1Z0-850 Exam Questions

Which two are true about stateless session beans? (Choose two.)

Which two are true about javax.swing? (Choose two.)

Given: 18. String s = " abcdcb a "; 19. int x = 2; 20. s = s.trim(); 21. if (s.length() < 8) { 22. x = s.indexOf('c', 3); 23. } 24. System.out.println("x = " + x); What is the resu...

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

Which is an appropriate description of session beans?

Which is NOT associated with the web tier in a J2EE web-based application?

Click the Exhibit button. Which, inserted at line 3 of the TestDrink class, demonstrates the "program to an interface" principle? 1. interface Drinkable { 2. void drink(); 3. } 1....

Given: Directory structure: projects |__src |__foo |__classes A file Clock.java in the /projects/src/foo directory The working directory /projects/src The class Clock in package fo...

Given concrete class B is a subclass of concrete class A, and class A implements interface C, which two are examples of polymorphism? (Choose two.)

Click the Exhibit button. Which code correctly implements the association between A and B?

What is true about JavaScript clients?

Which is a valid definition of an interface called Transportable given another valid interface, Movable?

Click the Exhibit button. Which class has a superclass relationship?

Which two symbols are used to indicate the visibility of an attribute in UML? (Choose two.)

Which two are valid examples of interface implementation? (Choose two.)

Given: 6. int time = 12; 7. if ( time < 12 ) { 8. System.out.println("Good morning"); 9. } 10. // insert code here 11. System.out.println("Good afternoon"); 12. } 13. else if ( tim...

Which two are true about the relationship "A keyboard has 101 keys."? (Choose two.)

Given: 14. class Dog { 15. String name; 16. public static void main(String [] args) { 17. Dog d1 = new Dog(); 18. Dog d2 = new Dog(); 19. d1.name = "Aiko"; 20. d2.name = "Aiko"; 21...

You have developed a MIDlet that runs on a Java-enabled Personal Digital Assistant (PDA) device. Now, your employer has asked you to port the MIDlet to run on other Java platforms....

Click the Exhibit button. Which two are true? (Choose two.) (Exhibit content: a diagram with 'Fooyo' and 'foo : int = 7')

Given: 17. class B { } Which demonstrates inheritance?

Given: 1. abstract class A { } 2. class B { } 3. interface C { } 4. interface D { } 5. // insert code here Which, inserted at line 5, results in a compilation failure?

Given: 5. // insert code here 6. public abstract void bark(); 7. } 8. // insert code here 9. public void bark() { 10. System.out.println("Woof"); 11. } 12. } 13. } Which, inserted...

Which of the following statements is true?

A J2EE programmer is developing components to encapsulate the business logic in a multitier web-based application. Which J2EE technology is appropriate?

Which two are true about the java and javac commands? (Choose two.)

Which option for javac sets the destination directory for class files?

Given: 1. public class Foo { 2. int size; 3. public static void main(String[] args) { 4. Foo f = new Foo(); 5. f.setSize(5); 6. Foo g = f.go(f); 7. System.out.print(f.size + " : "...

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

Given: 1. class Test { 2. public static void main(String args[]) { 3. int num1 = 10, num2 = 20, result; 4. result = calc(num1, num2); 5. System.out.println(result); 6. } 7. } 8. //...

Given: 1. public abstract class Wow { 2. private int wow; 3. public Wow(int wow) { 4. this.wow = wow; 5. } 6. public void wow() { } 7. private void wowza() { } 8. } Which is true a...

Given: 1. class X { 2. private Y y; 3. public X(Y y) { this.y = y; } 4. } 5. class Y { 6. private X x; 7. public Y() { } 8. public Y(X x) { this.x = x; } 9. } The instance variable...

Which type of J2EE component is used to store business data persistently?

What is the purpose of JNDI?

Given: 1. class Example { 2. int x = 50; 3. int y = 100; 4. public static void main(String args[]) { 5. int x = 0, y = 10; 6. Example ex = new Example(); 7. while (x < 3) { 8. x++;...

Which statement is true?

Which three are true? (Choose three.)

Which two, about a client's environment, can be determined by an applet? (Choose two.)

A Java developer needs to be able to send email, containing XML attachments, using SMTP. Which J2EE technology provides this capability?

Which two packages are used to create GUI programs in J2SE? (Choose two.)

Which two are benefits when appropriately using polymorphism? (Choose two.)

Which of the following packages are found in the Java Standard Library?

Which diagram best represents the relationship "A Dog has four Legs" based on the definitions of association and composition?

Given: 1. interface Flyer { 2. void takeoff(); 3. boolean land(); 4. } 5. class Airplane implements Flyer { 6. public void takeOff() { /* some code */ } 7. // insert code here 8. r...

Which statement about threading in Java is false?

You need an algorithm that must: - Iterate through an array of primitive integers - Print the value of each array element in index order - If the value of the element is equal to 1...

Given: 1. public enum Color { RED, YELLOW, GREEN } 2. enum Fruit { 3. Banana(Color.RED), 4. Apple(Color.YELLOW), 5. Kiwi(Color.GREEN); 6. private Color color; 7. Fruit(Color color)...

Which two are characteristics of an RDBMS? (Choose two.)

Which statement about java.util is incorrect?

Given: 1. class Exam { 2. private int num = 0; 3. public int getNum() { 4. return num; 5. } 6. } 7. public class Sample { 8. public static void main(String[] args) { 9. Exam e = ne...