W10_PASS(W9)_ExceptionHandling

What are the two phases of program execution when talking about errors?

• Error Identifying, Error Reporting

• Error Reporting, Error Manipulating

• Error Identifying, Error Handling

• Error Reporting, Error Handling

Answer explanation

Error Reporting the phase of execution where an error is identified within the program. Error Handling is the phase of execution where an error has already been identified within the program and this part of the program is responsible for handling or fixing it.

What is the parent class of all the exception classes?

• Exception

• Error

• Throwable

• RunTimeException

A checked exception should be handle with a try-catch or declared using

• throw clause

• finally clause

• throws clause

• catch clause

If we do not handle an exception the program execution will continue after the exception line.

• true

• false

Unchecked exception is encountered when there is a possibility for an operation to fail.

• true

• false

Answer explanation

Checked exception is encountered when there is a possibility for an operation to fail. Such program error could occur due to programmer incorrect input or missing validation, etc.

Null Pointer Exception is considered as unchecked exception.

• true

• false

Answer explanation

More exception such as Index out of Bounds Exception, Input Mismatch Exception are all belongs to unchecked exceptions which likely cause by programmer oversight or incorrect input.

The finally block is executed only when a exception is thrown.

• true

• false

Can we use a finally block without a catch?

• yes

• no

The throws keyword appears within the method body.

• true

• false

Answer explanation

The throw keyword appears within the method body. The throws keyword is used within the method header.

Which of the following is used to raise a custom exception?

• throws

• raise

• try-catch

• throw