Why encapsulation is required in Java - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a private variable in a class.

Java

public class Person {
    private String [1];
}

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APerson

BgetName

Cname

Dpublic

Attempts:

3 left

💡 Hint

Common Mistakes

Using method names or access modifiers instead of variable names.

The variable name is declared private to hide it from outside access, which is a key part of encapsulation.

2fill in blank

medium

Complete the code to create a public getter method for the private variable.

Java

public String [1]() {
    return name;
}

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AsetName

Bname

CName

DgetName

Attempts:

3 left

💡 Hint

Common Mistakes

Using setter method names or variable names instead of getter method names.

The getter method is named getName to provide controlled access to the private variable name.

3fill in blank

hard

Fix the error in the setter method to properly set the private variable.

Java

public void setName(String [1]) {
    this.name = [1];
}

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AsetName

Bname

CName

Dthis

Attempts:

3 left

💡 Hint

Common Mistakes

Using different parameter names or keywords incorrectly.

The parameter name should match the variable name to correctly assign the value using this.name = name;.

4fill in blank

hard

Fill both blanks to complete the encapsulated class with private variable and public getter.

Java

public class [1] {
    private int [2];

    public int getAge() {
        return age;
    }
}

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AStudent

Bage

Cscore

DPerson

Attempts:

3 left

💡 Hint

Common Mistakes

Using variable names that do not match getter methods.

The class is named Student and the private variable is age to demonstrate encapsulation.

5fill in blank

hard

Fill all three blanks to complete the class with private variable, getter, and setter methods.

Java

public class [1] {
    private String [2];

    public String getName() {
        return [2];
    }

    public void setName(String [3]) {
        this.name = [3];
    }
}

Drag options to blanks, or click blank then click option'

AEmployee

Bname

Did

Attempts:

3 left

💡 Hint

Common Mistakes

Using different names for setter parameter and private variable.

The class is Employee, the private variable is name, and the setter parameter is also name to properly encapsulate the data.