Week 9-10 PC8 Exception Handling & File I/O Quiz

What is the primary purpose of exception handling in Java?

• To improve program speed

• • To manage errors and prevent program crashes

• • To optimize memory usage

• • To automatically fix bugs

Which block of code is always executed, regardless of whether an exception is thrown?

• • try

• • catcH

• • finally

• • throw

What keyword is used to manually throw an exception in Java?

• • catch

• • throw

• • finally

• • try

Which of the following classes is used to read data from a text file efficiently?

• • FileWriter

• • FileReader

• • BufferedReader

• • Scanner

Exception propagation occurs when:

• • An exception is caught in the same method where it was thrown

• • An exception moves up the call stack if not handled

• • An exception is ignored by the compiler

• • An exception is automatically resolved

What is the correct way to handle multiple exceptions in Java?

• • Multiple try blocks

• • Multiple catch blocks

• • Multiple finally blocks

• • Multiple throw blocks

Custom exceptions are created by:

• Implementing the Throwable interface

• • Extending the Exception class

• • Using the 'throw' keyword

• • Overloading the catch block

Which method is used to write text to a file in Java?

• • read()

• • write()

• • append()

• • input()

What happens if a required file is not found during a file read operation?

• • The program continues with default values

• • An IOException is thrown

• • A NullPointerException is thrown

• • The program crashes silently

To prevent memory leaks, which block should be used to close file streams?

• • try

• • catch

• • finally

• • throw