Java Programming MCQ Question with Answer

Java Programming MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

Question No : 36
Which are the valid ways to create DataInputStream streams?

new DataInputStream(new File("in.dat"));

new DataInputStream(new FileInputStream("in.dat"));

new DataInputStream("in.dat");

new DataInputStream("in.data","r");

Question No : 37
Which exception is thrown by the read() method of InputStream class?

IOException

FileNotFoundException

ReadException

None of the above

Question No : 38
In the code below, what data types the variable x can have?

byte b1 = 5;

byte b2 = 10;

x = b1 * b2;

int short

Question No : 39
If you want to assign a value of 99 to the variable year, then which of the following lines can be used within an <applet> tags?

number=getParameter(99)

<number==99>

Question No : 40
What is java -g used for?

Using the jdb tool

Executing a class with optimization turned off

To provided information about deprecated methods

Non of the above

Question No : 41
With javadoc, which of the following denotes a javadoc comment?

//#

/**

//**

Question No : 42
Give file is a file object, which of the following are legal statements to create a new file.

file.create();

FileOutputStream fos=new FileOutputStream(file);

FileInputStream fis=new FileInputStream(file);

all of the above