Java - Language Fundamentals
Java - Language Fundamentals
11. Which one is a valid declaration of a boolean?
- boolean b1 = 0;
- boolean b2 = 'false';
- boolean b3 = false;
- boolean b4 = Boolean.false();
12. Which three are valid declarations of a float?
float f1 = -343;
float f2 = 3.14;
float f3 = 0x12345;
float f4 = 42e7;
float f5 = 2001.0D;
float f6 = 2.81F;
float f1 = -343;
float f2 = 3.14;
float f3 = 0x12345;
float f4 = 42e7;
float f5 = 2001.0D;
float f6 = 2.81F;
- 1, 2, 4
- 2, 3, 5
- 1, 3, 6
- 2, 4, 6
13. Which is a valid declarations of a String?
- String s1 = null;
- String s2 = 'null';
- String s3 = (String) 'abc';
- String s4 = (String) '\ufeed';
14. What is the numerical range of a char?
- -128 to 127
- -(215) to (215) - 1
- 0 to 32767
- 0 to 65535