Oracle Oracle Certifications 1Z0-808 Questions & Answers

• Question 331:

  Given the code fragment: What is the result?

  

  A. Reading Card Checking Card

  B. Compilation fails only at line n1.

  C. Compilation fails only at line n2.

  D. Compilation fails only at line n3.

  E. Compilation fails at both line n2 and line n3.

  Correct Answer: D

• Question 332:

  Given:

  

  And given the commands:

  javac Test.Java

  Java Test Hello

  What is the result?

  A. Success

  B. Failure

  C. Compilation fails.

  D. An exception is thrown at runtime

  Correct Answer: A

• Question 333:

  Given:

  

  What is the result?

  A. 10 : 22 : 20

  B. 10 : 22 : 22

  C. 10 : 22 : 6

  D. 10 : 30 : 6

  Correct Answer: D

• Question 334:

  Given the code fragment:

  StringBuilder sb = new StringBuilder ( ) ;

  Sb.append ("world");

  Which code fragment prints Hello World?

  A. sb.insert(0,"Hello "); System.out.println(sb);

  B. sb.append(0,"Hello "); System.out.println(sb);

  C. sb.add(0,"Hello "); System.out.println(sb);

  D. sb.set(0,"Hello "); System.out.println(sb);D

  Correct Answer: A

  Explanation: The java.lang.StringBuilder.insert(int offset, char c) method inserts the string representation of the char argument into this sequence. The second argument is inserted into the contents of this sequence at the position indicated by offset. The length of this sequence increases by one.The offset argument must be greater than or equal to 0, and less than or equal to the length of this sequence.

  Reference: Java.lang.StringBuilder.insert() Method

• Question 335:

  Given the code fragment:

  

  What is the result?

  A. true true

  B. true false

  C. false false

  D. false true

  Correct Answer: C

• Question 336:

  Given:

  public class String1 {

  public static void main(String[] args) {

  String s = "123";

  if (s.length() >2)

  A. concat("456"); for(int x = 0; x <3; x++) s += "x"; System.out.println(s); } } What is the result?

  B. 123

  C. 123xxx

  D. 123456

  E. 123456xxx

  F. Compilation fails

  Correct Answer: B

  Explanation: 123xxx

  The if clause is not applied.

  Note: Syntax of if-statement:

  if ( Statement ) {

  }

• Question 337:

  Given:

  import java.util.*;

  public class Ref {

  public static void main(String[] args) {

  StringBuilder s1 = new StringBuilder("Hello Java!");

  String s2 = s1.toString();

  List lst = new ArrayList(); lst.add(s2);

  System.out.println(s1.getClass());

  System.out.println(s2.getClass());

  System.out.println(lst.getClass());

  }

  }

  What is the result?

  A. class java.lang.String class java.lang.String class java.util.ArrayList

  B. class java.lang.Object class java.lang. Object class java.util.Collection

  C. class java.lang.StringBuilder class java.lang.String class java.util.ArrayList

  D. class java.lang.StringBuilder class java.lang.String class java.util.List

  Correct Answer: C

  Explanation: class java.lang.StringBuilder class java.lang.String class java.util.ArrayList

• Question 338:

  Given the following code for a Planet object:

  

  What is the output?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  E. Option E

  Correct Answer: B

• Question 339:

  Given:

  

  What is the result?

  A. Good Day! Good Luck!

  B. Good Day! Good Day!

  C. Good Luck! Good Day!

  D. Good Luck! Good Luck!

  E. Compilation fails

  Correct Answer: E

• Question 340:

  Given:

  

  What is the result?

  A. Base DerivedA

  B. Base DerivedB

  C. DerivedB DerivedB

  D. DerivedB DerivedA

  E. A classcast Except ion is thrown at runtime.

  Correct Answer: C