Quiz: Take The Basic Java Concept Questions!

25 Questions | By Jonhamlin | Last updated: Mar 2, 2020 | Total Attempts: 342

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Quiz: Take The Basic Java Concept Questions!

Do you know the basic Java concepts? Do you know what the best definition of a class is? Do you know what an object is? Do you know that objects are valuable? If you look at a photograph of a computer screen, would you be able to tell how many objects there are? Take this quiz and get jiggy with Java! Go for it!

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Questions and Answers

1.

Choose the best definition for a Class.
- A.
  
  A group of students in a room
- B.
  
  An object definition, containing the data and function elements necessary to create an object
- C.
  
  An action for a program
2.

Choose the best definition of an object
- A.
  
  A thing
- B.
  
  An instance of a class
- C.
  
  Something you wear
3.

Choose the appropriate data type for this value: "dog"
- A.
  
  Int
- B.
  
  String
- C.
  
  Double
- D.
  
  Boolean
4.

Choose the appropriate data type for this value: true
- A.
  
  Int
- B.
  
  Double
- C.
  
  String
- D.
  
  Boolean
5.

Choose the appropriate data type for this value: 1
- A.
  
  Int
- B.
  
  Double
- C.
  
  String
- D.
  
  Boolean
6.

Choose the appropriate data type for this value: 5.5
- A.
  
  Int
- B.
  
  Double
- C.
  
  Boolean
- D.
  
  String
7.

Choose the appropriate data type for this value: A
- A.
  
  Int
- B.
  
  Double
- C.
  
  Char
- D.
  
  String
8.

Choose the appropriate data type for this value: "1"
- A.
  
  String
- B.
  
  Boolean
- C.
  
  Int
- D.
  
  Char
9.

Choose the appropriate data type for this value: female
- A.
  
  Boolean
- B.
  
  Int
- C.
  
  Char
- D.
  
  Double
10.

Choose the appropriate data type for this field: kindOfBird
- A.
  
  String
- B.
  
  Int
- C.
  
  Char
- D.
  
  Double
11.

Choose the appropriate data type for this field: numberOfEggs
- A.
  
  Double
- B.
  
  Char
- C.
  
  Boolean
- D.
  
  Int
12.

Choose the appropriate data type for this field: weightInKilos
- A.
  
  Char
- B.
  
  String
- C.
  
  Double
- D.
  
  Boolean
13.

Choose the appropriate data type for this field: isSwimmer
- A.
  
  Double
- B.
  
  Boolean
- C.
  
  String
- D.
  
  Int
14.

Choose the appropriate data type for this field: eggColour
- A.
  
  Boolean
- B.
  
  Char
- C.
  
  Int
- D.
  
  String
15.

Use the screen shot of this project to answer the question.How many classes are there?
- A.
  
  1
- B.
  
  2
- C.
  
  3
- D.
  
  0
16.

How many objects are there?
- A.
  
  3
- B.
  
  2
- C.
  
  1
- D.
  
  0
17.

How many fields are there
- A.
  
  1
- B.
  
  2
- C.
  
  3
- D.
  
  4
18.

What is the name of the 1st field?
19.

What is the name of the 4th field?
20.

What is the data type of the 1st field?
21.

What is the data type of the 3rd field?
22.

Which of the following always need a Capital letter ?
- A.
  
  Class names and Strings
- B.
  
  Objects and class names
- C.
  
  Fields and Strings
- D.
  
  Data types and fields
23.

What is the name of the highlighted area?
- A.
  
  Method
- B.
  
  Constructor
- C.
  
  Fields
- D.
  
  Variables
24.

What is the role of the constructor?
- A.
  
  Make the code confusing
- B.
  
  Create an instance of a class (an object)
- C.
  
  Create names for methods
- D.
  
  To create some type of change in the state of an object
25.

What is the name of this Class?
- A.
  
  Dog
- B.
  
  Dog1
- C.
  
  Dog2

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