Oracle 1Z0-808 Online Practice Questions and Exam Preparation

Oracle 1Z0-808 Online Questions & Answers

• Question 81:

  Given:

  

  What is the result?

  A. Compilation fails.
  B. false true
  C. true false
  D. true true
  E. false false
  C. true false

  ---

  Explanation/Reference:

  

• Question 82:

  Given the following code for the classes MyException and Test:

  

  What is the result?

  A. A
  B. B
  C. Either A or B
  D. A B
  E. A compile time error occurs at line n1
  B. B

• Question 83:

  Given the code fragment: Which action enables it to print AB?

  

  A. Comment lines 18 to 21.
  B. Comment line 20.
  C. Comment line 19.
  D. Comment line 16.
  C. Comment line 19.

  ---

  Explanation/Reference:

  Answer is C.

  List lst = Arrays.asList("A","B", "C","D" );

  Iterator< String> itr = lst.iterator();

  while(itr.hasNext()) {

  String e=itr.next();

  if (e=="C") {

  break;

  }

  else {

  // continue;

  System.out.println(e);

  }

  }

  // AB

• Question 84:

  Given:

  

  Which code fragment, when inserted at line 7, enables the code print true?

  

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

• Question 85:

  Given:

  

  Which is true?

  A. Sum for 0 to 0 = 55
  B. Sum for 0 to 10 = 55
  C. Compilation fails due to error on line 6.
  D. Compilation fails due to error on line 7.
  E. An Exception is thrown at the runtime.
  D. Compilation fails due to error on line 7.

  ---

  Explanation/Reference:

  Loop variables scope limited to that enclosing loop. So in this case, the scope of the loop variable x declared at line 5, limited to that for loop. Trying to access that variable at line 7, which is out of scope of the variable x, causes a compile time error. So compilation fails due to error at line 7. Hence option D is correct. Options A and B are incorrect, since code fails to compile. Reference: httpsy/docs.oracle.com/javase/tutorial/java/nutsandbolts/variables.html

• Question 86:

  Given the code fragment:

  

  Which code fragment prints red: blue: small: medium?

  

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

  ---

  Explanation/Reference:

• Question 87:

  Given: What is the result?

  

  A. 200.0 : 100.0
  B. 400.0 : 200.0
  C. 400.0 : 100.0
  D. Compilation fails.
  C. 400.0 : 100.0

• Question 88:

  Given:

  

  What is the result?

  A. 100 0 : 100 200:
  B. 100 0 : 100 0 :
  C. 100 200 : 100 200 :
  D. 100 200 : 0 0 :
  D. 100 200 : 0 0 :

  ---

  Explanation/Reference:

• Question 89:

  Given the code fragment:

  

  What is the result?

  A. 1 2 3 0 0 1 2 3 0 0
  B. An Exception is thrown at run time.
  C. 1 2 3 0 0 1 2 3
  D. 1 2 3 1 2 3
  D. 1 2 3 1 2 3

  ---

  Explanation/Reference:

  

• Question 90:

  What is the proper way to defined a method that take two int values and returns their sum as an int value?

  A. int sum(int first, int second) { first + second; }
  B. int sum(int first, second) { return first + second; }
  C. sum(int first, int second) { return first + second; }
  D. int sum(int first, int second) { return first + second; }
  E. void sum (int first, int second) { return first + second; }
  D. int sum(int first, int second) { return first + second; }