OBJECT ORIENTED PROGRAMMING - EXAM 1
QUESTIONS WITH COMPLETE SOLUTIONS!!
Real world objects share which two characteristics?
a. Inheritance and polymorphism
b. Classes and interfaces
c. State and behavior
d. Times and dates Answer - C. State and behavior
In object oriented programming how is state represented?
a. Functions
b. Methods
c. Global variables
d. Member Variables Answer - D. Member Variables
What is the purpose of a class in object oriented programming?
a. To create a data structure for functions
b. To create an interface for implementation
c. Serve as the blueprint of how objects will be created
d. To create a data structure for variables Answer - C. Serve as the blueprint of
how objects will be created
,Based on best practices and how the Java API Library is implemented a class
should start with a capital letter (i.e. Dog versus dog).
a. True
b. False Answer - A. True
When defining a class, member variables are included within the class's
open/close curly braces (i.e. {}) and methods are defined outside of the
open/close curly braces.
a. True
b. False Answer - B. False
Information hiding is accomplished via encapsulation
a. True
b. False Answer - A. True
Which of the following is the correct code for instantiating an instance of class
Dog?
a. Dog puppy = Dog;
b. Dog puppy;
c. Dog puppy = Dog();
d. Dog puppy = new Dog(); Answer - D. Dog puppy = new Dog();
Which part of the following statement is the instance or the created object?
,Dog puppy = new Dog();
a. Dog();
b. new
c. puppy
d. Dog Answer - C. puppy
In the following statement, Dog puppy = new Dog();, what is "Dog()" called?
a. Maker
b. Constructor
c. Creator
d. malloc Answer - B. Constructor
Regarding inheritance the existing class is called ____1____ and the new class
is called ____2____. Answer - 1. Superclass
2. Subclass
How many superclasses can a subclass have?
a. 1
b. 2
c. 3
d. unlimited Answer - A. 1
How many subclasses can a superclass have?
, a. 3
b. unlimited
c. 2
d. 1 Answer - B. unlimited
Given the class definition
public class KeyTerminology{}
what is "public" called?
a. Membership level
b. Access level modifier
c. Data type of class
d. Not relevant Answer - B. Access level modifier
What type of implementation behavior is the following class definition doing?
public class SubclassDog extends Dog{}
a. Interface
b. Inheritance
c. Extending
d. Implemenation Answer - B. Inheritance
QUESTIONS WITH COMPLETE SOLUTIONS!!
Real world objects share which two characteristics?
a. Inheritance and polymorphism
b. Classes and interfaces
c. State and behavior
d. Times and dates Answer - C. State and behavior
In object oriented programming how is state represented?
a. Functions
b. Methods
c. Global variables
d. Member Variables Answer - D. Member Variables
What is the purpose of a class in object oriented programming?
a. To create a data structure for functions
b. To create an interface for implementation
c. Serve as the blueprint of how objects will be created
d. To create a data structure for variables Answer - C. Serve as the blueprint of
how objects will be created
,Based on best practices and how the Java API Library is implemented a class
should start with a capital letter (i.e. Dog versus dog).
a. True
b. False Answer - A. True
When defining a class, member variables are included within the class's
open/close curly braces (i.e. {}) and methods are defined outside of the
open/close curly braces.
a. True
b. False Answer - B. False
Information hiding is accomplished via encapsulation
a. True
b. False Answer - A. True
Which of the following is the correct code for instantiating an instance of class
Dog?
a. Dog puppy = Dog;
b. Dog puppy;
c. Dog puppy = Dog();
d. Dog puppy = new Dog(); Answer - D. Dog puppy = new Dog();
Which part of the following statement is the instance or the created object?
,Dog puppy = new Dog();
a. Dog();
b. new
c. puppy
d. Dog Answer - C. puppy
In the following statement, Dog puppy = new Dog();, what is "Dog()" called?
a. Maker
b. Constructor
c. Creator
d. malloc Answer - B. Constructor
Regarding inheritance the existing class is called ____1____ and the new class
is called ____2____. Answer - 1. Superclass
2. Subclass
How many superclasses can a subclass have?
a. 1
b. 2
c. 3
d. unlimited Answer - A. 1
How many subclasses can a superclass have?
, a. 3
b. unlimited
c. 2
d. 1 Answer - B. unlimited
Given the class definition
public class KeyTerminology{}
what is "public" called?
a. Membership level
b. Access level modifier
c. Data type of class
d. Not relevant Answer - B. Access level modifier
What type of implementation behavior is the following class definition doing?
public class SubclassDog extends Dog{}
a. Interface
b. Inheritance
c. Extending
d. Implemenation Answer - B. Inheritance
