1z0-808 Free Practice Test

Given the code fragment:

What is the result?

1. A. An exception is thrown at runtim
2. B. 07-31-2014
3. C. 2014-07-31
4. D. 2014-09-30

Correct Answer: A

Which one of the following code examples uses valid Java syntax?

1. A. Option A
2. B. Option B
3. C. Option C
4. D. Option D

Correct Answer: A

Given:
<>

1. A. BaseDerivedA
2. B. BaseDerivedB
3. C. DerivedBDerivedB
4. D. DerivedBDerivedA
5. E. A ClassCastException is thrown at runtime.

Correct Answer: D

This grid shows the state of a 2D array:
< ><>>< ><>

1. A. grid[2][1] = ‘X’;
2. B. grid[3][2] = ‘X’;
3. C. grid[3][1] = ‘X’;
4. D. grid[2][3] = ‘X’;

Correct Answer: D

Which statement is true about Java byte code?

1. A. It can run on any platform.
2. B. It can run on any platform only if it was compiled for that platform.
3. C. It can run on any platform that has the Java Runtime Environment.
4. D. It can run on any platform that has a Java compiler.
5. E. It can run on any platform only if that platform has both the Java Runtime Environment and a Java compiler.

Correct Answer: D
Java bytecodes help make "write once, run anywhere" possible. You can compile your program into bytecodes on any platform that has a Java compiler. The bytecodes can then be run on any implementation of the Java VM. That means that as long as a computer has a Java VM, the same program written in the Java programming language can run on Windows 2000, a Solaris workstation, or on an iMac.