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WGU Data Management – Foundations Exam

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Total Questions : 60

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Question # 1

Which type of join is demonstrated by the following query?

sql

SELECT *

FROM Make, Model

WHERE Make.ModelID = Model.ID;

Options:

A.  

NON-EQUIJOIN

B.  

SELF JOIN

C.  

EQUIJOIN

D.  

CROSS JOIN

Discussion 0
Question # 2

What is information independence?

Options:

A.  

An ability to change database type

B.  

An ability to make changes to existing queries

C.  

An ability to interchange databases

D.  

An ability to change the organization of data

Discussion 0
Question # 3

Which clause is used to specify the join columns when performing a join in MySQL?

Options:

A.  

AS

B.  

JOIN

C.  

ON

D.  

AND

Discussion 0
Question # 4

Which operation finds an entry containing a search value by repeatedly splitting the index in two?

Options:

A.  

Table scan

B.  

Binary search

C.  

Index scan

D.  

Fan-out

Discussion 0
Question # 5

Which statement uses valid syntax for the DELETE statement in SQL?

Options:

A.  

DELETE table_name WHERE condition;

B.  

DELETE FROM table_name WHERE condition;

C.  

DELETE FROM table_name;

D.  

DELETE * FROM table_name WHERE condition;

Discussion 0
Question # 6

Which phase of entity-relationship modeling refers to the maxima and minima of relationships and attributes?

Options:

A.  

Cardinality

B.  

Physical design

C.  

Attribute minimum

D.  

Partition

Discussion 0
Question # 7

Which product has an open-source license in addition to having a non-relational system?

Options:

A.  

MongoDB

B.  

SQL Server

C.  

MySQL

D.  

Oracle Database

Discussion 0
Question # 8

Which characteristic is true for non-relational databases?

Options:

A.  

They are optimized for big data.

B.  

They support the SQL query language.

C.  

They are ideal for databases that require an accurate record of transactions.

D.  

They store data in tables, columns, and rows, similar to a spreadsheet.

Discussion 0
Question # 9

Which operator defines the field that the index is using in a CREATE TABLE statement?

Options:

A.  

ON

B.  

IN

C.  

UNIQUE

D.  

CHECK

Discussion 0
Question # 10

Which object relates an entity to itself in an entity-relationship model?

Options:

A.  

Repository

B.  

Relationship instance

C.  

Reflexive relationship

D.  

Attribute

Discussion 0
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