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Oracle 1Z0-501 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Concurrency | 10% | - Synchronization and thread safety - Thread creation and lifecycle |
| Flow Control and Exceptions | 15% | - Control structures
|
| Java API: java.lang | 15% | - String and StringBuffer - Math and Object class - Wrapper classes |
| Java I/O | 10% | - Reading/writing files and character encoding - File and stream classes |
| Object-Oriented Concepts | 20% | - Classes, inheritance, and interfaces
|
| Java Basics | 15% | - Language fundamentals
|
| Collections and Generics | 15% | - Generics fundamentals - Collection framework
|
Oracle Java Certified Programmer Sample Questions:
Given:
1 . switch (i){
2 . default:
3 . System.out.printIn("Hello");
4 . )
What is the acceptable type for the variable i?
- A. Float
- B. Long
- C. C and D
- D. A and B
- E. Byte
- F. Double
- G. Object
Given:
1. class super {
2. public float getNum() {return 3.0f;}
3 . )
4 .
5 . public class Sub extends Super {
6 .
7 .)
Which method, placed at line 6, will cause a compiler error?
- A. Public void getNum (double d)
{ } - B. Public float getNum(){return 4.0f; }
- C. Public double getNum (float d) {retrun 4.0f; }
- D. Public void getNum () { }
Which two construct an OutputSream that appends to the file "file.txt"? (Choose Two)
- A. FileOutputStream out=new FileOutputStream(new file("file.txt"));
- B. OutputStream out=new FileOutputStream("file.txt");
- C. FileOutputStream out=new FileOutputStream("file.txt", true);
- D. OutputStream out=new FileOutputStream(new File("file.txt")true);
- E. OutputStream out=new FileOutputStream("file.txt", "append");
Exhibit:
1 . package foo;
2 .
3 . import java.util.Vector;
4 .
5 . private class MyVector extends Vector {
6 . int i = 1;
7 . public MyVector(){
8 . i = 2;
9 .}
1 0. }
1 1.
1 2. public class MyNewVector extends MyVector {
1 3. public MyNewVector (){
1 4. i = 4;
1 5. }
1 6. public static void main (String args []){
1 7. MyVector v = new MyNewVector();
1 8.}
1 9. }
The file MyNewVector.java is shown in the exhibit.
What is the result?
- A. Compilation will fail at line 17.
- B. Compilation will fail at line 5.
- C. Compilation will fail at line 14.
- D. Compilation will fail at line 6.
- E. Compilation will succeed.
Given:
1. public class Foo {
2 . public static void main (String [] args){
3 .StringBuffer a = new StringBuffer ("A");
4 .StringBuffer b = new StringBuffer ("B");
5 .operate (a,b);
6 .system.out.printIn{a + "," +b};
7 . )
8 . static void operate (StringBuffer x, StringBuffer y){
9 .x.append {y};
1 0.y = x;
1 1.)
1 2.}
What is the result?
- A. The code compiles and prints "A,B".
- B. The code compiles and prints "AB,AB".
- C. The code compiles and prints "B,B".
- D. The code does not compile because "+" cannot be overloaded for StringBuffer.
- E. The code compiles and prints "A,A".
- F. The code compiles and prints "AB,B".
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