Latest 1Z0-829 Exam Dumps Oracle Exam from Training Expert SurePassExams
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Oracle 1Z0-829 certification exam is a multiple-choice exam that consists of 70 questions, and the candidate has to complete the exam within 150 minutes. 1Z0-829 exam questions are designed to test the candidate's knowledge and skills in Java SE 17 and related technologies. 1Z0-829 exam is available in English and Japanese languages and can be taken online or at a testing center.
Oracle 1Z0-829 exam is designed to assess the expertise of Java software developers in creating applications using the latest version of Java SE 17 technology. Java SE 17 Developer certification exam is intended for candidates who want to demonstrate their proficiency in developing Java applications using the latest features of Java SE 17. 1Z0-829 exam also tests the candidate's understanding of Java programming concepts, such as object-oriented programming, interfaces, and generics.
NEW QUESTION # 25
Given the code fragments:
Which action prints Wagon : 200?
- A. At line n1, implement the java.io, Serializable interface.
- B. At line n3, replace readObject (0 with readLine().
- C. At Line n1, implement the java.io.AutoCloseable interface
- D. At line n2, in the main method signature, add throws IOException, ClassCastException.
- E. At line n2, in the main method signature, add throws IoException, ClassNotFoundException.
- F. At Line n3, replace Car with LuxurayCar.
Answer: E
Explanation:
Explanation
The code fragment is trying to read an object from a file using the ObjectInputStream class. This class throws an IOException and a ClassNotFoundException. To handle these exceptions, the main method signature should declare that it throws these exceptions. Otherwise, the code will not compile. If the main method throws these exceptions, the code will print Wagon : 200, which is the result of calling the toString method of the LuxuryCar object that was written to the file. References: ObjectInputStream (Java SE 17 & JDK 17) - Oracle, ObjectOutputStream (Java SE 17 & JDK 17) - Oracle
NEW QUESTION # 26
Given the code fragment:
Which code fragment invokes all callable objects in the workers set?
- A.
- B.
- C.
- D.
Answer: B
Explanation:
Explanation
The code fragment in Option C invokes all callable objects in the workers set by using the ExecutorService's invokeAll() method. This method takes a collection of Callable objects and returns a list of Future objects representing the results of the tasks. The other options are incorrect because they either use the wrong method (invokeAny() or submit()) or have syntax errors (missing parentheses or semicolons). References: AbstractExecutorService (Java SE 17 & JDK 17) - Oracle
NEW QUESTION # 27
Given:
What is the result?
- A. 1001
100
1000 - B. 100
100
1000 - C. 1001
1001
1000 - D. 101
101
1000
Answer: A
Explanation:
The code fragment is using the bitwise operators & (AND), | (OR), and ^ (XOR) to perform operations on the binary representations of the integer values. The & operator returns a 1 in each bit position where both operands have a 1, the | operator returns a 1 in each bit position where either operand has a 1, and the ^ operator returns a 1 in each bit position where only one operand has a 1. The binary representations of the integer values are as follows:
1000 = 1111101000
100 = 1100100
101 = 1100101
The code fragment performs the following operations:
x = x ^ y; // x becomes 1111010101, which is 1001 in decimal
y = x ^ y; // y becomes 1100100, which is 100 in decimal
x = x ^ y; // x becomes 1100101, which is 101 in decimal
The code fragment then prints out the values of x, y, and z, which are 1001, 100, and 1000 respectively. Therefore, option D is correct.
NEW QUESTION # 28
Given:
What is the result
- A. Marketing
Undefined - B. Marketing
- C. Marketing
Finance
Technical - D. UnDefined
Answer: D
Explanation:
Explanation
The code fragment is using the switch statement with the new Java 17 syntax. The switch statement checks the value of the variable desig and executes the corresponding case statement. In this case, the value of desig is
"CTO", which does not match any of the case labels. Therefore, the default case statement is executed, which prints "Undefined". The other case statements are not executed, because there is no fall through in the new syntax. Therefore, the output of the code fragment is:
Undefined
NEW QUESTION # 29
Assume you have an automatic module from the module path display-ascii-0.2. jar. Which name is given to the automatic module based on the given JAR file?
- A. Display-ascii-0.2
- B. Display-ascii-0
- C. Display.ascii
- D. Display-ascii
Answer: D
Explanation:
An automatic module name is derived from the name of the JAR file when it does not contain a module-info.class file. If the JAR file has an "Automatic-Module-Name" attribute in its main manifest, then its value is the module name. Otherwise, the module name is derived from the JAR file's name by removing any version numbers and converting it to lower case. Therefore, for a JAR named display-ascii-0.2.jar, the automatic module name would be display-ascii, following these rules.
NEW QUESTION # 30
Given:
What is the result
- A. Marketing
Undefined - B. Marketing
- C. Marketing
Finance
Technical - D. UnDefined
Answer: D
Explanation:
The code fragment is using the switch statement with the new Java 17 syntax. The switch statement checks the value of the variable desig and executes the corresponding case statement. In this case, the value of desig is "CTO", which does not match any of the case labels. Therefore, the default case statement is executed, which prints "Undefined". The other case statements are not executed, because there is no fall through in the new syntax. Therefore, the output of the code fragment is:
Undefined
NEW QUESTION # 31
Given:
Which two modifications enable the code to print Open Close?
- A.
- B.
- C.
- D.
- E.
Answer: A,B
Explanation:
The code given is a try-with-resources statement that declares a resource of type AutoCloseable. The resource is an anonymous class that implements the AutoCloseable interface and overrides the close() method. The code also has a print() method that prints the value of the variable s. The code is supposed to print "Open Close", but it does not compile because of two errors.
The first error is at line n1, where the anonymous class is missing a semicolon at the end of its declaration. This causes a syntax error and prevents the code from compiling. To fix this error, option B adds a semicolon after the closing curly brace of the anonymous class.
The second error is at line n2, where the print() method is called without an object reference. This causes a compilation error because the print() method is not static and cannot be invoked without an object. To fix this error, option E adds an object reference to the print() method by using the variable t.
Therefore, options B and E are correct and enable the code to print "Open Close".
NEW QUESTION # 32
Given the code fragment:
What is the result?
- A. Range 1
Range 2
Range 3
Range 1
Not a valida rank - B. Range1
Note a valid rank. - C. Range 1
- D. Range 1
Range 2
Range 3
Answer: A
Explanation:
The code fragment is using the switch statement with the new Java 17 syntax. The switch statement checks the value of the variable rank and executes the corresponding case statement. In this case, the value of rank is 4, so the first case statement is executed, printing "Range1". The second and third case statements are also executed, printing "Range2" and "Range3". The default case statement is also executed, printing "Not a valid rank". Reference: Java Language Changes - Oracle Help Center
NEW QUESTION # 33
Given:
- A. A NumberFormatException is thrown
- B. Compilation fails
- C. Hello
- D. there
Answer: B
Explanation:
Explanation
The code fragment will fail to compile because the parseInt method of the Integer class is a static method, which means that it can be invoked without creating an object of the class. However, the code is trying to invoke the parseInt method on an object of type Integer, which is not allowed. The correct way to invoke the parseInt method is by using the class name, such as Integer.parseInt (s). Therefore, the code fragment will produce a compilation error. References: Integer (Java SE 17 & JDK 17) - Oracle
NEW QUESTION # 34
Given the content of the in. tart file:
23456789
and the code fragment:
What is the content of the out .txt file?
- A. 0123456789
- B. 01234567801234
- C. 01234567
- D. 0123456789234567
- E. 012345678
- F. 012345678901234
Answer: A
Explanation:
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".
NEW QUESTION # 35
Given the code fragment:
What is the result?
- A. Range 1
Range 2
Range 3
Range 1
Not a valida rank - B. Range1
Note a valid rank. - C. Range 1
- D. Range 1
Range 2
Range 3
Answer: A
Explanation:
Explanation
The code fragment is using the switch statement with the new Java 17 syntax. The switch statement checks the value of the variable rank and executes the corresponding case statement. In this case, the value of rank is 4, so the first case statement is executed, printing "Range1". The second and third case statements are also executed, printing "Range2" and "Range3". The default case statement is also executed, printing "Not a valid rank". References: Java Language Changes - Oracle Help Center
NEW QUESTION # 36
Given the code fragment:
What is the result?
- A. A compilation error occurs at Line n1.
- B. Logged out at: 2021-01-12T21:58:00z
- C. Can't logout
- D. Logged out at: 2021-0112T21:58:19.880z
Answer: B
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. Reference:
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.temporal.TemporalUnit)
NEW QUESTION # 37
Given:
What is the result?
- A. UserName
- B. User name (US)
- C. User name (EN - US)
- D. User name (EN)
- E. The program throws a MissingResourceException.
Answer: E
Explanation:
Explanation
The answer is B because the code fragment contains a logical error that causes a MissingResourceException at runtime. The code fragment tries to load a resource bundle with the base name "Captions.properties" and the locale "en_US". However, there is no such resource bundle available in the classpath. The available resource bundles are:
Captions.properties
Captions_en.properties
Captions_US.properties
Captions_en_US.properties
The ResourceBundle class follows a fallback mechanism to find the best matching resource bundle for a given locale. It first tries to find the resource bundle with the exact locale, then it tries to find the resource bundle with the same language and script, then it tries to find the resource bundle with the same language, and finally it tries to find the default resource bundle with no locale. If none of these resource bundles are found, it throws a MissingResourceException.
In this case, the code fragment is looking for a resource bundle with the base name "Captions.properties" and the locale "en_US". The ResourceBundle class will try to find the following resource bundles in order:
Captions.properties_en_US
Captions.properties_en
Captions.properties
However, none of these resource bundles exist in the classpath. Therefore, the ResourceBundle class will throw a MissingResourceException.
To fix this error, the code fragment should use the correct base name of the resource bundle family, which is
"Captions" without the ".properties" extension. For example:
ResourceBundle captions = ResourceBundle.getBundle("Captions", currentLocale); This will load the appropriate resource bundle for the current locale, which is "Captions_en_US.properties" in this case. References:
Oracle Certified Professional: Java SE 17 Developer
Java SE 17 Developer
OCP Oracle Certified Professional Java SE 17 Developer Study Guide
ResourceBundle (Java Platform SE 8 )
About the ResourceBundle Class (The Java™ Tutorials > Internationalization)
NEW QUESTION # 38
Which two code fragments compile?
- A.
- B.
- C.
- D.
- E.
Answer: B,D
Explanation:
Explanation
The two code fragments that compile are B and E. These are the only ones that use the correct syntax for declaring and initializing a var variable. The var keyword is a reserved type name that allows the compiler to infer the type of the variable based on the initializer expression. However, the var variable must have an initializer, and the initializer must not be null or a lambda expression. Therefore, option A is invalid because it does not have an initializer, option C is invalid because it has a null initializer, and option D is invalid because it has a lambda expression as an initializer. Option B is valid because it has a String initializer, and option E is valid because it has an int initializer.
https://docs.oracle.com/en/java/javase/17/language/local-variable-type-inference.html
NEW QUESTION # 39
Given the directory structure:
Given the definition of the Doc class:
Which two are valid definition of the wordDoc class?
- A. Package p1, p2;
Public sealed class WordDoc extends Doc () - B. Package p1;
Public class wordDoc extends Doc () - C. Package p1;
Public final class WordDoc extends Doc () - D. Package p1, p2;
Public non-sealed class WordDoc extends Doc () - E. Package p1;
Public non-sealed class wordDoc extends Doc () - F. Package p1,
non-sealed abstract class WordDoc extends Doc ()
Answer: C,E
Explanation:
The correct answer is A and F because the wordDoc class must be a non-sealed class or a final class to extend the sealed Doc class. Option B is incorrect because the wordDoc class must be non-sealed or final. Option C is incorrect because the wordDoc class cannot be in a different package than the Doc class. Option D is incorrect because the wordDoc class cannot be a sealed class. Option E is incorrect because the wordDoc class cannot be an abstract class. Reference: Oracle Certified Professional: Java SE 17 Developer, 3 Sealed Classes - Oracle Help Center
NEW QUESTION # 40
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Oracle 1Z0-829 (Java SE 17 Developer) Certification Exam is a professional certification exam designed to test the skills and knowledge of Java developers. 1Z0-829 exam is intended for developers who have a good understanding of Java programming language and are looking to improve their skills and advance their careers. Java SE 17 Developer certification exam covers a wide range of topics related to Java SE 17, including Java 17 Language Features, Java 17 Platform Features, Java 17 Security, and Java 17 Concurrency.
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