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Online 70-762 free questions and answers of New Version:

NEW QUESTION 1
You are planning a set of stored procedures that must be able to access memory-optimized tables. You need to optimize the performance of the stored procedures. Which statement should you include in the stored procedure definitions?

  • A. WITH RECOMPILE
  • B. WITH NATIV£_COMPILATION
  • C. WITH EXECUTE AS SELF
  • D. WITM NO INFOMSG5

Answer: D

NEW QUESTION 2
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 3
    You need to build a function that meets the following requirements:
    How should you complete the Transact-SQL statement? To answer, drag the appropriate Transact-SQL statements 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.
    70-762 dumps exhibit

      Answer:

      Explanation: References: https://technet.microsoft.com/en-us/library/ms189294(v=sql.105).aspx

      NEW QUESTION 4
      You are developing queries and stored procedures to support a line-of-business application. You need to use the appropriate isolation level based on the scenario.
      Which isolation levels should you implement? To answer, select the appropriate isolation level for each scenario in the answer area. Each isolation level may be used only once.
      NOTE: Each correct selection is worth one point.
      70-762 dumps exhibit

        Answer:

        Explanation: Box 1: READ UNCOMMITTED
        Transactions running at the READ UNCOMMITTED level do not issue shared locks to prevent other transactions from modifying data read by the current transaction. READ UNCOMMITTED transactions are also not blocked by exclusive locks that would prevent the current transaction from reading rows that have been modified but not committed by other transactions. When this option is set, it is possible to read uncommitted modifications, which are called dirty reads. Values in the data can be changed and rows can appear or disappear in the data set before the end of the transaction.
        Box 2: READ COMMITTED
        READ COMMITTED specifies that statements cannot read data that has been modified but not committed by other transactions.
        SERIALIZABLE specifies that statements cannot read data that has been modified but not yet committed by other transactions.
        Box 3: REPEATABLE READ
        REPEATABLE READ specifies that statements cannot read data that has been modified but not yet committed by other transactions and that no other transactions can modify data that has been read by the current transaction until the current transaction completes.
        Box 4: SNAPSHOT
        If READ_COMMITTED_SNAPSHOT is set to ON, the Database Engine uses row versioning to present each statement with a transactionally consistent snapshot of the data as it existed at the start of the statement.
        References:
        https://docs.microsoft.com/en-us/sql/t-sql/statements/set-transaction-isolation-level-transact-sql?view=sql-server

        NEW QUESTION 5
        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 and application to track customer sales.
        You need to create an object that meets the following requirements:
        - Run managed code packaged in an assembly that was created in the Microsoft.NET Framework and uploaded in Microsoft SQL Server.
        - Run written a transaction and roll back if a future occurs.
        - Run when a table is created or modified. What should you create?

        • A. extended procedure
        • B. CLR procedure
        • C. user-defined procedure
        • D. DML trigger
        • E. scalar-valued function
        • F. table-valued function
        • G. DDL trigger

        Answer: B

        Explanation: The common language runtime (CLR) is the heart of the Microsoft .NET Framework and provides the execution environment for all .NET Framework code. Code that runs within the CLR is referred to as managed code.
        With the CLR hosted in Microsoft SQL Server (called CLR integration), you can author stored procedures, triggers, user-defined functions, user-defined types, and user-defined aggregates in managed code. Because managed code compiles to native code prior to execution, you can achieve significant performance increases in some scenarios.

        NEW QUESTION 6
        You have several real-time applications that constantly update data in a database. The applications run more than 400 transactions per second that insert and update new metrics from sensors.
        A new web dashboard is released to present the data from the sensors. Engineers report that the applications take longer than expected to commit updates.
        You need to change the dashboard queries to improve concurrency and to support reading uncommitted data. What should you do?

        • A. Use the NOLOCK option.
        • B. Execute the DBCC UPDATEUSAGE statement.
        • C. Use the max worker threads Option.
        • D. Use a table-valued parameter.
        • E. Set SET ALLOW SNAPSHOT ISOLATION to ON.
        • F. Set SET XACTJVBORT to ON.
        • G. Execute the alter table ti set (Lock_ESCALATION = auto); statement.
        • H. Use the output parameters.

        Answer: C

        NEW QUESTION 7
        You create a database table named FactSales by running the following Transact-SQL statements:
        70-762 dumps exhibit
        You must optimize the indexes without making changes to the ix_FactSales_EmployeeKey index. You need to implement a columnstore index for the table.
        How should you complete the Transact-SQL code? To answer, select the appropriate Transact-SQL segments in the answer area.
        NOTE: Each correct selection is worth one point.
        70-762 dumps exhibit

          Answer:

          Explanation: 70-762 dumps exhibit

          NEW QUESTION 8
          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.
          70-762 dumps exhibit

            Answer:

            Explanation: Box 1: Readcommitted
            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. Box 2: Read Uncommitted
            Read Uncommitted (aka dirty read): A transaction T1 executing 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. Box 3: Serializable
            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 9
            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 10
            You use Microsoft SQL Server Profile to evaluate a query named Query1. The Profiler report indicates the following issues:
            At each level of the query plan, a low total number of rows are processed.
            The query uses many operations. This results in a high overall cost for the query. You need to identify the information that will be useful for the optimizer.
            What should you do?

            • A. Start a SQL Server Profiler trace for the event class Performance statistics in the Performance eventcategory.
            • B. Create one Extended Events session with the sqlserver.missing_column_statistics event added.
            • C. Start a SQL Server Profiler trace for the event class Soft Warnings in the Errors and Warnings event category.
            • D. Create one Extended Events session with the sqlserver.error_reported event added.

            Answer: A

            Explanation: The Performance Statistics event class can be used to monitor the performance of queries, stored procedures, and triggers that are executing. Each of the six event subclasses indicates an event in the lifetime of queries, stored procedures, and triggers within the system. Using the combination of these event subclasses and the associated sys.dm_exec_query_stats, sys.dm_exec_procedure_stats and sys.dm_exec_trigger_stats dynamic management views, you can reconstitute the performance history of any given query, stored procedure, or trigger.
            References:
            https://docs.microsoft.com/en-us/sql/relational-databases/event-classes/performance-statistics-event-class?view=

            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

            NEW QUESTION 12
            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.

            Answer: D

            Explanation: References: https://msdn.microsoft.com/en-us/library/hh212951.aspx

            NEW QUESTION 13
            You have a Microsoft SQL Server database that has a table named Sales. The table is used for retrieving data and is updated during non business hours.
            You run the following Transact-SQL statement:
            70-762 dumps exhibit
            You analyze the execution plan for the statement. (Click the Exhibit button).
            70-762 dumps exhibit
            You need to add an index that optimizes performance. How should you complete the Transact-SQL statement?
            70-762 dumps exhibit

              Answer:

              Explanation: 70-762 dumps exhibit

              NEW QUESTION 14
              You are designing a stored procedure for a database named obi.
              The following requirements must be met during the entire execution of the stored procedure:
              *The stored procedure must only read changes that are persisted to the database.
              *select statements within the stored procedure should only show changes to the data that are made by the stored procedure
              You need to configure the transaction isolation level for the stored procedure. Which Transact-SQL statement or statements should you run?
              A)
              70-762 dumps exhibit
              B)
              70-762 dumps exhibit
              C)
              70-762 dumps exhibit
              D)
              70-762 dumps exhibit

              • A. Option A
              • B. Option B
              • C. Option C
              • D. Option D

              Answer: A

              NEW QUESTION 15
              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:
              - Runs within a single transaction.
              - Commits updates to the Customer and CustomerInfo tables regardless of the status of updates to the OrderHeader and OrderDetail tables.
              - Commits changes to all four tables when updates to all four tables are successful. Solution: You create a stored procedure that includes the following Transact-SQL segment:
              70-762 dumps exhibit
              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

              NEW QUESTION 16
              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:
              70-762 dumps exhibit
              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 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 create the Sales Order table
              How should you complete the table definition? To answer? select the appropriate Transact-SQL segments in the answer area.
              70-762 dumps exhibit

                Answer:

                Explanation: Box 1: NONCLUSTERED HASHWITH (BUCKET_COUNT = 10000000)
                Hash index is preferable over a nonclustered index when queries test the indexed columns by use of a WHERE clause with an exact equality on all index key columns. We should use a bucket count of 10 million.
                Box 2: SCHEMA_ONLY
                Durability: The value of SCHEMA_AND_DATA indicates that the table is durable, meaning that changes are persisted on disk and survive restart or failover. SCHEMA_AND_DATA is the default value.
                The value of SCHEMA_ONLY indicates that the table is non-durable. The table schema is persisted but any data updates are not persisted upon a restart or failover of the database. DURABILITY=SCHEMA_ONLY is only allowed with MEMORY_OPTIMIZED=ON.
                References: https://msdn.microsoft.com/en-us/library/mt670614.aspx

                NEW QUESTION 17
                Your company runs end-of-the-month accounting reports. While the reports run. other financial records are updated in the database.
                Users report that the reports take longer than expected to run.
                You need to reduce the amount of time it takes for the reports to run. The reports must show committed data only.
                What should you do?

                • A. Use the NOLOCK option.
                • B. Execute the BDCC UPDATEUSAGE statement.
                • C. Use the max worker threads Option.
                • D. Use a table-valued parameter.
                • E. Set SET ALLOW_SNAPSHOI_ISOLATION to OH.
                • F. Set SET XACT ABORT to ON.
                • G. Execute the alter table ti set (Lock_ESCALATION = AUTO); statement.
                • H. Use the output parameters.

                Answer: G

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