Java Basic Day-2

which of the following is a legal identifier in java?

• 2variable

• #myvar

• +@$var

• $_myvar

which of these is NOT a valid keyword or reserved word in java?

• default

• null

• String

• volatile

which is the legal range of values fro a short?

• -128 to +127

• -255 to 255

• -32768 to 32767

• 0 to 65535

which declaration of the main() method is valid?

• public void main(String args[])

• public void static main(String args[])

• final public static void main(String []arr)

• public static void main(String []arr)

Is 3*4 equivalent to 3 << 2 ?

• Yes

• NO

what will be the output?

public class Test

{

public static void main(String[] args) {

double d=100.04;

float f=d;

System.out.println(""+f);

}

}

• 100.04

• 100.0

• 100

• Compilation Error

Which Operator will always evaluate all the operands ?

• ||

• &&

• ?:

• %

Which of these is long data type literal?

• 0x99fffL

• ABCDEFG

• 0x99fffa

• 99671246

Which of these can not be used for a variable name in Java?

• identifier

• keyword

• identifier & keyword

• none of the mentioned

What will be the error in the following Java code?

byte b = 50;

b = b * 50;

• b cannot contain value 100, limited by its range

• * operator has converted b * 50 into int, which can not be converted to byte without casting

• b cannot contain value 50

• No error in this code