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Oracle 1Z0-501 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Java API: java.lang | 15% | - Wrapper classes - Math and Object class - String and StringBuffer |
| Topic 2: Concurrency | 10% | - Thread creation and lifecycle - Synchronization and thread safety |
| Topic 3: Java Basics | 15% | - Language fundamentals
|
| Topic 4: Flow Control and Exceptions | 15% | - Exception handling
|
| Topic 5: Java I/O | 10% | - Reading/writing files and character encoding - File and stream classes |
| Topic 6: Object-Oriented Concepts | 20% | - Classes, inheritance, and interfaces
|
| Topic 7: Collections and Generics | 15% | - Collection framework
|
Oracle Java Certified Programmer Sample Questions:
Which two statements are true? (Choose Two)
- A. An anonymous inner class that is a direct subclass that is a direct subclass of Object can implementmultiple interfaces.
- B. Even if a class Super does not implement any interfaces, it is still possible to define an anonymous inner class that is an immediate subclass of Super that implements a single interface.
- C. An anonymous inner class can be declared inside of a method
- D. Event if a class Super does not implement any interfaces, it is still possible to define an anonymous inner class that is an immediate subclass of Super that implements multiple interfaces.
- E. An anonymous inner class constructor can take arguments in some situation.
Correct Answer: C,E 🗳️
The file "file.txt" exists on the file system and contsins ASCII text.
Given:
3 8. try {
3 9. File f = new File("file.txt");
4 0. OutputStream out = new FileOutputStream(f, true);
4 1. }
4 2. catch (IOException){}
What is the result?
- A. An exception is thrown because the file is not closed.
- B. The code runs and sets the length of the file to 0.
- C. The code runs and deletes the file from the file system.
- D. The code runs and no change is made to the file.
- E. The code does not compile.
Correct Answer: 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 might not always be the same on the same line(for example, "x=2, y=1").
- B. 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").
- C. Errors at lines 7 and 8 cause compilation to fail.
- D. 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").
Correct Answer: B 🗳️
Which two construct an OutputSream that appends to the file "file.txt"? (Choose Two)
- A. OutputStream out=new FileOutputStream("file.txt");
- B. FileOutputStream out=new FileOutputStream(new file("file.txt"));
- C. OutputStream out=new FileOutputStream(new File("file.txt")true);
- D. OutputStream out=new FileOutputStream("file.txt", "append");
- E. FileOutputStream out=new FileOutputStream("file.txt", true);
Correct Answer: C,E 🗳️
Exhibit:
1 . class super {
2 .public int getLength(){return 4;}
3 .}
4 .
5 . public class Sub extends Super {
6 .public long getLength() {return 5;}
7 .
8 . public static void main (String[]args){
9 .super sooper = new Super ();
1 0. Sub sub = new Sub();
1 1. System.out.printIn(
1 2.sooper.getLength()+ "," + sub.getLength()};
1 3.}
1 4. }
What is the output?
- A. 5, 4
- B. The code will not compile.
- C. 5, 5
- D. 4, 5
- E. 4, 4
Correct Answer: B 🗳️
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