C Questions and Answers – Character Handling – 2

This set of C Multiple Choice Questions & Answers (MCQs) focuses on “Character Handling – 2”.

Pre-requisite for this C MCQ set: Advanced C Programming Video Tutorial.

1. The________function converts an uppercase letter to the corresponding lowercase letter.
a) islower()
b) isupper()
c) toupper()
d) tolower()
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2. The toupper() function converts a ______ to the corresponding ______
a) uppercase, lowercase
b) lowercase, uppercase
c) binary, decimal
d) decimal, binary
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3. fgetc, getc, getchar are all declared in ________
a) stdio. h
b) ctype. h
c) assert. h
d) stdarg. h
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4. isalpha() function is used to detect characters both in uppercase and lowercase.
a) true
b) false
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5. What will be the output of the following C code?

int ch= ' ';
if(isgraph(ch))
printf("ch = %c can be printed \n",ch);
else
printf("ch=%c cannot be printed \n",ch);

a) ch = ‘ ‘ can be printed
b) ch = ‘ ‘ cannot be printed
c) compile error
d) run-time error
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6. The C library function checks whether the passed character is printable.
a) isgraph()
b) isalpha()
c) isprint()
d) ispunct()
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7. What will be the output of the following C code?

char ch[ ] = "0xC";
if(isxdigit(ch[ ]))
printf("ch = %s is hexadecimal character \n",ch);
else
printf("ch = %s is not hexadecimal character \n",ch);

a) ch = 0xC is hexadecimal character
b) ch = 0xC is not hexadecimal character
c) compile error
d) run-time error
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8. Which among the following option is the full set of character class Hexadecimal digits?
a) { 0 1 2 3 4 5 6 7 8 9 A B C D E F }
b) { 0 1 2 3 4 5 6 7 8 9 a b c d e f }
c) { 0 1 2 3 4 5 6 7 8 9 A B C D E F a b c d e f }
d) { 0 1 2 3 4 5 6 7 8 9}
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9. What will be the output of the following C code?

int i = 0;
char c;
char str[ ] = "Little Star";
while(str[i])
{
putchar (toupper(str[i]));
i++;
}

a) little star
b) lITTLE sTAR
c) LITTLE STAR
d) Little Star
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10. What will be the output of the following C code?

int ch = '\t';
if(isprint(ch))
printf("ch = |%c| printable  \n", ch);
else
printf("ch= |%c| not printable \n",ch);

a) ch = |\t| printable
b) ch = |\t| not printable
c) ch = | | printable
d) ch = | | not printable
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