Hawerth Castro
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Hawerth Castro
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CET_TARDE - MTA Database - DIAGNOSTIC1

Pregunta 1 de 12

1

John works as a Database Administrator for Bluewell Inc. The company has a SQL Server
database. A table in the database has a candidate key and an attribute that is not a constituent of
the candidate key. The non-key attribute depends upon the whole of the candidate key rather
than just a part of it. Which of the following normal forms is represented in the scenario?

Selecciona una de las siguientes respuestas posibles:

  • 4 NF

  • 2 NF

  • 1 NF

  • 3 NF

Explicación

Pregunta 2 de 12

1

You work as a Database Designer for DataOneWorld Inc. The company has a SQL Server database. You are assigned the task of creating a data model of an enterprise based on a specific data model. The model to be created should be independent of a particular DBMS. Which of the following database designs will help you accomplish the task?

Selecciona una de las siguientes respuestas posibles:

  • Logical database design

  • Conceptual database design

  • Physical database design

  • Application design

Explicación

Pregunta 3 de 12

1

Which of the following steps in database planning helps to determine the requirements of the database through interviewing?

Selecciona una de las siguientes respuestas posibles:

  • Gathering information

  • Identifying the relationship between objects

  • Identify the objects

  • Identifying the type of information for each objects

  • Modeling the object

Explicación

Pregunta 4 de 12

1

Consider the case of a fruit juice company. The company manufactures fruit juices and supplies them to wholesalers. The Database Designer creates a table named Production. The code is given below:
1. CREATE Table Production
2. (Fruit_type VarChar,
3. Fruit_name Char(20),
4. Quantity Int(3))
Which of the above-mentioned lines has an error?

Selecciona una de las siguientes respuestas posibles:

  • Line 3

  • Line 2

  • Line 1

  • Line 4

Explicación

Pregunta 5 de 12

1

John works as a Database Administrator for DataOneWorld Inc. The company has a SQL Server database. John wants to insert records in a table where the database is structured in a fixed format. Which of the following data models will he use to accomplish the task?

Selecciona una de las siguientes respuestas posibles:

  • Object relational data model

  • Entity-Relationship Model

  • Network data model

  • Relational model

Explicación

Pregunta 6 de 12

1

You manage a database named Customers, which includes a table named Orders. The Orders table is frequently queried, but only orders with a sales total of more than $1000.00 are required in the query. You want to create an index to speed up these types of queries at the same time, ensuring the index is as small as possible. What type of index should you use?

Selecciona una de las siguientes respuestas posibles:

  • Non-clustered

  • Filtered

  • Clustered

  • XML

Explicación

Pregunta 7 de 12

1

Which of the following database terms is described in the statement below? "It prevents the current database operation from reading or writing a data item while the data item is being accessed by another operation."

Selecciona una de las siguientes respuestas posibles:

  • Lock

  • Encryption

  • Constraint

  • Deadlock

Explicación

Pregunta 8 de 12

1

Your Company is designing and developing a number of databases for a stock exchange. One of the databases will contain highly sensitive data for which high level of security will be required. Although high processing speed is one of the prime requirements of the customer, for this database, security of the data will take priority over the processing speed. It needs to be ensured that even if unauthorized access to the database is obtained, the rogue user is unable to read the data. Which of the following protection techniques will you suggest for this database?

Selecciona una de las siguientes respuestas posibles:

  • Authentication

  • Encryption

  • Native auditing

  • Integrity controls

Explicación

Pregunta 9 de 12

1

You work as a Database Administrator for DataOneWorld Inc. Management instructs you to remove an object from the relational database management system. Which of the following statements will you use to accomplish the task?

Selecciona una de las siguientes respuestas posibles:

  • DROP

  • SELECT

  • CREATE

  • ALTER

Explicación

Pregunta 10 de 12

1

Which of the following is a building working model of a database system?

Selecciona una de las siguientes respuestas posibles:

  • Prototyping

  • Bottom-up approach

  • Conceptual database design

  • Top-down approach

Explicación

Pregunta 11 de 12

1

Remo works as a Database Designer for Tech Inc. He wants to create a table named Product. He issues the following query to create the Product table:

CREATE Product (
ProductID Char (10) NOT NULL,
OrderID Char (10) NULL
ProductName Varchar NOT NULL,
Primary key (OrderID, ProductID))

What are the errors in the above query?
Each correct answer represents a complete solution. (Choose two.)

Selecciona una o más de las siguientes respuestas posibles:

  • An attribute declared as a primary key cannot contain NULL values.

  • Each attribute should be defined as a primary key separately.

  • A table cannot have two primary keys.

  • ProductName is declared as Varchar without specifying the width of the column.

Explicación

Pregunta 12 de 12

1

You are a database developer for a database named Customers hosted on a SQL Server 2008 server. Recently, several customers were deleted from the Customers database. To ensure this is not repeated in future, you have decided to create a DML trigger to prevent it. What code will create the trigger to meet your goals? Each correct answer represents a complete solution. (Choose all that apply.)

Selecciona una o más de las siguientes respuestas posibles:

  • CREATE TRIGGER trgDeleteCustomer ON dbo.Customers
    BEFORE DELETE AS
    RAISERROR ('Customers cannot be deleted. An error has been logged', 16, 10) WITH LOG ROLLBACK TRANSACTION

  • CREATE TRIGGER trgDeleteCustomer ON dbo.Customers
    AFTER DELETE AS
    RAISERROR ('Customers cannot be deleted. An error has been logged', 16, 10) WITH LOG ROLLBACK TRANSACTION

  • CREATE TRIGGER trgDeleteCustomer ON dbo.Customers
    AFTER DELETE
    AS
    IF (SELECT COUNT(*) FROM DELETED) > 1
    BEGIN
    RAISERROR ('Customers cannot be deleted. An error has been logged', 16, 10) WITH LOG ROLLBACK TRANSACTION
    END

  • ) CREATE TRIGGER trgDeleteCustomer ON dbo.Customers
    AFTER DELETE AS
    IF (SELECT COUNT(*) FROM DELETED) > 0
    BEGIN
    RAISERROR ('Customers cannot be deleted. An error has been logged', 16, 10) WITH LOG ROLLBACK TRANSACTION
    END

Explicación

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