Online Access Free 1Z0-850 Practice Test

You need to create a class that maintains a customer's account balance. The class must allow both credits (deposits) and debits (withdrawals) to the account.
Which class correctly implements this functionality?

• A.public class Account {
  double balance;
  public void debit(double amount) {
  balance = balance - amount;
  }
  public void credit(double amount) {
  balance = balance + amount;
  }
• B.public class Account {
  double balance;
  public void debit() {
  double debit;
  balance = balance - debit;
  }
  public void credit() {
  double credit
  balance = balance + credit;
  }
• C.public class Account {
  public void debit(double amount) {
  double balance;
  balance = balance - amount;
  }
  public void credit(double amount) {
  double balance;
  balance = balance + amount;
  }
• D.public class Account {
  double balance;
  public void debit(double amount) {
  amount = balance - amount;
  }
  public void credit(double amount) {
  amount = balance + amount;
  }
• E.public class Account {
  double balance;
  balance = balance - amount;
  }
  public void credit(double amount) {
  double balance;
  balance = balance + amount;
  }

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

Click the Exhibit button. Which class correctly implements the interface Flyer?

• A.Penguin
• B.Helicopter
• C.Airplane
• D.Lark

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

• A.It is an object-oriented programming language.
• B.It contains APIs that are used to access data in an RDBMS.
• C.It can be generated dynamically by servlets.
• D.It is used by the browser to display the client user interface.

Given:
5 . // insert code here
6 . public void eat();
7 . }
8 .
9 . // insert code here
1 0. public void eat() {
1 1. System.out.println("eating dinner");
1 2. }
1 3. }
Which, inserted at lines 5 and 9, allows the file to compile?

• A.5. interface Animal {
  9 . public class Tiger subclasses 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. class Animal {
  9 . public class Tiger implements Animal {