Test your basic knowledge |

Database Fundamentals

Subject : it-skills
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. A structure that can store information about multiple types of entities - the attributes of these entities and the relationships among those entities






2. The field on which data are sorted






3. A statement the can be either true or false. Also called a condition






4. A combination of criteria in which at least on the criteria must be true






5. The combination of two or more rows in an operation - such as a join - or the combination of two or more columns for a primary key field to uniquely identify a given row in a table






6. An association between entities






7. The combination of two or more rows in an operation - such as a join - or the combination of two or more columns for a primary key field to uniquely identify a given row in a table






8. The prevention of unauthorized access to a database






9. More than one entry at a single location in a table






10. A file that relates key values to records that contain those key values






11. A structure that satisfies the properties required to be a relation with the exception of allowing repeating groups






12. A program or a collection of programs through which users interact with a database






13. The process of creating collections of records that share some common characteristics






14. The SQL command used to delete a table






15. A question the answer to which is found in the database






16. A structure that can store information about multiple types of entities - the attributes of these entities and the relationships among those entities






17. The part of an SQL SELECT command that indicates a sort order






18. Two simple criteria in a query the are combined with the AND or OR operators






19. A data manipulation language for relational databases in which users indicate the action to be taken by completing on-screen forms






20. A two-dimensional table-style collection of data in which all entries are single-valued - each column has a distinct name and all the values in a column are values of the attribute that is identified by the column name - and the order of the columns






21. The portion of the system catalog that contains table information






22. The property that no record can exist in the database with a value in a field other than a legal value






23. Two simple criteria in a query the are combined with the AND or OR operators






24. When comparing tables the set of all rows that are in the first table but that are not in the second table






25. A file used to store data about a single entity. Such a file can be thought of as a table.






26. A person or place or object or event or idea for which you want to store and process data






27. A relational data manipulation language in which new tables are created from existing tables through the use of a set of operations






28. The process of determining the content and structure of data in a database in order to support some activity on behalf of a user or group of users






29. The query that is used to define the structure of a viewk






30. When comparing tables an intersection is a new table containing all rows that are in both original tables






31. The process of arranging rows in a table or results of a query in a particular order






32. A delete option in which related records are automatically deleted






33. An association between entities






34. A condition that involves only a single field and a single value






35. Combination of criteria in which both criteria must be true






36. A graphic model for database design in which entities are represented as rectangles and relationships are represented as either arrows or diamonds connected to the entities they relate






37. A data value meaning "unknown" or "not applicable"






38. A minimal collection of columns (attributes) in a table on which all columns are functionally dependent and that is chosen as the main direct-access vehicle to individual rows.






39. The portion of the system catalog the contains column information






40. A relational data manipulation language in which new tables are created from existing tables through the use of a set of operations






41. The relational algebra command to select rows from a table






42. The relational algebra command for performing the intersection of two tables






43. An index built on more than one field






44. The table obtained by concatenating every row in the first table with every row in the second table






45. The form of a join in which all records appear - even if they don't match






46. The property that lets you change the structure of a database without requiring you to change the programs that access the database






47. Additional information required by an action in a data macro to complete the action






48. The process of creating collections of records that share some common characteristics






49. An application program's or an individual user's picture of a database






50. The individual who is responsible for a database or the head of database administration