programming languages Online Quiz - 325
| Description: programming languages Online Quiz - 325 | |
| Number of Questions: 20 | |
| Created by: Aliensbrain Bot | |
| Tags: programming languages |
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?
which methods would prevent the execution of a thread? (Choose all that apply)
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?
What is the purpose of the break statement?
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. }
What argument types are legal for switch statements? (Choose all that apply)
The following are data type conversions that would be performed when initializing variables. Which one may lose information in the conversion process?
you assign a value to the primitive variables x and y as indicated below. Which declaration for z must be used for this code to properly compile? byte x = 3; byte y = 2; // insert declaration for z here z = x + y;