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15 Questions

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Object-Oriented Programming Concepts

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Questions and Answers

What is the primary purpose of using constructors in a class?

To provide public access to all data members

To override the default access modifier

To restrict private access to certain members

To initialize object data and validate values (correct)

What happens if a class does not have a constructor?

A runtime exception is thrown

A compile-time error occurs

The class cannot be instantiated

A default constructor is automatically generated (correct)

What is true about the data members initialized by a constructor?

They are always public and accessible by any part of the program

They are always private and inaccessible by any part of the program

They are assigned default values without any validation

They are validated for their values before assignment (correct)

What is the purpose of a default constructor?

To provide default values for object fields Signup and view all the answers

What is the default access modifier for a class if not specified?

Private Signup and view all the answers

What is the access modifier of a default constructor?

Default Signup and view all the answers

What is the purpose of validating values in a constructor?

To ensure data integrity and consistency Signup and view all the answers

What is the benefit of using constructors to initialize object data?

It ensures data members are initialized with valid values Signup and view all the answers

What is initialized when a default constructor is generated?

All object fields Signup and view all the answers

When is a default constructor generated?

When a class does not have a constructor Signup and view all the answers

What happens to every instance of the class?

It is initialized without any parameter values Signup and view all the answers

What is the default access modifier if none is specified?

Default Signup and view all the answers

Which access modifier allows access from outside the class?

Public Signup and view all the answers

What is the purpose of a constructor?

To initialize the class with specified values Signup and view all the answers

What is the effect of a private access modifier?

It allows access from within the class only Signup and view all the answers