Home>IT Tests>Questions>In this code, the class B extends the class A. The class B overrides the method talk() from the class A. The object b is an instance of the class B. The object a is an instance of the class A. The object a is assigned to the object b. The object a calls the method talk(). The method talk() from the class B is called.
Question from the Object-oriented programming - Fundamentals test
In this code, the class B extends the class A. The class B overrides the method talk() from the class A. The object b is an instance of the class B. The object a is an instance of the class A. The object a is assigned to the object b. The object a calls the method talk(). The method talk() from the class B is called.
Medium
What does the following code :
public class A {
public void talk() {
echo "Hello my name is A"
}
}
public class B extends A {
public void talk() {
echo "Hello my name is B"
}
}
B b = new B();
A a = b;
a.talk();
Author: SamuelStatus: PublishedQuestion passed 442 times
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Auteur anonyme
12/01/2023
"B b = new B():" the end of the line is not ":", it must end with ";".
Answer is wrong, The output is B.
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What does the following code return ?
public class A {
public void talk() {
echo "I am A"
}
public secretTalk() {
this.talk()
}
}
public class B extends A {
private void talk() {
echo "I am B"
}
public secretTalk() {
this.talk()
}
}
A b = new B()
b.talk()
b.secretTalk()
Answer : "I am A" "I am B"