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DP-300QAs Administering Relational Databases on
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QUESTION 1 You have an Azure SQL database named
DB1. DB1 has a table named Table1 that contains
the following columns.

• You plan to enable Always Encrypted for Table1.
• Which two columns support encryption? Each
  correct answer presents a complete solution.
  NOTE Each correct selection is worth one point
• Column1
• Column2
• Column3
• Column4
• Column5
• Correct Answer DE

• QUESTION 2
• You are creating a new notebook in Azure
  Databricks that will support R as the primary
  language but will also support Scala and SQL.
  Which switch should you use to switch between
  languages?
• \\
• \\
• _at_
• Correct Answer B
• You can override the default language by
  specifying the language magic command at the
  beginning of a cell. The supported magic commands
  are python, r, scala, and sql.

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Reference https//docs.microsoft.com/en-us/azure/
databricks/notebooks/notebooks-use
QUESTION 3 HOTSPOT You have an Azure SQL
Database managed instance named sqldbmi1 that
contains a database name Sales. You need to
initiate a backup of Sales. How should you
complete the Transact-SQL statement? To answer,
select the appropriate options in the answer
area. NOTE Each correct selection is worth one
point. Hot Area
Correct Answer
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Box 1 TO URL \\'https//storage1.blob.core.wind
ows.net/blob1/Sales.bak\\' Native database
backup in Azure SQL Managed Instance. You can
backup any database using standard BACKUP T-SQL
command BACKUP DATABASE tpcc2501 TO URL
\\'https//myacc.blob.core.windows.net/testcontain
er/tpcc2501.bak\\' WITH COPY_ONLY Box 2 WITH
COPY_ONLY Reference https//techcommunity.micro
soft.com/t5/azure-sql-database/native-database-bac
kup-in-azure-sql-managed-instance/ba- p/386154
QUESTION 4 You have an Azure SQL database named
SQL1. You need to implement a disaster recovery
solution for SQL1. The solution must minimize the
following 1. The recovery point objective (RPO)
2.
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• The recovery time objective (RTO)
• 3.
• Administrative effort
• What should you include in the solution?
• Azure Site Recovery
• active geo-replication
• availability groups
• auto-failover groups Correct Answer D
• Overview of business continuity with Azure SQL
  Database and Azure SQL Managed Instance
  auto-failover groups Auto- failover group allows
  the application to automatically recover in case
  of a datacenter outage. Compare geo-replication
  with failover groups Incorrect

QUESTION 5
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HOTSPOT You have an Azure SQL database named DB1
that contains two tables named Table1 and Table2.
Both tables contain a column named a Column1.
Column1 is used for joins by an application named
App1. You need to protect the contents of
Column1 at rest, in transit, and in use. How
should you protect the contents of Column1? To
answer, select the appropriate options in the
answer area. NOTE Each correct selection is
worth one point. Hot Area
Correct Answer
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Explanation Box 1 Column encryption
Key Always Encrypted uses two types of keys
column encryption keys and column master keys. A
column encryption key is used to encrypt data in
an encrypted column. A column master key is a
key-protecting key that encrypts one or
more column encryption keys. Incorrect
Answers TDE encrypts the storage of an entire
database by using a symmetric key called the
Database Encryption Key (DEK). Box 2
Deterministic Always Encrypted is a feature
designed to protect sensitive data, such as
credit card numbers or national identification
numbers (for example, U.S. social security
numbers), stored in Azure SQL Database or SQL
Server databases. Always Encrypted allows
clients to encrypt sensitive data inside client
applications and never reveal the encryption keys
to the Database Engine (SQL Database or SQL
Server). Always Encrypted supports two types of
encryption randomized encryption and
deterministic encryption. Deterministic
encryption always generates the same encrypted
value for any given plain text value. Using
deterministic encryption allows point lookups,
equality joins, grouping and indexing on
encrypted columns. Incorrect Answers 1. Random
ized encryption uses a method that encrypts data
in a less predictable manner. Randomized
encryption is more secure, but prevents
searching, grouping, indexing, and joining on
encrypted columns.
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2. Transparent data encryption (TDE) helps
protect Azure SQL Database, Azure SQL Managed
Instance, and Azure Synapse Analytics against the
threat of malicious offline activity by
encrypting data at rest. It performs real-time
encryption and decryption of the database,
associated backups, and transaction log files at
rest without requiring changes to the
application. Reference https//docs.microsoft.co
m/en-us/sql/relational-databases/security/encrypti
on/always-encrypted-database- engine

• QUESTION 6
• You have an Azure SQL Database server named
  sqlsrv1 that hosts 10 Azure SQL databases. The
  databases perform slower than expected.
• You need to identify whether the performance
  issue relates to the use of tempdb by Azure SQL
  databases on sqlsrv1. What should you do?
• Run Query Store-based queries
• Review information provided by SQL Server
  Profiler-based traces
• Review information provided by Query Performance
  Insight
• Run dynamic management view-based queries Correct
  Answer D
• Microsoft Azure SQL Database and Azure SQL
  Managed Instance enable a subset of dynamic
  management views to diagnose performance
  problems, which might be caused by blocked or
  long-running queries, resource bottlenecks, poor
• query plans, and so on.
• This include edentifying tempdb performance
  issues
• When identifying IO performance issues, the top
  wait types associated with tempdb issues is
  PAGELATCH_ (not PAGEIOLATCH_).
• Reference

QUESTION 7 You have an Azure SOI database named
SQLDb1 that contains the resources shown in the
following table.
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• Column1 contains JSON data.
• You need to compress Column1. The solution must
  minimize the amount of storage used. What should
  you use?
• the COMPRESS()function
• columnstore archive compression
• row compression
• columnstore compression Correct Answer A
• The COMPRESS (Transact-SQL) function compresses
  the input expression, using the GZIP algorithm.
  The function returns a byte array of type
  varbinary(max).
• Syntax COMPRESS ( expression )
• Arguments expression A
• binary(n) char(n) nchar(n) nvarchar(max)
  nvarchar(n) varbinary(max) varbinary(n)
  varchar(max) or
• varchar(n) expression

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Incorrect The max size for a column of type
NVARCHAR(MAX) is 2 GByte of storage. Since
NVARCHAR uses 2 bytes per character, that\\'s
approx. 1 billion characters. A table cannot be
enabled for compression when the maximum row size
plus the compression overhead exceeds the maximum
row size of 8060 bytes. For example, a table that
has the columns c1 CHAR(8000) and c2 CHAR(53)
cannot be compressed because of the additional
compression overhead. Compression has no effect
on Nvarchar columns, except for Page compression.
Reference https//docs.microsoft.com/en-us/sql/t-
sql/functions/compress-transact-sql

• QUESTION 8
• What should you do after a failover of
  SalesSQLDb1 to ensure that the database remains
  accessible to SalesSQLDb1App1?
• Configure SalesSQLDb1 as writable.
• Update the connection strings of SalesSQLDb1App1.
• Update the firewall rules of SalesSQLDb1.
• Update the users in SalesSQLDb1.
• Correct Answer B

• QUESTION 9
• You have 20 Azure SQL databases provisioned by
  using the vCore purchasing model. You plan to
  create an Azure SQL Database elastic pool and add
  the 20 databases.
• Which three metrics should you use to size the
  elastic pool to meet the demands of your
  workload? Each correct answer presents part of
  the solution.
• NOTE Each correct selection is worth one point.
• total size of all the databases
• geo-replication support
• number of concurrently peaking databases peak
  CPU utilization per database
• maximum number of concurrent sessions for all the
  databases
• total number of databases average CPU
  utilization per database

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Correct Answer ACE CE Estimate the vCores
needed for the pool as follows For vCore-based
purchasing model MAX(,
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