70-762 | Certified 70-762 Exam Questions and Answers 2019

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NEW QUESTION 1
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 reporting database that includes a non-partitioned fact table named Fact_Sales. The table is persisted on disk.
Users report that their queries take a long time to complete. The system administrator reports that the table takes too much space in the database. You observe that there are no indexes defined on the table, and many columns have repeating values.
You need to create the most efficient index on the table, minimize disk storage and improve reporting query performance.
What should you do?

  • A. Create a clustered indexon the table.
  • B. Create a nonclustered index on the table.
  • C. Create a nonclustered filtered index on the table.
  • D. Create a clustered columnstore index on the table.
  • E. Create a nonclustered columnstore index on the table.
  • F. Create a hash index on thetable.

Answer: D

Explanation: The columnstore index is the standard for storing and querying large data warehousing fact tables. It uses column-based data storage and query processing to achieve up to 10x query performance gains in your data warehouse over traditional row-oriented storage, and up to 10x data compression over the uncompressed data size.
A clustered columnstore index is the physical storage for the entire table.

NEW QUESTION 2
You have a database named Sales.
You need to create a table named Customer that includes the columns described in the following table:
70-762 dumps exhibit
How should you complete the Transact SQL statement? To answer, select the appropriate Transact-SQL segments in the answer area.
70-762 dumps exhibit

    Answer:

    Explanation: Box 1: MASKED WITH (FUNCTION ='default()')
    The Defualt masking method provides full masking according to the data types of the designated fields. Example column definition syntax: Phone# varchar(12) MASKED WITH (FUNCTION = 'default()') NULL Box 2: MASKED WITH (FUNCTION ='partial(3,"XXXXXX",0)')
    The Custom String Masking method exposes the first and last letters and adds a custom padding string in the middle. prefix,[padding],suffix
    examples:
    PhoneNumber varchar(10) MASKED WITH (FUNCTION = 'partial(5,"XXXXXXX",0)') Box 3: MASKED WITH (FUNCTION ='email()')
    The Email masking method which exposes the first letter of an email address and the constant suffix ".com", in the form of an email address. .aXXX@XXXX.com.
    Example definition syntax: Email varchar(100) MASKEDWITH (FUNCTION = 'email()') NULL References: https://msdn.microsoft.com/en-us/library/mt130841.aspx

    NEW QUESTION 3
    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 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 the SQL Server instances in real time and optimize the server to maximize throughput, response time, and overall SQL performance.
    You need to examine delays in executed threads, including errors with specific queries and batches.

    • 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 ays .dm_os_memory_objeccs query.
    • E. Create a sp_configure 'max server memory' query.

    Answer: B

    NEW QUESTION 4
    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 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.
    70-762 dumps exhibit
    You plan to create a view named Website.Customer and a view named Sales.FemaleCustomers. Website.Customer must meet the following requirements:
    * Allow users access to the CustomerName and CustomerNumber columns for active customers.
    * Allow changes to the columns that the view references. Modified data must be visible through the view.
    * Prevent the view from being published as part of Microsoft SQL Server replication. Sales.Female.Customers must meet the following requirements:
    * Allow users access to the CustomerName, Address, City, State and PostalCode columns.
    * Prevent changes to the columns that the view references.
    * 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:
    You run the uspUpdateCustomerSummary stored procedure to make changes to customer account summaries. Other stored procedures call the spDeleteCustAcctRelationship to delete records from the CustomerToAccountBridge table.
    When you start uspUpdateCustomerSummary, there are no active transactions. The procedure fails at line 09 due to a CHECK constraint violation on the TotalDepositAccountCount column.
    What is the impact of the stored procedure on the CustomerDetails table?

    • A. The value of the TotalAccountCount column decreased.
    • B. The value of the TotalDepositAccountCount column is not changed.
    • C. The statement that modifies TotalDepositAccountCount is excluded from the transaction.
    • D. The value of the TotalAccountCount column is not changed.

    Answer: D

    NEW QUESTION 5
    You have a data warehouse fact table that has a clustered columnstore index. You have multiple CSV files that contain a total of 3 million rows of data.
    You need to upload the data to the fact table. The solution must avoid the delta group when you import the data.
    Which solution will achieve the goal in the least amount of time?

    • A. Load the source data to a staging tabl
    • B. Load the data to the fact table by using the insert_select statement and specify the Tablock option on the staging table.
    • C. Load the source data to a staging table that has a clustered index on the primary ke
    • D. Copy the data to the fact table by using the insert_select statement.
    • E. Load the source data to the fact table by running bcp.exe and specify the _ Tablock option.
    • F. Load the source data to the fact table by using the bulk insert statement and specify the Tablock option.

    Answer: D

    NEW QUESTION 6
    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 the SQL Server instances in real time and optimize the server to maximize throughput, response time, and overall SQL performance.
    What should you do?

    • A. Create asys.dm_os_waiting_tasks query.
    • B. Create a sys.dm_exec_sessions query.
    • C. Create aPerformance 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: B

    Explanation: sys.dm_exec_sessions returns one row per authenticated session on SQL Server. sys.dm_exec_sessions is a server-scope view that shows information about all active user connections and internal tasks. This information includes client version, client program name, client login time, login user, current session setting, and more. Use sys.dm_exec_sessions to first view the current system load and to identify a session of interest, and then learn more information about that session by using other dynamic management views or dynamic management functions.
    Examples of use include finding long-running cursors, and finding idle sessions that have open transactions.

    NEW QUESTION 7
    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 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:
    70-762 dumps exhibit
    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.
    70-762 dumps exhibit
    You plan to create a view named Website.Customer and a view named Sales.FemaleCustomers. Website.Customer must meet the following requirements:
    * Allow users access to the CustomerName and CustomerNumber columns for active customers.
    * Allow changes to the columns that the view references. Modified data must be visible through the view.
    * Prevent the view from being published as part of Microsoft SQL Server replication. Sales.Female.Customers must meet the following requirements:
    * Allow users access to the CustomerName, Address, City, State and PostalCode columns.
    * Prevent changes to the columns that the view references.
    * 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 Transact-SQL statement:
    70-762 dumps exhibit
    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.
    You need to create Website Customer.
    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.
    NOTE: Each correct selection is worth one point. NOTE: Each correct selection is worth one point.
    70-762 dumps exhibit

      Answer:

      Explanation: Box 1: WITH ENCRYPTION
      Using WITH ENCRYPTION prevents the view from being published as part of SQL Server replication. Box 2: WITH CHECK OPTION
      CHECK OPTION forces all data modification statements executed against theview 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: Website.Customer must meet the followingrequirements:

      NEW QUESTION 8
      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.
      The Account table was created by using the following Transact-SQL statement:
      70-762 dumps exhibit
      There are more than 1 billion records in the Account table. The AccountNuwber 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:
      SELECT ProductCode, SUM(Balance) AS TotalSUH FROM Account WHERE ProductCode <> 'CD' GROUP 8Y ProductCode; SELECT AccountNupber, Balance FROM Account WHERE ProductCode - 'CD";
      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 statements:
      70-762 dumps exhibit
      Does the solution meet the goal?

      • A. Yes
      • B. No

      Answer: A

      NEW QUESTION 9
      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.
      70-762 dumps exhibit
      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.
      Changes to the price of any product must be less a 25 percent increase from the current price. The shipping department must be notified about order and shipping details when an order is entered into the database.
      You need to implement the appropriate table objects.
      Which object should you use for each table? To answer, drag the appropriate objects to the correct tables. Each object 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.
      70-762 dumps exhibit

        Answer:

        Explanation: The Products table needs a primary key constraint on the ProductID field.
        The Orders table needs a foreign key constraint on the ProductID field, with a reference to the ProductID field in the Products table.

        NEW QUESTION 10
        You have a trigger named CheckTriggerCreation that runs when a user attempts to create a trigger. 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.
        70-762 dumps exhibit

          Answer:

          Explanation: 70-762 dumps exhibit

          NEW QUESTION 11
          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 table that has a clustered index and a nonclustered index. The indexes use different columns from the table. You have a query named Query1 that uses the nonclustered index.
          Users report that Query1 takes a long time to report results. You run Query1 and review the following statistics for an index seek operation:
          70-762 dumps exhibit
          You need to resolve the performance issue. Solution: You drop the nonclustered index. Does the solution meet the goal?

          • A. Yes
          • B. No

          Answer: B

          Explanation: We see Actual Number of Row is 3571454, while Estimated Number of Rows is 0. This indicates that the statistics are old, and need to be updated.

          NEW QUESTION 12
          You have a database named MyDatabase. You must monitor all the execution plans in XML format by using Microsoft SQL Trace. The trace must meet the following requirements:
          - Capture execution plans only for queries that run the MyDatabase database.
          - Filter out plans with event duration of less than or equal to 100 microseconds.
          - Save trace results to a disk on the server. You need to create the trace.
          In which order should you arrange the Transact-SQL segments to develop the solution? To answer, move all Transact-SQL segments to the answer area and arrange them in the correct order.
          NOTE: More than one order of answer choices is correct. You will receive credit for any of the correct orders you select.
          DECLARE @traceEventId int = 122;
          DECLARE @traceColumnIdForTextData int = 1; DECLARE @durationFilter bigint = 100 DECLARE @databaseID int;
          SELECT @databaseId = DB_ID(‘MyDatabase’);
          70-762 dumps exhibit

            Answer:

            Explanation: The following system stored procedures are used to define and manage traces:
            * sp_trace_create is used to define a trace and specify an output file location as well asother options that I’ll cover in the coming pages. This stored procedure returns a handle to the created trace, in the form of an integer trace ID.
            * sp_trace_setevent is used to add event/column combinations to traces based on the trace ID, as well as toremove them, if necessary, from traces in which they have already been defined.
            * sp_trace_setfilter is used to define event filters based on trace columns.
            * sp_trace_setstatus is called to turn on a trace, to stop a trace, and to delete a trace definitiononce you’re done with it. Traces can be started and stopped multiple times over their lifespan.
            References: https://msdn.microsoft.com/en-us/library/cc293613.aspx

            NEW QUESTION 13
            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:
            70-762 dumps exhibit
            Does the solution meet the goal?

            • A. Yes
            • B. No

            Answer: B

            Explanation: datetime2 defines adate that is combined with a time of day that is based on 24-hour clock. datetime2 can be considered as an extension of the existing datetime type that has a larger date range, a larger default fractional precision, andoptional user-specified precision.
            References: https://msdn.microsoft.com/en-us/library/bb677335.aspx

            NEW QUESTION 14
            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.
            70-762 dumps exhibit

              Answer:

              Explanation: Read Uncommitted (aka dirty read): A transaction T1executing under this isolation level can access data changed by concurrent transaction(s).
              Pros:No read locks needed to read data (i.e. no reader/writer blocking). Note, T1 still takes transaction duration locks for any data modified.
              Cons: Data is not guaranteed to be transactionally consistent.
              Read Committed: A transaction T1 executing under this isolation level can only access committed data. Pros: Good compromise between concurrency and consistency.
              Cons: Locking and blocking. The data can change when accessed multiple times within the same transaction.
              Repeatable Read: A transaction T1 executing under this isolation level can only access committed data with an additional guarantee that any data read cannot change (i.e. it is repeatable) for the duration of the transaction.
              Pros: Higher data consistency.
              Cons: Locking and blocking. The S locks are held for the duration of the transaction that can lower the concurrency. It does not protect against phantom rows.
              Serializable: A transaction T1 executing under this isolation level provides the highest data consistency including elimination of phantoms but at the cost of reduced concurrency. It prevents phantoms by taking a range lock or table level lock if range lock can’t be acquired (i.e. no index on the predicate column) for the duration of the transaction.
              Pros: Full data consistency including phantom protection.
              Cons: Locking and blocking. The S locks are held for the duration of the transaction that can lower the concurrency.
              References:
              https://blogs.msdn.microsoft.com/sqlcat/2011/02/20/concurrency-series-basics-of-transaction-isolation-levels/

              NEW QUESTION 15
              You maintain a Microsoft Azure SQL Database instance.
              You grant User1 the SELECT and EXECUTE permissions for all objects in the dbo schema. You must create a stored procedure that allows User1 to view the following information:
              details for each connection to the database
              a list of all active user connections and internal tasks
              You need to create the stored procedure for User1 and ensure that User1 can run the stored procedure without any error.
              How should you complete the Transact-SQL statements? 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.
              NOTE: More than one combination of answer choices is correct. You will receive credit for any of the correct combinations you select.
              70-762 dumps exhibit

                Answer:

                Explanation: Box 1: Sys.dm_exec_connections
                Sys.dm_exec_connections returns information about the connections established to this instance of SQL Server and the details of each connection. Returns server wide connection information for SQL Server. Returns current database connection information for SQL Database.
                Box 2: sys.dm_exec_sessions
                sys.dm_exec_sessions returns one row per authenticated session on SQL Server. sys.dm_exec_sessions is a server-scope view that shows information about all active user connections and internal tasks.
                Box 3: GRANT VIEW DATABASE STATE To User1
                SQL Database: Requires VIEW DATABASE STATE to see all connections to the current database. VIEW DATABASE STATE cannot be granted in the master database.

                NEW QUESTION 16
                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 update the application to use implicit transactions when connecting to the database. Does the solution meet the goal?

                • A. Yes
                • B. No

                Answer: B

                Explanation: References:
                http://sqltouch.blogspot.co.za/2013/05/writelog-waittype-implicit-vs-explicit.html

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