1Z0-819 | Top Tips Of Latest 1Z0-819 Prep

NEW QUESTION 1
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 dd'th of' MMM yyyy”
• C. “eeee d+”th of”+ MMMM yyyy”
• D. “eeee d’th of’ MMMM yyyy”

Answer: B

NEW QUESTION 2
Given:

What is the result?

• A. Good Morning, Potter
• B. Good Night, Potter
• C. Good Morning, Harry
• D. Good Night, Harry

Answer: B

Explanation:

NEW QUESTION 3
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(a > ((Widget)a).getPrice() > 20.00).
• B. Replace line 1 with List<Widget> widgetStream = widgets.stream();.
• C. Replace line 5 with widgetStream.filter((Widget a) > a.getPrice() > 20.00).
• D. Replace line 4 with Stream<Widget> widgetStream = widgets.stream();.

Answer: AD

NEW QUESTION 4
Given the code fragment:

What is the output?

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

Answer: D

NEW QUESTION 5
Given the code fragment:

What is the result?

• A. false true true
• B. true false false
• C. false false true
• D. false true false

Answer: D

Explanation:

NEW QUESTION 6
Given:

What is the result?

• A. 42
• B. The compilation fails due to an error in line 4.
• C. 17
• D. The compilation fails due to an error in line 3.
• E. The compilation fails due to an error in line 2.
• F. The compilation fails due to an error in line 1.
• G. The compilation fails due to an error in line 5.

Answer: A

NEW QUESTION 7
Given:

What is the output?

• A. 300
• B. Exception
• C. 200
• D. 100

Answer: A

Explanation:

NEW QUESTION 8
Given:

What is the result?

• A. [0,0] = Red[0,1] = White[1,0] = Black[1,1] = Blue[2,0] = Yellow[2,1] = Green[3,0] = Violet
• B. [0,0] = Red[1,0] = Black[2,0] = Blue
• C. java.lang.ArrayIndexOutOfBoundsException thrown
• D. [0,0] = Red[0,1] = White[1,0] = Black[2,0] = Blue[2,1] = Yellow[2,2] = Green[2,3] = Violet

Answer: D

Explanation:

NEW QUESTION 9
Given:

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

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

Answer: BD

NEW QUESTION 10
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: packagejava does not exist
• B. javac compiles Mycar.java without errors or warnings.
• C. javac fails to compile the class and prints the error message, C:\workspace4\Mycar.java:1:error: expected import java.lang
• D. javac fails to compile the class and prints the error message, Error: Could not find or load main class Mycar.class

Answer: B

NEW QUESTION 11
Given:

and

Which code fragment on line 1 makes the s1 set contain the names of all employees born before January 1, 1989?

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

Answer: B

NEW QUESTION 12
Which three initialization statements are correct? (Choose three.)

• A. int x = 12_34;
• B. short sh = (short)‘A’;
• C. String contact# = “(+2) (999) (232)”;
• D. boolean true = (4 == 4);
• E. float x = 1.99;
• F. int[][] e = {{1,1},{2,2}};
• G. byte b = 10;char c = b;

Answer: ABF

NEW QUESTION 13
Which code is correct?

• A. Runnable r = “Message” > System.out.println();
• B. Runnable r = () > System.out::print;
• C. Runnable r = () -> {System.out.println(“Message”);};
• D. Runnable r = > System.out.println(“Message”);
• E. Runnable r = {System.out.println(“Message”)};

Answer: C

NEW QUESTION 14
Given:

What is the result?

• A. Map: 0 Keys: 0 Values: 0
• B. The compilation fails.
• C. Map: 4 Keys: 4 Values: 4
• D. Map: 4 Keys: 0 Values: 0
• E. Map: 0 Keys: 4 Values: 4

Answer: D

Explanation:

NEW QUESTION 15
Given:

What is the result?

• A. Orange Juice
• B. The compilation fails.
• C. Orange Juice Apple Pie Lemmon Ice Raspberry Tart
• D. The program prints nothing.

Answer: C

Explanation:

NEW QUESTION 16
Given:

Which two statements are valid to be written in this interface? (Choose two.)

• A. public abstract void methodB();
• B. final void methodG(){System.out.println(“G”);}
• C. private abstract void methodC();
• D. public String methodD();
• E. public int x;
• F. final void methodE();
• G. public void methodF(){System.out.println(“F”);}

Answer: AD

NEW QUESTION 17
Given:

and

What is the result?

• A. A NullPointerException is thrown at run time.
• B. The compilation fails.
• C. 1Null null
• D. 111
• E. A ClassCastException is thrown at run time.

Answer: B

Explanation:

NEW QUESTION 18
Given:

Which two lines cause compilation errors? (Choose two.)

• A. line 12
• B. line 6
• C. line 9
• D. line 8
• E. line 7

Answer: BE

NEW QUESTION 19
Which two statements independently compile? (Choose two.)

• A. List<? super Short> list = new ArrayList<Number>();
• B. List<? super Number> list = new ArrayList<Integer>();
• C. List<? extends Number> list = new ArrayList<Byte>();
• D. List<? extends Number> list = new ArrayList<Object>();
• E. List<? super Float> list = new ArrayList<Double>();

Answer: AC

Explanation:

NEW QUESTION 20
Given:

What is the result?

• A. JoeMarry
• B. Joenull
• C. nullnull
• D. nullMary

Answer: D

Explanation:

NEW QUESTION 21
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