Tag: programming languages

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Multiple choice technology programming languages

Given: 1. package sun.scjp; 2. public enum Color { RED, GREEN, BLUE } 1. package sun.beta; 2. // insert code here 3. public class Beta { 4. Color g = GREEN; 5. public static void main( String[] argv) 6. { System.out.println( GREEN); } 7. } The class Beta and the enum Color are in different packages. Which two code fragments, inserted individually at line 2 of the Beta declaration, will allow this code to compile?

  1. import sun.scjp.; import static sun.scjp.Color.;

  2. import sun.scjp.Color; import static sun.scjp.Color.*;

  3. import sun.scjp.Color.*;

  4. import sun.scjp.Color; import static sun.scjp.Color.GREEN;
Reveal answer Fill a bubble to check yourself
B,D Correct answer
Full explanation
Multiple choice technology programming languages

Class TestException 1. public class TestException extends Exception { 2. } Class A: 1. public class A { 2. 3. public String sayHello(String name) throws TestException { 4. 5. if(name == null) { 6. throw new TestException(); 7. } 8. 9. return “Hello “+ name; 10. } 11. 12. } A programmer wants to use this code in an application: 45. A a=new A(); 46. System.out.println(a.sayHello(”John”)); Which are true?

  1. Line 46 will compile if the enclosing method throws a TestException.

  2. Class A will not compile.

  3. Line 46 will compile if enclosed in a try block, where TestException is caught

  4. Line 45 can throw the unchecked exception TestException.
Reveal answer Fill a bubble to check yourself
A,C Correct answer
Full explanation