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Oracle 1Z0-501 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Java I/O | 10% | - File and stream classes - Reading/writing files and character encoding |
| Topic 2: Object-Oriented Concepts | 20% | - Classes, inheritance, and interfaces
|
| Topic 3: Flow Control and Exceptions | 15% | - Exception handling
|
| Topic 4: Concurrency | 10% | - Synchronization and thread safety - Thread creation and lifecycle |
| Topic 5: Java API: java.lang | 15% | - Wrapper classes - Math and Object class - String and StringBuffer |
| Topic 6: Collections and Generics | 15% | - Generics fundamentals - Collection framework
|
| Topic 7: Java Basics | 15% | - Language fundamentals
|
Oracle Java Certified Programmer Sample Questions:
Given:
1 . public class Test {
2 . public static void main (String []args){
3 . unsigned byte b = 0;
4 . b--;
5 .
6 .}
7 . }
What is the value of b at line 5?
- A. 127
- B. Compilation will succeed but the program will throw an exception at line 4.
- C. -1
- D. 255
- E. Compilation will fail.
Correct Answer: E 🗳️
Which two statements are true regarding the creation of a default constructor? (Choose Two)
- A. The default constructor initializes the instance variables declared in the class.
- B. When a class has only constructors with parameters, the compiler does not create a defaultconstructor.
- C. The default constructor initializes method variables.
- D. The compiler always creates a default constructor for every class.
- E. The default constructor invokes the no-parameter constructor of the superclass.
Correct Answer: A,B 🗳️
Which statement is true?
- A. If two threads are blocked in the wait method of one object, and another thread executes the notify method on the same object, then the first thread that executed the wait call first definitely resumes execution as a direct and sole consequence of the notify call.
- B. If only one thread is blocked in the wait method of an object, and another thread executes the modify on that same object, then the first thread immediately resumes execution.
- C. If a thread is blocked in the wait method of an object, and another thread executes the notify method on the same object, then the first thread definitely resumes execution as a direct and sole consequence of the notify call.
- D. If a thread is blocked in the wait method of an object, and another thread executes the notify method on the same object, it is still possible that the first thread might never resume execution.
Correct Answer: D 🗳️
Given:
1 . public class Foo implements Runnable (
2 . public void run (Thread t) {
3 . system.out.printIn("Running.");
4 . }
5 . public static void main (String[] args){
6 . new thread (new Foo()).start();
7 . )
8 . )
What is the result?
- A. The program exists without printing anything.
- B. An error at line 6 causes the compilation to fail.
- C. An exception is thrown.
- D. An error at line 1 causes compilation to fail.
- E. "Running" is printed and the program exits.
Correct Answer: D 🗳️
Exhibit:
1. class A {
2 . public int getNumber(int a) {
3 .return a + 1;
4 .}
5 .}
6 .
7 . class B extends A {
8 . public int getNumber (int a) {
9 . return a + 2
1 0. }
1 1.
1 2. public static void main (String args[]){
1 3. A a = new B();
1 4. System.out.printIn(a.getNumber(0));
1 5.}
1 6. }
What is the result?
- A. An error at line 14 causes compilation to fail.
- B. An error at line 8 causes compilation to fail.
- C. Compilation succeeds and 2 is printed.
- D. An error at line 13 causes compilation to fail.
- E. Compilation succeeds and 1 is printed.
Correct Answer: C 🗳️
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