C String Test 2

6) What will be the output of the below program?

#include<stdio.h>
#include<string.h>
int main()
{
    printf("%d\n", strlen("javaTpoint"));
    return 0;
}

9
10
11
Compile error

The correct option is (b).

Explanation:

The function strlen() returns the number of character in the string.

Therefore, strlen("javaTpoint") returns 10

Hence the output of the program is "10".

7) Which of the following statements are correct about string?

The format specifier %s is used to print a string.
The length of the string can be obtained by strlen().
The pointer cannot work on string.
A string is a collection of characters terminated by '\0'.

1, 4
1, 2, 3
1, 2, 4
2, 3, 4

The correct option is (c).

Explanation:

Clearly the statement 1, 2 and 4 are correct about the string but the statement 3 is incorrect because we can use pointer on strings.

For example: char *p="javaTpoint"

8) For the following statements will arr[2] and ptr[2] fetch the same character?

char arr[] = "javaTpoint"
char *ptr = "javaTpoint"

The correct option is (b).

Explanation:

Yes, for arr[2] and ptr[2] both the statements will prints the same character 'v'.

9) Which of the statements are correct about the below program?

#include<stdio.h>
int main()
{
    char stri[20], *p;
    printf("Enter the string\n:");
    scanf("%s", stri);
    p=stri;
    while(*p != '\0')
    {
        if(*p >= 97 && *p <= 122)
            *p = *p-32;
        p++;
    }
    printf("%s",stri);
    return 0;
}

The code converts lower case character to upper case
The code converts upper case character to lower case
The code converts a string to an integer
Compile Time error

The correct option is (a).

Explanation:

The program converts the enter string to upper case string.

Output:

 
Enter the string: javaTpoint
JAVATPOINT

10) Determine the wrong file opening mode from the following.

The correct option is (c).

Explanation:

File opening mode "x" is incorrect because there is no such mode exists for file opening operation in C language.

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C String Test 2

6) What will be the output of the below program?

7) Which of the following statements are correct about string?

8) For the following statements will arr[2] and ptr[2] fetch the same character?

9) Which of the statements are correct about the below program?

10) Determine the wrong file opening mode from the following.

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