Fichas
GCSE COMPUTING - Databases
Fichas del conjunto (20)
- 1What is a database?A database is a peristant organised store of related data on a computer systems.
- 2What is a serial file?When items are stored as a series on after the other.
- 3What is a sequential gearbox?A serial file in order, it can be a lot quicker to find something.
- 4What is a flat file database?A database consisting of only one table.
- 5In a database what is a field?A characteristic of something stored in a database.
- 6In a database what is a record?All the data about one item in a database.
- 7In a database what is an entity?Something that we store data about in a database.
- 8In a database what is an attribute?A characteristic of an entity. It becomes a field in a data table.
- 9What is data redundancy?The unnecessary repetition of data.
- 10What is data integrity?The state of the data being as it should be, reflecting reality.
- 11What is validation?The process of checking data as it is input to ensure that it is reasonable.
- 12What is verification?The process of checking that data is true or correct.
- 13What is a relational database?A relational database stores data in tables, each table contains data about just one entity.
- 14What is an entity relationship diagram?A diagram that shows how different entities used in a database are connected.
- 15What is a DBMS?A database management system is software that handles data directly and provides an interface to the applications.
- 16What are the ACID rules?Atomicity, Consistency, Isolation and Durability. These set of rules protect a database from errors during a transaction.
- 17What is a query?Queries are objects that extract data from a database. They are used to select the fields required and the conditions that need to be met.
- 18What is a form?On screen forms are usually provided for users so that the information needed is easy to see and modify.
- 19What is a report?The printed output of data from the database. The are usually based on the queries that have done the work of extracting and collating the fields required.
- 20What is a DNS?A domain name system translates domain names, which can be easily memorized by humans, to the numerical IP addresses needed for the purpose of computer services and devices worldwide. The Domain Name System is an essential component of the functionality of most Internet services because it is the Internet's primary directory service.
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- Fichas sobre GCSE COMPUTING - Databases, creado por Dan Needham el 19/01/2015.
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- Dan Needham
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