Elementary Concepts of Objects and Classes

Chapter 3

Elementary Concepts of Objects and Classes

Class 9 - Logix Kips ICSE Computer Applications with BlueJ

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Multiple Choice Questions

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Question 1

An object has ...........

1. Attributes
2. State
3. Behaviour
4. All of these ✔

Explanation

An object is an identifiable entity that has a set of attributes, behaviour and state. So all of the options are applicable for objects.

Question 2

A class is ...........

1. An object factory
2. A blueprint to create objects
3. A specification for objects
4. All of these ✔

Explanation

A class is a template or blueprint for multiple objects with similar features and maybe regarded as a specification for creating similar objects. So all of the options are applicable for class.

Question 3

........... represents an entity in the real-world with its identity and behaviour.

1. A class
2. An object ✔
3. A procedure
4. A method

Explanation

An object is an identifiable entity with a set of attributes, behaviour and state.

Question 4

........... is a template to create similar objects that share common characteristics and behaviour.

1. A function
2. A procedure
3. An attribute
4. A class ✔

Explanation

A class is a template or blueprint for multiple objects with similar features and maybe regarded as a specification for creating similar objects.

Question 5

The values of an object's ........... represent the state of the object.

1. Methods
2. Procedures
3. Attributes ✔
4. Classes

Explanation

Attributes of an object define its state.

Question 6

The terms object and ........... are often interchangeable.

1. Instance ✔
2. Behaviour
3. Attribute
4. State

Explanation

The terms object and instance are often interchangeable.