Consider the scenario where a database designer is structuring a relational database for a university. The database includes two tables: Students and Enrollments. The Students table has a primary key StudentID, and the Enrollments table lists the courses students are enrolled in, with CourseID and StudentID as its columns. The designer plans to enforce referential integrity between these tables.Which of the following implementations correctly utilizes primary and foreign key constraints to maintain database integrity and why?

Consider the following C++ class definition:class Account {private: double balance;public: Account(double initialBalance) : balance(initialBalance) {} void deposit(double amount) { if (amount > 0) { balance += amount; } } bool withdraw(double amount) { if (amount > 0 && amount

Analyzing the use of smart pointers to prevent dangling pointers, consider this modification to a typical scenario:   #include void useResource(std::unique_ptr& ptr) { std::cout

Review the following C++ class structure:class Employee {private: std::string name; int age;protected: double salary;public: Employee(const std::string& empName, int empAge, double empSalary) : name(empName), age(empAge), salary(empSalary) {} void displayInfo() const { std::cout

Given two concurrent transactions modifying the same data, what issue might arise without proper isolation?

What is the primary benefit of using slots in the slotted page structure?

Consider the serialization of a Person object with the name “John” and age 30 using both text and binary serialization methods. The text serialization outputs a human-readable string, whereas binary serialization writes the data in a format close to its memory representation.   void serializePersonText(std::ofstream& out, const Person& person) { out

Consider a C++ class Document which holds a text content using a std::string (which internally utilizes pointers to manage its data) and an integer representing the document length. The class is represented in-memory with pointers facilitating dynamic memory management, while it is serialized to disk without using pointers.Here’s an outline of the class and its serialization method:class Document {public: std::string text; int length; void serialize(std::ofstream& out) { length = text.length(); out.write(reinterpret_cast(&length), sizeof(length)); out.write(text.c_str(), text.length()); }};Which statement best captures the distinction between the in-memory and on-disk representations of the Document object regarding pointer usage?

Given the described flat-file database system with separate files for Users, Posts, and Interactions, which of the following best exemplifies the normalization benefit when transitioning to a relational database?

Consider a transaction designed to transfer funds between two accounts. What does the atomicity property guarantee in this transaction?