This is the java programming questions and answers section on "Data Types" with explanation for various interview, competitive examination and entrance test. Solved examples with detailed answer description, explanation are given and it would be easy to understand.
1. What is the range of data type short in Java?
- A. -128 to 127
- B. -32768 to 32767
- C. -2147483648 to 2147483647
- D. None of the mentioned
Answer: Option B
Explanation:
Short occupies 16 bits in memory. Its range is from -32768 to 32767.
2. What is the range of data type byte in Java?
- A. -128 to 127
- B. -32768 to 32767
- C. -2147483648 to 2147483647
- D. None of the mentioned
Answer: Option A
Explanation:
Byte occupies 8 bits in memory. Its range is from -128 to 127.
3. An expression involving byte, int, and literal numbers is promoted to which of these?
Answer: Option A
Explanation:
An expression involving bytes, ints, shorts, literal numbers, the entire expression is promoted to int before any calculation is done.
4. Which of these literals can be contained in a data type float variable?
- A. 1.7e-308
- B. 3.4e-038
- C. 1.7e+308
- D. 3.4e-050
Answer: Option B
Explanation:
Range of data type float is 3.4e-038 to 3.4e+308.
5. Which data type value is returned by all transcendental math functions?
Answer: Option C
Explanation:
double
