The                            layer, which provides a high-level view of data and actions on data.

Related MCQs

• The                              layer, which provides the interface between the business-logic layer and the underlying database.
•                    is an attack which forces an end user to execute unwanted actions on a web application in which he/she is currently authenticated.
• Which of the following is an atomic sequence of database actions?
• The actions which are played in the order while recording it is called                               history.
• For every relationship, how many possible types of actions are there when enforcing minimum cardinalities?
• View the Exhibit and examine the data in the EMPLOYEES tables. Evaluate the following SQL statement: SELECT employee_id, department_id FROM employees WHERE department_id= 50 ORDER BY department_id UNION SELECT employee_id, department_id FROM employees WHERE department_id= 90 UNION SELECT employee_id, department_id FROM employees WHERE department_id= 10; What would be the outcome of the above SQL statement?
• Which feature converts row data to a column for better analytical view?
•                      is increasingly being used in server systems to improve performance by caching frequently used data, since it provides faster access than disk, with larger storage capacity than main memory.
• Which one of the following provides the ability to query information from the database and to insert tuples into, delete tuples from, and modify tuples in the database?
• View the Exhibit and examine the structure of the EMPLOYEES and DEPARTMENTS tables. Which SET operator would you use in the blank space in the following SQL statement to list the departments where all the employees have managers? SELECT department_id FROM departments ____ SELECT department_id FROM employees WHERE manager_id IS NULL;