Computer Science Quiz: Writing Custom Classes

Descrição

Quiz sobre Computer Science Quiz: Writing Custom Classes, criado por Chris Fraser em 06-11-2014.
Chris Fraser
Quiz por Chris Fraser, atualizado more than 1 year ago
Chris Fraser
Criado por Chris Fraser mais de 9 anos atrás
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Resumo de Recurso

Questão 1

Questão
An object has...?
Responda
  • State and Behaviour.
  • Actions and Classes.
  • Methods and Code.

Questão 2

Questão
How many objects can a class have?
Responda
  • 234
  • 2
  • As many as we want
  • 100

Questão 3

Questão
What type of declarations need to be made by a class?
Responda
  • State and Behavior
  • Class and Object
  • Data and Method

Questão 4

Questão
What is the toString method?
Responda
  • A method that makes two strings.
  • A method that combines two strings.
  • A method that prints a string representation of an object.
  • A method that returns a string representation of an object.

Questão 5

Questão
What is a constructor?
Responda
  • A person who directs a choir or orchestra.
  • A person who builds buildings
  • A method used to set up an object upon its creation.
  • A method used to build a class.

Questão 6

Questão
How is a constructor called and how is it named?
Responda
  • It is called by java and is also named by java.
  • It is called by a line of code and is named by the author.
  • It is called by a line of code and shares the name of the class.
  • It is called via "new" and shares the name of the class.

Questão 7

Questão
A constructor can accept parameters if necessary.
Responda
  • True
  • False

Questão 8

Questão
What is the scope of a variable?
Responda
  • What the variable can apply to.
  • How many times the variable can be used.
  • The region of the program that the variable can be used within.
  • The accuracy of the variable.

Questão 9

Questão
What is an instance variable?
Responda
  • A variable that only is used once.
  • A copy of a variable that is given to each object.
  • A variable that only applies to one instance (object).
  • A copy of a variable that applies to all objects in a program.

Questão 10

Questão
A client should be aware of both the implementation details as well as the interface.
Responda
  • True
  • False

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