Information Security : The securing process of the confidential data in a system or an organization from the unauthorized users like hackers or attacker is known as information security. Top-down Approach: Top-down approach is the division of system into sub systems which are done to gain the information effectively. In this, every first level sub system will have more authority than its next level sub system. Though the top level system and bottom level sub systems are not connected directly but they will have the contact through the other middle level sub systems. Bottom-up Approach: Bottom-up approach is the centralization of sub systems to a single system in order to maintain the data potently. In this, every low level sub system will have more authority than it’s above level sub system. Both the bottom and top level sub systems are connected indirectly through the middle level subsystems.

Question

Write .php file that saves car booking and displays feedback. There are 2 buttons, which are <Book it> <Select a date>. <Select a date> button gets an input from the user, start date and an end date. Book it button can be pressed only if the start date and ending date are chosen by the user. If successful, it books cars for specific dates, with bookings saved. Booking should be in the .json file which contains all the bookings, and have the following information: Start Date. End Date. User Email. Car ID. If the car is already booked for the selected period, a failure message should be displayed, along with a button to return to the homepage. In the booking.json file, if the Car ID and start date and end date matches, it fails Use AJAX: Save bookings and display feedback without page refresh, using a custom modal (not alert).

Answer 1

Question

Chapter 1, Problem 11RQ

Program Plan Intro

Information Security:

The securing process of the confidential data in a system or an organization from the unauthorized users like hackers or attacker is known as information security.

Top-down Approach:

Top-down approach is the division of system into sub systems which are done to gain the information effectively.

In this, every first level sub system will have more authority than its next level sub system.

Though the top level system and bottom level sub systems are not connected directly but they will have the contact through the other middle level sub systems.

Bottom-up Approach:

Bottom-up approach is the centralization of sub systems to a single system in order to maintain the data potently.

In this, every low level sub system will have more authority than it’s above level sub system.

Both the bottom and top level sub systems are connected indirectly through the middle level subsystems.

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