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Oracle 1Z0-501 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Core Java APIs | - Collections and Utilities
|
| Exception Handling | - Exceptions
|
| Object-Oriented Programming | - Classes and Objects
|
| Concurrency | - Threads
|
| Java Language Fundamentals | - Language Basics
|
| Input and Output | - I/O APIs
|
Oracle Java Certified Programmer Sample Questions:
Which statement is true for the class java.util.HashSet?
- A. The elements in the collection are guaranteed to be unique.
- B. The elements in the collection are ordered.
- C. The elements in the collections are guaranteed to be synchronized.
- D. The elements in the collection are accessed using a unique key.
- E. The collection is guaranteed to be immutable.
Correct Answer: A 🗳️
Which method is an appropriate way to determine the cosine of 42 degrees?
- A. Double d = Math.cosine(42);
- B. Double d = Math.cos(Math.toDegrees(42));
- C. Double d = Math.cosine(Math.toRadians(42));
- D. Double d = Math.cos(42);
- E. Double d = Math.cos(Math.toRadians(42));
Correct Answer: E 🗳️
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 "B,B".
- C. The code compiles and prints "A,A".
- D. The code compiles and prints "AB,B".
- E. The code compiles and prints "AB,AB".
- F. The code does not compile because "+" cannot be overloaded for StringBuffer.
Correct Answer: D 🗳️
Which two are equivalent? (Choose Two)
- A. 3<2
- B. 3<<2
- C. 3<<<2
- D. 3*2^2
- E. 3/2
- F. 3*4
Correct Answer: B,F 🗳️
What writes the text "<end>" to the end of the file "file.txt"?
- A. OutputStream os= new OutputStream ("file.txt", true);
DataOutputStream out = new DataOutputStream(os); out.writeBytes ("<end>/n"); - B. OutputStream out= new FileOutputStream ("file.txt");
Out.writeBytes ("<end>/n"); - C. OutputStream os= new FileOutputStream ("file.txt");
DataOutputStream out = new DataOutputStream(os); out.writeBytes ("<end>/n"); - D. OutputStream os= new FileOutputStream ("file.txt", true);
DataOutputStream out = new DataOutputStream(os); out.writeBytes ("<end>/n");
Correct Answer: D 🗳️
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