Corresponding wrapper class of float data type is

1. FLOAT
2. float
3. Float
4. Floating

What will be the output of the following code?

System.out.println("Lucknow".substring (0, 4));

1. Lucknow
2. Luckn
3. Luck
4. luck

The method to determine whether the specified char value is in uppercase or not.

1. toUpperCase(char)
2. toLowerCase(char)
3. isLowerCase(char)
4. isUpperCase(char)

Assertion (A) Method should be called explicitly either with object reference or class reference.
Reason (R) Method can be any user defined name.

1. Both Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A).
2. Both Assertion (A) and Reason (R) are true and Reason (R) is not a correct explanation of Assertion (A).
3. Assertion (A) is true and Reason (R) is false.
4. Assertion (A) is false and Reason (R) is true.