1. Are logical operators sequence points?
a) True
b) False
c) Depends on the compiler
d) Depends on the standard
Answer
Answer: a [Reason:] None.
2. Does logical operators in C language are evaluated with short circuit?
a) True
b) False
c) Depends on the compiler
d) Depends on the standard
Answer
Answer: a [Reason:] None.
3. Result of a logical or relational expression in C is
a) True or False
b) 0 or 1
c) 0 if expression is false and any positive number if expression is true
d) None of the mentioned
Answer
Answer: b [Reason:] None.
4. What will be the value of d in the following program?
-
#include <stdio.h> -
int main()
-
{ -
int a = 10, b = 5, c = 5;
-
int d;
-
d = b + c == a;
-
printf("%d", d);
-
}
a) Syntax error
b) 1
c) 5
d) 10
Answer
Answer: b [Reason:] None.
5. What is the output of this C code?
-
#include <stdio.h> -
int main()
-
{ -
int a = 10, b = 5, c = 3;
-
b != !a;
-
c = !!a;
-
printf("%dt%d", b, c);
-
}
a) 5 1
b) 0 3
c) 5 3
d) 1 1
Answer
Answer: a [Reason:] None.
6. Which among the following is NOT a logical or relational operator?
a) !=
b) ==
c) ||
d) =
Answer
Answer: d [Reason:] None.
7. What is the output of this C code?
-
#include <stdio.h> -
int main()
-
{ -
int a = 10;
-
if (a == a--)
-
printf("TRUE 1t");
-
a = 10;
-
if (a == --a)
-
printf("TRUE 2t");
-
}
a) TRUE 1
b) TRUE 2
c) TRUE 1 TRUE 2
d) Compiler Dependent
Answer
Answer: d [Reason:] This is a sequence point problem and hence the result will be implementation dependent
8. Relational operators cannot be used on:
a) structure
b) long
c) strings
d) float
Answer
Answer: a [Reason:] None.
