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Oracle 1Z0-829 Certification Exam is designed for Java developers who want to validate their skills in developing applications using Java SE 17 technologies. 1Z0-829 exam is a great way for developers to demonstrate their proficiency in Java programming and to enhance their career opportunities in the field of software development. Java SE 17 Developer certification exam evaluates the developer's knowledge and skills in various areas of Java SE 17 development, such as memory management, concurrency, and security.

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Oracle 1Z0-829 exam is designed for Java developers who want to validate their skills and expertise in Java SE 17. Java SE 17 Developer certification exam is ideal for developers who have experience in Java programming and want to enhance their knowledge of advanced Java topics such as modules, concurrency, IO, and collections. 1Z0-829 exam is also suitable for developers who want to demonstrate their proficiency in the latest version of Java SE.

Oracle 1Z0-829 (Java SE 17 Developer) Exam is designed for developers who work with Java technology. 1Z0-829 exam measures the knowledge and skills of the candidates in developing Java applications using the latest features and enhancements in Java SE 17. Java SE 17 Developer certification exam is intended for developers who have already gained a certain level of experience and expertise in Java programming.

Oracle Java SE 17 Developer Sample Questions (Q21-Q26):

NEW QUESTION # 21
Given:

What is the result?

A. MA
B. Mb
MC
C. Mb
D. mA
E. Mb

Answer: D

Explanation:
Explanation
The code snippet is an example of Java SE 17 code. The code is checking if the object is an instance of class C and if it is, it will print "mC". If it is not an instance of class C, it will print "mA". In this case, the object is not an instance of class C, so the output will be "mA". References: Pattern Matching for instanceof - Oracle Help Center

NEW QUESTION # 22
Given the code fragment:

A. True:false:true:false
B. True:false:true:true
C. True:false:false:false
D. True:true:false:false

Answer: C

Explanation:
The code fragment compares four pairs of strings using the equals() and intern() methods. The equals() method compares the content of two strings, while the intern() method returns a canonical representation of a string, which means that it returns a reference to an existing string with the same content in the string pool. The string pool is a memory area where strings are stored and reused to save space and improve performance. The results of the comparisons are as follows:
s1.equals(s2): This returns true because both s1 and s2 have the same content, "Hello Java 17".
s1 == s2: This returns false because s1 and s2 are different objects with different references, even though they have the same content. The == operator compares the references of two objects, not their content.
s1.intern() == s2.intern(): This returns true because both s1.intern() and s2.intern() return a reference to the same string object in the string pool, which has the content "Hello Java 17". The intern() method ensures that there is only one copy of each distinct string value in the string pool.
"Hello Java 17" == s2: This returns false because "Hello Java 17" is a string literal, which is automatically interned and stored in the string pool, while s2 is a string object created with the new operator, which is not interned by default and stored in the heap. Therefore, they have different references and are not equal using the == operator.

NEW QUESTION # 23
Given:

What is the result?

A. MA
B. Mb
MC
C. Mb
D. mA
E. Mb

Answer: D

Explanation:
The code snippet is an example of Java SE 17 code. The code is checking if the object is an instance of class C and if it is, it will print "mC". If it is not an instance of class C, it will print "mA". In this case, the object is not an instance of class C, so the output will be "mA". Reference: Pattern Matching for instanceof - Oracle Help Center

NEW QUESTION # 24
Given the code fragment:

Which code line n1, obtains the java.io.Console object?

Answer: D

Explanation:
The code fragment is trying to obtain the java.io.Console object, which is a class that provides methods to access the character-based console device, if any, associated with the current Java virtual machine. The correct way to obtain the Console object is to call the static method Console console() in the java.lang.System class. This method returns the unique Console object associated with the current Java virtual machine, if any. Therefore, option A is correct, as it calls System.console() and assigns it to a Console variable. Reference:
https://docs.oracle.com/javase/17/docs/api/java.base/java/io/Console.html
https://docs.oracle.com/javase/17/docs/api/java.base/java/lang/System.html#console()
https://education.oracle.com/products/trackp_OCPJSE17
https://mylearn.oracle.com/ou/learning-path/java-se-17-developer/99487

NEW QUESTION # 25
Given the code fragment:

What is the result?

A. Logged out at: 2021-0112T21:58:19.880z
B. Can't logout
C. A compilation error occurs at Line n1.
D. Logged out at: 2021-01-12T21:58:00z

Answer: D

Explanation:
Explanation
The code fragment is using the Java SE 17 API to get the current time and then truncating it to minutes. The result will be the current time truncated to minutes, which is why option B is correct. References:
https://education.oracle.com/products/trackp_OCPJSE17
https://mylearn.oracle.com/ou/learning-path/java-se-17-developer/99487
https://docs.oracle.com/javase/17/docs/api/java.base/java/time/Instant.html#truncatedTo(java.time.tempora

NEW QUESTION # 26
......

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