What will be output if you will compile and execute the following c code?
#include
#define x 5+2
int main(){
int i;
i=x*x*x;
printf("%d",i);
return 0;
}
27
343
233
Compiler Error
Correct Answer :
A. 27
As we know #define is token pasting preprocessor it only paste the value of micro constant in the program before the actual compilation start. If you will see intermediate file you will find:
test.c 1:
test.c 2: void main(){
test.c 3: int i;
test.c 4: i=5+2*5+2*5+2;
test.c 5: printf("%d",i);
test.c 6: }
test.c 7:
You can absorb #define only pastes the 5+2 in place of x in program. So, i=5+2*5+2*5+2
=5+10+10+2
=27
Related Questions
continue statement is used
to go to the next iteration in a loop
come out of a loop
exit and return to the main function
restarts iterations from beginning of loop
The output of the following code is:
main()
{
xyz: goto abc;
printf("Hello");
abc: printf("World");
goto xyz;
}
{
xyz: goto abc;
printf("Hello");
abc: printf("World");
goto xyz;
}
Infinite loop
Hello World
World Hello
Compilation error
Which header file is essential for using strcmp() function?
string.h
strings.h
text.h
strcmp.h
It is necessary to initialize the array at the time of declaration.
True
False
char *s[10] defines an array of ------------------------
pointers to strings
string to pointer
both
What's wrong? while( (i < 10) && (i > 24))
the logical operator && cannot be used in a test condition
the while loop is an exit-condition loop
the test condition is always true
the test condition is always false
C programs are converted into machine language with the help of
An Editor
A compiler
An operating system
None of the above
The output of the following code is:
void main()
{
int a = 0;
while (a<=50) for(;;) if(++a % 50==0) break;
printf("a = %d", a);
}
{
int a = 0;
while (a<=50) for(;;) if(++a % 50==0) break;
printf("a = %d", a);
}
a = 100
a = 50
compilation error
runtime error
The output of the following code is:
void main()
{
int z, a = 5, b = 3; z = a * 2 + 26 % 3;
printf("%d", z); }
{
int z, a = 5, b = 3; z = a * 2 + 26 % 3;
printf("%d", z); }
10
0
12
None of the above
The output of the following code is:
void main()
{
int a = 1, b=2;
int *ip;
ip=&a;
b=*ip;
printf("%d", b);
}
{
int a = 1, b=2;
int *ip;
ip=&a;
b=*ip;
printf("%d", b);
}
2
1
100
0
Variables declared as register storage type gets stored in CPU registers.
True
False
Structures within structures cannot be created.
True
False
What is C Tokens?
The smallest individual units of c program
The basic element recognized by the compiler
The largest individual units of program
A & B Both
void' is a datatype.
True
False
A function to be called must be ended with a----------------
.
?
;
none of the above
printf("%d", sizeof('2')); will print 2.
True
False
strcat() function ----------------------- two strings.
delete
concatenate
compare
none of the above
/* The C language.
/* is a procedural language .*/*/
The above statement is valid.
True
False
The function fopen() on failure returns---------------------.
0
NULL
1
none of the above
fprintf()function can be used to write into console.
True
False
The output of the following code is:
void main()
{
int a = 20;
printf("%d\t%d
", ++a, a);
}
{
int a = 20;
printf("%d\t%d
", ++a, a);
}
21 21
20 21
21 20
20 20
A recursive function calls itself again and again.
True
False
Which of the following expressions is wrong
float a =123.56;
char ch ='T' * 'A';
char ch ='T' *20;
3 +a = b;
Which of the following is not a preprocessor directive
#if
#elseif
#undef
#pragma
The size of signed integer is ------ bytes.
4
2
8
10
An array elements are always stored in _________ memory locations.
Sequential
Random
Sequential and Random
None of the above
Which among the following is a unconditional control structure
do-while
if-else
goto
for
There are total ------ numbers of operators in 'C'.
35
45
55
40
Every if statement can be converted into an equivalent switch statement.
True
False
The output of the following code is:
int f(int a, int b);
void main()
{
int a = 12, b=154;
printf("%d", f(a, b));
}
int f(int a, int b)
{
if (a<b) return(f(b, a));
if(b==0) return(a);
return (f(b, a % b));
}
void main()
{
int a = 12, b=154;
printf("%d", f(a, b));
}
int f(int a, int b)
{
if (a<b) return(f(b, a));
if(b==0) return(a);
return (f(b, a % b));
}
2
1
Compilation error
Runtime error