JAVA Test Prep - Exploring javalang & javaio - 1

Test Preparation on JAVA Test Prep. - Exploring java.lang & java.io - 1

1.

Which of these classes is not included in java.lang?

1Byte
2Integer
3Array
4Class

Explanation: Array class is a member of java.util.

2.

Which of these is a process of converting a simple data type into a class?

1type wrapping
2type conversion
3type casting
4none of the Mentioned

3.

Which of these is a super class of wrappers Double & Integer?

1Long
2Digits
3Float
4Number

Explanation: Number is an abstract class containing subclasses Double, Float, Byte, Short, Integer and Long.

4.

Which of these is a wrapper for simple data type float?

1float
2double
3Float
4Double

5.

Which of the following is a method of wrapper Float for converting the value of an object into byte?

10 byte value()
2byte byte Value()
3Byte value()
4Byte Bytevalue()

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