Oracle 1z1-819 Deluxe Study Guide with Online Test Engine
1z1-819 dumps review - Professional Quiz Study Materials
How much Java SE 11 Developer Exam Number: 1Z0-819 costs
- Types of questions: Performance Based Questions
- No. of Questions: 60 Questions
- Examination Name: Java SE 11 Developer Exam Number: 1Z0-819
- Passing Score: 60% or higher
- Examination Fees: $250 USD
Who should take the Java SE 11 Developer Exam Number: 1Z0-819
This exam helps students to understand the basic relational database concepts. Moreover, it will teach the students about data modeling concepts, building Entity Relationship Diagrams (ERDs), and mapping ERDs. Moreover, with this project-based learning techniques, students will be able to create and work with projects to design, implement, and demonstrate a database solution for a business or organization.
NEW QUESTION 20
Given:
What is the result?
- A. 0
- B. 1
- C. 2
- D. 3
- E. 4
Answer: C
NEW QUESTION 21
Given:
Which statement on line 1 enables this code to compile?
- A. Function<Integer, Integer> f = n > n * 2;
- B. Function<Integer> f = n > n * 2;
- C. Function<int> f = n > n * 2;
- D. Function f = n > n * 2;
- E. Function<int, int> f = n > n * 2;
Answer: A
Explanation:
NEW QUESTION 22
Given:
What is the result?
- A. The program prints nothing.
- B. An exception is thrown at runtime
- C. Take extra care
- D. Take extra care
Take extra care
Answer: B
NEW QUESTION 23
Given:
This code results in a compilation error.
Which code should be inserted on line 1 for a successful compilation?
- A. Consumer consumer = (String args) > System.out.print(args);
- B. Consumer consumer = msg -> { return System.out.print(msg); };
- C. Consumer consumer = System.out::print;
- D. Consumer consumer = var arg > {System.out.print(arg);};
Answer: C
Explanation:
NEW QUESTION 24
Given:
Which two lines cause compilation errors? (Choose two.)
- A. line 8
- B. line 9
- C. line 6
- D. line 7
- E. line 12
Answer: C,D
NEW QUESTION 25
Given:
Which two lines cause compilation errors? (Choose two.)
- A. line 8
- B. line 9
- C. line 6
- D. line 7
- E. line 12
Answer: C,D
NEW QUESTION 26
Given:
Which two statements are true if the method is added to Bar? (Choose two.)
- A. public <T> Collection<T> foo(Collection<T> arg) { ... } overloads Foo.foo.
- B. public Collection<String> foo(Collection<String> arg) { ... } overrides Foo.foo.
- C. public <T> Collection<T> bar(Collection<T> arg) { ... } overloads Foo.foo.
- D. public <T> Iterable<T> foo(Collection<T> arg) { ... } overrides Foo.foo.
- E. public <T> Collection<T> foo(Stream<T> arg) { ... } overloads Foo.foo.
- F. public <T> List<T> foo(Collection<T> arg) { ... } overrides Foo.foo.
Answer: D,F
NEW QUESTION 27
Which code is correct?
- A. Runnable r = > System.out.println("Message");
- B. Runnable r = {System.out.println("Message")};
- C. Runnable r = () -> {System.out.println("Message");};
- D. Runnable r = () > System.out::print;
- E. Runnable r = "Message" > System.out.println();
Answer: C
NEW QUESTION 28
Given:
What is the result?
- A. An exception is thrown at runtime.
- B. 6=(x+y)=6
- C. 42=(x+y)=6
- D. 6=(x+y)=42
- E. 42=(x+y)=42
Answer: D
Explanation:
NEW QUESTION 29
Given:
You wants to make the reduction operation parallelized.
Which two modifications will accomplish this?
- A. Replace line 1 with int sum = numbers. Parallel ( ). Stream ( ). Reduce (0, (n, m ) -> n + m);
- B. Replace line 1with int sum = number. Stream ( ) . flatMap (a -> a) .reduce (0, (n, m) -> n +m );
- C. Replace line 1with int sum = number.stream. parallel ( ). Reduce (0, (n, m) -> n + m);
- D. Replace line 1 with int sum = numbers. Stream (). Interate (0, a -> a+1. Reduce (0, (n m) -> n+m);
- E. Replace line 1with int sum = numbers. ParallelStream ( ). Reduce (0, (n, m ) -> n + m);
Answer: B,D
NEW QUESTION 30
Given:
Which three actions implement Java SE security guidelines? (Choose three.)
- A. Change the getNames() method name to get$Names().
- B. Change line 6 to public synchronized String[] getNames() {.
- C. Change line 2 to private final String[] names;.
- D. Change line 7 to return names.clone();.
- E. Change line 3 to private Secret(String[] names) {.
- F. Change line 2 to protected volatile String[] names;.
- G. Change line 4 to this.names = names.clone();.
Answer: C,E,F
NEW QUESTION 31
What makes Java dynamic?
- A. The Java compiler preprocesses classes to run on specific target platforms.
- B. The runtime can process machine language sources as well as executables from different language compilers.
- C. The Java compiler uses reflection to test if class methods are supported by resources of a target platform.
- D. At runtime, classes are loaded as needed, and new code modules can be loaded on demand.
Answer: D
NEW QUESTION 32
Given the code fragment:
Path currentFile = Paths.get("/scratch/exam/temp.txt");
Path outputFile = Paths get("/scratch/exam/new.txt");
Path directory = Paths.get("/scratch/");
Files.copy(currentFile, outputFile);
Files.copy(outputFile, directory);
Files.delete (outputFile);
The /scratch/exam/temp.txt file exists. The /scratch/exam/new.txt and /scratch/new.txt files do not exist.
What is the result?
- A. /scratch/exam/new.txt and /scratch/new.txt are deleted.
- B. A copy of /scratch/exam/new.txt exists in the /scratch directory and /scratch/exam/new.txt is deleted.
- C. The program throws a NoSuchFileException.
- D. The program throws a FileaAlreadyExistsException.
Answer: C
Explanation:
NEW QUESTION 33
Given:
What is the result?
- A. Joe Bloggs
- B. null
- C. p1
- D. The compilation fails due to an error in line 1.
Answer: D
Explanation:
NEW QUESTION 34
Given the code fragment:
Which can replace line 11?
- A. UnaryOperator<Interger >uo = x -> { return x * 3; };
- B. UnaryOperator<Interger >uo = (int x) -> x * 3;
- C. UnaryOperator<Interger >uo = var x -> { return x 3 ; };
- D. UnaryOperator<Interger > uo = (var x ) -> (x * 3);
Answer: D
NEW QUESTION 35
Given TripleThis.java:
Compiling TripleThis.java gives this compiler warning:
Note: TripleThis.java uses unchecked or unsafe operations.
Which two replacements done together remove this compiler warning?
- A. Replace line 9 with function<Integer> tripler = x-> - { return (Integer) X * 3 ; }.
- B. Replace line 12 with public static void printValue function<Integer> f, int num) {.
- C. Replace line 9 with function<Integer>, Integer> = X -> { return (integer) x * 3; }.
- D. Replace line 12 with public static <T> void printValue (Function<T, T> f, T num ) {,
- E. Replace line 12 with public static int printValue function<Integer, Integer>, f, T num {.
Answer: A,E
NEW QUESTION 36
......
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