You are tasked with designing a database schema for a Student Learning Management System (LMS) that allows
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Question:
You are tasked with designing a database schema for a Student Learning Management System (LMS) that allows users to enroll in courses, access learning materials, submit assignments, and track their progress. The system will have the following requirements:
- Students can register accounts and log in to access the system.
- Courses are offered by instructors and can be enrolled in by students.
- Each course has multiple modules, each containing learning materials such as lectures, quizzes, and assignments.
- Students can submit assignments and view their grades.
- Instructors can create, edit, and delete courses and modules, as well as grade assignments submitted by students.
a) Database Design:
- Identify the entities and relationships relevant to the LMS domain. Describe how you would represent these entities using database tables, columns, and relationships.
- Design the database schema including tables for students, courses, modules, assignments, grades, instructors, and any other necessary entities. Specify primary keys, foreign keys, and any constraints.
- Discuss the normalization process and explain how you would apply normalization techniques to ensure the integrity and efficiency of the database schema.
b) User Authentication and Authorization:
- Outline the steps you would take to implement user authentication and authorization in the LMS database system. How would you securely store user passwords and authenticate users?
- Describe the role-based access control (RBAC) model you would use to manage user privileges within the LMS. What roles would you define for students, instructors, and administrators?
c) Functional Requirements:
- Write SQL queries to perform the following tasks:
- Retrieve a list of courses enrolled in by a specific student.
- Display the learning materials (lectures, quizzes, assignments) for a given module in a course.
- Calculate the average grade for assignments submitted by a student in a specific course.
- Discuss the indexes you would create to optimize the performance of the database queries in the LMS system.
d) Data Integrity and Security:
- Explain the measures you would implement to ensure data integrity within the LMS database system. How would you enforce constraints and validations to prevent data inconsistencies?
- Discuss the importance of data encryption and access control mechanisms in safeguarding sensitive information stored in the LMS database. How would you encrypt data at rest and in transit?
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An Introduction To Mechanical Engineering
ISBN: 9781111576820
3rd Edition
Authors: Jonathan Wickert, Kemper Lewis
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