1Z0-808 practice questions 11–20

1. Question 11 · 200 in bank

   Given:

   

   And given the code fragment: Book book1 = new EBook(); book1.readBook(); Which option enables the code to compile?

   

   • AOption A
   • BOption B
   • COption C
   • DOption D

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   Answer: D

   Explanation

   The answer is letter D, answers A and B are clearly wrong, C would also be right, but what shows that it is wrong is the code fragment that calls the class directly. You cannot instantiate abstract classes directly as it was done in the code snippet, so the letter D is correct, implement the abstracted method.

   Source: Adapted from community discussion — iSnover

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2. Question 12 · 200 in bank

   Given:

   

   What is the result?

   • Afalse, false
   • Bfalse, true
   • Ctrue, false
   • Dtrue, true

   Show answer

   Answer: C

   Explanation

   Example A: String a = "hello" + " world!"; String b = "hello world!"; boolean compare = (a == b); // This return true Example B: a = "hello"; b = "hel" + "lo"; compare = (a == b); // This return true Example C: a = "Bye"; a += " bye!"; b = "Bye bye!"; compare = (a == b); // This return false System.out.println(compare);

   Source: Adapted from community discussion — akbiyik

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3. Question 13 · 200 in bank

   Select 2

   Which two statements are true? (Choose two.)

   • AError class is unextendable.
   • BError class is extendable.
   • CError is a RuntimeException.
   • DError is an Exception.
   • EError is a Throwable.

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   Answer: BE

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4. Question 14 · 200 in bank

   Given the code fragment:

   

   What is the result?

   • ACompilation fails.
   • B0 Found
   • C1 Found
   • D3 Found

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   Answer: A

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5. Question 15 · 200 in bank

   Given the code fragment:

   

   What is the result?

   • AAn exception is thrown at runtime.
   • B07-31-2014
   • C2014-07-31
   • D2014-09-30

   Show answer

   Answer: C

   Explanation

   Answer is C (Fixing punctuation and whitespace). To test: public static void main(String[] args) { LocalDateTime dt = LocalDateTime.of(2014, 7, 31, 1, 1); dt.plusDays(30); dt.plusMonths(1); System.out.print(dt.format(DateTimeFormatter.ISO_DATE)); }

   Source: Adapted from community discussion — carloswork

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6. Question 16 · 200 in bank

   Given:

   

   And given the commands:

   

   What is the result?

   • AJava SE
   • BJava EE
   • CCompilation fails at line n1.
   • DA NullPointerException is thrown at runtime.

   Show answer

   Answer: A

   Explanation

   The right answer is the letter A, because in the command line passed the argument 1, that is, the String "1" is in the 0 place of the list with the indexing, but the list has size 1, so it is True printing " Java SE". If you take the raw code and play it in the IDE, it will print the letter B, but remembering that the args array is a list with no arguments and the argument "1" was passed to the console.

   Source: Adapted from community discussion — iSnover

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7. Question 17 · 200 in bank

   Given the code fragments:

   

   What is the result?

   • ACompilation fails only at line n2.
   • BRTool::export Tool::export
   • CTool::export Tool:export
   • DCompilation fails only at line n1.
   • ECompilation fails at both line n1 and line n2.

   Show answer

   Answer: D

   Explanation

   D. By default, method declaration in an interface is implicitly Public abstract. Overiding with protected is a more restrictive access modifier.

   Source: Adapted from community discussion — letmein2

   References

   • Oracle documentation

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8. Question 18 · 200 in bank

   Given the code fragment:

   

   What is the result?

   • AAn exception is thrown at runtime.
   • BCompilation fails.
   • C13480.0
   • D13480.02

   Show answer

   Answer: D

   Explanation

   Answer is D. To test: public static void main(String[] args) { float var1 = (12_345.01 <= 123_45.00) ? 12_456 : 124_56.02f; float var2 = var1 + 1024; System.out.println(var2); }

   Source: Adapted from community discussion — carloswork

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9. Question 19 · 200 in bank

   Given:

   

   And given the code fragment:

   

   What is the result?

   • A300:300 200:300
   • B300:100 200:300
   • C300:0 0:300
   • D100:300 300:200

   Show answer

   Answer: D

   Explanation

   The answer is the letter D. Even though stVar is static, but it was printed before receiving the new value, so in line 3 it still had the value of 100.

   Source: Adapted from community discussion — iSnover

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10. Question 20 · 200 in bank

    Given:

    

    And given the code fragment:

    

    What is the result?

    • AC2C2
    • BC1C2
    • CC1C1
    • DCompilation fails

    Show answer

    Answer: D

    Explanation

    D. C2 and I are not parent/child class to each other. Implicit casting will not work. At least, we will need to explicitly cast C2 s = (C2) obj2; I t = (I) obj1;

    Source: Adapted from community discussion — letmein2

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1Z0-808 practice, question 11. 200 questions available.