Tag: programming languages

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Multiple choice technology programming languages

12 You have these files in the same directory. What will happen when you attempt to compile and run Class1.java if you have not already compiled Base.java //Base.java package Base; class Base{ protected void amethod(){ System.out.println("amethod"); }//End of amethod }//End of class base package Class1; //Class1.java public class Class1 extends Base{ public static void main(String argv[]){ Base b = new Base(); b.amethod(); }//End of main }//End of Class1

  1. a. Compile Error: Methods in Base not found

  2. b. Compile Error: Unable to access protected method in base class

  3. c. Compilation followed by the output "amethod"

  4. d. Compile error: Superclass Class1.Base of class Class1.Class1 not found
Reveal answer Fill a bubble to check yourself
D Correct answer
Full explanation
Multiple choice technology programming languages

17 Which of the following statements are true?

  1. a. An interface can only contain method and not variables

  2. b. Interfaces cannot have constructors

  3. c. A class may extend only one other class and implement only one interface

  4. d. Interfaces are the Java approach to addressing its lack of multiple inheritance, but require implementing classes to create the functionality of the Interfaces.
Reveal answer Fill a bubble to check yourself
B Correct answer
Full explanation
Multiple choice technology programming languages

18 You have a public class called myclass with the main method defined as follows public static void main(String parm[]){ System.out.println(parm[0]); } If you attempt to compile the class and run the program as follows java myclass hello What will happen?

  1. a. Compile time error, main is not correctly defined

  2. b. Run time error, main is not correctly defined

  3. c. Compilation and output of java

  4. d. Compilation and output of hello
Reveal answer Fill a bubble to check yourself
D Correct answer
Full explanation