Which of these best describes a variable?

An allocation of memory which holds a single value of a datatype

Which of the following best describes Abstraction?

Removing unnecessary details to focus on relevant traits & behaviours

What is a key rule, when working with Arrays?

Must define its size before we can use it

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Questions 20

Answers

1
Which class from the Java Library can be used to format output as a currency?
Scanner
CurrencyFormat
Format
DecimalFormat
2
Look at the code below, what term is used to describe the use of the plus symbol & variable in this context?
Abstraction
Appending
Concatenation
Joining
3
Why do we use getters and setters to access/manipulate instance variables?
Because of encapsulation
Because of constructors
Because of dynamic binding
Because of abstraction
4
What is the official term for creating an object?
Inheritance
Instantiation
Initialisation
Implementation
5
Which of the following is NOT an example of a conditional statement?
IF...ELSE
IF
Switch
Scanner
6
What does the A in APIE stand for?
Administration
Authorisation
Authentication
Abstraction
7
A standard method will run by itself
True
False
8
What is the goal of encapsulation?
To describe the object
To create the object
To protect the object
To save the object
9
What is the acronym used to identify the main concepts of Object Oriented Programming
SMART
COBOL
APIE
UML
10
What does a constructor do?
Creates an object of the class
Signals that a method may or may not return a variable
Tells which other methods can call the method
Tells what variables a method accepts
11
What does the E stand for in APIE?
Engagement
Ease of Use
Exception
Encapsulation
12
What is the starting point of a program?
Main Method
The Class
Menu Method
The Constructor
13
Which of these terms can be used when creating a variable but assigning it no value?
Declare
Initialise
Recursion
Instantiation
14
What is the output of this program?
"My name is Sam"
"My name is John"
"My name is name"
"My name is Bob"
15
Which of these best describes a variable?
An allocation of memory which holds a single value of a datatype
A database field which holds a single value of a datatype
An allocation of the database used to store a single value of a datatype
An allocation of storage which holds a single value of a datatype
16
Which of the following is NOT a datatype
Char
Text
Float
Double
17
Which of the following best describes Abstraction?
Details broken up from a problem
Removing unnecessary details to focus on relevant traits & behaviours
quality of dealing with ideas rather events
Sunny Day Scenario
18
What is a key rule, when working with Arrays?
Must define its size before we can use it
We must import it in from the Java Library
We must use diamond notation to define its contents
We need to use .add() to add items into the Array
19
A constructor must
have values passed in
include void
share same name as class
be static
20
What does a constructor do?
Tells what variables a method accepts
Tells which other methods can call the method
Signals that a method may or may not return a variable
Creates an object of the class

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