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 column (attribute) or collection of columns in a table whose value is required either to match the value of a primary key in a table or to be null






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






3. A characteristic or property of an entity






4. A characteristic or property of an entity






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






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






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






8. 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






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






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






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






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






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






14. A rule in Access that data entered in a field must satisfy






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






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






17. A Characteristic or property of an entity






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






19. The column on which two tables are joined






20. 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






21. The most common form of a join






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






23. The field on which data are sorted






24. 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






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






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






27. 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






28. The plural of Criterion






29. 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






30. A punctuation mark - such as a semicolon - that separates pieces of data






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






32. A database has integrity if the data in it satisfies all established integrity constraints






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






34. The rule that no column (attribute) that is part of the primary key may accept null values






35. 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






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






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






38. The portion of the Query Design window in Access where you enter fields or criteria or sort orders and so on






39. In an Access query the line drawn between tables to indicate how they are related






40. The SQL statement that is used to revoke privileges from users of a database






41. 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






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






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






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






45. What type of an operator is >= ?






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






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 relational algebra command to select rows from a table






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






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