1Z0-808 practice questions 71–80

1. Question 71 · 200 in bank

   Given the code fragment:

   

   What is the result?

   • AA B C
   • BA B C D E
   • CA B D E
   • DCompilation fails.

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   Answer: B

   Explanation

   Answer is B. Correct source code for test: public static void main(String[] args) { String [][] arr = {{ "A", "B", "C" }, { "D", "E" }}; for (int i = 0; i < arr.length ; i++) { for(int j = 0; j < arr[i].length; j++) { System.out.print(arr[i][j] + " "); if (arr[i][j].equals("B")) { continue; } } continue; } } -------------------------------------------------------- The confusion between the answers is in the second "for" in the source code of the question, the "for" that increments 'j'. This is the correct 'for' of the question: for (int j = 0; j < arr[i].length; j++) This is the incorrect 'for' that generates "Answer is C": for (int j = 0; j < arr.length; j++)

   Source: Adapted from community discussion — carloswork

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2. Question 72 · 200 in bank

   Select 3

   Given this class:

   

   And given this main method, located in another class:

   

   Which three lines, when inserted independently at line n1, cause the program to print a 0 balance? (Choose three.)

   • Aacct.setAmount(-acct.getAmount());
   • Bacct.amount = 0;
   • Cacct.setAmount(0);
   • Dacct.getAmount() = 0;
   • Ethis.amount = 0;
   • Facct.changeAmount(0);
   • Gacct.changeAmount(-acct.amount);

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   Answer: BCG

   Explanation

   The correct answer is BCG B - The variable "amount" in Class CheckingAccount is public, which allows the change from the instance to the main method C - method setAmount () when called from the instance in the main method allows to modify the variable "amount" in the instance of CheckingAccount G - The changeAmount () method receives in input the same value present in the CheckingAccount instance but in negative. Being public, the variable does not generate an error.

   Source: Adapted from community discussion — baledevit

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3. Question 73 · 200 in bank

   Given the code fragment:

   

   What is the result?

   • AAn exception is thrown at runtime.
   • B2014-07-31T01:01:00
   • C2014-07-31
   • D2014-09-30T00:00:00

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   Answer: B

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4. Question 74 · 200 in bank

   Given the code fragment:

   

   Which modification enables the code to print 54321?

   • AReplace line 6 with System.out.print (--x);
   • BAt line 7, insert x --;
   • CReplace line 5 with while (is Available(--x)) {
   • DReplace line 12 with return (x > 0) ? false : true;

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   Answer: A

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5. Question 75 · 200 in bank

   Given:

   

   What is the result?

   • AA B
   • BA C
   • CC C
   • DA ClassCastException is thrown only at line n1.
   • EA ClassCastException is thrown only at line n2.

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   Answer: D

   Explanation

   The letter D is correct, a ClassCastException occurs, because B2 is an object of type C and class C has no inheritance from class B, so it cannot overload.

   Source: Adapted from community discussion — iSnover

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6. Question 76 · 200 in bank

   Given the code fragment:

   

   What is the result?

   • AAnswer = 0
   • BInvalid calculation
   • CCompilation fails only at line n1.
   • DCompilation fails only at line n2.
   • ECompilation fails at line n1 and line2.

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   Answer: D

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7. Question 77 · 200 in bank

   Given:

   

   What is the result?

   • ABase DerivedA
   • BBase DerivedB
   • CDerivedB DerivedB
   • DDerivedB DerivedA
   • EA ClassCastException is thrown at runtime.

   Show answer

   Answer: B

   Explanation

   This question has no correct alternative as it prints "DerivedA DerivedB". What you have to pay in these questions is to which object the variable is pointing and we see this in the "new DerivedB", so we know that our B1 and B3 even being of the "Base" type they are "DerivedB" objects. the variable B4 is a reference of B3 which is a "DerivedB" object so we know that in the second position of the print it is a "DerivedB", even doing a cast of B2 -> Base the overload always takes the child's method then prints "DerivedA " getting "DerivedA DerivedB". To be honest, I don't know what to mark if this happens in the test, but I would mark the alternative that came closest to the truth, which is alternative B. The only one that came closest to the "b1.test()" method and hit the " b4.test()". If in doubt, follow the code:

   Source: Adapted from community discussion — iSnover

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8. Question 78 · 200 in bank

   Given:

   

   What is the result?

   • ACompilation fails.
   • Bfalse true
   • Ctrue false
   • Dtrue true
   • Efalse false

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   Answer: C

   

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9. Question 79 · 200 in bank

   Given the code fragments:

   

   And:

   

   Which statement is true?

   • AAfter line 11, three objects are eligible for garbage collection.
   • BAfter line 11, two objects are eligible for garbage collection.
   • CAfter line 11, one object is eligible for garbage collection.
   • DAfter line 11, none of the objects are eligible for garbage collection.

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   Answer: B

   Explanation

   3 objects are created and at the end only S2 is being referenced other S1 and S2 has no reference. So answer is 2 objets are eligibe for garbage collection

   Source: Adapted from community discussion — ShaileshRaj

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10. Question 80 · 200 in bank

    Given:

    

    What is the result?

    • AA B C D
    • BA C D
    • CA C D D
    • DA B C C
    • EA B D C

    Show answer

    Answer: A

    Explanation

    Correct, Answer is A. To test: public static void main(String[] args) { String ta = "A "; ta = ta.concat("B "); String tb = "C "; ta = ta.concat(tb); ta.replace("B" ,"C"); ta = ta.concat("D"); System.out.println(ta); }

    Source: Adapted from community discussion — carloswork

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1Z0-808 practice, question 71. 200 questions available.