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70-762 Exam

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Q1. Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution. Determine whether the solution meets the stated goals.

You have a database that contains a table named Employees. The table stores information about the employees of your company.

You need to implement and enforce the following business rules:

Solution: You implement cascading referential integrity constraints on the table. Does the solution meet the goal?

A. Yes

B. No

Answer: A

Explanation:

References: https://technet.microsoft.com/en-us/library/ms186973(v=sql.105).aspx

Q2. DRAG DROP

Note: This question is part of a series of questions that use the same scenario. For your convenience, the scenario is repeated in each question. Each question presents a different goal and answer choices, but the text of the scenario is exactly the same in each question in the series.

You have a database named Sales that contains the following database tables. Customer, Order, and Products. The Products table and the order table shown in the following diagram.

The Customer table includes a column that stores the date for the last order that the customer placed.

You plan to create a table named Leads. The Leads table is expected to contain approximately 20,000 records. Storage requirements for the Leads table must be minimized.

You need to begin to modify the table design to adhere to third normal form.

Which column should you remove for each table? To answer? drag the appropriate column names to the correct locations. Each column name may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.

Answer:

Explanation:

In the Products table the SupplierName is dependant on the SupplierID, not on the ProductID.

In the Orders table the ProductName is dependant on the ProductID, not on the OrderID.

Note:

A table is in third normal form when the following conditions are met:

* It is in second normal form.

* All nonprimary fields are dependent on the primarykey.

Second normal form states that it should meet all the rules for First 1Normnal Form and there must be no partial dependences of any of the columns onthe primary key.

First normal form (1NF) sets the very basic rules for an organized database:

* Define the data items required, because they become the columns in a table. Place

related data items in a table.

* Ensure that there are no repeating groups ofdata.

* Ensure that there is a primary key. References:https://www.tutorialspoint.com/sql/third-normal-form.htm

Q3. HOTSPOT

You have a database named Sales that contains the following database tables: Customer, Order, and Products. The Products table and the Order table are shown in the following diagram.

The customer table includes a column that stores the data for the last order that the customer placed.

You plan to create a table named Leads. The Leads table is expected to contain approximately 20,000 records. Storage requirements for the Leads table must be

minimized.

The Leads table must include the columns described in the following table.

The data types chosen must consume the least amount of storage possible. You need to select the appropriate data types for the Leads table.

In the table below, identify the data type that must be used for each table column. NOTE: Make only one selection in each column.

Answer:

Explanation:

Bit is aTransact-SQL integer data type that can take a value of 1, 0, or NULL.

Smallint is aTransact-SQL integer data type that can take a value in the range from -32,768 to 32,767.

int, bigint, smallint, and tinyint (Transact-SQL) Exact-number data types that use integer data.

References:https://msdn.microsoft.com/en-us/library/ms187745.aspx https://msdn.microsoft.com/en-us/library/ms177603.aspx

Q4. You are experiencing performance issues with the database server.

You need to evaluate schema locking issues, plan cache memory pressure points, and backup I/O problems.

What should you create?

A. a System Monitor report

B. a sys.dm_exec_query_stats dynamic management view query

C. a sys.dm_exec_session_wait_stats dynamicmanagement view query

D. an Activity Monitor session in Microsoft SQL Management Studio.

Answer: C

Explanation:

sys.dm_exec_session_wait_stats returns information about all the waits encountered by threads that executed for each session. You can use this view to diagnose performance issues with the SQL Server session and also with specific queries and batches.

Note: SQL Server wait stats are, at their highest conceptual level, grouped into two broad categories: signal waits and resource waits. A signal wait is accumulated by processes running on SQL Server which are waiting for a CPU to become available (so called because the process has “signaled” that it is ready for processing). A resource wait is accumulated by processes running on SQL Server which are waiting fora specific resource to become available, such as waiting for the release of a lock on a specific record.

Q5. HOTSPOT

You have a database named Sales that contains the following database tables: Customer, Order, and Products. The Products table and the Order table are shown in the following diagram.

The customer table includes a column that stores the data for the last order that the customer placed.

You plan to create a table named Leads. The Leads table is expected to contain approximately 20,000 records. Storage requirements for the Leads table must be minimized.

You need to create triggers that meet the following requirements:

In the table below, identify the trigger types that meet the requirements.

NOTE: Make only selection in each column. Each correct selection is worth one point.

Answer:

Explanation:

INSTEAD OF INSERT triggers can be defined on a view or table to replace the standard action of the INSERT statement.

AFTER specifies that the DML trigger is fired only when all operationsspecified in the triggering SQL statement have executed successfully.

References:https://technet.microsoft.com/en-us/library/ms175089(v=sql.105).aspx

Q6. DRAG DROP

You have a database named DB1 that contains the following tables: Customer, CustomerToAccountBridge, and CustomerDetails. The three tables are part of the Sales schema. The database also contains a schema named Website. You create the Customer table by running the following Transact-SQL statement:

The value of the CustomerStatus column is equal to one for active customers. The value of the Account1Status and Account2Status columns are equal to one for active accounts. The

following table displays selected columns and rows from the Customer table.

You plan to create a view named Website.Customer and a view named Sales.FemaleCustomers.

Website.Customer must meet the following requirements:

1. Allow users access to the CustomerName and CustomerNumber columns for active customers.

2. Allow changes to the columns that the view references. Modified data must be visible through the view.

3. Prevent the view from being published as part of Microsoft SQL Server replication. Sales.Female.Customers must meet the following requirements:

1. Allow users access to the CustomerName, Address, City, State and PostalCode columns.

2. Prevent changes to the columns that the view references.

3. Only allow updates through the views that adhere to the view filter.

You have the following stored procedures: spDeleteCustAcctRelationship and spUpdateCustomerSummary. The spUpdateCustomerSummary stored procedure was created by running the following Transacr-SQL statement:

The following table displays a selected columns and rows from the Customer table. Thr value of the CustomerStatus column is equal to one for active customers. The value of the Account1Status and Account2Status columns are equal to one for active accounts.

You run the spUpdateCustomerSummary stored procedure to make changes to customer account summaries. Other stored procedures call the spDeleteCustAcctRelationship to delete records from the CustomerToAccountBridge table.

Users report that the following SELECT statement statement takes a long time to complete:

You need to create an index that meets the following requirements:

1. Improve the performance of the SELECT statement.

2. requires minimum index key size.

3. Only contains active customers.

4. Makes no change to the existing primary key.

5. Contains all of the columns required by the SELECT statement.

Which three Transact_SQL segments should you use to develop the solution? To answer, move the appropriate code blocks from the list of code blocks to the answer area and arrange them in the correct order.

Answer:

Explanation:

Box 1: Clustered Index

With the same size of keys, the nonclustered indexes need more space than clustered

indexes.

Box 2, Box 3:

Include the CustomerStatus column in the index, and only when CustomerStatusnot equal to 1 (the active customers).

References:http://www.sqlserverlogexplorer.com/overview-of-cluster-and-noncluster-index/

Q7. Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution. Determine whether the solution meets the stated goals.

You have a database that contains a table named Employees. The table stores information about the employees of your company.

You need to implement and enforce the following business rules: Solution: You implement a FOR UPDATE trigger on the table. Does the solution meet the goal?

A. Yes

B. No

Answer: B

Explanation:

References: http://stackoverflow.com/questions/16081582/difference-between-for-update-of-and-for-update

Q8. Note: This question is part of a series of questions that present the same scenario. Each question in this series contains a unique solution. Determine whether the solution meets the stated goals.

The Account table was created using the following Transact-SQL statement:

There are more than 1 billion records in the Account table. The Account Number column uniquely identifies each account. The ProductCode column has 100 different values. The values are evenly distributed in the table. Table statistics are refreshed and up to date.

You frequently run the following Transact-SQL SELECT statements:

You must avoid table scans when you run the queries. You need to create one or more indexes for the table. Solution: You run the following Transact-SQL statement:

Does the solution meet the goal?

A. Yes

B. No

Answer: A

Explanation:

Create a clustered index on theAccountNumber column as it is unique. Create a nonclustered index that includes the ProductCode column.

References:https://msdn.microsoft.com/en-us/library/ms190457.aspx

Q9. Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution. Determine whether the solution meets the stated goals.

You need to create a stored procedure that updates the Customer, CustomerInfo, OrderHeader, and OrderDetails tables in order.

You need to ensure that the stored procedure:

Solution: You create a stored procedure that includes the following Transact-SQL segment:

Does the solution meet the goal?

A. Yes

B. No

Answer: B

Explanation:

References: http://stackoverflow.com/questions/11444923/stored-procedure-to-update- multiple-tables

Q10. Note: This question is part of a series of questions that present the same scenario. Each question in this series contains a unique solution. Determine whether the solution meets the stated goals.

The Account table was created by using the following Transact-SQL statement:

You frequently run the following Transact-SQL SELECT statements:

You must avoid table scans when you run the queries. You need to create one or more indexes for the table.

Solution: You run the following Transact-SQL statement:

CREATE NONCLUSTERED INDEX IX_Account_ProductCode ON Account(ProductCode); Does the solution meet the goal?

A. Yes

B. No

Answer: A

Explanation:

References: https://msdn.microsoft.com/en-za/library/ms189280.aspx