Week 11-12 PC8 Advanced OOP Concepts Quiz

What is the primary benefit of using static members in Java?

• • Reduces code execution time

• • Shares values across all instances of the class

• • Increases

• • Prevents class inheritance

Which keyword is used to access static members of a class?

• • this

• • super

• • class

• • ClassName

What is the main purpose of a nested class?

• • To prevent data access

• • To group classes that are logically related

• • To execute code faster

• • To replace interfaces

Anonymous classes are primarily used for:

• • Enhancing inheritance

• • Implementing interfaces and overriding methods in a short syntax

• • Declaring global variables

• • Increasing the speed of file I/O operations

Which of the following is NOT true about Reflection in Java?

• • It allows inspection of class methods and fields at runtime

• • It can change object behavior during runtime

• • It enforces compile-time checking

• • It can instantiate objects dynamically

What is the main purpose of the Singleton pattern?

• • To create multiple instances of a class

• • To ensure only one instance of a class exists

• • To create an interface for object creation

• • To implement multithreading in Java

Which design pattern provides a way to create objects without specifying the exact class?

• • Observer Pattern

• • Singleton Pattern

• • Factory Pattern

• • Adapter Pattern

The Observer pattern is mainly used for:

• • Loading classes at runtime

• • Notifying multiple objects about state changes

• • Managing memory in Java

• • Accessing nested classes

How is a static nested class different from a non-static nested class?

• • It can access all members of the outer class

• • It can only access static members of the outer class

• • It requires an instance of the outer class to be created

• • It cannot be instantiated

Which Java feature allows classes to be loaded into memory during runtime?

• • Static loading

• • Dynamic loading

• • Thread pooling

• • File I/O