C String - placement questions answers

C String - placement questions answers

1. What would be the output of the following program?

main()
{
char *str[] = {“Frog”,”Do”,”Not”, “Die.”,”They”,”Croak!”};
printf(“%d %d”, sizeof (str), sizeof (str[0]));
}

a) 3 12
b) 2 12
c) 12 3
d) 12 2

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2. What would be the output of the following program?

main()
{
char str1[] = “Hello”;
char str2[] = “Hello”;
if(str1 == str2)
printf(“Equal”);
else
printf(“\nUnequal”);
}

a) Error.
b) Equal.
c) Unequal.
d) None.

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3. Would the following code give any error on compilation?

strcat (string,’!’);
a) Yes.
b) No.

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4. What will happen if I use this code in my program?
#define TRACE(n) printf("TRACE: %d\n", n)

a) Nothing it is good.
b) Code is wrong.
c) Error: macro replacement within a string literal
d) None

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5. How can I print a '%' character in a printf format string?

a) Use “\%”
b) Use “/%”
c) None
d) Use “%%”

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6. String operation such as strcmp(s, t), strcat(s, t), strcpy(s, t) and strlen(s) heavily rely upon

a) Presence of any escape sequence
b) Presence of NULL character
c) Presence of new-line character
d) None of the mentioned

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7. What would be the output of the following code?

main()
{
Printf(“%c”,”abcdefghijklmn[4]”);
}
a) d.
b) e.
c) abcdefgh.
d) None

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8. What would be the output of the following program?

main()
{
printf (5+“program”);
}

a) ram
b) gram
c) am
d) None

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9. In the following program which functions would get called?

main()
{
char str1[] = “Keep me clean ”;
char str2[40] ;
strcpy(str2,str1);
printf(“n%s”, str2);
}
strcpy(char *t, char *s)
{
while(*s)
{
*t = *s;
t++;
s++;
}
*t =”\0”;
}
a) The library defined strcpy()
b) The user defined strcpy()
c) Both
d) None.

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10. What is the difference in the following declaration?

char *p = “Sundaram”;
char a[] =”Sundaram”;

a) Both are same
b) First pointer initialization with string and other array initialization with string
c) First pointer initialized to point to string constant and other array initialization with string
d) None

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11. Is the following program correct?

main()
{
Char *str1 = “Union”;
Char *str2 = “Minister”;
Char *str3;
str3 = strcat(str1, str2);
Printf(“\n%s”, str3);

}
a) Print “Union Minister”
b) Garbage value
c) Print “UnionMinster”
d) Error

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12. What would be the output of the following program.

main()
{
Char str[7] = “Strings”;
printf(“%s”, str);
}

a) Strings
b) Error
c) Cannot predict
d) None

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13. What is the output of the following program?

void main()
{
printf("IMEIMEMYSELF"+9);
}

a) IMEI.
b) MYSELF.
c) SELF
d) None

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14. If the two strings are identical, then strcmp() function returns?

a) 0
b) 1
c) -1
d) None

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15. What would be the output of the following program

main()
{
char ch =’A’;
printf(“%d %d”, sizeof(ch), sizeof(‘A’));
}

a) 2 1
b) 1 1
c) 2 2
d) 1 2

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16. What would be the output of the following program?

main()
{
printf(“%d %d %d”, sizeof(‘3’), sizeof(“3”), sizeof(3));
}

a) 1 1 1
b) 2 2 2
c) 1 2 3
d) 1 2 2

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17. Which one of the following functions returns the string representation from a pointer to a time_t value?

a) gettime().
b) seektime().
c) ctime().
d) None

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18. Consider the declaration

Static char hello[] = “hello”;
The output of printf(“%s\n”, hello);

Will be the same as that of

a) Puts(hello).
b) Puts(“hello”).
c) Puts(“hello\n”).
d) Puts(“%s\n”, “hello”).

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19. The following program

main()
{
static char a[3][4] = {“abcd”, “mnop”,”fghi”};
putchar(**a);
}

a) Will not compile successfully
b) Report error at run time
c) Print garbege
d) None

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20. A string that is a formal parameter can be declared

a) An array with empty braces
b) A pointer to character
c) A pointer to a character
d) None

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