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DB Chapter 1

CompTia Dababase Design & MySQL Lesson 7

QuestionAnswer
Why is storing data in a central repository advantageous? The data is much easier to manage and manipulate.
Why does the separation of the database systems and the programs that access them make an application programmer's job easier? The programmer no longer needs to be concerned with how the database is defined or how it holds the data
Which of the following can a database designer use to specify constraints on data? Data Definition Language (DDL)
Which of the following produced important information concerning database optimization The Peterlee Relational Test Vehicle
The development of commercial DBMS products, including IBM's DB2 and Oracle's SQL/DS, grew out of which of the following projects? SQL
Who first proposed the relational data model in a paper titled "A Relational Model of Data for Large Shared Data Banks?" E.F. Codd
Why is program-data independence advantageous? New data structures can be added to the database without the need to modify the application programs that access the data.
In a file-based database, what is the difficulty caused by holding data in separate, disparate files? The process of accessing and synchronizing multiple files becomes more complex as the number of files that need to be accessed grows
Which of the following databases is a file containing records that have no structured interrelationship? Flat-file database
Because businesses rely on their database systems for mission-critical information, the data within the database should be organized in a manner that permits easy data retrieval.
As regards a database management system (DBMS), what is managed concurrency? A system that controls how multiple users can access data at the same time
Created by: adawa
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