What is a try-catch block in Java?
Why Interviewers Ask This
Foundational questions like this help interviewers calibrate the rest of the interview. A confident, accurate answer signals that you have solid Java basics — a prerequisite for any developer role.
Answer
A try-catch block is the fundamental mechanism for handling exceptions in Java. Code that might throw an exception is placed inside the try block. If an exception occurs, execution jumps to the matching catch block that handles that exception type. Multiple catch blocks can follow a single try for different exception types. The optional finally block executes always — whether an exception was thrown or not — and is used for cleanup (closing files, database connections). Since Java 7, a single catch can handle multiple exception types: catch (IOException | SQLException e). Exceptions not caught will propagate up the call stack.
Pro Tip
Demonstrate both theoretical understanding and practical experience. Say what it is, then give an example of how you actually used it in a Java codebase.
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