1Z0-811 Java Language Fundamentals 5

Question 1

Which of the following is true about local variables in Java?

Accepted Answer

They must be explicitly initialized before use

Answer

They are initialized to 0 by default

Answer

They are accessible from other methods

Answer

They persist between method calls

Question 2

What is the output of the following?

int[] arr = {5, 10, 15};
System.out.println(arr.length);

Accepted Answer

3

Answer

2

Answer

4

Answer

Compilation error

Question 3

Which of the following correctly describes a labeled break statement?

Accepted Answer

It breaks from a specified outer loop

Answer

It breaks only from the innermost loop

Answer

It restarts the labeled loop from the beginning

Answer

It is not supported in Java

Question 4

What does the following evaluate to?

10 == 10.0

Accepted Answer

true, after numeric promotion

Answer

false, types don't match

Answer

Compilation error

Answer

false, int and double are incompatible

Question 5

Which of the following is true about the 'static' keyword on a variable?

Accepted Answer

It creates a class-level variable shared by all instances

Answer

It creates a variable local to each object instance

Answer

It prevents the variable from being modified

Answer

It makes the variable accessible only within the same package

Question 6

What is printed by this code?

int i = 10;
do {
  System.out.print(i + " ");
  i--;
} while (i > 10);

Accepted Answer

10

Answer

Nothing is printed

Answer

10 9 8 ...

Answer

Infinite loop

Question 7

Which of the following is a correct way to declare a constant in Java?

Accepted Answer

final int MAX = 100;

Answer

const int MAX = 100;

Answer

static int MAX = 100;

Answer

immutable int MAX = 100;