Get All Java SE 17 Developer Exam Questions with Validated Answers
| Vendor: | Oracle |
|---|---|
| Exam Code: | 1Z0-829 |
| Exam Name: | Java SE 17 Developer |
| Exam Questions: | 50 |
| Last Updated: | April 12, 2026 |
| Related Certifications: | Oracle Java |
| Exam Tags: |
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Given the directory structure:
Given the definition of the Doc class:
Which two are valid definition of the wordDoc class?
Given the code fragment:
Which code fragment invokes all callable objects in the workers set?
A)
B)
C)
D)
Given the code fragment:
abstract sealed interface SInt permits Story, Art { default String getTitle() { return "Book Title" ; }
}
Which set of class definitions compiles?
The answer is C because the code fragment given is an abstract sealed interface SInt that permits Story and Art. The correct answer is option C, which is a sealed interface Story that extends SInt and a non-sealed class Art that implements SInt. This is because a sealed interface can only be extended by the classes or interfaces that it permits, and a non-sealed class can implement a sealed interface.
Option A is incorrect because interface is misspelled as interace, and Story and Art should be capitalized as they are the names of the permitted classes or interfaces.
Option B is incorrect because public is misspelled as public, and sInd should be SInt as it is the name of the sealed interface.
Option D is incorrect because a non-sealed interface cannot extend a sealed interface, as it would violate the restriction of permitted subtypes.
Option E is incorrect because both Story and Art cannot be non-sealed interfaces, as they would also violate the restriction of permitted subtypes.
Oracle Certified Professional: Java SE 17 Developer
OCP Oracle Certified Professional Java SE 17 Developer Study Guide
Given the content of the in. tart file:
23456789
and the code fragment:
What is the content of the out .txt file?
The answer is D because the code fragment reads the content of the in.txt file and writes it to the out.txt file. The content of the in.txt file is ''23456789''. The code fragment uses a char array buffer of size 8 to read the content of the in.txt file. The while loop reads the content of the in.txt file and writes it to the out.txt file until the end of the file is reached. Therefore, the content of the out.txt file will be ''0123456789''.
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