1Z0-808 practice questions 181–190

1. Question 181 · 200 in bank

   Given:

   

   What is the result?

   • AmyStr: 9009, myNum: 9009
   • BmyStr: 7007, myNum: 7007
   • CmyStr: 7007, myNum: 9009
   • DCompilation fails

   Show answer

   Answer: C

   Explanation

   Antwort C, ist richtig public class App { String myStr = "7007"; public void doStuff(String str) { int myNum = 0; try { String myStr = str; myNum = Integer.parseInt(myStr); } catch (NumberFormatException ne) { System.err.println("Error"); } System.out.println("myStr:" + myStr + "myNum:" + myNum); } public static void main(String[] args) { App obj = new App(); obj.doStuff("9009"); } } myStr:7007 myNum:9009

   Source: Adapted from community discussion — dya45792

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2. Question 182 · 200 in bank

   Select 2

   Which two are benefits of polymorphism? (Choose two.)

   • AFaster code at runtime
   • BMore efficient code at runtime
   • CMore dynamic code at runtime
   • DMore flexible and reusable code
   • ECode that is protected from extension by other classes

   Show answer

   Answer: BD

   Explanation

   B: More flexible and reusable code: Polymorphism makes code more flexible and reusable because it allows objects of different classes to be treated as if they are objects of the same class. This means that if you have a method that works with an object of a particular class, you can also use that method with objects of other classes that inherit from that class or implement the same interface. This can save a lot of time and effort because you don't have to write a separate method for each class.

   Source: Adapted from community discussion — dsms

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3. Question 183 · 200 in bank

   Given the code fragment:

   

   What is the result?

   • A1:2:3:4:5:
   • B1:2:3:
   • CCompilation fails.
   • DAn ArrayOutOfBoundsException is thrown at runtime.

   Show answer

   Answer: B

   Explanation

   Tested code provided by rachuk Even though both arrays have different sizes, there's no problem in reassigning their variables. Variables are still nothing else than references to objects.

   Source: Adapted from community discussion — GaelBernard

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4. Question 184 · 200 in bank

   Given:

   

   What is the result?

   • Atrue:true
   • Btrue:false
   • Cfalse:true
   • Dfalse:false

   Show answer

   Answer: C

   Explanation

   Antwort C, ist richtig public class Product { int id; String name; public Product (int id, String name) { this.id = id; this.name = name; } public static void main(String[] args) { Product p1 = new Main (101, "Pen"); Product p2 = new Main (101, "Pen"); Product p3 = p1; boolean ans1 = p1 == p2; boolean ans2 = p1.name.equals(p2.name); System.out.println(ans1 + " : " + ans2); } } false : true

   Source: Adapted from community discussion — dya45792

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5. Question 185 · 200 in bank

   Select 2

   Given the following classes:

   

   Which two options fail to compile when placed at line n1 of the main method? (Choose two.)

   • Aemployee.salary = 50_000;
   • Bdirector.salary = 80_000;
   • Cemployee.budget = 200_000;
   • Dmanager.budget = 1_000_000;
   • Emanager.stockOption = 500;
   • Fdirector.stockOptions = 1_000;

   Show answer

   Answer: CE

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6. Question 186 · 200 in bank

   Which one of the following code examples uses valid Java syntax?

   

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

   Show answer

   Answer: A

   Explanation

   A is correct, but also C. While C is not having the 'correct' static void main method, but the syntax itself is correct - which is asked. The question itself leads to answer A and C

   Source: Adapted from community discussion — WeeChungus

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7. Question 187 · 200 in bank

   Given the code fragment:

   

   What is the result?

   • A1324
   • B2313
   • C3142
   • D4231

   Show answer

   Answer: B

   Explanation

   Answer Tested : 2413 code : int n [][] = { {1,3},{2,4} }; for (int i = n.length-1; i >= 0; i--) { for(int y : n[i]) { System.out.println(y); } }

   Source: Adapted from community discussion — Omar_Deeb

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8. Question 188 · 200 in bank

   Given:

   

   What is the result?

   • AAn exception is thrown at runtime.
   • BInitialized Started Initialized
   • CInitialized Started
   • DCompilation fails.

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   Answer: D

   Explanation

   Correct answer: Compilation fails, why? init() and start() are private methods of the Caller class. So TestCall can't access to them.

   Source: Adapted from community discussion — JoseCG

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9. Question 189 · 200 in bank

   Given:

   

   What is the result?

   • ACompilation fails at line n1.
   • BInitialized Started Initialized
   • CInitialized Started
   • DCompilation fails at line n2.

   Show answer

   Answer: A

   Explanation

   class Caller{ public void init() { //private void init() { System.out.println("Initialized"); } public void start(){ //private void start(){ init(); System.out.println("Started"); } } class TestCall{ public static void main(String[] args){ Caller c = new Caller(); c.start(); c.init(); } } Answer is A and D(bcz init and start are private methods). If both public answer will be B(Initialized Started Initialized)

   Source: Adapted from community discussion — Hirushi

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10. Question 190 · 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.

    Show answer

    Answer: E

    Explanation

    public static void main(String[] args) { try { int num = 10; int div = 0; int ans = num/div; }catch(ArithmeticException ae) { ans = 0; }catch(Exception e) { System.out.println("Invalid calculation"); } System.out.println("Answer = " + ans); }

    Source: Adapted from community discussion — juipeng

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1Z0-808 practice, question 181. 200 questions available.