Tag: technology

Questions Related to technology

You are considering four different "if" statements for the following code: public class IsItSame { public static void main(String [] args ) { int TheAnswer = 0; IsItSame x = new IsItSame(); Object y = x; IsItSame z = new IsItSame(); if (z == x) TheAnswer = 0; if (y == x) TheAnswer = 1; if (y == z) TheAnswer = 2; if (y.equals(z) ) TheAnswer = 3: if (x.equals(z) ) TheAnswer = 4; if (z.equals(y) ) TheAnswer = 5; System.out.printIn("The answer is " + TheAnswer); } } What will be printed out once the code is compiled and executed?
technology programming languages
    1. The answer is 0
    1. The answer is 1
    1. The answer is 2
    1. The answer is 3
    1. The answer is 4
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Correct Option: B

Which of the following options is a benefit of a Set or SortedSet? Incorrect. The correct option is as follows
technology programming languages
    1. Use of an index
    1. Lack of duplicates
    1. Use of non-unique keys
    1. Use of unique keys
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Correct Option: C

Given: 11. public class Ball { 12. public enum Color { RED, GREEN, BLUE }; 13. public void foo() { 14. // insert code here 15. { System.out.println(c); } 16. } 17. } Which code inserted at line 14 causes the foo method to print RED, GREEN, and BLUE?
technology programming languages

  1. for( Color c : Color.values())

  2. for( Color c = RED; c <= BLUE; c++)

  3. for( Color c; c.hasNext() ; c.next())

  4. for( Color c = Color[0]; c <= Color[2]; c++)

  5. for( Color c = Color.RED; c <= Color.BLUE; c++)

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Correct Option: A

You have the following code: public class Java { static double dSyntaxs; public static void main (String [] args) { Java IsItTrue = new Java(); IsItTrue.TrueSyntax(); } public void TrueSyntax() { System.out.println("Its: " + dSyntaxs); } } What would the output be?
technology programming languages
    1. Its: 1
    1. Its: 0
    1. Its: true

  4. 4 Its: false

    1. Its: 0.0
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Correct Option: E

which methods would prevent the execution of a thread? (Choose all that apply)
technology programming languages
    1. sleep()
    1. yield()
    1. run()
    1. join()
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Correct Option: A,B,D

Given: 10. public class Fabric 11. public enum Color { 12. RED(0xff0000), GREEN(0x00ff00), BLUE(0x0000ff); 13. private final int rgb; 14. Color( int rgb) { this.rgb = rgb; } 15. public int getRGB() { return rgb; } 16. }; 17. public static void main( String[] argv) { 18. // insert code here 19. } 20. } Which two code fragments, inserted independently at line 18, allow the Fabric class to compile?
technology programming languages

  1. Color skyColor = BLUE;

  2. Color treeColor = Color.GREEN;

  3. Color purple = new Color( 0xff00ff);

  4. if( RED.getRGB() < BLUE.getRGB() ) {}

  5. Color purple = Color.BLUE + Color.RED;

  6. if( Color.RED.ordinal() < Color.BLUE.ordinal() ) {}

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Correct Option: B,F

Which of the following conversions paths are widening conversions? (Choose two) You have not made any correct choices. The correct options are as follows

technology programming languages

  1. 1From a int to a short

  2. 2From a char to an int

  3. 3From a short to an int

  4. 4From a double to a float

  5. 5From a float to a long

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Correct Option: B,C

A method is declared as protected. What classes can access this method? (Choose two. Each option is a correct answer.)

technology programming languages
    1. Classes in the same package
    1. All classes
    1. Only the class within the package that defined the method
    1. Classes that inherit access
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Correct Option: A,D

What is the purpose of the break statement?
technology programming languages
    1. It jumps out of the loop back to the calling method.
    1. It jumps out of the loop to the next statement after the loop.
    1. It stops the execution of the program and of the virtual machine.
    1. It stops the innermost iteration and continues with the next iteration of the loop.
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Correct Option: B

Between which two lines should you insert a break or a continue statement to print the message "Please close the door. I feel a draft. Thank you"? (Line numbers are included only for clarity's sake) 1. String door="open"; 2. boolean draft=false; 3. boolean shivers=false; 4. while (door=="open") { 5. draft=true; 6. System.out.println("Please close the door."); 7. if (draft) { 8. shivers=true; 9. System.out.println("I feel a draft."); 10. door="close"; 11. if (shivers) { 12. System.out.println("I'm shivering."); 13. } 14. } 15. } 16. if (door=="close") { 17. System.out.println("Thank you"); 18. shivers=false; 19. }
technology programming languages
    1. Replace lines 7 to 14 with a break statement.
    1. Replace lines 7 to 14 with a continue statement.
    1. Replace line 12 with a continue statement.
    1. Insert a break statement between lines 16 and 17.
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Correct Option: C