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Exam 70-762: Developing SQL Databases – Microsoft: https://www.microsoft.com/en-us/learning/exam-70-762.aspx
This exam is intended for database professionals who build and implement databases across organizations and who ensure high levels of data availability. Their responsibilities include creating database files, data types, and tables; planning, creating, and optimizing indexes; ensuring data integrity; implementing views, stored procedures, and functions; and managing transactions and locks.
pass4itsure 70-762 Skills measured
This exam measures your ability to accomplish the technical tasks listed below. The percentages indicate the relative weight of each major topic area on the exam.
Design and implement database objects (25–30%)
- Design and implement a relational database schema
- Design and implement indexes
- Design and implement views
- Implement columnstore indexes
Implement programmability objects (20–25%)
- Ensure data integrity with constraints
- Create stored procedures
- Create triggers and user-defined functions
Manage database concurrency (25–30%)
- Implement transactions
- Manage isolation levels
- Optimize concurrency and locking behavior
- Implement memory-optimized tables and native stored procedures
Optimize database objects and SQL infrastructure (20–25%)
- Optimize statistics and indexes
- Analyze and troubleshoot query plans
- Manage performance for database instances
- Monitor and trace SQL Server baseline performance metrics
Latest effective Microsoft MCSA 70-762 Exam Practice Tests
QUESTION 1
You have a trigger named CheckTriggerCreation that runs when a user attempts to create a trigger. The
The CheckTriggerCreation trigger was created with the ENCRYPTION option and additional proprietary business logic.
You need to prevent users from running the ALTER and DROP statements or the sp_tableoption stored procedure.
Which three Transact-SQL segments should you use to develop the solution? To answer, move the appropriate
Transact-SQL segments from the list of Transact-SQL segments to the answer area and arrange them in the correct
order.
Select and Place:
Correct Answer:
QUESTION 2
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 this series.
Information and details provided in a question apply only to that question.
You have a database named DB1. There is no memory-optimized filegroup in the database. You run the following
query:
The following image displays the execution plan the query optimizer generates for this query: Users frequently run the
same query with different values for the local variable @lastName. The table named Person is persisted on disk. You
need to create an index on the Person. Person table that meets the following requirements:
1.
All users must be able to benefit from the index.
2.
FirstName must be added to the index as an included column.
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 clustered column store index on the table.
E. Create a nonclustered column store index on the table.
F. Create a hash index on the table.
Correct Answer: B
By including nonkey columns, you can create nonclustered indexes that cover more queries. This is because the
no key columns have the following benefits:
They can be data types not allowed as index key columns.
They are not considered by the Database Engine when calculating the number of index key columns or index key size.
QUESTION 3
You are monitoring a Microsoft Azure SQL Database.
The database is experiencing high CPU consumption.
You need to determine which query uses the most cumulative CPU.
How should you complete the Transact-SQL statement? To answer, drag the appropriate Transact-SQL segments to
the correct locations. Each Transact-SQL segment may be used once, more than one or not at all. You may need to
drag
the split bar between panes or scroll to view content.
Select and Place:
Correct Answer:
Box 1: sys.dm_exec_query_stats sys.dm_exec_query_stats returns aggregate performance statistics for cached query
plans in SQL Server. Box 2: highest_cpu_queries.total_worker_time DESC Sort ontotal_worker_time column
Example:
The following example returns information about the top five queries ranked by average CPU time.
This example aggregates the queries according to their query hash so that logically equivalent queries are grouped by
their cumulative resource consumption.
USE AdventureWorks2012;
GO
SELECT TOP 5 query_stats.query_hash AS “Query Hash”,
SUM(query_stats.total_worker_time) / SUM(query_stats.execution_count) AS “Avg CPU Time”,
MIN(query_stats.statement_text) AS “Statement Text”
FROM
(SELECT QS.*,
SUBSTRING(ST.text, (QS.statement_start_offset/2) + 1,
((CASE statement_end_offset
WHEN -1 THEN DATALENGTH(ST.text)
ELSE QS.statement_end_offset END
-QS.statement_start_offset)/2) + 1) AS statement_text FROM sys.dm_exec_query_stats AS QS CROSS APPLY
sys.dm_exec_sql_text(QS.sql_handle)as ST) as query_stats GROUP BY query_stats.query_hash ORDER BY 2
DESC;
References:
https://msdn.microsoft.com/en-us/library/ms189741.aspx
QUESTION 4
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.
Hot Area:
Correct Answer:
Returning Data by Using OUTPUT Parameters
If you specify the OUTPUT keyword for a parameter in the procedure definition, the stored procedure can return the current value of the parameter to the calling program when the stored procedure exits.
SQL Server stored procedures, views and functions are able to use the WITH ENCRYPTION option to disguise the
contents of a particular procedure or function from discovery.
Native Compilation of Tables and Stored Procedures
In-Memory OLTP introduces the concept of native compilation. SQL Server can natively compile stored procedures that
access memory-optimized tables. SQL Server is also able to natively compile memory-optimized tables. Native
compilation
allows faster data access and more efficient query execution than interpreted (traditional) Transact-SQL. Native
compilation of tables and stored procedures produce DLLs.
References:
https://technet.microsoft.com/en-us/library/ms187004(v=sql.105).aspx
https://msdn.microsoft.com/en-us/library/dn249342.aspx
QUESTION 5
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 answers 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: blog category, blog entry, 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:
The table must reference the ProductID column in the Product table
Existing records in the ProductReview table must not be validated with the Product table.
Deleting records in the Product table must not be allowed if records are referenced by the ProductReview table.
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:
Create new rows in the table without granting INSERT permissions to the table.
Notify the salesperson 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 salespersons 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 modify the environment to meet the requirements for the Orders table.
What should you create?
A. an AFTER UPDATE trigger
B. a user-defined function
C. a stored procedure with output parameters
D. an INSTEAD OF INSERT trigger
Correct Answer: D
From Question: You must modify the Orders table to meet the following requirements: Create new rows in the table
without granting INSERT permissions to the table. Notify the salesperson who places an order whether or not the order
was completed.
References: https://docs.microsoft.com/en-us/sql/t-sql/statements/create-trigger-transact-sql?view=sql-server-2017
QUESTION 6
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:
Limit the values that are accepted by the Salary column.
Prevent salaries less than $15,000 and greater than $300,000 from being entered.
Determine valid values by using logical expressions.
Do not validate data integrity when running DELETE statements.
Solution: You implement a FOR UPDATE trigger on the table.
Does the solution meet the goal?
A. Yes
B. No
Correct Answer: B
References: http://stackoverflow.com/questions/16081582/difference-between-for-update-of-and-for-update
QUESTION 7
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. lock escalation
Correct Answer: A
The Lock: Acquired event class indicates that acquisition of a lock on a resource, such as a data page, has been
achieved.
The Lock: Acquired and Lock: Released event classes can be used to monitor when objects are being locked, the type of
locks taken, and for how long the locks were retained. Locks retained for long periods of time may cause contention issues and should be investigated.
QUESTION 8
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_tran_database_transaction dynamic management view query
C. an Extended Events session that uses Query Editor
D. an Activity Monitor session in Microsoft SQL Management Studio.
Correct Answer: D
References: https://msdn.microsoft.com/en-us/library/hh212951.aspx
QUESTION 9
HOTSPOT
You are performing a code review for Transact-SQL statements.
Which action does the constraint in each statement perform? To answer, select the appropriate options in the answer
area.
NOTE: Each correct selection is worth one point.
Hot Area:
Correct Answer:
QUESTION 10
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
Correct Answer: A
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
QUESTION 11
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
Correct Answer: B
Create a clustered index on the AccountNumber column as it is unique, not a nonnonclustered one.
References: https://msdn.microsoft.com/en-us/library/ms190457.aspx
QUESTION 12
You have a database that contains three encrypted stored 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 them in the correct order.
Select and Place:
Correct Answer:
Note:
Implicit transaction mode remains in effect until the connection executes a SET IMPLICIT_TRANSACTIONS OFF
the statement, which returns the connection to auto-commit mode. In auto-commit mode, individual 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:
Note 2: XACT_STATE returns the following values.
1 The current request 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. A commit 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
QUESTION 13
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:
Limit the values that are accepted by the Salary column.
Prevent salaries less than $15,000 and greater than $300,000 from being entered.
Determine valid values by using logical expressions.
Do not validate data integrity when running DELETE statements.
Solution: You implement a foreign key on the table. Does the solution meet the goal?
A. Yes
B. No
Correct Answer: B
A check constraint is needed.
References: https://en.wikipedia.org/wiki/Check_constraint
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