenum m{JAN, FEB, MAR};
enum m foo();
int main()
{enum m i = foo();
printf("%d\n", i);
}int foo()
{return JAN;
}
a) Compile time error
b) 0
c) Depends on the compiler
d) Depends on the standard
b) 0
c) Depends on the compiler
d) Depends on the standard
Answer: a
