Questions 2 – 4 refer to the following classes:
public class Thing {
private int value;

public Thing() {
value = (int)(Math. random () * 100);
}

public String toString() {
return "" + value;
}

// other methods not shown
}
public class Cog extends Thing {
private int num;

public Cog () {
num = (int)(Math. random () * 100);
}

public String toString() {
return "" + num;
}
}

Consider the following declaration:
public class Gear extends Cog
Which of the following is true?

Gear cannot extend Cog since classes can only inherit from one class.
Gear can access all variables in both Cog and Thing.
Gear cannot access any methods in Thing.
Gear's constructor calls the constructor in Cog and Thing.
Gear's constructor calls the constructor in Cog, which calls the constructor in Thing.

Which of the following is NOT true?

Cog cannot directly access the variable value in Thing.
Cog can call the constructor in Thing directly using the super keyword.
The constructor in Cog automatically calls the constructor in Thing.
Cog can call the toString method in Thing.
Thing can call the toString method in Cog.