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Constructors vs Methods

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Questions and Answers

What is the purpose of a parameterized constructor?

To initialize fields of the class with custom values (correct)

To create a new object by copying the state of an existing object

To initialize fields of the class with default values

To create a new object without any parameters

What does a copy constructor do?

Creates a new object by copying the state of an existing object (correct)

Initializes fields of the class with default values

Creates a new object without copying the state of an existing object

Copies the data available from the passed object to the newly created object

What is the primary role of the 'dispalyDepartmentInfo' method?

To initialize fields of the class with default values

To display the department name and staff number (correct)

To create a new object by copying the state of an existing object

To initialize fields of the class with custom values

When is a parameterized constructor used?

To initialize fields of the class with custom values (B) Signup and view all the answers

What is unique about a copy constructor compared to other constructors?

It takes an object of the same class as a parameter and initializes the new object with the values of the existing object (D) Signup and view all the answers

What is the purpose of a constructor in Java?

To perform actions or provide functionality within a class (A) Signup and view all the answers

How is a constructor different from a method in terms of naming?

Constructors have the same name as the class they belong to (B) Signup and view all the answers

What is the main characteristic of a default constructor in Java?

It has no parameters and is invisible (B) Signup and view all the answers

Can more than one default constructor be used for a single class in Java?

No, only one default constructor can be used for a class (B) Signup and view all the answers

What triggers the invocation of a constructor in Java?

Implicit calling when an object is created using the new keyword (D) Signup and view all the answers