Oracle Oracle Certifications 1Z0-808 Questions & Answers

• Question 211:

  Given:

  public class ColorTest {

  public static void main(String[] args) {

  String[] colors = {"red", "blue","green","yellow","maroon","cyan"};

  int count = 0;

  for (String c : colors) {

  if (count >= 4) {

  break;

  }

  else {

  continue;

  }

  if (c.length() >= 4) {

  colors[count] = c.substring(0,3);

  }

  count++;

  }

  System.out.println(colors[count]);

  }

  }

  What is the result?

  A. Yellow

  B. Maroon

  C. Compilation fails

  D. A StringIndexOutOfBoundsException is thrown at runtime.

  Correct Answer: C

  Explanation: The line, if (c.length() >= 4) {, is never reached. This causes a compilation error.

  Note: The continue statement skips the current iteration of a for, while , or do-while loop. An unlabeled break statement terminates the innermost switch, for, while, or do- while statement, but a labeled break terminates an outer statement.

• Question 212:

  Given:

  

  And the commands:

  Javac Jump.java Java Jump crazy elephant is always What is the result?

  A. Lazy lion is jumping

  B. Lion is always jumping

  C. Crazy elephant is jumping

  D. Elephant is always jumping

  E. Compilation fails

  Correct Answer: B

• Question 213:

  Given the definitions of the MyString class and the Test class:

  

  What is the result?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: C

• Question 214:

  Given the code fragment:

  

  What is the result?

  A. 28false29 true

  B. 285 < 429 true

  C. true true

  D. compilation fails

  Correct Answer: C

• Question 215:

  Given:

  public class MyClass {

  public static void main(String[] args) {

  String s = " Java Duke ";

  int len = s.trim().length();

  System.out.print(len);

  }

  }

  What is the result?

  A. 8

  B. 9

  C. 11

  D. 10

  E. Compilation fails

  Correct Answer: B

  Explanation: Java - String trim() Method

  This method returns a copy of the string, with leading and trailing whitespace omitted.

• Question 216:

  Given:

  

  What is the result?

  A. True false

  B. True null

  C. Compilation fails

  D. A NullPointerException is thrown at runtime

  Correct Answer: A

• Question 217:

  Which statement is/are true?

  A. Default constructor only contains "super();" call.

  II. We can't use any access modifier with a constructor.

  III. A constructor should not have a return type.

  B. Only I.

  C. Only II.

  D. Only I and II.

  E. Only I and III.

  F. AIL

  Correct Answer: D

  Statement I is correct as the default constructor only contains super0 call Statement II is incorrect as we can use any access modifier with a constructor. Statement III is correct as constructor can't have return type, even void. So option D is correct. httpsy/docs.oracle.com/javase/tutorial/iava/javaOO/construaors.html

• Question 218:

  Given the fragments:

  

  Which line causes a compilation error?

  A. Line n1

  B. Line n2

  C. Line n3

  D. Line n4

  Correct Answer: A

• Question 219:

  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.

  Correct Answer: D

  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 220:

  Given:

  

  What is the result?

  A. true true

  B. true false

  C. false true D. false false

  E. Compilation fails

  Correct Answer: B