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. The relational algebra command that combines tables and searches for rows in the first table that match all rows in the second table






2. An index built on more than one field






3. 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






4. The relational algebra command for performing the difference of two tables






5. 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






6. A collection of relations






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






8. A Characteristic or property of an entity






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






10. The SQL command used to make changes to existing table data






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






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






13. The rule that if table A contains a foreign key that matches the primary key of table B then the value of this foreign key must either match the value of the primary key for some row in table B or be null






14. 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






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






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






17. A file containing a collection of compiled and optimized SQL statements that are available for future use






18. An access query that creates a table using the results of a query






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






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






21. The prevention of unauthorized access to a database






22. The most common form of a join






23. A characteristic or property of an entity






24. A characteristic or property of an entity






25. A collection of relations






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






27. The SQL command used to describe the layout of a table. The word table is followed by the name of the table to be created and then by the names and data types of the column (fields) that comprise the table






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






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






30. A query that deletes all records that satisfy some criterion






31. A characteristic or property of an entity






32. A message in Access that is displayed when a validation rule is violated






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






34. What type of an operator is >= ?






35. An association between entities






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






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






38. 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






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






40. The most common form of a join






41. 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






42. The part of an SQL SELECT command that indicates grouping






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






44. 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






45. The prevention of unauthorized access to a database






46. 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






47. An action that automatically occurs in response to an associated database operation such as INSERT or UPDATE or DELETE






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






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






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