University:
California State University, Northridge
Course:
COMP 110 | Introduction to Algorithms and Programming and Lab
Academic year:

2023
Views:

205

Pages:

11
Author:

Samuel K

Quiz 4Due Sep 29, 2023 at 11:45amPoints 40Questions 20Time Limit 75 MinutesQuestion 12 ptsWhat is encapsulation in Java?Combining multiple classes into oneRestricting access to the internal details of a classCreating objects from a classDefining multiple methods with the same name in a class Question 22 ptsWhy is encapsulation important in object-oriented programming?It simplifies the syntax of the codeIt allows for code reuseCIt promotes modularity and information hidingIt improves runtime performanceQuestion 32 ptsWhich keyword is used to declare a private member variable in a Javaclass?Cprivatepublicprotectedstatic Question 42 ptsWhat is the purpose of access modifiers in Java?To define the data type of a variableTo control the visibility and accessibility of class membersTo create objects from a classTo perform arithmetic operationsQuestion 52 ptsHow does the 'public' access modifier affect a class member in Java?It makes the member visible only within the same classIt allows access from any other classIt restricts access to the class itselfIt makes the member accessible only within the same package Question 62 ptsWhich of the following is an example of information hiding?Making all methods publicDeclaring member variables as 'static'Using access modifiers to restrict access to certain classmembersCreating a subclassQuestion 72 ptsWhat is the default access modifier for class members in Java if nomodifier is specified?privateprotectedpublicpackage-private (default) Question 82 ptsWhich access modifier allows a class member to be visible only withinthe same package?privatepublicpackage-privateprotectedQuestion 92 ptsWhat is the role of the 'getter' method in encapsulation?To set the value of a variableTo provide access to the value of a private variableTo create a new instance of a classTo declare a method as 'final' Question 102 ptsWhich access modifier is used to make a class member accessibleonly within its own class?privatepublicprotectedpackage-privateQuestion 112 ptsWhat is the purpose of the 'setter' method in encapsulation?To declare a method as 'static'To restrict access to a variableTo update the value of a private variableTo create an instance of a class Question 122 ptsHow can you achieve encapsulation in a Java class?By declaring all members as 'public'By using access modifiers to restrict access to certain membersBy making all methods 'static'By creating multiple instances of the classQuestion 132 ptsWhat is the benefit of using 'private' access modifier for membervariables?It allows unrestricted access to the variableIt makes the variable visible in any classIt restricts access to the variable within the same classIt prevents the variable from being used in any method Question 142 ptsWhich of the following is a disadvantage of excessive use of 'public'members?Improved code readabilityLimited reusabilityEnhanced securityBetter encapsulationQuestion 152 ptsWhat is the purpose of the 'protected' access modifier in Java?To allow unrestricted access to a variableTo restrict access to the class itselfTo make the variable accessible within the same packageTo allow access to subclasses Question 162 ptsWhich access modifier is not applicable to class members in Java?privatepublicfinalabstractQuestion 172 ptsHow can you prevent a method from being overridden in a subclass?By using the 'final' keywordBy declaring it as 'static'By using the protected access modifierW can you prevent a method from being overridden in a subclass? Question 182 ptsWhat is the role of the 'extends' keyword in Java?It allows a class to be instantiatedIt denotes the superclass of a classIt defines a new classIt specifies the access modifier of a classQuestion 192 ptsHow do you prevent a class from being subclassed in Java?Using the 'static' keywordBy declaring it as 'final'By using the "abstract" keywordIt is not possible in Java Question 202 ptsWhat is the role of the 'super' keyword in Java?CTo access superclass methods and fieldsTo declare a superclassTo create an instance of a classTo reference the current object