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Oracle 1Z0-829 is a certification exam designed for developers who want to demonstrate their knowledge and skills in Java SE 17. 1Z0-829 exam is suitable for developers who have already achieved a basic level of proficiency in Java and want to take their skills to the next level. Oracle 1Z0-829 is a demanding exam that requires a firm grasp of advanced Java concepts and techniques.

Oracle Java SE 17 Developer Sample Questions (Q14-Q19):

NEW QUESTION # 14
Given the code fragment:

Which code fragment invokes all callable objects in the workers set?

Answer: C

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). Reference: AbstractExecutorService (Java SE 17 & JDK 17) - Oracle

NEW QUESTION # 15
Given:

What is the result

A. Marketing
Undefined
B. Marketing
Finance
Technical
C. UnDefined
D. Marketing

Answer: C

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 # 16
Given:

Which action enables the code to compile?

A. Replace 2 with static string name;
B. Replace 7 with public void display (string design) {
C. Replace 15 with item.display (''Flower'');
D. Replace 3 with private static void display () {

Answer: B

Explanation:
Explanation
The answer is C because the code fragment contains a syntax error in line 7, where the method display is declared without any parameter type. This causes a compilation error, as Java requires the parameter type to be specified for each method parameter. To fix this error, the parameter type should be added before the parameter name, such as string design. This will enable the code to compile and run without any errors.
References:
Oracle Certified Professional: Java SE 17 Developer
Java SE 17 Developer
OCP Oracle Certified Professional Java SE 17 Developer Study Guide
Java Methods

NEW QUESTION # 17
Given:

and the code fragment:

A. 300.00
CellPhone.ToyCar
B. 300.00
CellPhone,ToyCar,Motor,Fan
C. 100.00 CellPhone,ToyCar
D. 100.00
CellPhone,ToyCar,Motor,Fan

Answer: B

Explanation:
The code fragment is using the Stream API to perform a reduction operation on a list of ElectricProduct objects. The reduction operation consists of three parts: an identity value, an accumulator function, and a combiner function. The identity value is the initial value of the result, which is 0.0 in this case. The accumulator function is a BiFunction that takes two arguments: the current result and the current element of the stream, and returns a new result. In this case, the accumulator function is (a,b) -> a + b.getPrice (), which means that it adds the price of each element to the current result. The combiner function is a BinaryOperator that takes two partial results and combines them into one. In this case, the combiner function is (a,b) -> a + b, which means that it adds the two partial results together.
The code fragment then applies a filter operation on the stream, which returns a new stream that contains only the elements that match the given predicate. The predicate is p -> p.getPrice () > 10, which means that it selects only the elements that have a price greater than 10. The code fragment then applies a map operation on the filtered stream, which returns a new stream that contains the results of applying the given function to each element. The function is p -> p.getName (), which means that it returns the name of each element.
The code fragment then calls the collect method on the mapped stream, which performs a mutable reduction operation on the elements of the stream using a Collector. The Collector is Collectors.joining (","), which means that it concatenates the elements of the stream into a single String, separated by commas.
The code fragment then prints out the result of the reduction operation and the result of the collect operation, separated by a new line. The result of the reduction operation is 300.00, which is the sum of the prices of all ElectricProduct objects that have a price greater than 10. The result of the collect operation is CellPhone,ToyCar,Motor,Fan, which is the concatenation of the names of all ElectricProduct objects that have a price greater than 10.
Therefore, the output of the code fragment is:
300.00 CellPhone,ToyCar,Motor,Fan

NEW QUESTION # 18
Which statement is true?

A. thread in waiting state consumes CPU cycles.
B. A thread in waiting state must handle InterrupedException.
C. IllegalStateException is thrown if a thread in waiting state is moved back to runnable.
D. After the timed wait expires, the waited thread moves to the terminated state.

Answer: B

Explanation:
A thread in waiting state is waiting for another thread to perform a particular action, such as calling notify() or notifyAll() on a shared object, or terminating a joined thread. A thread in waiting state can be interrupted by another thread, which will cause the waiting thread to throw an InterruptedException and return to the runnable state. Therefore, a thread in waiting state must handle InterruptedException, either by catching it or declaring it in the throws clause. Reference: Thread.State (Java SE 17 & JDK 17), [Thread (Java SE 17 & JDK 17)]

NEW QUESTION # 19
......

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1Z0-829 RELIABLE EXAM BRAINDUMPS, 1Z0-829 NEW CRAM MATERIALS

1Z0-829 Reliable Exam Braindumps, 1Z0-829 New Cram Materials