RELIABLE 1Z0-829 DUMPS PDF, LATEST 1Z0-829 TEST LABS

Reliable 1Z0-829 Dumps Pdf, Latest 1Z0-829 Test Labs

Reliable 1Z0-829 Dumps Pdf, Latest 1Z0-829 Test Labs

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Oracle 1Z0-829 (Java SE 17 Developer) Certification Exam is designed to test the candidate's knowledge and skills in developing applications using Java SE 17. It is a globally recognized certification that demonstrates the candidate's expertise in Java programming language, including advanced features such as lambda expressions, modules, and streams. Java SE 17 Developer certification exam is intended for developers who have a strong understanding of Java programming and are looking to validate their skills and knowledge.

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Oracle Java SE 17 Developer Sample Questions (Q44-Q49):

NEW QUESTION # 44
Given:

Which statement is true?

  • A. The program fails to compile.
  • B. The program throws outofStockException.
  • C. The program throws StockException.
  • D. The program throws ClassCastException

Answer: A

Explanation:
The answer is B because the code fragment contains a syntax error that prevents it from compiling. The code fragment tries to catch a StockException in line 10, but the catch block does not have a parameter of type StockException. The catch block should have a parameter of type StockException, such as:
catch (StockException e) { // handle the exception }
This is required by the Java syntax for the catch clause, which must have a parameter that is a subclass of Throwable. Without a parameter, the catch block is invalid and causes a compilation error.
Option A is incorrect because the program does not throw a StockException, as it does not compile.
Option C is incorrect because the program does not throw an OutofStockException, as it does not compile.
Option D is incorrect because the program does not throw a ClassCastException, as it does not compile. Reference:
Oracle Certified Professional: Java SE 17 Developer
Java SE 17 Developer
OCP Oracle Certified Professional Java SE 17 Developer Study Guide
The try-with-resources Statement (The Java™ Tutorials > Essential Classes > Exceptions) The catch Blocks (The Java™ Tutorials > Essential Classes > Exceptions)


NEW QUESTION # 45
Given the code fragment:

What is the result?

  • A. False true true optional (Newyear)
  • B. 010 optional (Newyear)
  • C. True true false NewYear
  • D. 0110

Answer: A

Explanation:
The code fragment is using the stream methods allMatch, anyMatch, noneMatch, and findFirst on a list of strings called specialDays. These methods are used to perform matching operations on the elements of a stream, such as checking if all, any, or none of the elements satisfy a given predicate, or finding the first element that matches a predicate1. The predicate in this case is that the string equals "Labour" or "Halloween". The output will be:
False: because not all of the elements in specialDays are equal to "Labour" or "Halloween".
true: because at least one of the elements in specialDays is equal to "Labour" or "Halloween".
true: because none of the elements in specialDays are equal to both "Labour" and "Halloween".
Optional[NewYear]: because the first element in specialDays that matches the predicate is "NewYear", and the findFirst method returns an Optional object that may or may not contain a non-null value2.


NEW QUESTION # 46
Which statement is true about modules?

  • A. Only unnamed modules are on the module path.
  • B. Automatic and unnamed modules are on the module path.
  • C. Only automatic modules are on the module path.
  • D. Only named modules are on the module path.
  • E. Automatic and named modules are on the module path.

Answer: E

Explanation:
A module path is a sequence of directories that contain modules or JAR files. A named module is a module that has a name and a module descriptor (module-info.class) that declares its dependencies and exports. An automatic module is a module that does not have a module descriptor, but is derived from the name and contents of a JAR file. Both named and automatic modules can be placed on the module path, and they can be resolved by the Java runtime. An unnamed module is a special module that contains all the classes that are not in any other module, such as those on the class path. An unnamed module is not on the module path, but it can read all other modules.


NEW QUESTION # 47
Given the code fragment:

Which action sorts the book list?

  • A. At Line n2, replace books,sort() with books.stream().sort(0.
  • B. At Line n2, replace compareTo () with compare ().
  • C. At line n1, convert books type to mutable ArrayList type.
  • D. At Line n1, convert type to mutable array type.

Answer: B

Explanation:
Explanation
The code fragment is trying to sort a list of books using the Collections.sort() method. The correct answer is D, because the compareTo() method is not the correct way to compare two objects in a Comparator. The compare() method is the correct way to compare two objects in a Comparator and return an int value that indicates their order1. The compareTo() method is used to implement the Comparable interface, which defines the natural order of objects of a class2. The other options are incorrect because they either do not change the type of the list, which is already mutable, or they do not use the correct syntax for sorting a stream, which requires a terminal operation such as collect()3. References: Comparator (Java SE 17 & JDK 17), Comparable (Java SE 17 & JDK 17), Stream (Java SE 17 & JDK 17)


NEW QUESTION # 48
Given the code fragment:

Which two statements at Line nl independently enable you to print 1250?

  • A. Integer res = 250 + integer . valueof (s);
  • B. Integer res = 250 + s:
  • C. Integer res = 250 + integer.parseint (s)
  • D. Integer res= 250 + s2;
  • E. Integer res = 250; Res = + s2;
  • F. Integer res = 250 + integer (s2):

Answer: A,C

Explanation:
Explanation
The code fragment is creating a string variable "s" with the value "10_00" and an integer variable "s2" with the value 10. The string "s" is using an underscore as a separator for readability, which is allowed in Java SE
171. The question is asking for two statements that can add 250 to the numeric value of "s" and assign it to an integer variable "res". The correct answers are A and E because they use the methods parseInt and valueOf of the Integer class to convert the string "s" to an integer. Both methods interpret the string as a signed decimal integer and return the equivalent int or Integer value23. The other options are incorrect because they either use invalid syntax, such as B and C, or they do not convert the string "s" to an integer, such as D and F: References: Binary Literals (The Java™ Tutorials > Learning the Java Language > Numbers and Strings), Integer (Java SE 17 & JDK 17), Integer (Java SE 17 & JDK 17)


NEW QUESTION # 49
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