h. T 9) In a diagram, crows feet notation conveys more information about the relationships. i. T 10) A primary key uniquely identifies each row in a database table. j. F 11) In a relational database, all data is kept in tables, even the information about the tables. k. T 12) SQL is the language used by relational databases to create objects and to manipulate and retrieve data. l. T 13) An entity is someone who is interested in the database.
What is OLTP (Online Transaction Processing)? In OLTP - online transaction processing systems relational database design use the discipline of data modeling and generally follow the Codd rules of data normalization in order to ensure absolute data integrity. Using these rules complex information is broken down into its most simple structures (a table) where all of the individual atomic level elements
Then construct the matrix. There are various way of doing this, use a spreadsheet if you are computer-literate. Possibly better is to use sheets of A4 paper. Lay these out, on the floor, in the form of a table. You will need one column for each theme already identified.
a. autounattend.xml b. auto.xml c. auto.txt d. automatic.xml 3. What is the program you should use to create or validate an answer file used to install Windows? a. IAS b. Server Core c. SIM d. WDS 4. What is the maximum amount of memory that
Logical models show not only what a system is or does, but also how the system is implemented. Answer: False Page: 316 LOD: Medium Rationale: Physical models show not only what a system is or does, but also how the system is implemented; therefore, they are implementation dependent. Logical models are implementation independent. 6. Process modeling is a technique for organizing and documenting the structure and flow of data through a system's processes and /or the logic, policies and procedures to be implemented by a system's processes.
| A data dictionary is a language associated with a database management system that end users and programmers use to manipulate data in the database. Answer: False Difficulty: Easy Reference: pp. 233–234 | 9. | In a relational database, complex groupings of data must be streamlined to eliminate awkward many-to-many relationships. Answer: True Difficulty: Easy Reference: p. 236 | 10.
Which of the following is true about the process of read data, as described in the chapter? a. The CPU tells the RAM which address holds the data that the CPU wants to read. 6. A user has opened a word processor, typed the numbers 123456789, and stored the document as a file called report1.
Assignment 3: Databases Professor David Moore Course Title: CIS 106: Introduction to Technology 28 May 2014 Assignment 3: Databases A relational database is a compilation of data items arranged as a group of tables from which data can be evaluated or reconstructed without needing to rearrange the database tables. A database is comprised of one or more tables of data. The rows in a table are called records, and the columns in a table are called fields or attributes. A database that holds one table is called a flat database, and a database that is comprised of two or more related tables is called a relational database. The Historical Data Warehouse design permits successive automatic transformations to obtain one of the implementations of the model in a Relational Data Base Management System [RDBMS] (Neil, De Vincenzi, and Pons, 2014).
What happens when you give the following commands if the file named done already exists? $ cp to_do done $ mv to_do done Either command overwrites done with the contents of to_do 4. How can you display the following line on the screen you are working on? Hi $2, I’m number * (guess)! $ "Hi #2, I'm number * (guess)!"
Answer: True Page: 518 LOD: Easy 3. An historical advantage of using conventional files has been processing speed. They can be optimized for the access of the application. Answer: True Page: 519 LOD: Easy 4. Duplication of data items in multiple files is normally cited as the principal disadvantage of file-based systems.