Author Question: Show the output of running the class Test in the following code lines:interface A {}class C { }class ... (Read 45 times)

arivle123 · **on:** May 6, 2020

Question 1

Which of the following is incorrect?
◦ The constructors in an abstract class should be protected.
◦ You may declare a final abstract class.
◦ An abstract class contains constructors.
◦ The constructors in an abstract class are private.
◦ An interface may contain constructors.

Question 2

Show the output of running the class Test in the following code lines:

interface A {
}

class C {
}

class B extends D implements A {
}

public class Test {
public static void main(String[] args) {

B b = new B();

if (b instanceof A)

System.out.println("b is an instance of A");

if (b instanceof C)

System.out.println("b is an instance of C");

}
}

class D extends C {
}

◦ b is an instance of C.
◦ b is an instance of A followed by b is an instance of C.
◦ Nothing.
◦ b is an instance of A.

mistyjohnson · **Reply #1 on:** May 6, 2020

A FREE account is required to view all solutions!

Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.

Answer Preview

Only 50% of students answer this correctly