Test: Operators in C - Computer Science Engineering (CSE) MCQ

Explanation:
- The || operator is known as the logical OR operator. It returns true if at least one of its components evaluates to true, and false otherwise.
- In an expression involving the || operator, evaluation takes place from left to right. This means that the components on the left side will be evaluated first, and if any of them evaluate to true, the evaluation will stop and the overall expression will return true. If none of the components on the left side evaluate to true, the evaluation will continue with the components on the right side.
- However, if one of the components evaluates to true, the evaluation will stop and the overall expression will return true. This means that option II is correct.
- Option IV is also correct because evaluation takes place from left to right.

Therefore, the correct answer is 4. II and IV.

In this C program, the expression - -2 involves the use of the unary minus operator (-) applied twice to the number 2.

- The first - operator negates the number 2, resulting in -2.
- The second - operator negates -2, which effectively makes it positive again, resulting in 2.

So, the variable c is assigned the value 2, and the output of the printf statement is c=2, which corresponds to Option C.

Two integers are taken to be input

In an expression involving || operator, evaluation takes place from left to right and will be stopped if one of its components evaluates to true(a non zero value).
So in the given expression m = i++ || j++ || k++.
It will be stop at j and assign the current value of j in m.
therefore m = 1 , i = 1, j = 2 and k = 2 (since k++ will not encounter. so its value remain 2)

Evaluating ++i + ++i would produce undefined behavior, but the operand of sizeof is not evaluated, so i remains 3 throughout the program. The type of the expression (int) is reduced at compile time, and the size of this type (2) is assigned to j.

In the expression !i>14 , NOT (!) operator has more precedence than ' >' symbol. ! is a unary logical operator. !i (!10) is 0 (not of true is false). 0>14 is false (zero).

The comma operator evaluates both of its operands and produces the value of the second. It also has lower precedence than assignment. Hence c = a, b is equivalent to c = a, while d = (a, b) is equivalent to d = b.