Oracle Oracle Certifications 1Z0-808 Questions & Answers

• Question 261:

  Given the code fragment:

  // insert code here

  arr[0] = new int[3];

  arr[0][0] = 1;

  arr[0][1] = 2;

  arr[0][2] = 3;

  arr[1] = new int[4];

  arr[1][0] = 10;

  arr[1][1] = 20;

  arr[1][2] = 30;

  arr[1][3] = 40;

  Which two statements, when inserted independently at line // insert code here, enable the code to compile?

  A. int [] [] arr = null;

  B. int [] [] arr = new int [2];

  C. int [] [] arr = new int [2] [ ];

  D. int [] [] arr = new int [] [4];

  E. int [] [] arr = new int [2] [0];

  F. int [] [] arr = new int [0] [4];

  Correct Answer: CE

• Question 262:

  Given: What is result?

  

  A. Successful

  B. Unsuccessful

  C. Compilation fails

  D. An exception is thrown at runtime

  Correct Answer: C

• Question 263:

  Which two statements are true for a two-dimensional array?

  A. It is implemented as an array of the specified element type.

  B. Using a row by column convention, each row of a two-dimensional array must be of the same size.

  C. At declaration time, the number of elements of the array in each dimension must be specified.

  D. All methods of the class Object may be invoked on the two-dimensional array.

  Correct Answer: AD

• Question 264:

  Given: What is the result?

  

  A. Initialized Started

  B. Initialized Started Initialized

  C. Compilation fails

  D. An exception is thrown at runtime

  Correct Answer: B

• Question 265:

  Given: Which inserted at line 11, will provide the following output?

  

  [21, 15, 11]

  A. list.removelf(e > e%2 != 0);

  B. list.removelf(e -> e%2 != 0);

  C. Ust.removelf(e -> e%2 = 0);

  D. list.remove(e -> e%2 = 0);

  E. None of the above.

  Correct Answer: C

  In output we can see that only odd numbers present, so we need to remove only even numbers to get expected output. From Java SE 8, there is new method call removelf which takes predicate object and remove elements which satisfies predicate condition. Predicate has functional method call take object and check if the given condition met or not, if met it returns true, otherwise false. Option C we have passed correct lambda expression to check whether the number is odd or even that matches to the functional method of predicate interface. Option A is incorrect as it is invalid lambda expression. Option B is incorrect as it removes all odd numbers. Option D is incorrect as there is no remove method that takes predicate as argument. https:// docs.oracle.eom/javase/8/docs/api/java/util/ArrayList.html

• Question 266:

  Given:

  

  Which code fragment, when inserted at line 9, enables the code to print true?

  A. String str2 = str1;

  B. String str2 = new string (str1);

  C. String str2 = sb1.toString();

  D. String str2 = "Duke";

  Correct Answer: A

• Question 267:

  Given the code fragment:

  int[] array = {I, 2, 3, 4, 5};

  And given the requirements:

  Process all the elements of the array in the order of entry. Process all the elements of the array in the

  reverse order of entry. Process alternating elements of the array in the order of entry.

  Which two statements are true?

  A. Requirements 1, 2, and 3 can be implemented by using the enhanced for loop.

  B. Requirements 1, 2, and 3 can be implemented by using the standard for loop.

  C. Requirements 2 and 3 CANNOT be implemented by using the standard for loop.

  D. Requirement 1 can be implemented by using the enhanced for loop.

  E. Requirement 3 CANNOT be implemented by using either the enhanced for loop or the standard for loop.

  Correct Answer: DE

• Question 268:

  Given the code from the Greeting.Java file:

  

  Which set of commands prints Hello Duke in the console?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: C

• Question 269:

  Given the following code:

  

  What are the values of each element in intArr after this code has executed?

  A. 15, 60, 45, 90, 75

  B. 15, 90, 45, 90, 75

  C. 15, 30, 75, 60, 90 D. 15, 30, 90, 60, 90

  E. 15, 4, 45, 60, 90

  Correct Answer: C

• Question 270:

  Given the code fragment:

  

  Which code fragment, when inserted at // insert code here, enables the code to compile and and print a b c?

  A. List update (String[] strs)

  B. Static ArrayListupdate(String [] strs)

  C. Static List update (String [] strs)

  D. Static void update (String[] strs)

  E. ArrayList static update(String [] strs)

  Correct Answer: E