[Jan 23, 2024] 1Z0-819 certification guide Q&A from Training Expert TestInsides
1Z0-819 Certification Overview Latest 1Z0-819 PDF Dumps
NEW QUESTION # 87
Given:
What is the result?
- A. AnotherClass#methodA()SomeClass#methodA()
- B. SomeClass#methodA()AnotherClass#methodA()
- C. The compilation fails.
- D. A ClassCastException is thrown at runtime.
- E. SomeClass#methodA()SomeClass#methodA()
- F. AnotherClass#methodA()AnotherClass#methodA()
Answer: C
Explanation:
NEW QUESTION # 88
Given the code fragment:
Which can replace line 11?
- A. UnaryOperator<Interger >uo = x -> { return x * 3; };
- B. UnaryOperator<Interger > uo = (var x ) -> (x * 3);
- C. UnaryOperator<Interger >uo = (int x) -> x * 3;
- D. UnaryOperator<Interger >uo = var x -> { return x 3 ; };
Answer: B
NEW QUESTION # 89
Which statement about a functional interface is true?
- A. It must be defined with the public access modifier.
- B. It is declared with a single default method.
- C. It must be annotated with @FunctionalInterface.
- D. It is declared with a single abstract method.
- E. It cannot have any private methods and static methods.
Answer: D
NEW QUESTION # 90
Given:
What is the result?
- A. abcd
- B. abd
- C. The compilation fails.
- D. adf
- E. abdf
Answer: A
NEW QUESTION # 91
Given:
You want to use the myResource class in a try-with-resources statement. Which change will accomplish this?
- A. Extend AutoCloseable and override the close method.
- B. Extend AutoCloseable and override the autoClose method.
- C. Implement AutoCloseable and override the close method.
- D. Implement AutoCloseable and override the autoClose method.
Answer: C
NEW QUESTION # 92
Given:
What is the output?
- A. null
- B. Duke
- C. A NullPointerException is thrown at run time.
- D. A NoSuchElementException is thrown at run time.
Answer: B
Explanation:
NEW QUESTION # 93
Given an application with a main module that has this module-info.java file:
Which two are true? (Choose two.)
- A. To run without an error, the application must have at least one module in the module path that provides an implementation of country.CountryDetails.
- B. A module providing an implementation of country.CountryDetails must have a requires main; directive in its module-info.java file.
- C. 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.
- D. An implementation of country.countryDetails can be added to the main module.
- E. A module providing an implementation of country.CountryDetails can be compiled and added without recompiling the main module.
Answer: B,C
NEW QUESTION # 94
Given:
What code must you insert on Line 1 to enable the code to print Hello world?
- A. Hello myH = new Hello();
Hello.Greeting myG = myH.new Greeting();
myG.sayHi(); - B. Hello myH = new Hello(); Greeting myG = new Greeting(); myG.sayHi ();
- C. Hello.Greeting myG = new Hello.Greeting() myG.sayHi();
- D. Hello myH = new Hello();
Hello.Greeting myG = myH.new Hello.Greeting();
myG.sayHi();
Answer: A
NEW QUESTION # 95
Given:
You want to implement the java. Io, serializable interface to the MypersisteneData class.
Which method should be overriden?
- A. The readExternal method
- B. The readExternal and writeExternal method
- C. The writeExternal method
- D. nothing
Answer: B
NEW QUESTION # 96
Given:
Which annotation should be used to remove warnings from compilation?
- A. @SuppressWarnings on the main and print methods
- B. @SuppressWarnings("all") on the main and print methods
- C. @SuppressWarnings("unchecked") on main and @SafeVarargs on the print method
- D. @SuppressWarnings("rawtypes") on main and @SafeVarargs on the print method
Answer: C
Explanation:
NEW QUESTION # 97
Given:
What is the result?
- A. nothing
- B. 0
- C. 0 4 9
- D. 1
Answer: A
NEW QUESTION # 98
Given:
What is the result?
- A. Orange Juice
- B. Orange Juice Apple Pie Lemmon Ice Raspberry Tart
- C. The program prints nothing.
- D. The compilation fails.
Answer: B
Explanation:
NEW QUESTION # 99
Given the code fragment:
What is the result?
- A. 13 5 7 9
- B. 2 4 6 8
- C. 2 4 6 B 10
- D. 1 3 5 7 9 11
Answer: D
NEW QUESTION # 100
Given:
What is the result?
- A. AnotherClass#methodA()SomeClass#methodA()
- B. SomeClass#methodA()AnotherClass#methodA()
- C. The compilation fails.
- D. A ClassCastException is thrown at runtime.
- E. SomeClass#methodA()SomeClass#methodA()
- F. AnotherClass#methodA()AnotherClass#methodA()
Answer: C
Explanation:
NEW QUESTION # 101
Given:
What is the type of x?
- A. List<String>
- B. String
- C. char
- D. List<Character>
Answer: B
NEW QUESTION # 102
Given:
and omitting the throws FooException clause results in a compilation error.
Which statement is true about FooException?
- A. FooException is unchecked.
- B. FooException is a subclass of RuntimeError.
- C. The body of foo can only throw FooException.
- D. The body of foo can throw FooException or one of its subclasses.
Answer: D
NEW QUESTION # 103
Given:
executed with this command:
java Main one two three
What is the output of this class?
- A. 1) one2) two3) three
- B. A java.lang.ArrayIndexOutOfBoundsException is thrown.
- C. The compilation fails.
- D. nothing
- E. 1) one
Answer: A
NEW QUESTION # 104
Given:
You want the code to produce this output:
John
Joe
Jane
Which code fragment should be inserted on line 1 and line 2 to produce the output?
- A. Insert Comparator<Person> on line 1.
Insert
public int compare(Person person) {
return person.name.compare(this.name);
}
on line 2. - B. Insert Comparator<Person> on line 1.
Insert
public int compare(Person p1, Person p2) {
return p1.name.compare(p2.name);
}
on line 2. - C. Insert Comparable<Person> on line 1.
Insert
public int compare(Person p1, Person p2) {
return p1.name.compare(p2.name);
}
on line 2. - D. Insert Comparator<Person> on line 1.
Insert
public int compareTo(Person person) {
return person.name.compareTo(this.name);
}
on line 2.
Answer: D
NEW QUESTION # 105
Which describes a characteristic of setting up the Java development environment?
- A. Setting up the Java development environment occurs when you install an IDE before the JDK.
- B. You set up the Java development environment for a specific operating system when you install the JDK.
- C. The Java development environment is set up for all operating systems by default.
- D. Setting up the Java development environment requires that you also install the JRE.
Answer: A
NEW QUESTION # 106
......
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