19. What is an indexPath?
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A: Explain the technics that are used in data modeling in designing a system. Data modeling is the…
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Q: When and why do ict's benefits and drawbacks become apparent to the public?
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A: We meed to discuss the developments in wireless security during 3 decades.
19. What is an indexPath?
20. What are the properties of an idexpath object?
21. How does a table cell reusability concept work?
22. What is NSFIleManager What does insertNewObjectForEntity:
inMagedObjectCntext; do?
23. What is NSUserDefaults?
24. Different between Core Data and Sqlite
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- Consider a database with the following tables: Patient(PatientID. PatientName, NumberOfVisits) / Doctor(DoctorID. DoctorName) Appointment(AppID. DoctoriD, PatientID. Date, time) 1.Write SQL statement to execute the view AppointmentsViewDescribe the concept of "lazy loading" in the context of database connectivity.In database refactoring, the greater the coupling, the harder it is to refactor. True False
- Defineanomaly? A database that has three mistakes in it? Are you going to figure out what's wrong and come up with a solution?The aim of assignment 1 is to implement a database schema and execute different types of SQL queries in Oracle SQL developer. Given the following relational schema: Student (studid, FirstName, LastName, Email, phoneNumber, DateofBirth, GPA) Club (clubid, ClubName, #studid) MemberOf (#clubid, #studid, joiningDate ) Activities (actid, actdt, place, durationNbHour) Organize (#actid , #clubid , fee) 1. Write SQL queries to create the following tables according to the below descriptions. Table name: Student studid |Char(9) Primary key FirstName Varchar2(50) NOT NULL LastName Varchar2(50) NOT NULL Email Varchar2(50) NOT NULL, UNIQUE phoneNumber Number(8) NOT NULL, UNIQUE DateofBirth Date NOT NULL GPA Number(1,2) NOT NULL Table name: Club clubID Number(3) Primary key ClubName Varchar2(20)NOT NULL NULL, UNIQUE, NOT Foreign key studid Char(9) Table Name: MemberOf ClubID Number(3) Primary Key, Foreign Key Studid Char(9) Primary Key, Foreign Key joiningDate Date Table Name: Activities Actid…8. Matrix algebra is a theoretical way of manipulating a database. 9. The union of tables A and B is a table containing all rows that are in either table A or table B or in both table A and table B. 10. The intersection of two tables A and B is the set of all rows that are in table A but that are not in table B.
- Using MySQL Workbench, Create a database named “bank” with the following tables: Customer with filds: customer_id (integer) name (string) Account with fields: account_id (integer) balance (float) type (one of ‘savings’, ‘checking’, ‘cd’) Customer_Account id (integer) cust_id (integer) acc_id (integer) Populate the database with data of your choice. Note 1: Export the database into a self-contained file named bank1.sql before you continue. Note 2: Using Apache NetBeans, create a Java project that connects to the bank database.Task 1: The InstantRide Management team founded a new team for car maintenance. The new team is responsible for the small maintenance operations for the cars in the InstantRide system. The main idea is to take actions faster and minimize the time spent for the maintenance. Therefore, the Car Maintenance team wants to store MAINTENACE_TYPE_ID (char(5)) and a MAINTENANCE_TYPE_DESCRIPTION (varchar(30)) in the database. Using MAINTENANCE_TYPE_ID as the PRIMARY KEY, create a new table, MAINTENANCE_TYPES, and send the table description with the column names and types to the Car Maintenance team. Task 2: The Car Maintenance team also wants to store the actual maintenance operations in the database. The team wants to start with a table to store CAR_ID (CHAR(5)), MAINTENANCE_TYPE_ID (CHAR(5)) and MAINTENANCE_DUE (DATE) date for the operation. Create a new table named MAINTENANCES. The PRIMARY_KEY should be the combination of the three fields. The CAR_ID and MAINTENACNE_TYPE_ID should be foreign…Which of the following are true about primary keys? SELECT ALL THAT APPLY. A) They must reference one or more columns in a single table. B) They are usually implemented using an index. C) They guarantee that no two rows in a table have duplicate primary key values. D) They must be defined for every database table.
- What is the Virtual Key Symbol of NumLock?Task 1: The InstantRide Management team founded a new team for car maintenance. The new team is responsible for the small maintenance operations for the cars in the InstantRide system. The main idea is to take actions faster and minimize the time spent for the maintenance. Therefore, the Car Maintenance team wants to store MAINTENACE_TYPE_ID (char(5)) and a MAINTENANCE_TYPE_DESCRIPTION (varchar(30)) in the database. Using MAINTENANCE_TYPE_ID as the PRIMARY KEY, create a new table, MAINTENANCE_TYPES, and send the table description with the column names and types to the Car Maintenance team.Task 1:The InstantRide Management team founded a new team for car maintenance. The new team is responsible for the small maintenance operations for the cars in the InstantRide system. The main idea is to take actions faster and minimize the time spent for the maintenance. Therefore, the Car Maintenance team wants to store MAINTENACE_TYPE_ID (char(5)) and a MAINTENANCE_TYPE_DESCRIPTION (varchar(30)) in the database. Using MAINTENANCE_TYPE_ID as the PRIMARY KEY, create a new table, MAINTENANCE_TYPES, and send the table description with the column names and types to the Car Maintenance team. THIS IS FOR CENGAGE MYSQL