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






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






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






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






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






6. 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






7. 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.






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






9. An instruction by a user that directs a database to perform a certain way






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






11. The SQL clause that is used to enforce legal-values integrity






12. A view that consists of a subset of the rows and columns in a table






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






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






15. The individual or group that is responsible for a database






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






17. The individual or group that is responsible for a database






18. The plural of Criterion






19. The prevention of unauthorized access to a database






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






21. The SQL command used to delete a table






22. 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






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






24. To indicate the table (relation) of which a given column (attribute) is a part by preceding the column name with the table name.






25. The part of an SQL SELECT command that restricts the groups to be displayed






26. The field or fields on which an index is built






27. An association between entities






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






29. 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






30. A query in SQL that appears within another






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






32. In relational algebra the operation in which two tables are connected on the basis of common data.






33. The portion of the system catalog that contains view information






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






35. 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






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






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






38. A characteristic or property of an entity






39. A Characteristic or property of an entity






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






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






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






43. A computer that provides services to the clients in a client/server system






44. Duplication of data or the storing of the same data in more than one place.






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






46. The prevention of unauthorized access to a database






47. 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






48. The SQL command that drops (deletes) a table from a database






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






50. The most common form of a join