What do you mean by data independence

Assignment Help Basic Computer Science

Reference no: EM1371205

Explain the answer, using references/sources cited appropriately.

1. What is meant by data independence? Explain your answer, paying attention to how data independence is implemented.
2. Identify two benefits of separating application software from the database management system. Provide an example when describing the benefits.

3. Design a relational database containing information about film directors, their basic biographical data, and their films. (Avoid redundancies similar to those in Figure 9.4)

4. Suppose a sequential file contains 50,000 records, and 5 milliseconds are required to interrogate an entry. How long should we expect to wait when retrieving a record from the middle of the file?

5. Explain one advantage (with an example) that

a. a sequential file has over an indexed file

b. a sequential file has over a hash file

c. an indexed file has over a sequential file

d. an indexed file has over a hash file

e. a hash file has over a sequential file

f. a hash file has over an indexed file

Reference no: EM1371205

Questions Cloud

Find alternative energy sources : What changes will happen their if cheap reliable alternative energy sources are discovered with future technology

Find the position at which a third charge placed : A major-league pitcher can throw a baseball in excess of 44.2m/s. If a ball is thrown horizontally at this speed, how much would it drop by the time it reaches the catcher who is 16.10 m away from the point of release.

Explain what is the maximum price the acquirer : Explain What is the maximum price the acquirer should be willing to pay and Does it appear that an acquisition is feasible and Why or why not?

Explanation of monopolistic competition : Industry structure is often measured through calculating the Four-Firm Concentration Ratio. Assume you've an industry with 20 firms and the CR is 30%. How would you describe this industry?

What do you mean by data independence : What do you mean by data independence? Explain your answer, paying attention to how data independence is implemented.

Relationship between customer satisfaction and loyalty : There is no relationship between customer satisfaction and loyalty - Pearson correlation

What is the horizontal distance from the press box to second : A 110kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 350N. For the first 15.00 m the floor is frictionless and for next 15 m the coefficient of friction is 0.30. What is the final speed of the crate.

Explain a written agreement and summit''s possession : Explain a written agreement and Summit's possession of the SUV and a written agreement or Summit's possession of the SUV.

Discuss on conflict and resolution : A houseowners son has agreed to invest some money in materials for remodeling of his parents kitchen, if he can decorate kitchen and the cabinets in vinyl he likes.

User Account

All Pages