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Microsoft 70-762 問題練習

Developing SQL Databases 試験

最新更新時間: 2019/05/15,合計20問。

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Question No : 1
HOTSPOT
You have a database that contains both disk-based and memory-optimized tables. You need to create two modules.
The modules must meet the requirements described in the following table.



Which programming object should you use for each module? To answer, select the appropriate object types in the answer area.



正解:

Question No : 2
You are developing an application that connects to a database.
The application runs the following jobs:



The READ_COMMITTED_SNAPSHOT database option is set to OFF, and auto-content is set to ON.
Within the stored procedures, no explicit transactions are defined.
If JobB starts before JobA, it can finish in seconds. If JobA starts first, JobB takes a long time to complete.
You need to use Microsoft SQL Server Profiler to determine whether the blocking that you observe in JobB is caused by locks acquired by JobA.
Which trace event class in the Locks event category should you use?
A. LockAcquired
B. LockCancel
C. LockDeadlock
D. LockEscalation

正解: A

Question No : 3
You have a database that is experiencing deadlock issues when users run queries. You need to ensure that all deadlocks are recorded in XML format.
What should you do?

正解:

Question No : 4
HOTSPOT
You are profiling a frequently used database table named UserEvents. The READ_COMMITED_SNAPSHOT database option is set to OFF.
In the trace results, you observe that lock escalation occurred for one stored procedure even though the number of locks in the database did not exceed memory or configuration thresholds.
Events details are provided in the following table:



You need to modify the uspDeleteEvents stored procedure to avoid lock escalation.
How should you modify the stored procedure? To answer, select the appropriate Transact-SOL segments in the answer area.



正解:

Question No : 5
DRAG DROP
You have a database that contains three encrypted store procedures named dbo.Procl, 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-SOL segments should you use to develop the solution? To answer, move the appropriate Transact-SOL segments to the answer area and arrange then in the correct order.



正解:

Question No : 6
DRAG DROP
You have two database tables. Table1 is a partioned table and Table 2 is a nonpartioned table.
Users report that queries take a long time to complete. You monitor queries by using Microsoft SQL Server Profiler. You observe lock escalation for Tableland Table 2. You need to allow escalation of Table1 locks to the partition level and prevent all lock escalation for Table2.
Which Transact-SOL statement should you run for each table? To answer, drag the appropriate
Transact-SOL statements to the correct tables. Each command 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.



正解:

Question No : 7
DRAG DROP
You are evaluating the performance of a database environment. You must avoid unnecessary locks and ensure that lost updates do not occur. You need to choose the transaction isolation level for each data scenario.
Which isolation level should you use for each scenario? To answer, drag the appropriate isolation levels to the correct scenarios. Each isolation 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.



正解:

Question No : 8
DRAG DROP
You are analyzing the performance of a database environment. Applications that access the database are experiencing locks that are held for a large amount of time. You are experiencing isolation phenomena such as dirty, nonrepeatable and phantom reads. You need to identify the impact of specific transaction isolation levels on the concurrency and consistency of data.
What are the consistency and concurrency implications of each transaction isolation level? To answer, drag the appropriate isolation levels to the correct locations. Each isolation level 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.



正解:

Question No : 9
If an error occurs during a delete operation on either table, all changes must be rolled back, otherwise all changes should be committed.
How should you complete the procedure? To answer, select the appropriate Transact-SOL segments in the answer area.



正解:

Question No : 10
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 Sale Price 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 1/0 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 create the Sales Order table
How should you complete the table definition? To answer? select the appropriate Transact-SOL segments in the answer area.



正解:

Question No : 11
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 Sale Price 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 1/0 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 update the SalesHistory table
How should you complete the Transact_SQL statement? To answer? select the appropriate TransactSOL, segments in the answer area.



正解:

Question No : 12
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 Sale Price 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 1/0 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 modify the design of the Orders table.
What should you create?

正解:

Question No : 13
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 Sale Price 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 requirments:
- The table must hold 10 million unique sales orders.
- The table must use checkpoints to minimize 1/0 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 create an object that allows finance users to be able to retrieve the required data. The object must not have a negative performance impact.
How should you complete the Transact-SOL statements? To answer, select the appropriate TransactSOL segments in the answer area.



正解:

Question No : 14
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 Sale Price 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 1/0 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-SOL statement? To answer? Select the appropriate Transact-SOL segments in the answer area.



Select two alternatives.

正解:

Question No : 15
DRAG DROP
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.



正解:

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