1Z0-811 Java Language Fundamentals 4

Question 1

Which of the following is true about Java's 'char' data type?

Accepted Answer

It is an unsigned 16-bit integer

Answer

It is a signed 16-bit integer

Answer

It is an 8-bit integer

Answer

It is a 32-bit Unicode character

Question 2

What is the output of this code?

int x = 0;
while (x < 5) {
  x += 2;
}
System.out.println(x);

Accepted Answer

6

Answer

4

Answer

5

Answer

0

Question 3

Which operator is used for bitwise AND in Java?

Accepted Answer

&

Answer

&&

Answer

|

Answer

^

Question 4

What is the scope of a variable declared inside a for-loop initializer?

Accepted Answer

Only the loop block and update expression

Answer

The entire method

Answer

The entire class

Answer

Only the loop body, not the condition

Question 5

What is the output of the following?

System.out.println("Value: " + 1 + 2);

Accepted Answer

Value: 12

Answer

Value: 3

Answer

Value: 1 2

Answer

Compilation error

Question 6

Which of the following correctly initializes a String using the string pool?

Accepted Answer

String s = "hello";

Answer

String s = new String("hello");

Answer

String s = String.valueOf("hello");

Answer

String s = new String();

Question 7

What is the output of this code?

boolean b = true;
System.out.println(b ? "yes" : "no");

Accepted Answer

yes

Answer

no

Answer

true

Answer

Compilation error