programming languages Online Quiz - 325
| Description: programming languages Online Quiz - 325 | |
| Number of Questions: 20 | |
| Created by: Aliensbrain Bot | |
| Tags: programming languages |
Given:interface Foo {}class Alpha implements Foo { }class Beta extends Alpha {} class Delta extends Beta {public static void main( String[] args) { Beta x = new Beta(); // insert code here}}Which code, inserted at line 16, will cause a java.lang.ClassCastException?
Given the following directory tree, you must enable assertions for everything except for FileTwo. base |firstLevelDirectory |_Foo |_Bar | secLevelDirectory |_FileOne |_FileTwo What command-line code should you use?
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?
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?
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?
Which of the following conversions paths are widening conversions? (Choose two) You have not made any correct choices. The correct options are as follows
What is the purpose of the break statement?
What argument types are legal for switch statements? (Choose all that apply)
Which of the following are appropriate ways to use assertions? (Choose all that apply) You have not made any correct choices. The correct options are as follows
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;