COP3330 Exam Questions with Correct Answers 100% Pass

COP3330 Exam Questions with
Correct Answers 100% Pass

Which of the following statement is false? - CORRECT ANSWER-When you

enhance an existing interface with default methods-any class that implemented the

original interface will break.

Which of the following statements is false? - CORRECT ANSWER-An interface's

private static methods can be called by a default method in the interface

Which of the following statements is false? - CORRECT ANSWER-You cannot

prevent client code from creating objects of a class.

Polymorphism allows for specifics to be dealt with during - CORRECT

ANSWER-execution

Consider the following piece of code and choose the output: - CORRECT

ANSWER-Derived fun() called

Which of the following could be used to declare abstract method method1 in

abstract class Class1 (method1 returns an int and takes no arguments)? -

CORRECT ANSWER-public abstract int method1()

Consider the abstract superclass below: - CORRECT ANSWER-Both A and B.

,Consider classes A, B, and C, where A is an abstract superclass, B is a concrete

class that inherits from A and C is a concrete class that inherits from B. Class A

declares abstract method originalMethod, implemented in class B. Which of the

following statements is true of class C? - CORRECT ANSWER-None of them.

Which of the following represents the output of the following code segments? -

CORRECT ANSWER-Print "Base Constructor Called" then print "Derived

Constructor Called"

Every object in Java knows its own class and can access this information through

method: - CORRECT ANSWER-getClass

Which of the following represents the output of the following code segment? -

CORRECT ANSWER-it will show an error for line "Derived d = new Base()".

Which of the following lines is false about final Classes and final methods: -

CORRECT ANSWER-final methods are static

Which keyword is used to specify that a class will define the methods of an

interface? - CORRECT ANSWER-implements

Which of the following is not possible? - CORRECT ANSWER-A class that

inherits from two classes.

A class that implements an interface but does not declare all of the interface's

methods must be declared - CORRECT ANSWER-abstract




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, Consider the statements below: - CORRECT ANSWER-String r1 =

a.concat(b.concat(c));

String objects are immutable. This means they - CORRECT ANSWER-cannot be

changed

The length of a string can be determined by - CORRECT ANSWER-the String

method length()

What will be the output of the following code segment? - CORRECT ANSWER-

hello

The statement

s1.equalsIgnoreCase(s4)

is equivalent to which of the following? - CORRECT ANSWER-

s1.regionMatches(true, s4, 0, s4.length());

For




String c = "Hello. She sells sea shells";




The Java statements

int i = c.indexOf( "ll" );