Suppose that class B is derived from class A. Then we can say: B "is a " A A "is a " B Not enough information to answer
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Suppose that class B is derived from class A. Then we can say:
B "is a " A
A "is a " B
Not enough information to answer
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- Question 2: Suppose you have the following scenario: People who use the Palm Tree System are either farmers or experts. They both have name and phone number. The farmer has address and has the ability to search and buy a product, reserve an appointment and add comments. An expert has a number of years of experience and can answer questions and post advices. An Expert can communicate with many farmers while a farmer can communicated by only one expert. By using Star UML tool, draw a Class diagram for this scenario.Q. There is an island that has two kinds of inhabitants, knights, who always tellthe truth, and their opposites, knaves, who always lie. It is assumed that every inhabitant of theisland is either a knight or a knave. Below there are 3 inhabitants, who are denoted by A, B andC.A. What are A, B and C if A says “If B is a knave then C is a knave”, and B says “If Cis a knight then A is a knave”? Briefly explain your reasoning.B. What are A,B and C if A says “B is a knight and C is a knight”, and B says “A is aknight if and only if C is a knave”? Briefly explain your reasoning.Let P(x) = "x passed the class". Let S(x) = "x studied". Let L(x) = "x got lucky". Which statement below means "Everyone who passed the class either studied or got lucky"? OVx ((P(x)→ S(x)) V L(x)) None of the other answer here listed is correct. OVx( P(x)→ S(x)) V L(x) OVx ((S(x) V L(x)) → P(x)) OV (P(x) → (S(x) v L(x)) ) OV (L(x) V (P(x) → S(x)))
- Correct answer will be upvoted else downvoted. Computer science. Michael is blamed for disregarding the social removing rules and making a danger of spreading Covid. He is currently shipped off jail. Fortunately, Michael knows precisely what the jail resembles from within, particularly since it's actual straightforward. The jail can be addressed as a square shape a×b which is separated into stomach muscle cells, each addressing a jail cell, normal sides being the dividers among cells, and sides on the border being the dividers prompting opportunity. Prior to condemning, Michael can ask his companions among the jail representatives to make (all around stowed away) openings in a portion of the dividers (counting dividers among cells and the furthest dividers). Michael needs to have the option to escape the jail after this, regardless of which cell he is set in. Be that as it may, he likewise needs to break as couple of dividers as could be expected. Your assignment is to…Let l(x) be "x has an internet conection" and C(x, y) be "x and y have chatted over the internet". Assume the domain is all students in a class. Express the following using quantifiers. 1. Jerry does not have an internet connection 2. Exactly one student in the class has an internet connection 3. Someone in your class has an internet connection but has not chatted with anyone else in the class.Suppose class B is derived from class A, and class C is derived from class B. In other words, we have: public class A [.) public class B extends A (..) public class C extends B..) Which of the following is legal? O Bp- new C): OCp- new A0: OCp- new Object(): Cp- new BO: O Bp- new A):
- Consider a class MotorBoat that represents motorboats. A motorboat hasattributes for• The capacity of the fuel tank• The amount of fuel in the tank• The maximum speed of the boat• The current speed of the boat• The efficiency of the boat’s motor• The distance traveledThe class has methods to• Change the speed of the boat• Operate the boat for an amount of time at the current speed• Refuel the boat with some amount of fuel• Return the amount of fuel in the tank• Return the distance traveled so farIf the boat has efficiency e, the amount of fuel used when travelingat a speed s for time t is e × s2 × t. The distance traveled in that timeis s × t.a. Write a method heading for each method.b. Write preconditions and postconditions for each method.c. Write some Java statements that test the class.d. Implement the class.... 5. Extend the Rectangle class by adding and implementing the special operator methods for the six relational operations (=, !-, , >=). The relational operators should logically compare the positions of two rectangles on the canvas by comparing the corresponding x- and y-coordinates. For example, the less than operator should determine whether the x- and y-coordinates of one rectangle are less than the x- and y-coordinates of a second rectangle. rectangle.py 1 class Rectangle : 2 #323 # Initializes a Rectangle object. # @param x the x-coordinate for the upper-left corner of the rectangle # @param y the y-coordinate for the upper-left corner of the rectangle # éparam width the width of the rectangle # éparam height the height of the rectangle 3 4 5 6 8 9 10 11 12 13 _init_(self, x, y, width, height): self._x = x self. y = y self. width = width self._height = height def 14 def lt (self, rhs): 15 16 17 18 19 20 ... # Include the new special operator methods here. 212 class lineType Instructions 3 { 4 public: The equation of a line in standard form is ax void setline (double a = 0, double b = 0, doublec = e); + by = c, wherein both a and b //Function to set the line. 7 8 void equation() const; cannot be zero, and 9 a, b, and c are double getXCoefficient() const; 10 real numbers. If b#0, double getYCoefficient() const; 11 then -a/b is the slope double getconstantTerm() const; 12 13 of the line. If a = 0, 14 void setXCoefficient (double coeff); then it is a horizontal 15 void setYCoefficient(double coeff); line, and if b = 0, then 16 void setConstantTerm(double c); it is a vertical line. The 17 slope of a vertical line double slope() const; 18 is undefined. Two lines are parallel if 19 //Return the slope. This function does not check if the 20 //line is vartical. Because the slope of a they have the same vertical line slope or both are //is undefined, before calling this function 21 vertical lines. Two check if the lines are 22 //line is nonvertial.…
- Write a JAVA program to model the kinds of people one finds in a university. The categories are students, teachers and teaching assistant (TAs). All these categories are kinds of Person (Person is abstract class. A teaching assistant (TA) is a student and a teacher as well. A person has a name (string). A student has grade point average GPA (between 0 to 4), the teacher has the number of scholarly papers he/she has published and the teacher assistant has the number of courses he/she assists. All the classes contain constructors with default arguments to fill all data spaces. Provide display method to print all data members of an object on the screen. Classes also contain a function called isSuccessful(). Students with a GPA over 3.5 are considered successful. This function returns true if someone is successful or false if not. In main(), define an array of Person class, which can point to students, teachers and teacher assistants. The program first asks the kind of person and then lets…Use an OUTSIDE CLASS DEFINITION in solving this problem.Conway's Game of Life: This is a zero person game with the following rules: (see Wikipedia for example) Any live cell with fewer than two live neighbours dies, as if by underpopulation. Any live cell with two or three live neighbours lives on to the next generation. Any live cell with more than three live neighbours dies, as if by overpopulation. Any dead cell with exactly three live neighbours becomes a live cell, as if by reproduction. Remember the oscillator or blinker of 3 cells. You can also find this blinker on Wikipedia. 1 21 1 2 1 21 3. 4 6 4. 6. 4 8. 9 8 9 #1 #2. #3 5. Consider now these 3 creatures at stage 1: Show how they look like in the next two stages: stage 2 and stage 3. Explain how you get the answers Creature 1 Creature 2 Creature 3 (here creature 1 is the blinker of 3 cells, horizontally; creature 2 consists of two adjacent cells, creature 3 consists of 4 adjacent cells horiztonally) ww (d) Creature 1 (10%), (e) Creature 2 (8%), (f) Creature 3 (20%)