Question

What occurs when an empty case matches the controlling expression?

A) Fall through
B) Syntax error
C) Infinite loop
D) None of the above.

Answer 1

An empty case in a switch statement without a break statement will lead to a fall through, meaning subsequent case statements will be executed.

Step-by-step explanation:

When an empty case in a switch statement matches the controlling expression, the behavior encountered is known as fall through. In programming languages like C, C++, and Java, when a case in a switch block does not have a break statement, the control falls through to subsequent case statements until a break is encountered or the switch block ends. This means that even if the case is empty, if there is no break statement at the end of that case, the next case's statements (or the default case) will be executed. This feature can sometimes be used intentionally for efficiency, but it can also lead to unintentional errors if not handled carefully.