Java Standard Edition 5 and 6, Certified Associate Exam (1Z0-850) Free Practice Test

Question 1

Which two are valid? (Choose two.)

A. class EnumTest {
enum Days { Sat, Sun, Mon, Tue, Wed, Thu, Fri }
public static void main(String args[]) {
System.out.println(Days.Sat);
}

B. class EnumTest {
enum Colors { Red = 1, Green = 2, Blue = 4, Yellow = 8 }
public static void main(String args[]) {
System.out.println(Colors.Red);
}

C. class EnumTest {
public static void main(String args[]) {
enum Num { ONE, TWO, THREE, FOUR }
System.out.println(Num.ONE);
}

D. enum Suit { CLUBS, DIAMONDS, HEARTS, SPADES }
class EnumTest {
public static void main(String args[]) {
System.out.println(Suit.CLUBS);
}

Correct Answer: A,D

Question 2

Which two are true? (Choose two.)

A. Classes in the javax.swing package provide support for complex GUI components, such as tables and trees.

B. Classes in the java.awt package are used to paint objects on canvases.

C. Classes in the java.awt package inherit many behaviors from classes in the java.swing package.

D. Classes in the java.awt package are designed to provide lightweight components that work the same across different platforms.

Correct Answer: A,B

Question 3

Which type of primitive can be assigned a new value within a conditional expression?

A. char

B. boolean

C. int

D. byte

E. short

Correct Answer: B

Question 4

Which J2EE technology is used to generate dynamic content for web-based applications?

A. JMS

B. JAX-RPC

C. JNDI

D. SOAP

E. JSP

Correct Answer: E

Question 5

Which package contains the classes used to create a socket?

A. java.util

B. java.awt

C. javax.swing

D. java.net

E. java.io

F. java.lang

Correct Answer: D

Question 6

Which two are true about HTML? (Choose two.)

A. It is an object-oriented programming language.

B. It can be generated dynamically by servlets.

C. It contains APIs that are used to access data in an RDBMS.

D. It is used by the browser to display the client user interface.

Correct Answer: B,D

Question 7

Given:
2 . class Test {
3 . public static void main(String args[]) {
4 . for (int i = 1; i < 5; i++) {
5 . if (i == 2) {
6 . continue;
7 . }
8 . System.out.print(" i = " + i);
9 . }
1 0. }
1 1. }
What is the result?

A. i = 1 i = 2 i = 4 i = 5

B. i = 1 i = 3 i = 4 i = 5

C. i = 1 i = 2 i = 4

D. i = 1

E. Compilation fails.

F. The code runs with no output.

G. i = 1 i = 3 i = 4

Correct Answer: G

Question 8

What is true about JavaScript clients?

A. They CANNOT write to the client's hard drive.

B. They require Java Web Start technology to be deployed.

C. They must be hosted by J2EE containers.

D. They support all standard J2SE syntax.

Correct Answer: A

Question 9

Which two are associated with the business tier in a J2EE web-based application? (Choose two.)

A. HTML

B. stateless session beans

C. entity beans

D. JSP

E. servlets

Correct Answer: B,C

Question 10

Given:
3 . int calc() {
4 . long x = 40L;
5 . int i = 30;
6 . i = x;
7 . System.out.println("result is: " + i);
8 . }
What is the result of calling calc()?

A. result is: 40

B. Compilation fails because of an error at line 4.

C. result is: 30

D. Compilation fails because of an error at line 6.

Correct Answer: D

Question 11

Which is NOT a characteristic of Swing?

A. Swing components can be used to develop J2EE client applications.

B. Swing components are available in all web browsers.

C. Swing components can display a platform-specific "look and feel."

D. Swing components can display a platform-independent "look and feel."

Correct Answer: B

Question 12

Which two are represented in a UML class diagram? (Choose two.)

A. the interactions between objects in sequential order

B. relationships between classes and interfaces

C. ways to test an application

D. operations of classes and interfaces

Correct Answer: B,D

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Oracle Java Standard Edition 5 and 6, Certified Associate (1Z0-850) Free Practice Test