String handling functions

What will be the output of the program ?

#include<stdio.h>

int main()
{
static char s[25] = "The gentleman";
int i=0;
char ch;
ch = s[++i];
printf("%c", ch);
ch = s[i++];
printf("%c", ch);
ch = i++[s];
printf("%c", ch);
ch = ++i[s];
printf("%c", ch);
return 0;
}
1. hhe!
2. he g
3. The g
4. Hheg
What will be the output of the following program in 16 bit platform assuming that 1022 is memory address of the string "Hello1" (in Turbo C under DOS) ?

#include<stdio.h>

int main()
{
printf("%u %s\n", &"Hello1", &"Hello2");
return 0;
}
1. 1022 Hello2
2. Hello1 1022
3. Hello1 Hello2
4. 1022 1022
Which header declares several functions useful for testing and mapping characters?
1. assert.h
2. stdio.h
3. ctype.h
4. errno.h
The______function tests for any character for which isalpha or isdigit is true
1. isxdigit()
2. isspace()
3. isalnum()
4. isupper()
What does the following C code do?
int iscntrl( int c);
1. checks if character is upper case
2. checks if character is lower case
3. tests for any control character
4. no function as such
What do the following C function do?
int isgraph(int c);
1. tests for only space character
2. tests for only digit
3. tests for only lower case
4. tests for any printing character
The isdigit function tests for any decimal-digit character
1. true
2. false
Which function returns true only for the characters defined as lowercase letters?
1. islow()
2. islower()
3. isalpa()
4. isalnum()
This function checks whether the passed character is white-space.
1. ispunct()
2. isgraph()
3. isspace()
4. isalpha()
The standard white-space characters are the following: space (' '), form feed (' \ f '),
newline (' \n') , horizontal tab (' \tr), and vertlcal tab (' \v') can be tested with function.
1. ispunct()
2. isalpha()
3. isgraph()
4. isspace()
Which function tests for any character that is an uppercase letter.
1. iscntrl()
2. ispunct()
3. isdigit()
4. isupper()
The______function tests for any hexadecimal-digit character.
1. iscntrl()
2. ispunct()
3. isgraph()
4. isxdigit()
The________function converts an uppercase letter to the corresponding lowercase letter.
1. islower()
2. isupper()
3. toupper()
4. tolower()
The toupper() function converts a ______ to the corresponding ______
1. uppercase, lowercase
2. lowercase, uppercase
3. binary, decimal
4. decimal, binary
fgetc, getc, getchar are all declared in ________
1. stdio. h
2. ctype. h
3. assert. h
4. stdarg. h
isalpha() function is used to detect characters both in uppercase and lowercase.
1. true
2. false
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);
1. ch = ‘ ‘ can be printed
2. ch = ‘ ‘ cannot be printed
3. compile error
4. run-time error
The C library function checks whether the passed character is printable
1. isgraph()
2. isalpha()
3. isprint()
4. ispunct()
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);
1. ch = 0xC is hexadecimal character
2. ch = 0xC is not hexadecimal character
3. compile error
4. run-time error
Which among the following option is the full set of character class Hexadecimal digits?
1. { 0 1 2 3 4 5 6 7 8 9 A B C D E F }
2. { 0 1 2 3 4 5 6 7 8 9 a b c d e f }
3. { 0 1 2 3 4 5 6 7 8 9 A B C D E F a b c d e f }
4. { 0 1 2 3 4 5 6 7 8 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++;
}
1. little star
2. lITTLE sTAR
3. LITTLE STAR
4. Little Star
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);
1. ch = |\t| printable
2. ch = |\t| not printable
3. ch = | | printable
4. ch = | | not printable
_______ occurs when a result is too large in magnitude to represent errors as a floating-point value of the required type.
1. underflow
2. significance loss
3. domain
4. overflow
What occurs when a result has nowhere near the number of signiﬁcant digits indicated by its type.
1. domain
2. underflow
3. overflow
4. siginificance loss
What error occurs when a result is undeﬁned for a given argument value?
1. signiﬁcance loss
2. underflow
3. overflow
4. domain
_____ is reported on a domain error.
1. EDOM
2. ERANGE
3. Significance loss
4. Underflow
ERANGE is reported on an overflow or an underflow.
1. true
2. false
What will be the output of the following C code?

errno = 0;
y = sqrt(2);
if(errno == EDOM)
printf("Invalid value\n");
else
printf("Valid value\n");
1. Invalid value
2. Valid value
3. No output
4. Compile error
What will be the output of the following C code?
errno = 0;
y = sqrt(-10);
if(errno == EDOM)
printf("Invalid value \n");
else
printf("Valid value\n");
1. Invalid value
2. Valid value
3. No output
4. Compile error
errno causes trouble in two subtler ways(vague and explicit).
1. true
2. false
No library function will store a zero in errno.
1. True
2. False
__________ tells the compiler that this data is deﬁned somewhere and will be connected with the linker.
1. errno
2. extern
3. variable
4. yvals

String handling functions

Quiz