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Oracle 1Z0-501 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Object-Oriented Concepts | 20% | - Classes, inheritance, and interfaces
|
| Topic 2: Java API: java.lang | 15% | - Wrapper classes - Math and Object class - String and StringBuffer |
| Topic 3: Java I/O | 10% | - File and stream classes - Reading/writing files and character encoding |
| Topic 4: Java Basics | 15% | - Language fundamentals
|
| Topic 5: Collections and Generics | 15% | - Generics fundamentals - Collection framework
|
| Topic 6: Concurrency | 10% | - Thread creation and lifecycle - Synchronization and thread safety |
| Topic 7: Flow Control and Exceptions | 15% | - Exception handling
|
Oracle Java Certified Programmer Sample Questions:
Which two interfaces provide the capability to store objects using a key-value pair?
(Choose Two)
- A. Java.util.List.
- B. Java.util.StoredMap.
- C. Java.util.StoredSet.
- D. Java.util.Collection.
- E. Java.util.Set.
- F. Java.util.Map.
Given:
1 . public class X (
2 . public object m () {
3 . object o = new float (3.14F);
4 . object [] oa = new object [1];
5 . oa[0]= o;
6 . o = null;
7 . return oa[0];
8 . }
9 . }
When is the float object created in line 3, eligible for garbage collection?
- A. Never in this method.
- B. Just after line 5
- C. Just after line 7 (that is, as the method returns)
- D. Just after line 6
Which constructs a DataOutputStream?
- A. New dataInputStream(new InputStream("in.txt"));
- B. New dataInputStream(new writer("in.txt"));
- C. New dataInputStream(new FileInputStream("in.txt"));
- D. New dataInputStream(new file("in.txt"));
- E. New dataInputStream("in.txt");
- F. New dataInputStream(new FileWriter("in.txt"));
Given:
1 .public class ForBar {
2 .public static void main(String []args){
3 .int i = 0, j = 5;
4 .tp: for (;;){
5 .i ++;
6 .for(;;)
7 .if(i > --j) break tp;
8 .}
9 .system.out.printIn("i = " + i + ", j = "+ j);
1 0.}
1 1.}
What is the result?
- A. An error at line 7 causes compilation to fail.
- B. The program runs and prints "i=1, j=4"
- C. The program runs and prints "i=3, j=0"
- D. An error at line 4 causes compilation to fail.
- E. The program runs and prints "i=1, j=0"
- F. The program runs and prints "i=3, j=4"
Which can be used to decode charS for output?
- A. Java.io.InputStreamWriter.
- B. Java.io.InputStreamReader.
- C. Java.io.EncodedReader.
- D. Java.io.InputStream.
- E. Java.io.BufferedInputStream.
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