3. R is a binary relation over N, the set of natural integers. (x, y) € R iff x mod 7 = y mod 7. R defined this way is an RST relation. List all equivalence classes of R in the following box. For each equivalence class, list all the elements in that class.
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- O True O False 6. Every aggregation relationship is an association * O True O False 7. Removing a duplicate code in the program is an example for * (1 Point) Reverse engineeringWrite a C program that would: - Let the users accept a relation. - Input options should be in Matrix and Listed Method. - Display the relation through a matrix or listed method. - Let the user select "Display Properties of Relation"- This will print out the properties of the relation which include Symmetric, Asymmetric, Antisymmetric, Transitive and Reflexive. ##### Listed Display ##### R = {(1,1),(1,3),(2,2),(2,4),(3,1),(3,3),(4,2),(4,4)} ##### Display Properties of Relation ###### - Reflexive - Symmetric - Transitive> Create UML Class diagram for e-library system as described, make sure to show attributes, generalization where appropriate. operations, multiplicities, and aggregations/compositions, A library system has materials which would be books, journals, or CDs. All library material (books, magazines, and CD) has a unique identification number and a title. Books have one or more authors, journals have producer, while CDs have entertainer. all library materials can be loaned to users, users have user-id, user-name, birthdate (day, month, and year), age and phone-number. Users can loan any material, for each loan the library records material-id, the user-id, loan-date (day, month, and year), and loan time (hour, minute), and loan counter (shared)
- How is the relation of class A and class B best described from the code snippet below? public class A {private B b = new B();public A() {}} Group of answer choices Aggregation Inheritance Composition DelegationQuantifiers are called quantifiers because they express somethingabout the number of elements that satisfy a certain property. Showhow to express the following ‘quantified’ statements in predicatelogic with a unary relation symbol R. You don’t have to introduceany new quantifiers to do this, although you will need to keep inmind that the atomic formula x=yis always considered to be partof the language.(a) Exactly one x satisfies R(x).(b) At least one x satisfies R(x). (c) No more than three x satisfy R(x).(d) All but one x satisfy R(x).QUESTION 1 Happy Learning (this is a fictional scenario) A private kindergarten, Happy Learning, wants to build a database to manage their operations. You were assigned to create an initial design based on the following customer description of their operations. There are 3 age levels in the kindergarten (turtles, foxes and monkeys). At each level there 3 classes (red, blue and green). For a class we keep a code based on the initial of group color and level (e.g. RT for red turtles, GF for green foxes). Each class has a room number and a phone number (with the format (999) 9999999). Also, each class has a maximum capacity (between 25 and 35). For some classes we will keep brief directions to the class location in the building (less than 160 characters). For a student we will keep the name (first, last, middle each less than 15 characters), any nickname (less than 10 characters), date of birth, address, and the class in which the student is currently enrolled. We will process…
- Airline Company An airline company is interested in implementing a database system to manipulate the flights thatit organizes.The airline company has a certain number of airplanes. Each airplane has a unique code, anumber of seats and a production year. An airplane belongs to a certain airplane model. Eachmodel has a unique model number and is provided by a certain company. We have differentairplanes of each model. Each flight is identified by a flight number, a scheduled departure timeand a scheduled arrival time. We want also to keep track of the airport from which the flight isscheduled as well as the destination airport. Each airport is identified by a unique code, its nameand the country in which it is located. Journeys of each flight are organized on a daily basis.Each journey is identified by a date, its actual departure time, its actual arrival time, and thenumber of passengers, in addition to the airplane that performs the journey. We want to keeptrack of the seats occupied,…State the use of static members using with example.PLEASE TYPE ONLY IF NOT TYPE THAN DO NOT DO IT*** PLEASE DO ALL THREE QUESTIONS B, C, D*** Exercise 8.4.5: Composition and relation properties.For the following statements, provide a proof if the statement is true or give a counterexample if the statement is false. S and R are binary relations over the same domain. (b) If S is reflexive, then S∘S is reflexive. (c) If S and R are both anti-reflexive, then S∘R is anti-reflexive. (d) If S is anti-reflexive, then S∘S is anti-reflexive.
- Code the hierarchy shown above adding appropriate attributes/member functions/member variables and extent the hierarchy from the Student class. Use Student as the base class of the hierarchy, then include classes UndergraduateStudent and GraduateStudent that derive from Student. Continue to extend the hierarchy as deep (i.e., as many levels) as possible. For example, Freshman, Sophomore, Junior and Senior might derive from UndergraduateStudent, and DoctoralStudent and MastersStudent might derive from GraduateStudent. After drawing the hierarchy, create an object of each class in the main function and call at least one function inherited in it. Do not use strings. User char pointers instead. Provide all type of constructors (including copy constructors), destructor, display() and setter/getter for each class, whether it is mentioned or not. Make a menu driven code.09. --the following NFA, following the subset construction, construct an equivalentDFA, and draw the DFA state diagram.?In your own words, describe the is-a and has-a relationships. Give an example