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Implement a program to query and update the text database for a library using a client/server model allowing multiple clients safe access to the database, and using a producer-consumer model to control the inventory of each item.
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?
Explain how you could delete the IT department without deleting all the employees who work for that department.
The Enhanced Entity Relationship Diagram (EERD) produced with a drawing or case tool. Your EERD must use a 'standard' notation style such as Crows Foot or Chen.
Explain the idea for the database along with the thoughts for partitioned view. How would you utilize this partitioned view?
Create ERD containing Order and Customer entity types connected by 1-M relationship from Customer to Order. Select suiatble relationship name using your common knowledge of intersection.
Create a table (by your own imagination) which comprises the least 25 patients with next information (columns): Calculate average of Value1 for each Gender.
Describe the features of a Database Management System (DBMS) and its use within an organization.
What is meant by cardinality of a relationship? Your answer requires to be thorough and specific. Be sure to include the two types of cardinality
Compute the closure sets of R - find all non-trivial dependencies and what are the candidate keys of R?
Evaluate the success WellCo and PharmaCARE shareholders
Define main key and foreign key. Represent graphically the relational data base, with its tables and connections of foreign keys. Follow this rule: 1:N connections is represented table with just one line above and table with multiple lines below.
Explain how much the modulating signal power is required to generate 100 percent modulation? What is the approximate center frequency of filter required to pass the lower sideband?
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