Java 7 - Exceptions/assertions

Front 1

The second part of assert expression can be evaluated to everything but

Back 1

void

Front 2

Try-with-resources. When try block throws an Expression and then close() method throws an expression. Which Expression are thrown to the caller

Back 2

First Expression (from try block). Expressions from close() method are suppressed

Front 3

What is checked and unchecked exceptions?

Back 3

The unchecked exception classes are the run-time exception classes and the error
classes.
The checked exception classes are all exception classes other than the unchecked
exception classes. That is, the checked exception classes are all subclasses of
Throwable other than RuntimeException and its subclasses and Error and its
subclasses.

Front 4

Assert statement second operand evaluation

Back 4

Second operand of assert statement should evaluate to object or primitive. It cannot be void.It can be null.

Front 5

How to use assert as a keyword identifier?

Back 5

From Java 1.5 onwards, assert is treated as a keyword by default (as opposed to Java 1.4 version where it is treated as an identifier) so there is no need for -source 1.5 or 1.6 switch. If asser is identifier - use javac - source 1.3

Front 6

Can you reassign variables defined in the try-with-resources statement?

Back 6

The auto-closeable variables defined in the try-with-resources statement are implicitly final. Thus, they cannot be reassigned.

Front 7

What is main restriction of multi-catch block?

Back 7

In a multi-catch block, you cannot combine catch handlers for two exceptions that share a base- and
derived-class relationship. You can only combine catch handlers for exceptions that do not share the
parent-child relationship between them.

Front 8

Order of execution while Exception thrown in try-with-resources block

Back 8

In a try-with-resources statement, any catch or finally block is run after the resources declared have been closed.

Front 9

Declaration of try-with-resources statement

Back 9

The type of the resource must be specified in the try itself

Front 10

The exception parameter in a multi-catch clause

Back 10

is implicitly final

Front 11

Empty catch block

Back 11

Considered bad coding practice