C#.NET — Understand logical OR (||), short-circuit evaluation, and when an assignment executes. Given: if (age > 18 || no < 11) a = 25; Which statements are correct?

Introduction / Context:
This item checks your grasp of the logical OR operator (||) in C#, particularly short-circuiting behavior and the exact condition under which the if body executes. Distinguishing which operand is evaluated in each scenario is the key.

Given Data / Assumptions:

• Statement: if (age > 18 || no < 11) a = 25;
• Five claims about evaluation order and execution.

Concept / Approach:
For p || q: if p is true, q is not evaluated (short-circuit). If p is false, q is evaluated, and the whole expression is true when either operand is true. The assignment runs when the compound condition is true (i.e., at least one subcondition is true).

Step-by-Step Solution:

Verification / Alternative check:
Truth table confirms that p || q is true if p or q is true, and q is skipped when p is true.

Why Other Options Are Wrong:

• A includes 5 (false).
• B includes 2 (false).
• D includes 2 and 5 (both false).
• E is wrong because a correct set exists.

Common Pitfalls:
Mixing up || with && or assuming both sides always evaluate.

Final Answer:
1, 3, 4