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Oracle 1Z0-501 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Collections and Generics | 15% | - Collection framework
|
| Object-Oriented Concepts | 20% | - Classes, inheritance, and interfaces
|
| Concurrency | 10% | - Synchronization and thread safety - Thread creation and lifecycle |
| Flow Control and Exceptions | 15% | - Control structures
|
| Java I/O | 10% | - Reading/writing files and character encoding - File and stream classes |
| Java Basics | 15% | - Language fundamentals
|
| Java API: java.lang | 15% | - Wrapper classes - String and StringBuffer - Math and Object class |
Oracle Java Certified Programmer Sample Questions:
Which two demonstrate an "is a" relationship? (Choose Two)
- A. public interface Color { }
public class Employee extends Color { } - B. public class Species { }
public class Animal (private Species species;) - C. public interface Shape { }
public class Employee extends Shape { } - D. public interface Person { }
public class Employee extends Person { } - E. interface Component { }
Class Container implements Component (
Private Component[ ] children;
)
Correct Answer: B,E 🗳️
Exhibit:
1 . public class X implements Runnable(
2 . private int x;
3 . private int y;
4 .
5 . public static void main(String[]args)
6 . X that = new X();
7 .(new Thread(that)).start();
8 .(new Thread(that)).start();
9 .)
1 0.
1 1. public void run()(
1 2. for (;;)(
1 3. x++;
1 4. y++;
1 5. System.out.printIn("x=" + x + ", y = " + y);
1 6.)
1 7.)
1 8.)
What is the result?
- A. The program prints pairs of values for x and y that are always the same on the same line (forexample, "x=1, y=1". In addition, each value appears twice (for example, "x=1, y=1" followed by"x=1, y=1").
- B. Errors at lines 7 and 8 cause compilation to fail.
- C. The program prints pairs of values for x and y that might not always be the same on the same line(for example, "x=2, y=1").
- D. The program prints pairs of values for x and y that are always the same on the same line (for example, "x=1, y=1". In addition, each value appears only for once (for example, "x=1, y=1" followed by "x=2, y=2").
Correct Answer: D 🗳️
Which statement is true?
- A. An anonymous inner class can access final variables in any enclosing scope.
- B. Construction of an instance of a static inner class requires an instance of the enclosing outer class.
- C. An anonymous inner class can implement multiple interfaces.
- D. An anonymous inner class may be declared as final.
- E. An anonymous inner class can be declared as private.
Correct Answer: A 🗳️
Which two statements are true? (Choose Two)
- A. An anonymous inner class can extend an abstract class.
- B. An anonymous inner class can be declared as protected.
- C. An anonymous inner class can be declared as public.
- D. An inner class may be declared as static.
- E. An anonymous inner class can be declared as private.
Correct Answer: A,D 🗳️
Given:
1 . public class test(
2 . public static void main(string[]args){
3 . string foo = args [1];
4 . string foo = args [2];
5 . string foo = args [3];
6 . }
7 .}
And command line invocation:
Java Test red green blue
What is the result?
- A. Bax has the value of "green"
- B. Baz has the value of null
- C. Baz has the value of "blue"
- D. The code does not compile.
- E. Baz has the value of "red"
- F. The program throws an exception.
- G. Baz has the value of ""
Correct Answer: F 🗳️
