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Java Data Types
Question 1
What is the default value of a boolean in Java?
- A
true
- B
false
- C
null
- D
0
Question 2
Which data type is best for storing the ASCII value of a character?
- A
char
- B
byte
- C
int
- D
short
Question 3
What will be the output of this code?
int a = 7;
double b = 2;
System.out.println(a / b);
- A
3
- B
3.5
- C
3.0
- D
Error
Question 4
Which of the following is a valid declaration of a float data type?
- A
float f = 10.5;
- B
float f = 10.5f;
- C
float f = "10.5";
- D
float f = (10.5);
Question 5
What will be the output of this code?
byte x = 127;
x++;
System.out.println(x);
- A
128
- B
127
- C
-128
- D
Compilation Error
Question 6
Which of the following combinations will NOT compile?
- A
long l = 100L;
- B
int i = 10000000000;
- C
double d = 1.2e3;
- D
short s = 100;
Question 7
What is the size of the char type in Java?
- A
8 bits
- B
32 bits
- C
16 bits
- D
Depends on the platform
Question 8
What will be printed by the following code?
float f = 5.6f;
int i = (int) f;
System.out.println(i);
- A
Compilation Error
- B
5.6
- C
6
- D
5
Question 9
What is the result of this code?
int a = 1_000_000;
float b = a;
System.out.println(b == a);
- A
true
- B
false
- C
Compilation Error
- D
Runtime Error
Question 10
What will be the output of the following code?
long l = 2147483648L;
int i = (int) l;
System.out.println(i);
- A
2147483648
- B
-2147483648
- C
Overflow
- D
Compilation Error
There are 10 questions to complete.
