11. ungetc() may be used with ________
    

1. 1. getchar

   
   
   

   2. getc

   
   
   

   3. scanf

   
   
   

   4. All of above

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   All of above

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12. Only _____character of pushback is guaranteed per file when ungetc is used.

1. 1. Zero

   
   
   

   2. Many

   
   
   

   3. Two

   
   
   

   4. One

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   Zero

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13. What will be the output of the following C code?
    

    #include <stdio.h>
        int main()
        {
            int num;
            scanf("%d", &num);
            ungetc(num, stdin);
            scanf("%d", &num);
            printf("%d\n", num);
            return 0;
        }
    

1. 1. Whatever is typed by the user first time

   
   
   

   2. Undefined behaviour

   
   
   

   3. Compilation Error

   
   
   

   4. Whatever is typed by the user second time

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   Undefined behaviour

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14. What will be the output of the following C code considering user typed ajit?
    

    #include <stdio.h>
        int main()
        {
            char num[26];
            fgets(num, 25, stdin);
            ungetc(num[0], stdin);
            printf("%s\n", num);
            return 0;
        }
    

1. 1. Undefined behaviour

   
   
   

   2. jit

   
   
   

   3. Compilation Error

   
   
   

   4. ajit

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   ajit

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15. What will be the output of the following C code?
    

    #include <stdio.h>
        int main()
        {
            char num[25];
            fgets(num, 24, stdin);
            ungetc(num[0], stdin);
            scanf("%s", num);
            printf("%s\n", num);
            return 0;
        }
    

1. 1. First character of whatever user types first time and whatever user types second time

   
   
   

   2. Whatever string user types first time

   
   
   

   3. Whatever string user types second time

   
   
   

   4. Compilation Error

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   First character of whatever user types first time and whatever user types second time

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