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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 14 of 42

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Q131.
What is the output of this code considering user typed jkl?
#include <stdio.h>
    int main()
    {
        char n[20];
        fgets(n, 19, stdin);
        ungetc(n[0], stdin);
        printf("%s\n", n);
        return 0;
    }
Discuss
Answer: (a).jkl
Q132.
How many characters for pushback is guaranteed per file while using ungetc(c, fp);
Discuss
Answer: (a).Only 1 character
Q133.
Which of the following is the correct syntax for calling function ungetc?
(Assume int c and FILE *fp)
Discuss
Answer: (b).ungetc(c, fp);
Discuss
Answer: (c).to push a character back to file
Q135.
Which of the following the is the correct declaration for ungetc?
Discuss
Answer: (c).int ungetc(int c, FILE *fp);
Q136.
Which of the following cannot be used with ungetc?
Discuss
Answer: (d).printf
Q137.
What does the ungetc function return for the following expression?
ungetc(c, fp); //where declarations are int c and FILE *fp
Discuss
Answer: (d).Either returns character c or returns EOF for an error
Q138.
int ungetc(int c, FILE *fp) returns
Discuss
Answer: (a).Either c or EOF for an error
Q139.
Only _____character of pushback is guaranteed per file when ungetc is used.
Discuss
Answer: (b).One
Q140.
ungetc may be used with
Discuss
Answer: (d).all of the mentioned

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