Unit 3

1.      Packages in Java are used for:

• Improving code readability

• Grouping related classes and interfaces

• Reducing code complexity

• All of the above

2.      Which keyword is used to import a specific class from a package in Java?

• include

• require

• import

• use

3.      In Java, a class can belong to:

• Only one package

• Multiple packages

• No package at all

• Two packages only

4.      An interface in Java can contain:

• Instance variables

• Constructors

• Abstract methods

• All of the above

5.      A class in Java can implement multiple interfaces:

• True

• False

6.      Which access modifier is used for an interface method that should be accessible only within the same package?

• public

• protected

• private

• default (package-private)

7.      Which keyword is used to explicitly throw an exception in Java?

• exception

• throw

• catch

• try

8.      When an exception occurs in Java and is not caught in the current method, it is:

• Silently ignored

• Handled by the compiler automatically

• Passed to the parent method

• Propagated up the call stack

9.      The "finally" block in Java exception handling is used for:

• Declaring variables

• Handling errors

• Executing code that should always run

• Defining custom exceptions

10.      Which keyword is used to define a custom exception class in Java?

• exception

• throws

• extend

• throw