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Welcome to the Input and Output in C MCQs Page

Dive deep into the fascinating world of Input and Output in C with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Input and Output in C, a crucial aspect of C Programming. In this section, you will encounter a diverse range of MCQs that cover various aspects of Input and Output in C, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within C Programming.

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Check out the MCQs below to embark on an enriching journey through Input and Output in C. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of C Programming.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Input and Output in C. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Input and Output in C MCQs | Page 12 of 42

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Discuss
Answer: (b).Always
Q112.
What is the output of this C code?
#include <stdio.h>
    int main()
    {
        char str[10] = "hello";
        char *str1 = "world";
        strncat(str, str1, 9);
        printf("%s", str);
    }
Discuss
Answer: (a).helloworld
Q113.
Which of the following library function is not case-sensitive?
Discuss
Answer: (c).isdigit()
Q114.
The following expression can be substituted for

if (isalpha(c) && isdigit(c))
Discuss
Answer: (d).none of the mentioned
Q115.
Which of the following will return a non-zero value when checked with isspace(c)?
Discuss
Answer: (d).all of the mentioned
Q116.
What is the output of this C code?
#include <stdio.h>
    #include <ctype.h>
    int main()
    {
        char i = 9;
        if (isdigit(i))
            printf("digit\n");
        else
            printf("not digit\n");
            return 0;
    }
Discuss
Answer: (b).not digit
Q117.
What is the output of this C code?
#include <stdio.h>
    #include <ctype.h>
    int main()
    {
        int i = 9;
        if (isdigit(i))
            printf("digit\n");
        else
            printf("not digit\n");
            return 0;
    }
Discuss
Answer: (b).not digit
Q118.
What is the output of this C code?
#include <stdio.h>
    int main()
    {
        char i = '9';
        if (isdigit(i))
            printf("digit\n");
        else
            printf("not digit\n");
            return 0;
    }
Discuss
Answer: (a).digit
Q119.
What is the output of this C code?
#include <stdio.h>
    #include <ctype.h>
    int main()
    {
        if (isspace('n'))
            printf("space\n");
        else
            printf("not space\n");
            return 0;
    }
Discuss
Answer: (b).space
Q120.
What is the output of this C code?
#include <stdio.h>
    #include <ctype.h>
    int main()
    {
        int i = 0;
        if (isspace(i))
            printf("space\n");
        else
            printf("not space\n");
            return 0;
    }
Discuss
Answer: (c).not space

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