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

The cost of memory technologies varies significantly based on speed and purpose. DRAM is used for volatile, fast-access main memory, while disk storage (such as SSDs or HDDs) is used for persistent, long-term storage.Based on current market estimates, which of the following correctly compares the cost of DRAM and disk storage per gigabyte (Gb)?

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

In some database management systems, free space metadata is stored in dedicated pages rather than alongside data within the same page. These dedicated pages track the amount of free space available in each data page across the entire database.What is a primary benefit of using dedicated free space metadata pages in a database management system?

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 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?

Consider the behavior of variables in statically typed languages like C++ compared to dynamically typed languages like Python. Which of the following statements correctly reflects a fundamental difference between static and dynamic typing?

Consider the following C++ code snippet where a slotted page is updated by deleting tuples and then the changes are written back to disk. The page is then reloaded to verify the updates:   std::cout deleteTuple(0); loadedPage->deleteTuple(7); loadedPage->write(filename); // Deserialize again from disk — page is updated this time auto loadedPage2 = SlottedPage::deserialize(filename); loadedPage2->print();   What does this process demonstrate about data synchronization in the context of slotted pages?

Consider a serialization process where the metadata about the number of tuples is written after all tuple data instead of at the beginning. What would be the likely impact of this change on the deserialization process?

In the context of serialization in a Page class, what role do smart pointers play in the process?