Oracle 1Z0-850 Online Practice Questions and Exam Preparation

Oracle 1Z0-850 Online Questions & Answers

• Question 151:

  Given:

  5.

  // insert code here

  6.

  public void eat();

  7.

  }

  8.

  9.

  // insert code here

  10.

  public void eat() {

  11.

  System.out.println("eating dinner");

  12.

  }

  13.

  }

  Which, inserted at lines 5 and 9, allows the file to compile?

  A. 5. class Animal {9. public class Tiger implements Animal {
  B. 5. interface Animal {9. public class Tiger implements Animal {
  C. 5. class Animal {9. public class Tiger subclasses Animal {
  D. 5. interface Animal {9. public class Tiger extends Animal {
  E. 5. class Animal {9. public class Tiger extends Animal {
  F. 5. interface Animal {9. public class Tiger subclasses Animal {
  B. 5. interface Animal {9. public class Tiger implements Animal {

• Question 152:

  Which two are valid representations of operations in UML? (Choose two.)

  A. public void op(int param)
  B. + int op(int param)
  C. + op(param : int) : int
  D. - op(p : P) : P
  E. * op(param : int) : int
  C. + op(param : int) : int
  D. - op(p : P) : P

• Question 153:

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

  A. class Movable implements Transportable { /*...*/ }
  B. interface Transportable extends Movable { /*...*/ }
  C. class Movable extends Transportable { /*...*/ }
  D. interface Transportable implements Movable { /*...*/ }
  B. interface Transportable extends Movable { /*...*/ }

• Question 154:

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

  

  A. class A {private B[] b;}class B {private A a;}
  B. class A {private B[] b;}class B { }
  C. class A { }class B {private A[] a;}
  D. class A { }class B {private A a;}
  E. class A {private B b;}class B {private A[] a;}
  F. class A {private B b;}class B { }
  B. class A {private B[] b;}class B { }

• Question 155:

  What is the role of a JSP author?

  A. to coordinate the interaction between all the pages in a complex dynamic web-based application
  B. to write Java code to implement business logic
  C. to put static data and dynamic content together to create dynamic web pages
  D. to write Java code that interacts with server-side objects
  C. to put static data and dynamic content together to create dynamic web pages

• Question 156:

  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. Which is true?

  A. The MIDlet is NOT guaranteed to run on a Java technology-enabled phone.
  B. The MIDlet can run within a standard web browser.
  C. The MIDlet is 100% portable across all J2ME devices.
  D. The MIDlet is guaranteed to run correctly under J2SE.
  A. The MIDlet is NOT guaranteed to run on a Java technology-enabled phone.

• Question 157:

  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.

  if (d1 == d2) System.out.print("== ");

  22.

  if (d1.equals(d2)) System.out.println("dot =");

  23.

  }

  24.

  }

  What is the result?

  A. == dot =
  B. Compilation fails.
  C. dot =
  D. No output is produced.
  E. ==
  F. The result is unpredictable.
  D. No output is produced.

• Question 158:

  Given:

  1.

  class Variables {

  2.

  int i;

  3.

  String s;

  4.

  Object o;

  5.

  String g = null;

  6.

  Integer y;

  7.

  char c;

  8.

  }

  Which four are object references? (Choose four.)

  A. c
  B. i
  C. s
  D. g
  E. y
  F. o
  C. s
  D. g
  E. y
  F. o

• Question 159:

  Which protocol provides an XML-based, platform-independent means of exchanging structured information?

  A. UDDI
  B. WSDL
  C. JSP
  D. JNDI
  E. SOAP
  E. SOAP

• Question 160:

  Which is true about MIDlets?

  A. MIDlet devices are not required to allow applications to be uninstalled.
  B. The only API used to create MIDlets is the MIDP API.
  C. Devices that support MIDlets must allow the MIDlets to access the device's low-level functions.
  D. Devices that run MIDlets must provide software that manages wireless downloading of applications.
  D. Devices that run MIDlets must provide software that manages wireless downloading of applications.