Exam (elaborations)
LATEST REVATURE STUDY GUIDE QUESTIONS WITH 100% CORRECT ANSWERS
- Course
- Institution
LATEST REVATURE STUDY GUIDE QUESTIONS WITH 100% CORRECT ANSWERS LATEST REVATURE STUDY GUIDE QUESTIONS WITH 100% CORRECT ANSWERS
[Show more]
Content preview
LATEST REVATURE STUDY GUIDE 2024-2025QUESTIONS WITH 100% CORRECT ANSWERS
What are the 4 pillars of OOP?: AbstractionEncapsulation
Inheritance Polymorphism
What is abstraction?: Abstraction is a process of hiding the implementation details and
showing only functionality to the user. Abstraction lets you focus on whatthe object does
instead of how it does it.
What is an Inheritence?: •A class (child) can gain another class's (parent's)features
(fields and methods) by extending the parent class.
Child is allowed to add own fields and methods
Doesn't inherit private fields or methods
Interfaces are a form of inheritance
Creates an IS-A relationship
What are the different types of Inheritance?: Single InheritanceMultilevel Inheritance
Hierarchical Inheritance Multiple Inheritance
What is a Single Inheritance?: A subclass inherits methods and attributes fromone
superclass
What is a Multilevel Inheritance?: Derived class will be inheriting a base classand acts
as the base class for other classes
What is a Hierarchical Inheritance?: Multiple subclasses inherit from one su-perclass
What is a Multiple Inheritance?: One class can inherit from more than onesuperclass
What is Polymorphism?: The ability for some code structures (method or objectto be
treated as different structures at runtime.
What is Casting?: When a value of one type is assigned another type.
, LATEST REVATURE STUDY GUIDE 2024-2025
QUESTIONS WITH 100% CORRECT ANSWERS
(NewType) myVar
What are the different types of Casting?: UpcastingDowncasting
What is Upcasting?: Storing a reference to an object in a base-class-typed(less specific)
reference variable
Animal firstRef = new Dog(); //upcast
What is Downcasting?: Take a previously upcasted reference and store thatreference in
reference variable that is a type closer to that of the actual object
Dog secRef = (Dog) firstRef; //downcast
What is Encapsulation?: Mechanism of wrapping data (variables) and codeacting on the
data (methods) together as a single unit.
Allows data hiding or restriction of data from being accessed outside of the class directly.
What are the different access modifiers in Encapsulation?: PublicProtected
PrivateDefault
What is the Public access modifier?: Seen by other classes no matter thepackage
What is the Protected access modifier?: Seen by subclasses or by classeswith same
package
What is the Private access modifier?: Seen by same class only
What is the Default access modifier?: Seen by any subclass or class in samepackage
What are Classes?: Template used to instantiate objects. Determines statesand behavio
an object will possess.
What is an Object?: An instance of a class in memory.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Courseinstructor. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $15.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
81113 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now