C Programming Questions and Answers – Functions Returning Non-integers
C Programming Questions and Answers – Functions Returning Non-integers
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
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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
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3.What is the output of this code having void return-type function?
#include <stdio.h>
void foo()
{
return 1;
}
void main()
{
int x = 0;
x = foo();
printf(“%d”, x);
}
a) 1
b) 0
c) Runtime error
d) Compile time error
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4.What will be the data type returned for the following function?
#include <stdio.h>
int func()
{
return (double)(char)5.0;
}
a) char
b) int
c) double
d) multiple type-casting in return is illegal
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5.What is the problem in the following declarations?
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
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6.The output of the code below is
#include <stdio.h>
void main()
{
int k = m();
printf(“%d”, k);
}
void m()
{
printf(“hello”);
}
a) hello 5
b) Error
c) Nothing
d) Junk value
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7.The output of the code below is
#include <stdio.h>
int *m()
{
int *p = 5;
return p;
}
void main()
{
int *k = m();
printf(“%d”, k);
}
a) 5
b) Junk value
c) 0
d) Error
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8.The output of the code below is
#include <stdio.h>
int *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
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9.The output of the code below is
#include <stdio.h>
int *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
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10.The output of the code below is
#include <stdio.h>
void 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
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11.What is the default return type if it is not specified in function definition?
a) void
b) int
c) double
d) short int
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12.What is the output of this C code?
#include <stdio.h>
int 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
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13.What is the output of this C code?
#include <stdio.h>
double 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
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14.functions can return structure in c?
a) true
b) false
c) Depends on the compiler
d) Depends on the standard
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15.functions can return enumeration constants in c?
a) true
b) false
c) depends on the compiler
d) depends on the standard
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16.What is the output of code given below?
#include <stdio.h>
enum 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
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