Which of the following is a Java keyword? class < object variable method What en
ID: 3637968 • Letter: W
Question
Which of the following is a Java keyword?class <
object
variable
method
What enables you to view the output of a Java program?
Javab
Javac
Java <
Javadoc
Which type of data type can be used for an identifier?
letters
numbers
special characters
all the above <
What are placeholders in Java?
identifiers
data types
variables <
keywords
What does intdata type represent?
integer <
char
string
double
You can create an object for which of the following?
class
interface <
variable
method
What does /*.....*/ represent?
single line comment <
multi-line comment
What will an interface have?
description of methods <
definition and declaration of methods
only declaration of methods
only variables
You include Methods inside a _______.
class
object <
interface
variable
For which of the following do you not need to create an object?
comments <
interface
static method
variables
Explanation / Answer
1) Which of the following is a Java keyword?
Answer: class
Only "class" is a keyword in Java.
2) What enables you to view the output of a Java program?
Answer: java
java is the Java application launcher;
javac is the Java compiler;
javadoc is the API documentation generator
3) Which type of data type can be used for an identifier?
Answer: All the above
An identifier can be composed of letters, numbers, and special characters (if your teacher defined them as '_' or '$')
Note: an identifier cannot start with a number!
4) What are placeholders in Java?
Answer: variables
Variables are used as a placeholder for different values
Generally speaking a placeholder means something else in Java.
5) What does int data type represent?
Answer: integer
an int represents a 32-bit integer in Java
6) You can create an object for which of the following?
Answer: Interface (this question is ambiguous)
You can create an object for a given class as well, that question is not very clear.
7) What does /*.....*/ represent?
Answer: multi-line comment
/* is the opening of a multi-line comment which spans until a */ is reached.
// is a single line comment
8) What will an interface have?
Answer: description of methods
An interface describes that kind of methods any class implementing it should have. No declarations are allowed.
9) You include Methods inside a _______.
Answer: class
You include methods inside a class, which is a blueprint for an object.
An object is just an instance of that class.
10) For which of the following do you not need to create an object?
Answer: static methods (and Comments! Duh)
Static methods should be invoked in a static way - without using an object but rather the class name.
Comments are for an obvious reason.
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