Q21. We know that tables in a database are linked or related through one or more common columns or fields. This common field is called ___________________
Q22. _____________________ maintains a single repository of data at a centralised location that can be used by multiple users at the same time.
Q23. __________________ represents the design or structure of a database.
Q24. ___________________ is also called the visual or logical architecture as it tells us how the data are organised in a database.
Q25. Sometimes we put certain restrictions or limitations on the type of data that can be inserted in one or more columns of a table. These restriction is called ________________________
Q26. ___________________ are used to ensure accuracy and reliability of data in the database.
Q27. A _________________ is data about the data.
Q28. Meta data is also known as _______________________
Q29. Which of the following is not the data constraint in DBMS?
Q30. After loading data, the state or snapshot of the database at any given time is the _______________________.