View All 1Z0-819 Actual Exam Questions Answers and Explanations for Free Feb-2024 [Q143-Q164]

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View All 1Z0-819 Actual Exam Questions Answers and Explanations for Free Feb-2024

The Most In-Demand Oracle 1Z0-819 Pass Guaranteed Quiz 

NEW QUESTION # 143
Given:

What is the result?

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

Answer: B

Explanation:


NEW QUESTION # 144
Given:

Which is true?

  • A. The compilation succeeds.
  • B. The compilation fails due to an error in line 9.
  • C. The compilation fails due to an error in line 10.
  • D. The compilation fails due to an error in line 6.
  • E. The compilation fails due to an error in line 4.
  • F. The compilation fails due to an error in line 7.
  • G. The compilation fails due to an error in line 2.

Answer: D


NEW QUESTION # 145
Given:

What is the result?

  • A. 0
  • B. 1
  • C. 2
  • D. 3

Answer: A

Explanation:


NEW QUESTION # 146
Given:

Which statement on line 1 enables this code to compile?

  • A. Function<int, int> f = n > n * 2;
  • B. Function<Integer, Integer> f = n > n * 2;
  • C. Function<Integer> f = n > n * 2;
  • D. Function<int> f = n > n * 2;
  • E. Function f = n > n * 2;

Answer: B

Explanation:


NEW QUESTION # 147
Given:

What is the result?

  • A. The compilation fails.
  • B. abcd
  • C. adf
  • D. abdf
  • E. abd

Answer: B


NEW QUESTION # 148
Which code fragment compiles?

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

Answer: B

Explanation:


NEW QUESTION # 149
Given:

and:

Which code, when inserted on line 10, prints the number of unique localities from the roster list?

  • A. map(e > e.getLocality())
    .count();
  • B. .filter(Employee::getLocality)
    .distinct()
    .count();
  • C. .map(e > e.getLocality())
    .collect(Collectors.toSet())
    .count();
  • D. .map(Employee::getLocality)
    .distinct()
    .count();

Answer: B


NEW QUESTION # 150
Given:

executed using command:
java Hello "Hello World" Hello World
What is the output?

  • A. An exception is thrown at runtime.
  • B. Hello WorldHelloWorld
  • C. Hello WorldHello World
  • D. HelloHello WorldHelloWorld
  • E. Hello World Hello World

Answer: E


NEW QUESTION # 151
Given:

What is the result?

  • A. It throws a runtime exception.
  • B. Value of Euler = 2.71828
  • C. The code does not compile.
  • D. Value of Euler = "2.71828"

Answer: C


NEW QUESTION # 152
A company has an existing sales application using a Java 8 jar file containing packages:
com.company.customer;
com.company.customer.orders;
com.company.customer.info;
com.company.sales;
com.company.sales.leads;
com.company.sales.closed;
com.company.orders;
com.company.orders.pending;
com.company.orders.shipped.
To modularize this jar file into three modules, customer, sales, and orders, which module-info.java would be correct?
A)

B)

C)

D)

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

Answer: C


NEW QUESTION # 153
Given:

What is the type of the local variable x?

  • A. String[ ]
  • B. String
  • C. Character
  • D. char

Answer: B


NEW QUESTION # 154
Given these two classes:


And given this fragment:

Which describes the fragment?

  • A. It is subject to livelock.
  • B. It throws IllegalMonitorStateException.
  • C. It is subject to deadlock.
  • D. The code does not compile.

Answer: D


NEW QUESTION # 155
Given:

What is the output?

  • A. Message from Copier: Attempt00
  • B. A runtime error is thrown.
  • C. Message from Abstract Copier: Attempt00
  • D. A compilation error is thrown.

Answer: D


NEW QUESTION # 156
Given:

Which two method implementations are correct, when inserted independently in line 1? (Choose two.)

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

Answer: C,D


NEW QUESTION # 157
Given:

What code must you insert on Line 1 to enable the code to print Hello world?

  • A. Hello myH = new Hello(); Greeting myG = new Greeting(); myG.sayHi ();
  • B. Hello myH = new Hello();
    Hello.Greeting myG = myH.new Hello.Greeting();
    myG.sayHi();
  • C. Hello.Greeting myG = new Hello.Greeting() myG.sayHi();
  • D. Hello myH = new Hello();
    Hello.Greeting myG = myH.new Greeting();
    myG.sayHi();

Answer: D


NEW QUESTION # 158
Given:

What is the result?

  • A. TuesdayUnknown
  • B. The compilation fails.
  • C. WorkingUnknown
  • D. Tuesday
  • E. Unknown
  • F. Working

Answer: E

Explanation:


NEW QUESTION # 159
Given:

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

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

Answer: C,G


NEW QUESTION # 160
Given:

Which expression when added at line 1 will produce the output of 1.17?

  • A. float z = Math.round((int)(x/y),2);
  • B. float z = (float)(Math.round((float)x/y*100)/100);
  • C. float z = Math.round((float)x/y*100)/(float)100;
  • D. float z = Math.round((float)x/y,2);

Answer: C

Explanation:


NEW QUESTION # 161

And the code fragment:

Which situation will occur on code fragment execution?

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

Answer: B


NEW QUESTION # 162
Given the code fragment:

What is the result?

  • A. gh ij kl
  • B. The compilation fails.
  • C. gj hk il
  • D. ghi jkl
  • E. An ArrayIndexOutofBoundsException is thrown at runtime.

Answer: E


NEW QUESTION # 163
Given:

and

What is the result?

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

Answer: B

Explanation:


NEW QUESTION # 164
......

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