Predict the output of following program, assume that a character takes 1 byte and pointer takes 4 bytes. C #include <stdio.h> int main() { char *str1 = "GeeksQuiz"; char str2[] = "GeeksQuiz"; printf("sizeof(str1) = %d, sizeof(str2) = %d", sizeof(str1), sizeof(str2)); return 0; }

sizeof(str1) = 4, sizeof(str2) = 10

sizeof(str1) = 10, sizeof(str2) = 10

sizeof(str1) = 4, sizeof(str2) = 4

sizeof(str1) = 10, sizeof(str2) = 4

Tutorials
Courses
Go Premium

C String

Last Updated :

Discuss

Comments

Question 1

Consider the following C program.

#include <stdio.h>
struct Ournode {
  char x, y, z;
};

int main() {
  struct Ournode p = {'1', '0', 'a' + 2};
  struct Ournode *q = &p;
  printf("%c, %c", *((char *)q + 1), *((char *)q + 2));
  return 0;
}

The output of this program is:

0, c
0, a+2
'0', 'a+2'
'0', 'c'

Discuss it

Question 2

Output of following program

#include <stdio.h>
int fun(char *p)
{
    if (p == NULL || *p == '\0') return 0;
    int current = 1, i = 1;
    while (*(p+current))
    {
        if (p[current] != p[current-1])
        {
            p[i] = p[current];
            i++;
        }
        current++;
    }
    *(p+i)='\0';
    return i;
}

int main()
{
    char str[] = "geeksskeeg";
    fun(str);
    puts(str);
    return 0;
}

gekskeg
geeksskeeg
geeks
Garbage Values

Discuss it

Question 3

Consider the following C program segment.

# include <stdio.h>
int main( )
{
    char s1[7] = "1234", *p;
    p = s1 + 2;
    *p = '0' ;
    printf ("%s", s1);
}

What will be printed by the program?

12
120400
1204
1034

Discuss it

Question 4

In below program, what would you put in place of “?” to print “Quiz”?

#include <stdio.h>
int main() 
{ 
  char arr[] = "GeeksQuiz"; 
  printf("%s", ?); 
  return 0; 
}

arr
(arr+5)
(arr+4)
Not possible

Discuss it

Question 5

A language with string manipulation facilities uses the following operations.

head(s)- returns the first character of the string s
tail(s)- returns all but the first character of the string s
concat(sl, s2)- concatenates string s1 with s2.

The output of concat(head(s), head(tail(tail(s)))), where s is acbc is

Discuss it

Question 6

Predict the output of following program, assume that a character takes 1 byte and pointer takes 4 bytes.

#include <stdio.h>
int main()
{
    char *str1 = "GeeksQuiz";
    char str2[] = "GeeksQuiz";

    printf("sizeof(str1) = %d, sizeof(str2) = %d",
           sizeof(str1), sizeof(str2));

    return 0;
}

sizeof(str1) = 10, sizeof(str2) = 10
sizeof(str1) = 4, sizeof(str2) = 10
sizeof(str1) = 4, sizeof(str2) = 4
sizeof(str1) = 10, sizeof(str2) = 4

Discuss it

Question 7

Assume that a character takes 1 byte. Output of following program?

#include<stdio.h>
int main()
{
    char str[20] = "GeeksQuiz";
    printf ("%d", sizeof(str));
    return 0;
}

9
10
20
Garbage Value

Discuss it

Question 8

Consider the following function written in the C programming language. The output of the above function on input “ABCD EFGH” is

void foo (char *a)
{
  if (*a && *a != ` `)
  {
     foo(a+1);
     putchar(*a);
  }
}

ABCD EFGH
ABCD
HGFE DCBA
DCBA

Discuss it

Question 9

The output of following C program is

#include <stdio.h>
char str1[100];

char *fun(char str[])
{
    static int i = 0;
    if (*str)
    {
        fun(str+1);
        str1[i] = *str;
        i++;
    }
    return str1;
}

int main()
{
    char str[] = "GATE CS 2015 Mock Test";
    printf("%s", fun(str));
    return 0;
}

GATE CS 2015 Mock Test
tseT kcoM 5102 SC ETAG
Nothing is printed on screen
Segmentation Fault

Discuss it

Question 10

Output of following C program? Assume that all necessary header files are included

int main()
{
    char *s1 = (char *)malloc(50);
    char *s2 = (char *)malloc(50);
    strcpy(s1, "Geeks");
    strcpy(s2, "Quiz");
    strcat(s1, s2);
    printf("%s", s1);
    return 0;
}

GeeksQuiz
Geeks
Geeks Quiz
Quiz

Discuss it

Tags:

C Quiz

There are 21 questions to complete.

Take a part in the ongoing discussion