Need answers for 11& 12. due today.

What is CAD?

Computer-aided design (CAD) is the use of computer programs or computer systems that aim to create, modify, analyze, optimize and document two or three-dimensional (that is 2D or 3D) graphical representations of physical objects as an alternative to manual drafts and product prototypes. It is widely used in electrical, mechanical, chemical engineering, among others. For example, it is used in electrical engineering to make electrical drawings regarding different projects such as Residential Projects, industrial projects, etc.

What are some of its advantages over other design systems?

CAD is widely used to increase the productivity of the designer as well as improve the quality of design, improve communications through documentation, and to create a database for manufacturing. 
It is used throughout the engineering process. From conceptual product design and layout through assembly analysis to manufacturing method definition. The method  CAD enables and ensures engineers to interactively test design variants with minimal physical prototypes to achieve: 

1. Lower product development costs
2. Greater speed
3. Increased productivity
4. Quality assurance 
5. Accelerated time-to-market

In this technological age, costs, productivity, speed, quality and time are topics very important to companies. These topics are optimized using CAD. Manual drafts and product prototypes translate into a poor productivity nowadays.

What is the difference between servicing and repair?

There are a lot of products that are designed to be fully serviceable and repairable. These products (such as a watch, smartphone, car, etc) are subjected to a wide variety of daily stresses and strains. When a part of the product needs replacing, this is a timely opportunity to ensure that any progressive wear and tear from external elements are addressed. By carefully assessing each product, checking its parts, addressing any worn parts or gaskets, ensures that the product is in perfect working order and that it always functions efficiently. This is related to service.
On the other hand,  if the product has been accidentally damaged, suffered a fault, then it is necessary to repair the product. This is related to repair
So, the difference between servicing and repair is that the first one is related to maintenance and the second one involves fixing things when the product is damaged.

Why are both important in technological products?

Creating the most popular product of the year will make consumers and investors happy. Many of the best-selling products were first in a new category. The purpose of the products is to continue to dominate their markets. So, it is important that they be easy for maintenance and hard to be damaged.

Should how data two it file to creates table ti yes

Database uses the approach of programming while both the data and the processing instructions are stored in the database.