Microsoft 70-762 Free Practice Questions

Q1. 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 this series.

You have a database that contains the following tables: BlogCategory, BlogEntry, ProductReview, Product, and SalesPerson. The tables were created using the following Transact SQL statements:

You must modify the ProductReview Table to meet the following requirements:

1. The table must reference the ProductID column in the Product table

2. Existing records in the ProductReview table must not be validated with the Product table.

3. Deleting records in the Product table must not be allowed if records are referenced by the ProductReview table.

4. Changes to records in the Product table must propagate to the ProductReview table.

You also have the following database tables: Order, ProductTypes, and SalesHistory, The transact-SQL statements for these tables are not available.

You must modify the Orders table to meet the following requirements:

1. Create new rows in the table without granting INSERT permissions to the table.

2. Notify the sales person who places an order whether or not the order was completed.

You must add the following constraints to the SalesHistory table:

- a constraint on the SaleID column that allows the field to be used as a record identifier

- a constant that uses the ProductID column to reference the Product column of the ProductTypes table

- a constraint on the CategoryID column that allows one row with a null value in the column

- a constraint that limits the SalePrice column to values greater than four

Finance department users must be able to retrieve data from the SalesHistory table for sales persons where the value of the SalesYTD column is above a certain threshold.

You plan to create a memory-optimized table named SalesOrder. The table must meet the following requirements:

- The table must hold 10 million unique sales orders.

- The table must use checkpoints to minimize I/O operations and must not use transaction logging.

- Data loss is acceptable.

Performance for queries against the SalesOrder table that use Where clauses with exact equality operations must be optimized.

You need to enable referential integrity for the ProductReview table.

How should you complete the relevant Transact-SQL statement? To answer? select the appropriate Transact-SQL segments in the answer area.

Select two alternatives.

A. For the first selection select: WITH CHECK

B. For the first selection select: WITH NOCHECK

C. For the second selection select: ON DELETE NO ACTION ON UPDATE CASCADE

D. For the second selection select: ON DELETECASCADE ON UPDATE CASCADE

E. For the second selection select: ON DELETE NO ACTION ON UPDATE NO ACTION

F. For the second selection select: ON DELETE CASCADE ON UPDATE NO ACTION

Answer: B,C

Explanation:

B: We should use WITH NOCHECK as existing records inthe ProductReview table must not be validated with the Product table.

C: Deletes should not be allowed, so we use ON DELETE NO ACTION. Updates should be allowed, so we use ON DELETE NO CASCADE

NO ACTION: the Database Engine raises an error, and the updateaction on the row in the parent table is rolled back.

CASCADE: corresponding rows are updated in the referencing table when that row is updated in the parent table.

Note: ON DELETE { NO ACTION | CASCADE | SET NULL | SET DEFAULT }

Specifieswhat action happens to rows in the table that is altered, if those rows have a referential relationship and the referenced row is deleted from the parent table. The default is NO ACTION.

ON UPDATE { NO ACTION | CASCADE | SET NULL | SET DEFAULT }

Specifieswhat action happens to rows in the table altered when those rows have a referential relationship and the referenced row is updated in the parent table. The default is NO ACTION.

Note: You must modify the ProductReview Table to meet the following requirements:

1. The table must reference the ProductID column in the Product table

2. Existing records in the ProductReview table must not be validated with the Product table.

3. Deleting records in the Product table must not be allowed if records are referencedby theProductReview table.

4. Changes to records in the Product table must propagate to the ProductReview table.

References:https://msdn.microsoft.com/en-us/library/ms190273.aspx https://msdn.microsoft.com/en-us/library/ms188066.aspx

Q2. HOTSPOT

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 this series.

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

Q3. 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.

You are developing a new application that uses a stored procedure. The stored procedure inserts thousands of records as a single batch into the Employees table.

Users report that the application response time has worsened since the stored procedure was updated. You examine disk-related performance counters for the Microsoft SQL Server instance and observe several high values that include a disk performance issue. You examine wait statistics and observe an unusually high WRITELOG value.

You need to improve the application response time.

Solution: You replace the stored procedure with a user-defined function. Does the solution meet the goal?

A. Yes

B. No

Answer: B

Explanation:

References: https://msdn.microsoft.com/en-us/library/ms345075.aspx

Q4. Note: The question is part of a series of questions that use the same or similar answer choices. An answer choice may be correct for more than one question in the series. Each question is independent of the other question in the series. Information and details provided in a question apply only to that question.

You have a database named DB1. The database does not use a memory-optimized filegroup. The database contains a table named Table1. The table must support the following workloads:

You need to add the most efficient index to support the new OLTP workload, while not deteriorating the existing Reporting query performance.

What should you do?

A. Create a clustered index on the table.

B. Create a nonclustered index on the table.

C. Create a nonclustered filtered index on the table.

D. Create a clusteredcolumnstore index on the table.

E. Create a nonclustered columnstore index on the table.

F. Create a hash index on the table.

Answer: C

Explanation:

A filtered index is an optimized nonclustered index, especially suited to cover queries that

select from awell-defined subset of data. It uses a filter predicate to index a portion of rows in the table. A well-designed filtered index can improve query performance, reduce index maintenance costs, and reduce index storage costs compared with full-table indexes.

References:https://technet.microsoft.com/en-us/library/cc280372(v=sql.105).aspx

Q5. 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

Q6. 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.

Your company has employees in different regions around the world.

You need to create a database table that stores the following employee attendance information:

- Employee ID

- date and time employee checked in to work

- date and time employee checked out of work

Date and time information must be time zone aware and must not store fractional seconds. Solution: You run the following Transact-SQL statement:

Does the solution meet the goal?

A. Yes

B. No

Answer: A

Explanation:

Datetimeoffset defines a date that is combined with a time of a day that has time zone awareness and is based on a 24-hour clock.

Syntaxis: datetimeoffset [ (fractional seconds precision) ]

Forthe use"datetimeoffset(0)", the Fractional seconds precision is 0, which is required here. References:https://msdn.microsoft.com/en-us/library/bb630289.aspx

Q7. Note: this question is part of a series of questions that use the same or similar answer choices. An answer choice may be correct for more than one question in the series. Each question is independent of the other questions in the series. Information and details provided in a question apply only to that question.

You are developing an application to track customer sales.

You need to create a database object that meets the following requirements:

- Return a value of 0 if data inserted successfully into the Customers table.

- Return a value of 1 if data is not inserted successfully into the Customers table.

- Support logic that is written by using managed code. What should you create?

A. extended procedure

B. CLR procedure

C. user-defined procedure

D. DML trigger

E. DDL trigger

F. scalar-valued function

G. table-valued function

Answer: B

Explanation:

DML triggers is a special type of stored procedure that automatically takes effect when a data manipulation language (DML) event takes place that affects the table or view defined in the trigger. DML events include INSERT, UPDATE, or DELETE statements.DML triggers can be used to enforce business rules and data integrity, query other tables, and include complex Transact-SQL statements.

A CLR trigger is a type of DDL trigger. A CLR Trigger can be either an AFTER or INSTEAD OF trigger. A CLR trigger canalso be a DDL trigger. Instead of executing a Transact-SQL stored procedure, a CLR trigger executes one or more methods written in managed code thatare members of an assembly created in the .NET Framework and uploaded in SQL Server.

References:https://msdn.microsoft.com/en-us/library/ms178110.aspx

Q8. You have a view that includes an aggregate.

You must be able to change the values of columns in the view. The changes must be reflected in the tables that the view uses.

You need to ensure that you can update the view. What should you create?

A. table-valued function

B. a schema-bound view

C. a partitioned view

D. a DML trigger

Answer: B

Explanation:

When you use the SchemaBinding keyword while creating a view or function you bindthe structure of any underlying tables or views. It means that as long as that schemabound object exists as a schemabound object (ie you don’t remove schemabinding) you are limited in changes that can be made to the tables or views that it refers to.

References:https://sqlstudies.com/2014/08/06/schemabinding-what-why/

Q9. DRAG DROP

You have a database that contains three encrypted store procedures named dbo.Proc1, dbo.Proc2 and dbo.Proc3. The stored procedures include INSERT, UPDATE, DELETE and BACKUP DATABASE statements.

You have the following requirements:

- You must run all the stored procedures within the same transaction.

- You must automatically start a transaction when stored procedures include DML statements.

- You must not automatically start a transaction when stored procedures include DDL statements.

You need to run all three stored procedures.

Which four Transact-SQL segments should you use to develop the solution? To answer, move the appropriate Transact-SQL segments to the answer area and arrange then in the correct order.

Answer:

Explanation:

Note:

Implicit transaction mode remains in effect until the connection executes a SET IMPLICIT_TRANSACTIONS OFF statement,which returns the connection to autocommit mode. In autocommit mode, allindividual statements are committed if they complete successfully.

When a connection is in implicit transaction mode and the connection is not currently in a transaction, executing any of the following statements starts a transaction:

ALTER TABLE (DDL) FETCH

REVOKE

BEGIN TRANSACTION GRANT

SELECT CREATE (DDL) INSERT

TRUNCATE TABLE DELETE (DML) OPEN

UPDATE (DML) DROP (DDL)

Note 2: XACT_STATE returns the following values.

1 The currentrequest has an active user transaction. The request can perform any actions, including writing data and committing the transaction. The transaction is committable.

-1 The current request has an active user transaction, but an error has occurred that has caused the transaction to be classified as an uncommittable transaction.the transaction is uncommittable and should be rolled back.

0 There is no active user transaction for the current request. Acommit or rollback operation would generate an error.

References:

https://technet.microsoft.com/en-us/library/ms187807(v=sql.105).aspx https://technet.microsoft.com/en-us/library/ms189797(v=sql.110).aspx

Q10. Background

You have a database named HR1 that includes a table named Employee.

You have several read-only, historical reports that contain regularly changing totals. The reports use multiple queries to estimate payroll expenses. The queries run concurrently. Users report that the payroll estimate reports do not always run. You must monitor the database to identify issues that prevent the reports from running.

You plan to deploy the application to a database server that supports other applications. You must minimize the amount of storage that the database requires.

Employee Table

You use the following Transact-SQL statements to create, configure, and populate the Employee table:

Application

You have an application that updates the Employees table. The application calls the following stored procedures simultaneously and asynchronously:

The application uses views to control access to data. Views must meet the following requirements:

Exhibit

You are analyzing the performance of the database environment. You discover that locks that are held for a long period of time as the reports are generated.

You need to generate the reports more quickly. The database must not use additional resources.

What should you do?

A. Update the transaction level of the report query session to READPAST.

B. Modify the report queries to use the UNION statement to combine the results of two or more queries.

C. Set the READ_COMMITTED_SNAPSHOT database option to ON.

D. Update the transaction level of the report query session to READ UNCOMMITTED.

Answer: C

Explanation:

References: https://technet.microsoft.com/en-us/library/ms173763(v=sql.105).aspx

Q11. Note: This question is part of a series of questions that use the same or similar answer choices. An Answer choice may be correct for more than one question in the series. Each question independent of the other questions in this series. Information and details provided in a question apply only to that question.

You are a database developer for a company. The company has a server that has multiple physical disks. The disks are not part of a RAID array. The server hosts three Microsoft SQL Server instances. There are many SQL jobs that run during off-peak hours.

You must monitor and optimize the SQL Server to maximize throughput, response time, and overall SQL performance.

You need to identify previous situations where a modification has prevented queries from selecting data in tables.

What should you do?

A. Create a sys.dm_os_waiting_tasks query.

B. Create a sys.dm_exec_sessions query.

C. Create a Performance Monitor Data Collector Set.

D. Create a sys.dm_os_memory_objects query.

E. Create a sp_configure ‘max server memory’query.

F. Create a SQL Profiler trace.

G. Create a sys.dm_os_wait_stats query.

H. Create an Extended Event.

Answer: G

Explanation:

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

Q12. 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

Q13. Note: This question is part of a series of questions that use the same answer choices. An answer choice may be correct for more than one question in the series. Each question is independent of the other questions in this series. Information and details provided in a question apply only to that question.

You are developing an application to track customer sales. You create tables to support the application. You need to create a database object that meets the following data entry requirements:

What should you create?

A. extended procedure

B. CLR procedure

C. user-defined procedure

D. DML trigger

E. DDL trigger

F. scalar-valued function

G. table-valued function

Answer: C

Explanation:

References: https://msdn.microsoft.com/en-us/library/ms345075.aspx

Q14. 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/

Q15. DRAG DROP

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 need to create Sales.FemaleCustomers.

How should you complete the view definition? To answer, drag the appropriate Transact- SQL segments to the correct locations. Each Transact_SQL segment 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:

Box 1:WITH SCHEMABINDING:

SCHEMABINDING binds the viewto the schema of the underlying table or tables. When SCHEMABINDING is specified, the base table or tables cannot be modified in a way that would affect the view definition.

Box 2:Box 2: WITH CHECK OPTION

CHECK OPTION forces all data modification statements executed against the view to follow the criteria set within select_statement. When a row is modified through a view, the WITH CHECK OPTION makes sure the data remains visible through the view after the modification is committed.

Note: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 theview references.

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

References:https://msdn.microsoft.com/en-us/library/ms187956.aspx

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