Oracle Oracle Certifications 1Z0-808 Questions & Answers

• Question 321:

  Given: What is the output?

  

  A. 2015-03-27

  B. 2015-04-27

  C. 2015-02-27

  D. Compilation fails due to error at line 6.

  E. Compilation fails due to error at line 8.

  Correct Answer: A

  To create we have used following method with LocalDate class; public static LocalDate of(intyear, int month, int dayOfMonth) Here we need to remember that month is not zero based so if you pass 1 for month, then month will be January. Then we have used period object of 1 day and add to date object which makes current date to next day, so final output is 2015-03-27. Hence option A is correct. https://docs.oracle.com/javase/tutorial/datetime/iso/ datetime.html

• Question 322:

  Given:

  

  What is the result?

  A. 10:20

  B. 0:20

  C. Compilation fails at line n1

  D. Compilation fails at line n2

  Correct Answer: D

• Question 323:

  Given:

  

  What is the result?

  A. Red 0 Orange 0 Green 3

  B. Red 0 Orange 0 Green 6

  C. Red 0 Orange 1

  D. Green 4

  E. Compilation fails

  Correct Answer: E

• Question 324:

  Which statement is true about the default constructor of a top-level class?

  A. It can take arguments.

  B. It has private access modifier in its declaration.

  C. It can be overloaded.

  D. The default constructor of a subclass always invokes the no-argument constructor of its superclass.

  Correct Answer: D

  Explanation: In both Java and C#, a "default constructor" refers to a nullary constructor that is automatically generated by the compiler if no constructors have been defined for the class. The default constructor is also empty, meaning that it does nothing. A programmer- defined constructor that takes no parameters is also called a default constructor.

• Question 325:

  Given the code fragment:

  

  What is the result?

  A. 2 4

  B. 0 2 4 6

  C. 0 2 4

  D. Compilation fails

  Correct Answer: C

• Question 326:

  Given:

  public class Painting {

  private String type;

  public String getType() {

  return type;

  }

  public void setType(String type) {

  this.type = type;

  }

  public static void main(String[] args) {

  Painting obj1 = new Painting();

  Painting obj2 = new Painting();

  obj1.setType(null);

  obj2.setType("Fresco");

  System.out.print(obj1.getType() + " : " + obj2.getType());

  }

  }

  What is the result?

  A. : Fresco

  B. null : Fresco

  C. Fresco : Fresco

  D. A NullPointerException is thrown at runtime

  Correct Answer: B

• Question 327:

  Given the code fragment:

  

  What is the result if the integer aVar is 9?

  A. 10 Hello World!

  B. Hello Universe!

  C. Hello World!

  D. Compilation fails.

  Correct Answer: A

• Question 328:

  Given:

  

  A. Ym Xm2

  B. Ym Xm1

  C. Compilation fails

  D. A ClassCastException is thrown at runtime

  Correct Answer: B

• Question 329:

  public class ForTest {

  public static void main(String[] args) {

  int[] arrar = {1,2,3};

  for ( foo ) {

  } } }

  Which three are valid replacements for foo so that the program will compiled and run?

  A. int i: array

  B. int i = 0; i < 1; i++

  C. ;;

  D. ; i < 1; i++

  E. ; i < 1;

  Correct Answer: ABC

• Question 330:

  Given the code fragment:

  public class Test {

  static String[][] arr =new String[3][];

  private static void doPrint() {

  //insert code here

  }

  public static void main(String[] args) {

  String[] class1 = {"A","B","C"};

  String[] class2 = {"L","M","N","O"};

  String[] class3 = {"I","J"};

  arr[0] = class1;

  arr[1] = class2;

  arr[2] = class3;

  Test.doPrint();

  }

  }

  Which code fragment, when inserted at line //insert code here, enables the code to print COJ?

  A. int i = 0; for (String[] sub: arr) { int j = sub.length -1; for (String str: sub) { System.out.println(str[j]); i++; } }

  B. private static void doPrint() { for (int i = 0;i < arr.length;i++) {

  int j = arr[i].length-1;

  System.out.print(arr[i][j]);

  }

  }

  C. int i = 0; for (String[] sub: arr[][]) { int j = sub.length; System.out.print(arr[i][j]); i++; }

  D. for (int i = 0;i < arr.length-1;i++) { int j = arr[i].length-1; System.out.print(arr[i][j]); i++; }

  Correct Answer: B

  Incorrect:

  not A: The following line causes a compile error:

  System.out.println(str[j]);

  Not C: Compile erro line:

  for (String[] sub: arr[][])

  not D: Output: C