Pass Exam Questions Efficiently With 1z1-819 Questions (2023) [Q19-Q40]

Pass Exam Questions Efficiently With 1z1-819 Questions (2023)

1z1-819 Questions - Truly Beneficial For Your Oracle Exam

Oracle 1Z0-819 exam is a comprehensive test that covers a wide range of topics, including Java syntax and data types, arrays, loops, methods, and encapsulation. In addition, it also covers concepts such as inheritance, polymorphism, and abstraction, as well as advanced topics such as functional programming, concurrency, and I/O streams. This makes the exam a challenging and rewarding experience for those who are looking to enhance their knowledge of Java programming.

NEW QUESTION # 19
Given:

What is the output?

A. Hello world!Bonjour le monde!
B. Bonjour le monde!Hello world!
C. Bonjour le monde!Bonjour le monde!
D. Hello world!Hello world!

Answer: B

Explanation:

NEW QUESTION # 20
Given:

What is the result?

A. 0
B. 1
C. 2
D. 3

Answer: D

NEW QUESTION # 21
Given:
LocalDate d1 = LocalDate.of(1997,2,7);
DateTimeFormatter dtf =
DateTimeFormatter.ofPattern( /*insert code here*/ );
System.out.println(dtf.format (d1));
Which pattern formats the date as Friday 7th of February 1997?

A. "eeee dd'th of' MMM yyyy"
B. "eeee d'th of' MMMM yyyy"
C. "eeee d+"th of"+ MMMM yyyy"
D. "eeee dd+"th of"+ MMM yyyy"

Answer: B

NEW QUESTION # 22
Given:

Which code fragment on line 1 makes the m map contain the employee with the highest salary for each neighborhood?
A)

B)

C)

D)

A. Option C
B. Option B
C. Option A
D. Option D

Answer: D

NEW QUESTION # 23
Given the code fragment:

What is the result?

A. A java.lang, UnsupportedOperationException is thrown.
B. A java.lang.NullPointerException is thrown.
C. False
D. True

Answer: A

NEW QUESTION # 24
Given:

and

What is the result?

A. A ClassCastException is thrown at run time.
B. 1
Null
null
C. A NullPointerException is thrown at run time.
D. The compilation fails.
E. 1
1
1

Answer: D

Explanation:

NEW QUESTION # 25
Given:

What is the result?

A. 6=(x+y)=6
B. 6=(x+y)=42
C. 42=(x+y)=42
D. An exception is thrown at runtime.
E. 42=(x+y)=6

Answer: B

Explanation:

NEW QUESTION # 26
Given the code fragment:

What is the result?

A. 0
B. 1
C. 2
D. 3

Answer: B

Explanation:

NEW QUESTION # 27
Which describes a characteristic of setting up the Java development environment?

A. Setting up the Java development environment requires that you also install the JRE.
B. Setting up the Java development environment occurs when you install an IDE before the JDK.
C. The Java development environment is set up for all operating systems by default.
D. You set up the Java development environment for a specific operating system when you install the JDK.

Answer: B

NEW QUESTION # 28
Given:

You wants to make the reduction operation parallelized.
Which two modifications will accomplish this?

A. Replace line 1with int sum = number. Stream ( ) . flatMap (a -> a) .reduce (0, (n, m) -> n +m );
B. Replace line 1 with int sum = numbers. Parallel ( ). Stream ( ). 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: A,D

NEW QUESTION # 29
Given:

When run and all three files exist, what is the state of each reader on Line 1?

A. The compilation fails.
B. All three readers are still open.
C. Only reader1 has been closed.
D. All three readers have been closed.

Answer: A

NEW QUESTION # 30
Given:

What action ensures successful compilation?

A. Replace enum Color implements Serializable with public enum Color.
B. Replace int c; with private final int c;.
C. Replace enum Color with public enum Color.
D. Replace public Color(int c) with private Color(int c).
E. Replace int c; with private int c;.

Answer: D

Explanation:

NEW QUESTION # 31
Given:

A) An exception is thrown at run time.
B)

C) The compilation fails due to an error on line 2.
D) The compilation fails due to an error on line 1.
E)

F)
The compilation fails due to an error on line 3.

A. Option C
B. Option B
C. Option F
D. Option E
E. Option D
F. Option A

Answer: F

NEW QUESTION # 32
Given:

Which two lines can replace line 1 so that the Y class compiles? (Choose two.)

A. set(map.values());
B. super.set(map.values());
C. set(map)
D. map.forEach((k, v) -> set(v)));
E. super.set(List<String> map)

Answer: A,B

NEW QUESTION # 33
Given the code fragment:

What is the output?

A. [-3, -2, -1]
B. The compilation fails.
C. A runtime exception is thrown.
D. [-1, -2, -3]

Answer: C

NEW QUESTION # 34
What makes Java dynamic?

A. At runtime, classes are loaded as needed, and new code modules can be loaded on demand.
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. The Java compiler preprocesses classes to run on specific target platforms.

Answer: A

NEW QUESTION # 35
And the code fragment:

Which situation will occur on code fragment execution?

A. Race Condition
B. Deadlock
C. Starvation
D. Livelock

Answer: C

NEW QUESTION # 36
Given:

and omitting the throws FooException clause results in a compilation error.
Which statement is true about FooException?

A. The body of foo can throw FooException or one of its subclasses.
B. FooException is unchecked.
C. The body of foo can only throw FooException.
D. FooException is a subclass of RuntimeError.

Answer: A

NEW QUESTION # 37
Given this enum declaration:

Examine this code:
System.out.println(Letter.values()[1]);
What code should be written at line 5 for this code to print 200?