Q. Which is true about isalnum(c), where c is an int that can be represented as an unsigned char or EOF.isalnum(c) returns?

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Q. Which types of input are accepted in toupper(c)?

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Q. What is the difference in the ASCII value of capital and non-capital of the same letter is?

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Q. ungetc can be used only with getc.

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Q. How many characters for pushback is guaranteed per file while using ungetc(c, fp);

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Q. Which of the following is the correct syntax for calling function ungetc?
(Assume int c and FILE *fp)

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Q. ungetc is used

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Q. Which of the following the is the correct declaration for ungetc?

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Q. Which of the following cannot be used with ungetc?

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Q. What does the ungetc function return for the following expression?
ungetc(c, fp); //where declarations are int c and FILE *fp

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Q. int ungetc(int c, FILE *fp) returns

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

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Q. ungetc may be used with

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Q. The syntax for ungetc is

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Q. The function ____ obtains block of memory dynamically.

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Q. void * malloc(size_t n) returns

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Q. calloc() returns a storage that is initialized to

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Q. In function free(p), p is a

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Q. Memory allocation using malloc() is done in?

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Q. Why do we write (int *) before malloc?
int *ip = (int *)malloc(sizeof(int));

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