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70-762 - Developing SQL Databases - Dump Information

Vendor : Microsoft
Exam Code : 70-762
Exam Name : Developing SQL Databases
Questions and Answers : 85 Q & A
Updated On : August 17, 2017
PDF Download Mirror : 70-762 Brain Dump
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70-762 Questions and Answers

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QUESTION: 81

You have a database named DB1. There is no memory-optimized file group in the database. You have a table and a stored procedure that were created by running the following Transact-SOL statements:


image


The Employee table is persisted on disk. You add 2,000 records to the Employee table. You need to create an index that meets the following requirements:

What should you do?


  1. Create a clustered index on the table.

  2. Create a nonclustered index on the table.

  3. Create a nonclustered filtered index on the table.

  4. Create a clustered column store index on the table.

  5. Create a nonclustered column store index on the table.

  6. Create a hash index on the table.


Answer: B


QUESTION: 82 DRAG DROP

Case Study 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:


image

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: Both of the stored procedures experience blocking issues.

UspB must not abort if UspA commits changes to a row before UspB commits changes to the same row. UspA must not abort if UspB commits changes to a row before UspA commits changes to the same row. Exhibit


image


You need to specify the transaction isolation levels to enable row versioning.

How should you complete the Transact-SQL statements? To answer, drag the 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.


image


Answer:


image


QUESTION: 83

HOTSPOT 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-SOL statements to create, configure, and populate the Employee table:


image


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: Users must only be able to modify data in the Employee table by using the vwEmployee view. You must prevent users from viewing the view definition in catalog views. You need to identify the view attribute to use when creating vwEmployee. Exhibit


image

In the table below, identify the attributes that you must use. NOTE: Make only one selection in each column.


image


Answer:


image


QUESTION: 84

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-SOL statements to create, configure, and populate the Employee table:


image


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: 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. Exhibit


image

What should you do?


  1. Update the transaction level of the report query session to READPAST.

  2. Modify the report queries to use the UNION statement to combine the results of two or more queries.

  3. Set the READ_COMMITTED_SNAPSHOT database option to ON.

  4. Update the transaction level of the report query session to READ UNCOMMITTED.


Answer: C


QUESTION: 85

HOTSPOT 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-SOL statements to create, configure, and populate the Employee table:


image

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: You view the Deadlock Graph as shown in the exhibit. (Click the Exhibit button .)

image


Use the drop-down menus to select the answer choice that answers each question based on the information presented in the graphic.

NOTE: Each correct selection is worth one point.


image


Answer:


image


Microsoft 70-762 Exam (Developing SQL Databases) Detailed Information

70-762 - Developing SQL Databases


70-762 Test Objectives


Design and implement database objects (25–30%)
  • Design and implement a relational database schema
    • Design tables and schemas based on business requirements, improve the design of tables by using normalization, write table create statements, determine the most efficient data types to use

  • Design and implement indexes
    • Design new indexes based on provided tables, queries, or plans; distinguish between indexed columns and included columns; implement clustered index columns by using best practices; recommend new indexes based on query plans

  • Design and implement views
    • Design a view structure to select data based on user or business requirements, identify the steps necessary to design an updateable view, implement partitioned views, implement indexed views

  • Implement columnstore indexes
    • Determine use cases that support the use of columnstore indexes, identify proper usage of clustered and non-clustered columnstore indexes, design standard non-clustered indexes in conjunction with clustered columnstore indexes, implement columnstore index maintenance
Implement programmability objects (20–25%)
  • Ensure data integrity with constraints
    • Define table and foreign key constraints to enforce business rules, write Transact-SQL statements to add constraints to tables, identify results of Data Manipulation Language (DML) statements given existing tables and constraints, identify proper usage of PRIMARY KEY constraints

  • Create stored procedures
    • Design stored procedure components and structure based on business requirements, implement input and output parameters, implement table-valued parameters, implement return codes, streamline existing stored procedure logic, implement error handling and transaction control logic within stored procedures

  • Create triggers and user-defined functions
    • Design trigger logic based on business requirements; determine when to use Data Manipulation Language (DML) triggers, Data Definition Language (DDL) triggers, or logon triggers; recognize results based on execution of AFTER or INSTEAD OF triggers; design scalar-valued and table-valued user-defined functions based on business requirements; identify differences between deterministic and non-deterministic functions
Manage database concurrency (25–30%)
  • Implement transactions
    • Identify DML statement results based on transaction behavior, recognize differences between and identify usage of explicit and implicit transactions, implement savepoints within transactions, determine the role of transactions in high-concurrency databases

  • Manage isolation levels
    • Identify differences between Read Uncommitted, Read Committed, Repeatable Read, Serializable, and Snapshot isolation levels; define results of concurrent queries based on isolation level; identify the resource and performance impact of given isolation levels

  • Optimize concurrency and locking behavior
    • Troubleshoot locking issues, identify lock escalation behaviors, capture and analyze deadlock graphs, identify ways to remediate deadlocks

  • Implement memory-optimized tables and native stored procedures
    • Define use cases for memory-optimized tables versus traditional disk-based tables, optimize performance of in-memory tables by changing durability settings, determine best case usage scenarios for natively compiled stored procedures, enable collection of execution statistics for natively compiled stored procedures
Optimize database objects and SQL infrastructure (20–25%)
  • Optimize statistics and indexes
    • Determine the accuracy of statistics and the associated impact to query plans and performance, design statistics maintenance tasks, use dynamic management objects to review current index usage and identify missing indexes, consolidate overlapping indexes

  • Analyze and troubleshoot query plans
    • Capture query plans using extended events and traces, identify poorly performing query plan operators, create efficient query plans using Query Store, compare estimated and actual query plans and related metadata, configure Azure SQL Database Performance Insight

  • Manage performance for database instances
    • Manage database workload in SQL Server; design and implement Elastic Scale for Azure SQL Database; select an appropriate service tier or edition; optimize database file and tempdb configuration; optimize memory configuration; monitor and diagnose scheduling and wait statistics using dynamic management objects; troubleshoot and analyze storage, IO, and cache issues; monitor Azure SQL Database query plans

  • Monitor and trace SQL Server baseline performance metrics
    • Monitor operating system and SQL Server performance metrics; compare baseline metrics to observed metrics while troubleshooting performance issues; identify differences between performance monitoring and logging tools, such as perfmon and dynamic management objects; monitor Azure SQL Database performance; determine best practice use cases for extended events; distinguish between Extended Events targets; compare the impact of Extended Events and SQL Trace; define differences between Extended Events Packages, Targets, Actions, and Sessions



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