Yippee Technology Online Aptitude Test on C language

Nested unions are allowed

Which of the following operations can be performed on the file "NOTES.TXT" using the below code?

FILE *fp;
 fp = fopen("NOTES.TXT", "r+");

Which of the following function is used to find the first occurrence of a given string in another string?

Point out the compile time error in the program given below.

#include<stdio.h>
 
 int main()
 {
 int *x;
 *x=100;
 return 0;
 }

Point out the error in the following program.

#include<stdio.h>
 int main()
 {
 void v = 0;
 
 printf("%d", v);
 
 return 0;
 }

only int and char data type is allowed in Union, Structures and Enums ?

Functions can be called either by value or reference

While() and do.... While() loop both are same ?

what is the scope of variable X, if we declared it in small loop?

Is it true that too many recursive calls may result into stack overflow?

How would you round off a value from 1.66 to 2.0?

In the following code, the P2 is Integer Pointer or Integer?

typedef int *ptr;
 ptr p1, p2;

A function cannot be defined inside the another function, but a function can be called inside a another function.

What will be the output of the program ?

#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;
 }

Is it true ? A function cannot return more than one value at a time, because after returning a value the control is given back to calling function.

How to get length of array a[20] ?

Which of the declaration is correct?

which is true ?

1.  Maximum number of arguments that a function can take is 12


2.  Maximum number of arguments that a function can take is 127

How will you print \n on the screen?

What will be the output of the program?

#include<stdio.h>
 
 int main()
 {
 int y=128;
 const int x=y;
 printf("%d\n", x);
 return 0;
 }

The keyword used to transfer control from a function back to the calling function is

How to join following two strings in C language ?

char str1[]="Hello" , str2[]=" Yippeetechnology.com"

Point out the error in the following program

#include<stdio.h>
 int main()
 {
 display();
 return 0;
 }
 void display()
 {
 printf("YippeeTechnology.com");
 }

Names of functions in two different files linked together must be unique

Which of these is not correct about file handling in c ?

What is the similarity between a structure, union and enumeration?

Which of the following special symbol allowed in a variable name?