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Objective Type Set
Online MCQ Assignment
Question Solution
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1. Which is true about isaplpha(c), where c is an int that can be represented as an unsigned
    char or EOF.isalpha(c) returns?
a) Non-zero if c is alphabetic
b) 0 if c is not alphabetic
c) Both Non-zero if c is alphabetic & 0 if c is not alphabetic
d) None of the mentioned

View Answer

Answer: c [Reason:] None.

2. Which is true about isupper(c), where c is an int that can be represented as an unsigned
    char or EOF.isupper(c) returns?
a) Non-zero if c is upper case
b) 0 if c is not upper case
c) Nothing
d) Both Non-zero if c is upper case & 0 if c is not upper case

View Answer

Answer: d [Reason:] None.

3. Which is true about isalnum(c), where c is an int that can be represented as an unsigned
    char or EOF.isalnum(c) returns?
a) Non-zero if isalpha(c) or isdigit(c)
b) 0 if not isalpha(c) or not isdigit(c)
c) Both Non-zero if isalpha(c) or isdigit(c) & 0 if not isalpha(c) or not isdigit(c)
d) None of the mentioned

View Answer

Answer: c [Reason:] None.

4. What is the output of this C code?

  1.     #include <stdio.h>
  2.     #include <ctype.h>
  3.     int main()
  4.     {
  5.         char c = 't';
  6.         printf("%dn", isspace(c));
  7.     }

a) Non-zero number
b) Nothing
c) Error
d) t

View Answer

Answer: a [Reason:] None.

5. What is the output of this C code?

  1.     #include <stdio.h>
  2.     #include <ctype.h>
  3.     int main()
  4.     {
  5.         char c = 't';
  6.         printf("is :%cn", tolower('A'));
  7.     }

a) A
b) a
c) Non-zero number
d) Zero

View Answer

Answer: b [Reason:] None.

6. Which types of input are accepted in toupper(c)?
a) char
b) char *
c) float
d) Both char and char *

View Answer

Answer: a [Reason:] None.

7. What is the difference in the ASCII value of capital and non-capital of the same letter is?
a) 1
b) 16
c) 32
d) Depends with compiler

View Answer

Answer: c [Reason:] None.

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