Welcome to DataBase Quiz, Randomly Selected !!

Question 1. Which of the following is NOT a valid description of the public role?

The public role captures all default permissions for users in a database.

The public role cannot be dropped.

The public role is contained in every database, including msdb, tempdb, model, and all user databases except in the master database for security purposes.

The public role cannot have users, groups, or roles assigned to it.

Question 2. With SQL, how do you select all the records from a table named "Persons" where the value of the column "FirstName" starts with an "a"?

SELECT * FROM Persons WHERE FirstName='%a%'

SELECT * FROM Persons WHERE FirstName LIKE '%a'

SELECT * FROM Persons WHERE FirstName='a'

SELECT * FROM Persons WHERE FirstName LIKE 'a%'

Question 3. Given the relations
employee (name, salary, deptno) and department (deptno, deptname, address)
Which of the following queries cannot be expressed using the basic relational algebra operations (U, -, x, , p)?

Department address of every employee

Employees whose name is the same as their department name

The sum of all employees? salaries

All employees of a given department

Question 4. What will be the output of the following statement? SELECT LEN(CAST(LEFT('026-100', 3) AS INT))

Statement will generate an error.




Question 5. Which of the following is true of a network structure?

It is a physical representation of the data

It allows a many-to-many relationship

It is conceptually simple

It will be dominant data base of the future

Question 6. The ascending order of a data hirerchy is:





Question 7. With SQL, how do you select all the records from a table named "Persons" where the "FirstName" is "Peter" and the "LastName" is "Jackson"?

SELECT * FROM Persons WHERE FirstName LIKE 'Peter' AND LastName LIKE 'Jackson'

SELECT * FROM Persons WHERE FirstName='Peter' AND LastName='Jackson'

SELECT FirstName='Peter', LastName='Jackson' FROM Persons

none of the above

Question 8. The relational database environment has all of the following components except


separate files

query languages


Question 9. You are managing the in-house database systems. You are creating a series of secondary indexes in your relational database. By doing so, which of the following issues must be carefully considered .

confusion in selection of optimal query execution method

disk space consumption

performance overhead

All of the above

Question 10. What is used by a properly designed DBMS to enable databases to be returned to the pre-transaction state should errors occur?

two phase commit

prefetch transaction

one phase commit

backup and restore