OOP Test

What is an example of dynamic binding?

ANY METHOD

METHOD OVERLOADING

METHOD OVERRIDING

COMPILING

For which case would the use of a static attribute be appropriate?

THE NUMBER OF PEOPLE IN EACH HOUSE IN A SMALL NEIGHBORHOOD

THE COLOR OF EACH HOUSE IN A SMALL NEIGHBORHOOD

THE LOT SIZE FOR EACH HOUSE IN A SMALL NEIGHBORHOOD

THE WEATHER CONDITIONS FOR EACH HOUSE IN A SMALL NEIGHBORHOOD

Why would you create an abstract class, if it can have no real instances?

TO PREVENT UNWANTED METHOD IMPLEMENTATION

TO EXPLORE A HYPOTHETICAL CLASS

TO RESERVE MEMORY FOR AN UNSPECIFIED CLASS TYPE

TO AVOID REDUNDANT CODING IN CHILDREN

When does static binding happen?

BOTH AT COMPILE TIME AND RUNTIME

AT RUNTIME

ONLY WHEN YOU EXPORT

AT COMPILE TIME

What is the best reason to use a design pattern?

IT WILL RESULT IN CODE THAT IS MORE EXTENSIBLE AND MAINTAINABLE.

IT WILL RESULT IN A MORE COMPACT PRODUCT.

IT WILL SPEED INITIAL DEVELOPMENT.

IT WILL ALLOW YOU TO ADD THAT DESIGN PATTERN TO YOUR RESUME.

What is encapsulation?

USING WORDS TO DEFINE CLASSES

DEFINING CLASSES BY FOCUSING ON WHAT IS IMPORTANT FOR A PURPOSE

HIDING THE DATA AND IMPLEMENTATION DETAILS WITHIN A CLASS

MAKING ALL METHODS PRIVATE

What is an IS-A relationship?

IT IMPLIES ENCAPSULATION.

A SUBCLASS OBJECT HAS AN IS-A RELATIONSHIP WITH ITS SUPERCLASS OR INTERFACE.

IT IMPLIES A VIRTUAL METHOD.

A SUPERCLASS OBJECT HAS AN IS-A RELATIONSHIP WITH ITS SUBCLASS.

You want a method with behavior similar to a virtual method—it is meant to be overridden—except that it does not have a method body. It just has a method signature. What kind of method should you use?

AN ABSTRACT METHOD

A PROTECTED INTERNAL METHOD

A PUBLIC INTERNAL METHOD

AN INTERNAL METHOD

Which code creates a new object from the Employee class?

EMPLOYEE CURRENTEMPLOYEE = NEW EMPLOYEE();

EMPLOYEE CURRENTEMPLOYEE;

EMPLOYEE CURRENTEMPLOYEE = EMPLOYEE.NEW();

EMPLOYEE CURRENTEMPLOYEE = EMPLOYEE.CREATE();

Which type of constructor cannot have a return type?

DEFAULT

CONSTRUCTORS DO NOT HAVE A RETURN TYPE.

PARAMETERIZED

COPY

When is a constructor executed?

WHEN AN OBJECT IS CREATED FROM A CLASS USING THE NEW KEYWORD

WHEN AN CLASS IS DEFINED USING THE CLASS KEYWORD

EVERY TIME AN OBJECT IS REFERENCED

WHEN AN OBJECT IS CREATED FROM A CLASS USING THE CREATE KEYWORD

If a local class is defined in a function, what is true for an object of that class?

THE OBJECT MUST BE DECLARED INSIDE ANY OTHER FUNCTION.

THE OBJECT CAN BE ACCESSED, DECLARED, AND USED LOCALLY IN THAT FUNCTION.

THE OBJECT IS TEMPORARILY ACCESSIBLE OUTSIDE THE FUNCTION.

THE OBJECT CAN CALL ALL OTHER CLASS MEMBERS ANYWHERE IN THE PROGRAM.

Which two blocks are used to handle and check errors?

CATCHING AND TRYING

DO AND WHILE

TRY AND CATCH

DO AND CHECK

Why would you implement composition using an id instead of a reference?

IT MINIMIZES COUPLING.

IT MAKES IT EASIER TO SAVE THE ENTITY.

ALL OF THESE ANSWERS

IT CAN MAKE THE ENTITY RETRIEVAL MORE EFFICIENT.

Which statement best describes the method of inheritance in OOP?

INHERITANCE FORCES A CLASS TO HAVE A SINGLE RESPONSIBILITY FROM ONLY ONE PARENT.

INHERITANCE MEANS THAT A GROUP OF RELATED PROPERTIES, METHODS, AND OTHER MEMBERS ARE TREATED AS A SINGLE UNIT OR OBJECT.

INHERITANCE DESCRIBES THE ABILITY TO CREATE NEW CLASSES BASED ON AN EXISTING CLASS.

INHERITANCE MEANS THAT YOU WILL NEVER HAVE MULTIPLE CLASSES THAT CAN BE USED INTERCHANGEABLY, EVEN THOUGH EACH CLASS IMPLEMENTS THE SAME PROPERTIES OR METHODS IN DIFFERENT WAYS.

Which type of inheritance, when done continuously, is similar to a tree structure?

MULTIPLE

HIERARCHICAL

HIERARCHICAL AND MULTIPLE

MULTILEVEL

Which statement is true?

A DEFAULT CONSTRUCTOR CANNOT BE DEFINED BY THE CODER.

A DEFAULT PARAMETER'S CONSTRUCTOR IS NOT EQUIVALENT TO THE DEFAULT CONSTRUCTOR.

A DEFAULT CONSTRUCTOR IS INHERITED FROM A PARENT CLASS.

A DEFAULT CONSTRUCTOR CAN BE CALLED EXPLICITLY.

Which of the following is NOT an advantage of using getters and setters?

GETTERS AND SETTERS CAN SPEED UP COMPILATION.

GETTERS AND SETTERS PROVIDE A DEBUGGING POINT FOR WHEN A PROPERTY CHANGES AT RUNTIME.

GETTERS AND SETTERS PROVIDE ENCAPSULATION OF BEHAVIOR.

GETTERS AND SETTERS PERMIT DIFFERENT ACCESS LEVELS.

How are user stories different from use cases?

USER STORIES ARE MORE DETAILED AND STRUCTURED.

USER STORIES ARE MORE ANECDOTAL AND PERSONAL.

USER STORIES ARE MORE ACCURATE.

USER STORIES ARE SHORTER AND LESS DETAILED.

Which type of inheritance must be used so that the resultant is hybrid?

Note: Select more than 1 option as correct answer

MULTIPLE

ANY TYPE OF INHERITANCE

MULTILEVEL

HIERARCHICAL

A language that does not support polymorphism but supports classes is considered what?

IF CLASSES ARE SUPPORTED, POLYMORPHISM WILL BE SUPPORTED.

AN OBJECT-BASED LANGUAGE

A CLASS-BASED LANGUAGE

A PROCEDURE-ORIENTED LANGUAGE

Two classes combine private data members and provide public member functions to access and manipulate those data members. Where is abstraction used?

ABSTRACTION IS USING THE CLASS CONCEPT WITH BOTH DATA MEMBERS AND MEMBER FUNCTIONS.

ABSTRACTION IS USING A PRIVATE ACCESS SPECIFIER FOR THE DATA MEMBERS.

ABSTRACTION IS USING PUBLIC MEMBER FUNCTIONS TO ACCESS AND MANIPULATE THE DATA MEMBERS.

THERE IS INSUFFICIENT INFORMATION TO DECIDE WHERE ABSTRACTION IS BEING USED.

What are the five creational design patterns by the Gang of Four?

COMPOSITE, BUILDER, FACTORY METHOD, PROTOTYPE, AND SINGLETON

OBSERVER, STATE, STRATEGY, TEMPLATE METHOD, AND VISITOR

COMPOSITE, VISITOR, STATE, PROTOTYPE, AND SINGLETON

ABSTRACT FACTORY, BUILDER, FACTORY METHOD, PROTOTYPE, AND SINGLETON

In multilevel inheritance, one class inherits how many classes?

AT LEAST TWO CLASSES

ONE CLASS ONLY

AS MANY CLASSES AS REQUIRED

TWO CLASSES

If an object is passed by reference, the changes made in the function are reflected _____.?

TO THE MAIN OBJECT OF THE CALLER FUNCTION, TOO

ONLY IN THE LOCAL SCOPE OF THE CALLED FUNCTION

ON THE COPY OF THE OBJECT THAT IS MADE DURING THE PASS

ON THE CALLER FUNCTION OBJECT AND ALSO THE CALLED FUNCTION OBJECT

What is a method?

THE EXACT SAME THING AS A FUNCTION AND SUBROUTINE

A SET OF INSTRUCTIONS DESIGNED TO PERFORM A FREQUENTLY USED OPERATION WITHIN A PROGRAM AND RETURN NO VALUES

A PROCEDURE ASSOCIATED WITH DATA AND BEHAVIOR

A SET OF VARIABLES THAT CAN CHANGE OVER TIME

A mobile phone is made up of components such as a motherboard, camera, and sensors. The motherboard represents all the functions of a phone, the display shows the display only, and the phone is represented as a whole. Which of the following has the highest level of abstraction?

MOTHERBOARD

CAMERA

MOBILE PHONE

DISPLAY

Which class has the highest degree of abstraction in a multilevel inheritance relationship of five levels?

THE CLASS AT THE SECOND LEVEL

ALL HAVE THE SAME DEGREE OF ABSTRACTION.

THE CLASS AT THE FIRST LEVEL

THE CLASS AT THE THIRD LEVEL

In the context of OOP, what is association?

ASSOCIATION IS A RELATIONSHIP WHERE ALL OBJECTS HAVE THEIR OWN LIFE CYCLES AND THERE IS NO OWNER.

ASSOCIATION IS A WHOLE/PART RELATIONSHIP WHERE ONE OBJECT IS COMPOSED OF ONE OR MORE OTHER OBJECTS, EACH OF WHICH IS CONSIDERED A PART OF THE WHOLE.

ASSOCIATION IS THE PROCESS WHERE MODEL ELEMENTS COOPERATE TO PROVIDE HIGHER-LEVEL BEHAVIOR.

ASSOCIATION IS WHERE ALL OBJECTS HAVE THEIR OWN LIFE CYCLE, BUT THERE IS OWNERSHIP, AND CHILD OBJECTS CAN NOT BELONG TO ANOTHER PARENT OBJECT.

In context of OOP, what is association?

ASSOCIATION IS A RELATIONSHIP WHERE ALL OBJECTS HAVE THEIR OWN LIFE CYCLE AND THERE IS NO OWNER.

ASSOCIATION IS THE PROCECSS WHERE MODEL ELEMENTS COOPERATE TO PROIDE HIGHER-LEVEL BEHAVIOR. ASSOCIATION IS WHOLE/PART RELATIONSHIP WHERE ONE OBJECT IS COMPOSED OF ONE OR MORE OTHER OBJECTS, EACH OF WHICH IS CONSIDERED A PART OF THE WHOLE.

ASSOCIATION IS WHERE ALL OBJECTS HAVE THEIR OWN LIFE CYCLE, BUT THERE IS OWNERHIP, AND CHILD OBJECTS CAN NOT BELONG TO ANOTHER PARENT OBJECT.

NONE OF THESE

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Exam Type:	OOP MCQ Skill Test
Questions Type:	Multiple Choice Questions
Total Questions:	30
Time Limit:	30 Minutes
Last Update	June, 2025

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