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Database Fundamentals

Question No: 61

You have a table named Product that contains one million rows.

You need to search for product information in the Product table by using the product#39;s unique ID.

What will make this type of search more efficient?

  1. A cursor

  2. A subquery

  3. A trigger

  4. An index

Answer: D

Question No: 62

You need to rename a column in a database table.

Which data definition language (DDL) statement should you use?

  1. ALTER

  2. INSERT

  3. CREATE

  4. UPDATE

Answer: A

Question No: 63 HOTSPOT

Instructions: For each of the following statements, select Yes if the statement is true. Otherwise, select No. Each correct selection is worth one point.

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Answer:

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Explanation:

Ensurepass 2018 PDF and VCE

C:\Users\Kamran\Desktop\image – Copy.jpg

Question No: 64 HOTSPOT

Instructions: For each of the following statements, select Yes if the statement is true. Otherwise, select No. Each correct selection is worth one point.

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Answer:

Ensurepass 2018 PDF and VCE

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Explanation:

C:\Users\Kamran\Desktop\image – Copy.jpg

Question No: 65

You develop a database to store data about textbooks. The data must be stored to process at a later time.

Which database object should you use to store the data?

  1. View

  2. Table

  3. Function

  4. Stored procedure

Answer: D

Question No: 66

You assign User1 a set of permissions that include the WITH GRANT OPTION. The WITH GRANT OPTION enables User1 to:

  1. request a log of permission use.

  2. delegate permissions to other users.

  3. create new database users.

  4. view other users#39; permissions.

Answer: C

Question No: 67

You are writing an SQL statement to retrieve rows from a table. Which data manipulation language (DML) command should you use?

  1. READ

  2. SELECT

  3. OUTPUT

  4. GET

Answer: B

Question No: 68

Which database term is used to describe the process of applying a backup to a damaged or corrupt database?

  1. Recover

  2. Restore

  3. Commit

  4. Attach

Answer: B

Question No: 69

This question requires that you evaluate the underlined text to determine if it is correct. Use the ALLOW SELECT command to give a user permission to read the data in a table.

Instructions: Review the underlined text. If it makes the statement correct, select quot;No change is needed.quot; If the statement is incorrect, select the answer choice that makes the statement correct

  1. No change is needed

  2. GRANT SELECT

  3. LET HEAD

  4. PERMIT READ

Answer: B

Question No: 70

You need to store product quantities, and you want to minimize the amount of storage space that is used. Which data type should you use?

  1. INTEGER

  2. DOUBLE

  3. COUNT

  4. FLOAT

Answer: A

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