Java Exam The Best
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- 1.What is the file extension of a java source program ?
- A.
Class
- B.
Obj
- C.
Java
- D.
Bin
- 2.You can recognise a constructor of a class because:
- A.
It has the same name as the class and no return type
- B.
It has the same name as the class and a void return type
- C.
It has the same name as the class and an int return type
- D.
It has an extended name from the class and no return type
- 3.The primary function of a constructor is to
- A.
Put a class together on the stack and return a pointer to itself
- B.
Contruct all the code that a class can execute and return void
- C.
Make a memory copy of a class and return a pointer to that instance
- D.
Respond to the user that the class is ready to use no pointers involved
- 4.The place where classes are stored and manipulated is called a
- A.
Pile
- B.
Stack
- C.
Store
- D.
Heap
- 5.A constructor is called with the keyword
- A.
new
- B.
Old
- C.
This
- D.
There
- 6.How many constructors can a class have ?
- A.
None but the system will provide one
- B.
As many as required
- C.
Only one
- D.
Only two
- 7.Whta is the access scope of a variable declared inside a method block
- A.
The whole java class that method is in
- B.
Only from within that method
- C.
The whole java file that method is in
- D.
From any other java file.
- 8.What is the first line of the first method executed in a java application:
- A.
Public void main (String args) {
- B.
Public static void main ( String args) {
- C.
Public static main (String args) {
- D.
Static void main (String args {
- 9.Java swing windows applications generally extend JFrame because
- A.
JFrame is a bigger class than JPanel
- B.
JFrame cannot be extended so we never use it
- C.
JFrame put a frame around a DOS window
- D.
The language developers have already prepared JFrame with many useful methods
- 10.How many bits does an int primitive variable have ?
- A.
64
- B.
32
- C.
16
- D.
8
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