The modulus operator cannot be used with a long double.
A.
True
B.
False
Answer: Option A
Explanation:
fmod(x,y) - Calculates x modulo y, the remainder of x/y.
This function is the same as the modulus operator. But fmod() performs floating point or long double divisions.
In a function two return statements should never occur.
A.
Yes
B.
No
Answer: Option B
Explanation:
No, In a function two return statements can occur but not successively.
Example:
#include <stdio.h>
int mul(int, int); /* Function prototype */
int main()
{
int a = 0, b = 3, c;
c = mul(a, b);
printf("c = %d\n", c);
return 0;
}
/* Two return statements in the mul() function */
int mul(int a, int b)
{
if(a == 0 || b == 0)
{
return 0;
}
else
{
return (a * b);
}
}
#include<stdio.h>
int main()
{
int x=30, *y, *z;
y=&x; /* Assume address of x is 500 and integer is 4 byte size */
z=y;
*y++=*z++;
x++;
printf("x=%d, y=%d, z=%d\n", x, y, z);
return 0;
}
#include<stdio.h>
#include<string.h>
void modify(struct emp*);
struct emp
{
char name[20];
int age;
};
int main()
{
struct emp e = {"Sanjay", 35};
modify(&e);
printf("%s %d", e.name, e.age);
return 0;
}
void modify(struct emp *p)
{
p ->age=p->age+2;
}
A.
Error: in structure
B.
Error: in prototype declaration unknown struct emp
C.
No error
D.
None of above
Answer: Option B
Explanation:
The struct emp is mentioned in the prototype of the function modify() before declaring the structure.To solve this problem declare struct emp before the modify() prototype.
Can we specify a variable filed width in a scanf() format string?
A.
Yes
B.
No
Answer: Option B
Explanation:
In scanf() a * in a format string after a % sign is used for the suppression of assignment. That is, the current input field is scanned but not stored.
If malloc() successfully allocates memory it returns the number of bytes it has allocated.
A.
True
B.
False
Answer: Option B
Explanation:
Syntax: void *malloc(size_t size);
The malloc() function shall allocate unused space for an object whose size in bytes is specified by size and whose value is unspecified.
The order and contiguity of storage allocated by successive calls to malloc() is unspecified. The pointer returned if the allocation succeeds shall be suitably aligned so that it may be assigned to a pointer to any type of object and then used to access such an object in the space allocated (until the space is explicitly freed or reallocated). Each such allocation shall yield a pointer to an object disjoint from any other object. The pointer returned points to the start (lowest byte address) of the allocated space. If the space cannot be allocated, a null pointer shall be returned. If the size of the space requested is 0, the behavior is implementation-defined: the value returned shall be either a null pointer or a unique pointer.
"fflush()" flush any buffered output associated with filename, which is either a file opened for writing or a shell command for redirecting output to a pipe or coprocess.
Example: fflush(FilePointer); fflush(NULL); flushes all streams.
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