SophiaPretty

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About SophiaPretty

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Expertise:
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Teaching Since: Jul 2017
Last Sign in: 304 Weeks Ago, 1 Day Ago
Questions Answered: 15833
Tutorials Posted: 15827

Education

  • MBA,PHD, Juris Doctor
    Strayer,Devery,Harvard University
    Mar-1995 - Mar-2002

Experience

  • Manager Planning
    WalMart
    Mar-2001 - Feb-2009

Category > Computer Science Posted 04 Dec 2017 My Price 10.00

Denormalization is never a good practice concurrency control

QUESTION 1

 

Denormalization is never a good practice.

 

 True

 False

 

QUESTION 2

 

The purpose of concurrency control is:

 

a.      preventing users from working on a database concurrently.

b.     ensuring that one user’s work does not influence another user’s work inappropriately.

c.      providing an opportunity for users to work on databases concurrently.

d.     stopping all concurrent transactions.

 

QUESTION 3

 

Locks placed automatically by the DBMS are called:

 

a.      implicit locks.

b.     explicit locks.

c.      automated locks.

d.     DBMS locks.

 

 

 

 

 

 

 

QUESTION 4

 

Locks placed by the user for exclusive rights to the data are called:

 

a.      implicit locks.

b.     explicit locks.

c.      user-defined locks.

d.     exclusive locks.

 

 

QUESTION 5

 

A pointer into a set of rows that are the result set from an SQL SELECT statement is called a:

 

a.      SQL pointer.

b.     selector.

c.      row pointer.

d.     cursor.

 

QUESTION 6

Reprocessing is not typically the best method of recovery from a failure in a multiuser system.

 

 True

 False

 

QUESTION 7

"User-defined function” and “stored procedure” are synonyms.

 

 True

False

 

QUESTION 8

 

The standard developed in the early 90’s to provide a DBMS-independent means for processing relational database data is:

 

a.      ADO

b.     AMP

c.      ODBC

d.     API

 

QUESTION 9

 

A database system that has data, programs, and personnel specializing in the preparation of data for BI processing is called:

 

a.      a data mart.

b.     an ETL system.

c.      OLAP

 

QUESTION 10

Dimensional database use which type of design:

 

A.     Normalized database design

B.     Star schema

C.     Operational database design

D.     Dimensional schema

 

QUESTION 11

Describe the lost update problem.

 

QUESTION 12

What is the difference between authentication and authorization?

QUESTION 13

What is an SQL injection attack?

 

QUESTION 14

 

What are six problems with using operational data for BI processing?

 

QUESTION 15

What is a data mart?

 

QUESTION 16

What is the difference between a database and a DBMS?

 

QUESTION 17

What is a surrogate key?

 

QUESTION 18

Discuss three reasons to learn SQL even though Microsoft Access provides us with a Query Wizard?

 

QUESTION 19

List and describe the three types of binary relationships.

 

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SophiaPretty
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Status NEW Posted 04 Dec 2017 06:12 AM My Price 10.00

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