Object-Oriented Programming Module 05

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Questions and Answers

What is the primary purpose of a constructor in a class?

To create an object from the class (correct)
To define the attributes of a class
To encapsulate class functionality
To overload methods in the class

In class encapsulation, which practice is essential to control access to an object's data?

Using private attributes with public getters and setters (correct)
Allowing direct access to all class attributes
Using public methods for attribute access
Making all attributes public

What does it mean to instantiate an object from a class?

To add new methods to the class
To define the class structure
To modify existing attributes of the class
To create a new instance of the class (correct)

What is method overloading?

Defining methods with the same name but different parameters (D) Signup and view all the answers

What is a fundamental benefit of modular programming in the context of using objects?

Enhanced clarity and organization in code structure (A) Signup and view all the answers

Which principle is primarily demonstrated by using setters in a flowchart?

Object state validation (B) Signup and view all the answers

What is the purpose of a static variable in a utility class?

To share information across all instances of the class (B) Signup and view all the answers

Why would you declare a constant as static final in a class?

To save memory by storing a single value for all instances (B) Signup and view all the answers

What role does garbage collection play in modern programming languages?

It automatically deletes unused objects from memory (D) Signup and view all the answers

In which scenario is it necessary to use static methods?

When the method operates independently of instance variables (A) Signup and view all the answers

Which of the following statements about instance creation is true?

Each instance can share static variables with others (A) Signup and view all the answers

What is one key benefit of using modular programming?

It promotes code reuse and separation of concerns (D) Signup and view all the answers

What is the primary function of static members in a program?

They are loaded into memory before execution and hold a single instance. (B) Signup and view all the answers

Which statement about static methods is true?

They can only reference static variables within the class. (A) Signup and view all the answers

Why are static members unsuitable for storing new information during execution?

They are loaded into memory only once and only hold one value. (B) Signup and view all the answers

What does the keyword 'public' signify when used with a static method?

The method is accessible from any other class. (B) Signup and view all the answers

What is the impact of having static fields in a class?

They are shared among all instances of the class. (C) Signup and view all the answers

What characterizes method overloading in object-oriented programming?

Multiple methods with the same name but different parameters. (A) Signup and view all the answers

Which of the following best explains the concept of encapsulation?

Hiding the internal state of an object from outside access. (A) Signup and view all the answers

How is object instantiation typically performed in a programming context?

Using a constructor method to create an instance. (D) Signup and view all the answers

Study Notes

What is an Object?

Objects are essential for dynamic memory allocation, allowing software to reserve or release space based on application requirements.
Static members are loaded into memory prior to execution, making them unsuitable for dynamic data handling during runtime.
The public static void main(...) indicates that the main method's bytecode is loaded first in RAM.
Static members maintain a single memory location; hence, they can only hold one value at a time within the class context.
Resetting a static value does not change its memory location.

Pseudocode and Flowcharts with Objects

Use special 'box' icons to represent external processes in pseudocode and flowcharts involving objects.
Objects can be declared or manipulated later using setters like regular methods.
Utility classes, such as Math, utilize static methods to perform operations without needing object instances.
Static variables are necessary for shared data across instances, such as tracking the number of created objects.
Declaring constants as static final optimizes memory usage by avoiding duplication with every object instance.

Garbage Collection

Memory management is critical; objects should be deleted once they are no longer required.
Early object-oriented programming languages, like C++, required manual memory management.
Modern languages, such as Java, implement garbage collection to automatically free up memory occupied by unused objects.

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Description

This quiz covers key concepts from Module 05 of the Object-Oriented Programming course. Topics include the definition of objects and the fundamentals necessary for understanding object-oriented design. Enhance your knowledge of programming principles vital for developing dynamic applications.