Is it mandatory to include a finally block when using a catch block in exception handling?

No, the finally block is not mandatory when using a catch block in Java. The finally block is used to execute code that should run regardless of whether an exception was thrown or not.

Example:

try {
    // code that might throw an exception
} catch (Exception e) {
    // exception handling
} finally {
    // code that always executes
}

If you do not need to perform any actions regardless of exceptions, the finally block can be omitted:

try {
    // code
} catch (Exception e) {
    // handling
}

Thus, finally is an optional block, not a mandatory one.