Which of the following database security mechanisms is used to enforce multilevel security by classifying users and data into various security levels?

1. Mandatory security mechanisms

2. Discretionary security mechanisms

Which of the given options is targeted and focused on a single subset of an organization?

Consider a table named 'Account,' having the following fields.

Which of the following relational algebra expressions represents the query that will f‌ind names of customers having an account balance of over Rs. 5.000?

In which areas data-mining technology can be applied? 1. Marketing 2. Finance 3. Manufacturing 4. Healthcare

Which of the following correlated SQL queries will return Employeeld. EmployeeName, Salary and Department of all the employees whose salary is more than the average salary of employees in their respective departments?

A database system without concurrency control may cause:

Concurrency control is used .

What is the order of execution of operations during a pessimistic concurrency control technique?

Which of the following indexes in databases is usually dense?

Which of the following relations is also called a snapshot relation?