Nov-2024 New Version 1Z0-819 Certificate & Helpful Exam Dumps is Online
1Z0-819 Free Certification Exam Material with 297 Q&As
NEW QUESTION # 117
Given:
What is the result?
- A. 0
- B. 1
- C. nothing
- D. 0 4 9
Answer: C
NEW QUESTION # 118
Which two are functional interfaces? (Choose two.)
- A. Option E
- B. Option C
- C. Option D
- D. Option A
- E. Option B
Answer: A,B
NEW QUESTION # 119
What is the result?
- A. 0
- B. An ArrayIndexOutOfBoundsException is thrown at runtime.
- C. 1
- D. 2
- E. 3
Answer: E
NEW QUESTION # 120
Given:
Which expression when added at line 1 will produce the output of 1.17?
- A. float z = Math.round((float)x/y*100)/(float)100;
- B. float z = Math.round((int)(x/y),2);
- C. float z = (float)(Math.round((float)x/y*100)/100);
- D. float z = Math.round((float)x/y,2);
Answer: A
Explanation:
NEW QUESTION # 121
Given:
What action ensures successful compilation?
- A. Replace enum Color with public enum Color.
- B. Replace public Color(int c) with private Color(int c).
- C. Replace enum Color implements Serializable with public enum Color.
- D. Replace int c; with private final int c;.
- E. Replace int c; with private int c;.
Answer: B
Explanation:
NEW QUESTION # 122
Given:
And the command:
java Main Helloworld
What is the result ?
- A. Input: Then block until any input comes from System.in.
- B. A NullPointerException is thrown at run time.
- C. Input: Echo:
- D. Input: Helloworld Echo: Helloworld
- E. Input: Echo: Helloworld
Answer: A
Explanation:
NEW QUESTION # 123
Given:
Which statement on line 1 enables this code to compile?
- A. Function<int> f = n -> n * 2;
- B. Function<Integer> f = n -> n * 2;
- C. Function<Integer, Integer> f = n -> n * 2;
- D. Function f = n -> n * 2;
- E. Function<int, int> f = n -> n * 2;
Answer: C
Explanation:
NEW QUESTION # 124
Given an application with a main module that has this module-info.java file:
Which two are true? (Choose two.)
- A. To compile without an error, the application must have at least one module in the module source path that provides an implementation of country.CountryDetails.
- B. A module providing an implementation of country.CountryDetails can be compiled and added without recompiling the main module.
- C. A module providing an implementation of country.CountryDetails must have a requires main; directive in its module-info.java file.
- D. An implementation of country.countryDetails can be added to the main module.
- E. To run without an error, the application must have at least one module in the module path that provides an implementation of country.CountryDetails.
Answer: A,C
NEW QUESTION # 125
Given:
You want to use the myResource class in a try-with-resources statement. Which change will accomplish this?
- A. Implement AutoCloseable and override the close method.
- B. Extend AutoCloseable and override the autoClose method.
- C. Implement AutoCloseable and override the autoClose method.
- D. Extend AutoCloseable and override the close method.
Answer: A
NEW QUESTION # 126
Given:
Which statement on line 1 enables this code to compile?
- A. Predicate function = a -> a.equals("banana");
- B. Consumer function = (String f) -> (System.out.println(f);};
- C. Supplier function = () -> fruits.get (0);
- D. Function function = x -> x.substring(0,2);
Answer: D
NEW QUESTION # 127
Given:
What is the expected result of javac?
- A. javac fails to compile the class and prints the error message, C:\workspace4\Mycar.java:1:error:
expected import java.lang - B. javac fails to compile the class and prints the error message, Error: Could not find or load main class Mycar.class
- C. javac fails to compile the class and prints the error message, C:\workspace4\Mycar.java:1:error: package java does not exist
- D. javac compiles Mycar.java without errors or warnings.
Answer: D
NEW QUESTION # 128
Given:
What is the result?
- A. 6104 3
- B. 0
- C. 6910 3
- D. 10126 3
Answer: A
Explanation:
NEW QUESTION # 129
Which code fragment represents a valid Comparatorimplementation?
- A.
- B.
- C.
- D.
Answer: A
NEW QUESTION # 130
Given:
Which two statements are true if the method is added to Bar? (Choose two.)
- A. public Collection<String> foo(Collection<String> arg) { ... } overrides Foo.foo.
- B. public <T> Iterable<T> foo(Collection<T> arg) { ... } overrides Foo.foo.
- C. public <T> Collection<T> foo(Stream<T> arg) { ... } overloads Foo.foo.
- D. public <T> Collection<T> foo(Collection<T> arg) { ... } overloads Foo.foo.
- E. public <T> Collection<T> bar(Collection<T> arg) { ... } overloads Foo.foo.
- F. public <T> List<T> foo(Collection<T> arg) { ... } overrides Foo.foo.
Answer: B,F
NEW QUESTION # 131
Given:
Which two are correct? (Choose two.)
- A. Option C
- B. Option A
- C. Option D
- D. Option B
Answer: A,C
NEW QUESTION # 132
Given:
executed using this command:
java Myclass My Car is red
What is the output of this class?
- A. Myclass--Car--red
- B. My--is--java
- C. java--Myclass--My
- D. Car--red--My
- E. My--Car--is
Answer: D
NEW QUESTION # 133
Given:
What is the result?
- A. An exception is thrown at runtime.
- B. 0
- C. 1
- D. 2
Answer: D
Explanation:
NEW QUESTION # 134
Given:
and the code fragment:
Which two Map objects group all employees with a salary greater than 30 by neighborhood? (Choose two.)
- A.
- B.
- C.
- D.
- E.
Answer: C
NEW QUESTION # 135
Given:
executed with this command:
java Main one two three
What is the result?
- A. 0). one
- B. The compilation fails.
- C. 0). one1). two2). three
- D. A java.lang.NullPointerException is thrown.
- E. It creates an infinite loop printing:0). one1). two1). two...
Answer: E
NEW QUESTION # 136
Assuming the Widget class has a getPrice method, this code does not compile:
Which two statements, independently, would allow this code to compile? (Choose two.)
- A. Replace line 5 with widgetStream.filter((Widget a) > a.getPrice() > 20.00).
- B. Replace line 5 with widgetStream.filter(a > ((Widget)a).getPrice() > 20.00).
- C. Replace line 1 with List<Widget> widgetStream = widgets.stream();.
- D. Replace line 4 with Stream<Widget> widgetStream = widgets.stream();.
Answer: B,D
NEW QUESTION # 137
Given:
Path p1 = Paths.get("/scratch/exam/topsecret/answers");
Path p2 = Paths.get("/scratch/exam/answers/temp.txt");
Path p3 = Paths.get("/scratch/answers/topsecret");
Which two statements print ..\..\..\answers\topsecret? (Choose two.)
- A. System.out.print(p1.relativize(p3));
- B. System.out.print(p2.relativize(p3));
- C. System.out.print(p1.relativize(p2));
- D. System.out.print(p3.relativize(p1));
- E. System.out.print(p2.relativize(p1));
- F. System.out.print(p3.relativize(p2));
Answer: A,D
NEW QUESTION # 138
Given:
What is the result?
- A. An exception is thrown at runtime.
- B. 2.0
- C. 1.0
- D. The program pints nothing.
- E. 3.0
Answer: E
NEW QUESTION # 139
Given:
Which is true about line 1?
- A. It always executes the System.out::print statement.
- B. If the value is not present, nothing is done.
- C. If the value is not present, a NoSuchElementException is thrown at run time.
- D. If the value is not present, a NullPointerException is thrown at run time.
Answer: B
Explanation:
NEW QUESTION # 140
Given an application with a main module that has this module-info.java file:
Which two are true? (Choose two.)
- A. To compile without an error, the application must have at least one module in the module source path that provides an implementation of country.CountryDetails.
- B. A module providing an implementation of country.CountryDetails can be compiled and added without recompiling the main module.
- C. A module providing an implementation of country.CountryDetails must have a requires main; directive in its module-info.java file.
- D. An implementation of country.countryDetails can be added to the main module.
- E. To run without an error, the application must have at least one module in the module path that provides an implementation of country.CountryDetails.
Answer: A,C
NEW QUESTION # 141
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