Test Preparation on Data Types, Variables and Arrays-1

What is the range of short data type in Java?

1-128 to 127
2-32768 to 32767
3-2147483648 to 2147483647
4None of the mentioned

Explanation: Short occupies 16 bits in memory. Its range is from -32768 to 32767.

What is the range of byte data type in Java?

Explanation: Byte occupies 8 bits in memory. Its range is from -128 to 127.

Which of the following are legal lines of Java code?

   1. int w = (int)888.8;
   2. byte x = (byte)100L;
   3. long y = (byte)100;
   4. byte z = (byte)100L;

11 and 2
22 and 3
33 and 4
4All statements are correct

Explanation: Statements (1), (2), (3), and (4) are correct. (1) is correct because when a floating-point number (a double in this case) is cast to an int, it simply loses the digits after the decimal. (2) and (4) are correct because a long can be cast into a byte. If the long is over 127, it loses its most significant (leftmost) bits. (3) actually works, even though a cast is not necessary, because a long can store a byte.

An expression involving byte, int, and literal numbers is promoted to which of these?

1int
2long
3byte
4float

Explanation: An expression involving bytes, ints, shorts, literal numbers, the entire expression is promoted to int before any calculation is done.

Which of these literals can be contained in float data type variable?

1-1.7e+308
2-3.4e+038
3+1.7e+308
4-3.4e+050

Explanation: Range of float data type is -(3.4e38) To +(3.4e38)

What is the range of short data type in Java?

What is the range of byte data type in Java?

Which of the following are legal lines of Java code?

1. int w = (int)888.8; 2. byte x = (byte)100L; 3. long y = (byte)100; 4. byte z = (byte)100L;

An expression involving byte, int, and literal numbers is promoted to which of these?

Which of these literals can be contained in float data type variable?

Check your progress:


Right Ans	Wrong Ans	Not Attempted

Test Preparation on Data Types, Variables and Arrays-1

What is the range of short data type in Java?

What is the range of byte data type in Java?

Which of the following are legal lines of Java code? 1. int w = (int)888.8; 2. byte x = (byte)100L; 3. long y = (byte)100; 4. byte z = (byte)100L;

An expression involving byte, int, and literal numbers is promoted to which of these?

Which of these literals can be contained in float data type variable?

Check your progress:

Which of the following are legal lines of Java code?

1. int w = (int)888.8; 2. byte x = (byte)100L; 3. long y = (byte)100; 4. byte z = (byte)100L;