Question 1

main() { char s[ ] = "man"; int i; for( i=0; s[ i ]; i++) printf( "n%c%c%c%c", s[ i ], *(s+i), *(i+s), i[s] ); }

Accepted Answer

s[i], *(i+s), *(s+i), i[s] are all different ways of expressing the same idea.Generally array name is the base address for that array. Here s is the base address. i is the index number/displacement from the base address. So, indirecting it with * is same as s[i]. i[s] may be surprising. But in the case of C it is same as s[i].

Question 2

main() { char *p; p = "Hello"; printf ("%cn", *&*p); }

Accepted Answer

* is a dereference operator & is a reference operator. They can be applied any number of times provided it is meaningful. Here p points to the first character in the string "Hello". *p dereferences it and so its value is H. Again & references it to an address and * dereferences it to the value H

Question 3

Which of the following is not a valid escape code?

Accepted Answer

The valid escape codes in programming languages are ', ", \, n, or t are the valid escape codes. For example, the sequence 
 usually represents a newline, while the escape sequence \ represents a backslash, 	 usually represents a newtab.

Question 4

#define clrscr() 100 main() { clrscr(); printf( "%dn", clrscr() ); }

Accepted Answer

Preprocessor executes as a seperate pass before the execution of the compiler. So textual replacement of clrscr() to 100 occurs.The input program to compiler looks like this : main () { 100; printf("%d
",100); } Note: 100; is an executable statement but with no action. So it doesn't give any problem.

Question 5

The coding or scrambling of data so that humans cannot read them, is known as _____.

Accepted Answer

The coding or scrambling of data so that humans cannot read them is known as encryption.

Question 6

enum colors {BLACK,BLUE,GREEN} main() { printf( "%d..%d..%d", BLACK, BLUE, GREEN ); return(1); }

Accepted Answer

enum assigns numbers starting from 0, if not explicitly defined.

Question 7

What will be output when you will execute following c code? #include void main() { int const SIZE = 5; int expr; double value[SIZE] = { 2.0, 4.0, 6.0, 8.0, 10.0 }; expr=1|2|3|4; printf ( "%f", value[expr] ); }

Accepted Answer

Size of any array in c cannot be constantan variable.

Question 8

A function cannot be defined inside another function

Accepted Answer

A function cannot be defined inside the another function, but a function can be called inside a another function.

Question 9

What will be output of the following c program ? #include int main() { int max-val=100; int min-val=10; int avg-val; avg-val =( max-val + min-val ) / 2; printf( "%d", avg-val ); return 0; }

Accepted Answer

We cannot use special character – in the variable name. Variable name can have only underscore.

Question 10

SNOBOL is mainly used for

Accepted Answer

SNOBOL is a high-level computer programming language used especially in manipulating textual data. It is mainly used for string operations and was developed between 1962 and 1967.

Question 11

Which of the following statement is true?

Accepted Answer

A refers to encapsulation, B refers to coupling

Programming Questions