Core Java : Basics

1. Which of these is not a valid keyword or reserved word in Java?

this
null
transient
string

2. Which of the following is a valid key word in java?

assert
sum
count
None of the above

3. Which of the following is a primitive data type in java?

class
long
array
enum

4. What is the size of long data type in java

1 byte
4 bytes
8 bytes
16 bytes

5. Which of the following is an incorrect declaration of char?

char c1 = 064770;
char c2 = 'hello';
char c3 = 0fget;
char c4 = '\uface';

6. Which of the following is a reference data type in Java?

interface
char
int
long

7. What is the default value of double?

0.0
0
0.d
0.0d

8. In Java, by default all the integer literals are treated as ________?

int
double
short
float

9. In Java, by default all the floating literals are treated as ________?

float
short
double
int

10. Which of the following statement is/are true for automatic type casting?

Converts bigger data type into smaller data type
Converts smaller data type into bigger data type
Both
None of the above