Cause all that matters here is passing the Microsoft 70-762 exam. Cause all that you need is a high score of 70-762 Developing SQL Databases (beta) exam. The only one thing you need to do is downloading Examcollection 70-762 exam study guides now. We will not let you down with our money-back guarantee.
Q1. 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
Q2. 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
Q3. DRAG DROP
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 the series.
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.
Answer:
Explanation:
In the Products table the SupplierName is dependant on the SupplierID, not on the ProductID.
In the Orders table the ProductName is dependant on the ProductID, not on the OrderID.
Note:
A table is in third normal form when the following conditions are met:
* It is in second normal form.
* All nonprimary fields are dependent on the primarykey.
Second normal form states that it should meet all the rules for First 1Normnal Form and there must be no partial dependences of any of the columns onthe primary key.
First normal form (1NF) sets the very basic rules for an organized database:
* Define the data items required, because they become the columns in a table. Place
related data items in a table.
* Ensure that there are no repeating groups ofdata.
* Ensure that there is a primary key. References:https://www.tutorialspoint.com/sql/third-normal-form.htm
Q4. 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 cascading referential integrity constraints on the table. Does the solution meet the goal?
A. Yes
B. No
Answer: A
Explanation:
References: https://technet.microsoft.com/en-us/library/ms186973(v=sql.105).aspx
Q5. 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 Table1 and Table 2.
You need to allow escalation of Table1 locks to the partition level and prevent all lock escalation for Table2.
Which Transact-SQL statement should you run for each table? To answer, drag the appropriate Transact-SQL 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.
Answer:
Explanation:
Since SQL Server 2008 you can also control how SQL Server performs the Lock Escalation – through the ALTER TABLE statement and the property LOCK_ESCALATION. There are 3 different optionsavailable:
TABLE AUTO DISABLE
Box 1: Table1, Auto
The default option is TABLE, means that SQL Server *always* performs the Lock Escalation to the table level –even when the table is partitioned. If you have your table partitioned, and you want to have aPartition Level Lock Escalation (because you have tested your data access pattern, and you don’t cause deadlocks with it), then you can change the option to AUTO. AUTO means that the Lock Escalation is performed to the partition level, if the table is partitioned, and otherwise to the table level.
Box 2: Table 2, DISABLE
With the option DISABLE you can completely disable the Lock Escalation for that specific table.
For partitioned tables, use the LOCK_ESCALATION option of ALTER TABLE to escalate locks tothe HoBT level instead of the table or to disable lock escalation.
References:http://www.sqlpassion.at/archive/2014/02/25/lock-escalations/
Q6. 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 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 create the Sales Order table
How should you complete the table definition? To answer? select the appropriate Transact- SQL segments in the answer area.
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
Q7. 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
Q8. 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