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block

Examine the following code and select the correct option(s):

Select the correct answer(s).  

(0/0)

Explanation

This class isn’t well encapsulated because its instance variable height is defined as a public member. Because the instance variable can be directly accessed by other classes, the variable doesn’t always use the method setHeight to set its height. The cla

---

Even though the class isn’t well encapsulated, it can be inherited by other classes.

The previous code is an example of a well-encapsulated class.

The class would be better encapsulated if the height validation weren’t set to 300.

The height of a Person can never be set to more than 300.

none

What is the output of the following code?

Select the correct answer(s).  

(0/0)

Explanation

Because a char value can be assigned to an int value, you might assume that a char array can be assigned to an int array. But we’re talking about arrays of int and char primitives, which aren’t the same as a primitive int or char. Arrays themselves are re

---

0:b

0:0

Compilation error

a:b

a:0

none

What is the output of the following code?

Select the correct answer(s).  

(0/0)

Explanation

The previous code won’t compile due to the following line of code: arr[3] = longVar; This line of code tries to assign a value of type long to a variable of type int. Because Java does support implicit widening conversions for variables, the previous code

---

113

103

4c010

Compilation error

4c10

none

Does the following method correctly accepts three whole numbers as method arguments and returns their sum as a decimal number?

Select the correct answer(s).  

(0/0)

Explanation

This method doesn’t accept integers as the method arguments. The type of the method argument arg3 is double, which isn’t an integer.

---

Yes

No

none

Does the following method correctly accepts three whole numbers as method arguments and returns their sum as a decimal number?

Select the correct answer(s).  

(0/0)

Explanation

Even though the name of the method seems weird, it accepts the correct argument list (all integers) and returns the result in the correct data type (float).

---

Yes

No

none

Which of the following statements are true?

Select the correct answer(s).  

(0/0)

Explanation

Option (e) is incorrect. There is no constraint on the number of arguments that can be passed on to a method, regardless of whether the method returns a value. Option (f) is incorrect. You can’t return the value null for methods that return primitive data

---

If the return type of a method is int, the method can return a value of type byte.

method whose return type is String can’t return null.

If the return type of a method is void, it can define a return statement without a value, as follows: return;

A method may or may not return a value.

A method should accept at least one method argument or define its return type.

A method may or may not accept any method arguments.

none

Select the incorrect options:

Select the correct answer(s).  

(0/0)

Explanation

Option (a) is incorrect. If a user defines a constructor for a class with any access modifier, it’s no longer an eligible candidate to be provided with a default constructor. Option (b) is correct. A class gets a default constructor only when it doesn’t h

---

A user can overload the default constructor of a class.

A class that gets a default constructor doesn’t have overloaded constructors.

The following class is also eligible for a default constructor: class EJava { void EJava() {} }

The following class is eligible for default constructor: class EJava {}

If a user defines a private constructor for a public class, Java creates a public default constructor for the class.

none

Given the following code, what is the output of the following code?

Select the correct answer(s).  

(0/0)

Explanation

No compilation issues exist with the code. You can overload methods by changing the type of the method arguments in the list. Using method arguments with data types having a base-derived class relationship (Object and String classes) is acceptable. Using

---

Runtime exception

long, Object

Compilation error

int, String

none

What is the output of the following code?

Select the correct answer(s).  

(0/0)

Explanation

When primitive data types are passed to a method, the values of the variables in the calling method remain the same. This behavior doesn’t depend on whether the primitive values are reassigned other values or modified by addition, subtraction, or multipli

---

Compilation error

20 20 11 10

20 10 11 11

20 10 11 10

none

Does the following method correctly accepts three whole numbers as method arguments and returns their sum as a decimal number?

Select the correct answer(s).  

(0/0)

Explanation

This method accepts three integer values: byte, int, and int. It computes the sum of these integer values and returns it as a decimal number (data type double). Note that the name of the method is subtractNumbers, which doesn’t make it an invalid option.

---

Yes

No

none

Does the following method correctly accepts three whole numbers as method arguments and returns their sum as a decimal number?

Select the correct answer(s).  

(0/0)

Explanation

The question specifies the method should return a decimal number (type double or float), but this method doesn’t return any value.

---

Yes

No

none

Examine the following code and select the correct options:

Select the correct answer(s).  

(0/0)

Explanation

You can define overloaded constructors with different access modifiers in the same way that you define overloaded methods with different access modifiers. But a change in only the access modifier can’t be used to define overloaded methods or constructors.

---

The class EJava defines two overloaded constructors. The private constructor isn’t counted as an overloaded constructor.

The code prints the following: public private protected

Constructors with different access modifiers can’t call each other.

The code prints the following: protected private public

The class EJava defines three overloaded constructors.

none

Given the following definition of class Person, what is the output of the following code?

Select the correct answer(s).  

(0/0)

Explanation

The class EJavaGuruPassObject1 defines two methods, someMethod and anotherMethod. The method someMethod modifies the value of the object parameter passed to it. Hence, the changes are visible within this method and in the calling method (method main). But

---

anotherMethod EJava someMethod someMethod

anotherMethod anotherMethod someMethod someMethod

Compilation error.

anotherMethod EJava someMethod EJava

none

Given the following signature of method eJava, choose the options that correctly overload this method:

Select the correct answer(s).  

(0/0)

Explanation

Option (a) is incorrect. Overloaded methods can change the access modifiers, but changing the access modifier alone won’t make it an overloaded method. This option also changes the names of the method parameters, but that doesn’t make any difference to a

---

ArrayList<String> eJava()

private String eJava(int val, String firstName, double dur)

String eJava()

char[] eJava(double numbers)

float eJava(double name, String age, byte duration)

public void eJava(int val1, String val2, double val3)

String eJava(String name, int age, double duration)

none

How can you include encapsulation in your class design?

Select the correct answer(s).  

(0/0)

Explanation

A well-encapsulated class should be like a capsule, hiding its instance variables from the outside world. The only way you should access and modify instance variables is through the public methods of a class to ensure that the outside world can access onl

---

Define public methods to access and modify the instance variables.

Define some of the instance variables as public members.

All of the previous.

Define instance variables as private members.