Question

___________ is a special constant that is not an object but can be used to give a value to any variable of class type.


a. void
b. this
c. null
d. false

Answer 1

That's C

Answer 2

I would agree with @mnecochear , NULL is a special constant used to give a value of "nothing" to basically any variable.

Answer 3

Explain the "public" keyword in public static void main(String args[]) method in Java
Answer
a. You need not have an instance of the class to access the method
b.The method can be accessed outside the class / package
c.Your application need not return a value, as the JVM launcher would return the value when it exits
d.This is the entry point for the application

Answer 4

Think about what the name implies.

Answer 5

It's b. These are called access modifiers and determine where the method can be used.
Other examples are private, protected, etc

Answer 6

:D

Answer 7

Select the four correct answers.
Answer
1. A Java program must have a package statement.
2. A package statement if present must be the first statement of the program (barring any comments).
3. If a Java program defines both a package and import statement, then the import statement must come before the package statement.
4. An empty file is a valid source file.
5. A Java file without any class or interface definitions can also be compiled.
6. If an import statement is present, it must appear before any class or interface definitions.


i choose 1,2,3 and 6 but not sure

Answer 8

I would think about #1 a little more. What is the "package" statement used for?