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 combination of two tables consisting of all records that are in either table






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






3. An index built on a single field






4. The SQL command used to add new data to a table






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






6. 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






7. What type of an operator is >= ?






8. 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.






9. The SQL command that drops (deletes) and index from a table






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






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






12. Two tables are union compatible if they have the same number of fields and if their corresponding fields have identical data types






13. The most common form of a join






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






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






16. A screen object you use to maintain or view and print data from a database






17. The SQL command that is used to change the structure of a table






18. A collection of relations






19. The clause in a SQL CREATE TABLE or ALTER TABLE command that specifies referential integrity






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






21. An update option in which related records are automatically updated






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






23. A relationship between two entities in which each occurrence of the first entity is related to many occurrences of the second entity and each occurrence of the second entity is related to or at most one occurrence of the first entity






24. In Access the query that updates the contents of a table






25. An index built on a single field






26. A source of data - usually stored in hidden database tables - about the types of entities or attributes and relationships in a database






27. An access tool that provides documentation about the objects in a database






28. When sorting on two fields - the less important field






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






30. A rule that must be followed by data in a database






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






32. A field whose value is computed from other fields in the database






33. The field on which data are sorted






34. 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






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






36. A characteristic or property of an entity






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






38. The relational algebra command used to select columns from a table






39. A function used to calculate the number of entries and the sum or average of all the entries in a given column or the largest or smallest of the entries in a given column






40. An association between entities






41. A collection of actions in Access that are performed in response to an associated database operation - such as inserting or updating or deleting records.






42. 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






43. A rule that must be followed by data in a database






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






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






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






47. When sorting on two fields this is the more important field






48. 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






49. The prevention of unauthorized access to a database






50. The SQL command used to delete a table