Revature Interview ACTUAL Exam Questions and CORRECT Answers

Revature Interview ACTUAL Exam
Questions and CORRECT Answers
What is an object? - CORRECT ANSWER - 1) Any entity that has state and behavior


2) An instance of a class


True/False: An object can be physical or logical - CORRECT ANSWER - True



What is a class? - CORRECT ANSWER - 1) In the context of JAVA:


Templates used to create objects and define object data types and methods


2) A blueprint from which you can create an individual object (e.g. blueprint for a skyscraper)


3) A group of objects that have common properties


Does Class consume any space? - CORRECT ANSWER - No



2 OOP advantages over Procedure Oriented Programming (POP) - CORRECT ANSWER -
1. Makes development and maintenance easier (POP is worse as project size increases)


2. Provides data hiding whereas POP can have its global variables accessed from anywhere


What is a constructor? - CORRECT ANSWER - 1) In JAVA:


Block of code called when an instance of an object is created, and memory allocated

, 2) Special type of method which is used to initialize an object




**
It is called "constructor" because it constructs the values at the time of object creation
**


Is a constructor required? - CORRECT ANSWER - No, JAVA would make a default
constructor


3 constructor rules - CORRECT ANSWER - 1) Constructor name must be the same as
class name


2) Constructor must have no explicit return type


3) A JAVA constructor cannot be abstract, static, final, or synchronized


2 types of constructors - CORRECT ANSWER - 1) Default constructor


2) Parameterized constructor


What is a default constructor? - CORRECT ANSWER - A default no-args constructor


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1) It contains default call to super(); which is the default behavior


2) If you implement any constructor, default constructor will not be created