Administering Microsoft Azure SQL Solutions DP-300 Practice Test 80
Question 790
What failure mode is MOST relevant if an administrator ignores this situation: A multi-tenant system has several independent Azure SQL databases but wants one regional failover policy?
- Claiming an RPO of zero from asynchronous replication alone can misstate the achievable guarantee
- Configuring unrelated independent DNS records does not guarantee coordinated application recovery
- Planning read-only reporting against backup storage rather than a replica will fail
- Assuming Azure SQL Database native failover groups apply to arbitrary on-premises SQL instances is incorrect
Explanation
Correct Answer
B:Configuring unrelated independent DNS records does not guarantee coordinated application recovery. This concern directly arises because failover groups can coordinate failover for multiple eligible databases and expose listener endpoints. The appropriate remediation is to assess a failover group for compatible databases under a reviewed recovery design. A successful control check would show that the failover policy covers all approved member databases and connection routing tests pass.
Incorrect Answers
A:Claiming an RPO of zero from asynchronous replication alone can misstate the achievable guarantee can matter in a separate case, such as when a regional disaster recovery plan promises zero data loss using asynchronous geo-replication. In this question, the principal consequence is that configuring unrelated independent DNS records does not guarantee coordinated application recovery. That different risk does not best characterize the missing control in the given scenario.
C:Planning read-only reporting against backup storage rather than a replica will fail can matter in a separate case, such as when a development team confuses a geo-redundant backup with a hot readable secondary in Azure SQL. In this question, the principal consequence is that configuring unrelated independent DNS records does not guarantee coordinated application recovery. That different risk does not best characterize the missing control in the given scenario.
D:Assuming Azure SQL Database native failover groups apply to arbitrary on-premises SQL instances is incorrect can matter in a separate case, such as when a bank operates on-premises SQL Server with an Azure virtual machine as disaster recovery. In this question, the principal consequence is that configuring unrelated independent DNS records does not guarantee coordinated application recovery. That different risk does not best characterize the missing control in the given scenario.
Question 791
For the requirement "A DBA needs to examine long-lived SQL blocking chains during a workload spike", the proposed remediation is "Capture blocking sessions and waits with approved diagnostic tooling". Which result BEST demonstrates success?
- A synthetic threshold test creates the expected alert and on-call notification
- A query retrieves historical resource measurements through the required retention window
- The blocked request and lock holder are identified along with the originating transaction
- A controlled deadlock produces a captured event with identifying session information
Explanation
Correct Answer
C:The blocked request and lock holder are identified along with the originating transaction. This observation tests the actual effect of capture blocking sessions and waits with approved diagnostic tooling instead of assuming that a configuration change alone was successful. The underlying database behavior is that session and wait telemetry can identify which transaction holds locks blocking others. The control matters because restarting the SQL instance before recording evidence destroys the active blocking context.
Incorrect Answers
A:A synthetic threshold test creates the expected alert and on-call notification could validate a separate fix, for example when a Managed Instance team needs alerts when storage space approaches a configured ceiling. Here the required proof is that the blocked request and lock holder are identified along with the originating transaction. The alternative tests another database behavior and cannot establish whether the stated issue was corrected.
B:A query retrieves historical resource measurements through the required retention window could validate a separate fix, for example when a DBA requests 30 days of historical performance for a database whose current dashboard shows only a week. Here the required proof is that the blocked request and lock holder are identified along with the originating transaction. The alternative tests another database behavior and cannot establish whether the stated issue was corrected.
D:A controlled deadlock produces a captured event with identifying session information could validate a separate fix, for example when a production SQL Server VM needs lightweight detailed event capture for intermittent deadlocks. Here the required proof is that the blocked request and lock holder are identified along with the originating transaction. The alternative tests another database behavior and cannot establish whether the stated issue was corrected.
Question 792
The team plans to Replicate or configure target-side login and security dependencies appropriately and test end-to-end in response to "A failover group between Azure SQL Regions remains healthy but application logins fail after an actual failover". Which technical principle BEST explains this approach?
- Synchronous commit trades write acknowledgment latency for reduced local data loss while async suits remote distance
- Failover Cluster Instances require storage reachable by the current active cluster node
- HA telemetry describes database replica state but not necessarily successful business operations
- Database geo-replication alone does not guarantee every external authentication dependency is available
Explanation
Correct Answer
D:Database geo-replication alone does not guarantee every external authentication dependency is available. This is the mechanism that makes the proposed change, replicate or configure target-side login and security dependencies appropriately and test end-to-end, appropriate to the database environment described. The key limitation is that assuming network redirection moves all server-level identity configuration can interrupt clients. A concrete confirmation is that the recovered application authenticates and runs its business queries after regional switchover.
Incorrect Answers
A:Synchronous commit trades write acknowledgment latency for reduced local data loss while async suits remote distance is a valid distinction for a different database situation, for example when an on-premises SQL Server AG requires synchronous local replicas but uses a distant remote region for disaster recovery. Here the determining mechanism is that database geo-replication alone does not guarantee every external authentication dependency is available. The alternative does not explain why the selected solution addresses this requirement.
B:Failover Cluster Instances require storage reachable by the current active cluster node is a valid distinction for a different database situation, for example when a SQL Server VM FCI stops during cluster failover because shared storage is unavailable on the survivor. Here the determining mechanism is that database geo-replication alone does not guarantee every external authentication dependency is available. The alternative does not explain why the selected solution addresses this requirement.
C:HA telemetry describes database replica state but not necessarily successful business operations is a valid distinction for a different database situation, for example when an availability group monitor shows synchronized state but business application transactions remain blocked. Here the determining mechanism is that database geo-replication alone does not guarantee every external authentication dependency is available. The alternative does not explain why the selected solution addresses this requirement.
Question 793
An Azure SQL review identifies this gap: A financial ledger requires tamper-evidence for important historical business transactions. Which consequence BEST explains why it must be addressed?
- Ordinary SQL audit tables without verifiable digests can be modified without detection
- Enabling change tracking alone does not automatically store every old column value
- Leaving personal columns unclassified can prevent appropriate audit prioritization
- A configured audit toggle alone does not prove that relevant SQL activity was stored
Explanation
Correct Answer
A:Ordinary SQL audit tables without verifiable digests can be modified without detection. This concern directly arises because sQL ledger offers cryptographic tamper-evidence for supported data history and operations. The appropriate remediation is to evaluate ledger-enabled tables and verification digest processes. A successful control check would show that a verified ledger digest detects an intentionally tampered test history record.
Incorrect Answers
B:Enabling change tracking alone does not automatically store every old column value can matter in a separate case, such as when a compliance report needs to identify which customer fields changed between two audit periods. In this question, the principal consequence is that ordinary SQL audit tables without verifiable digests can be modified without detection. That different risk does not best characterize the missing control in the given scenario.
C:Leaving personal columns unclassified can prevent appropriate audit prioritization can matter in a separate case, such as when an auditor needs a catalog of columns containing personal identifiers across an Azure SQL estate. In this question, the principal consequence is that ordinary SQL audit tables without verifiable digests can be modified without detection. That different risk does not best characterize the missing control in the given scenario.
D:A configured audit toggle alone does not prove that relevant SQL activity was stored can matter in a separate case, such as when a security dashboard shows Azure SQL auditing enabled but no events arrive at its target storage. In this question, the principal consequence is that ordinary SQL audit tables without verifiable digests can be modified without detection. That different risk does not best characterize the missing control in the given scenario.
Question 794
Following an approved fix for "An order database must retain current and historical partitions without changing business queries", what observation BEST confirms that it works?
- A usage report confirms allowed idle pauses without unacceptable active-workload delay
- A test query and partition-switch procedure access only appropriate ranges
- A rehearsal switches a complete history partition under expected operational limits
- Disk queue and write latency measurements improve after the reviewed storage adjustment
Explanation
Correct Answer
B:A test query and partition-switch procedure access only appropriate ranges. This observation tests the actual effect of configure partition function scheme and aligned indexes for the documented range key instead of assuming that a configuration change alone was successful. The underlying database behavior is that aligned partitioned data and indexes support partition-aware administration and query pruning. The control matters because misaligned indexes can prevent intended partition switching or retain extra data.
Incorrect Answers
A:A usage report confirms allowed idle pauses without unacceptable active-workload delay could validate a separate fix, for example when an intermittent development SQL workload runs 24 hours with almost no activity. Here the required proof is that a test query and partition-switch procedure access only appropriate ranges. The alternative tests another database behavior and cannot establish whether the stated issue was corrected.
C:A rehearsal switches a complete history partition under expected operational limits could validate a separate fix, for example when a migration requires a large partitioned table to support monthly archival with minimal downtime. Here the required proof is that a test query and partition-switch procedure access only appropriate ranges. The alternative tests another database behavior and cannot establish whether the stated issue was corrected.
D:Disk queue and write latency measurements improve after the reviewed storage adjustment could validate a separate fix, for example when a SQL Server VM has high read latency because data log and tempdb share unsuitable disks. Here the required proof is that a test query and partition-switch procedure access only appropriate ranges. The alternative tests another database behavior and cannot establish whether the stated issue was corrected.
Question 795
For the requirement "An application occasionally deadlocks when two transactions update tables in opposite order", the proposed remediation is "Analyze Extended Events deadlock graphs and standardize transaction resource ordering". Which result BEST demonstrates success?
- The query's estimated versus actual row counts and plan quality improve
- A workload benchmark shows net improvement after applying only justified index changes
- A stress test no longer reproduces the observed deadlock cycle
- The query reuses the approved plan and performance recovery is measured
Explanation
Correct Answer
C:A stress test no longer reproduces the observed deadlock cycle. This observation tests the actual effect of analyze Extended Events deadlock graphs and standardize transaction resource ordering instead of assuming that a configuration change alone was successful. The underlying database behavior is that deadlocks arise when concurrent sessions wait cyclically for incompatible resources. The control matters because disabling transaction isolation without understanding lock order can introduce data anomalies.
Incorrect Answers
A:The query's estimated versus actual row counts and plan quality improve could validate a separate fix, for example when a query is repeatedly recompiled after statistics become stale on a rapidly changing table. Here the required proof is that a stress test no longer reproduces the observed deadlock cycle. The alternative tests another database behavior and cannot establish whether the stated issue was corrected.
B:A workload benchmark shows net improvement after applying only justified index changes could validate a separate fix, for example when an Azure SQL developer sees a missing index recommendation and wants to apply all suggested indexes immediately. Here the required proof is that a stress test no longer reproduces the observed deadlock cycle. The alternative tests another database behavior and cannot establish whether the stated issue was corrected.
D:The query reuses the approved plan and performance recovery is measured could validate a separate fix, for example when a production change caused a query regression and its last known good Query Store plan is available. Here the required proof is that a stress test no longer reproduces the observed deadlock cycle. The alternative tests another database behavior and cannot establish whether the stated issue was corrected.
Question 796
After remediating "A SQL Server Agent backup job appears successful but the database backup step was skipped", which evidence BEST shows the intended outcome was achieved?
- The job step succeeds and a prohibited privileged operation still fails
- The job history records the stored procedure completing at the planned time
- A release rehearsal runs the updated job with the new procedure successfully
- The corrected history includes every required step and the backup file is verified
Explanation
Correct Answer
D:The corrected history includes every required step and the backup file is verified. This observation tests the actual effect of inspect the job step flow and on-success or on-failure branching settings instead of assuming that a configuration change alone was successful. The underlying database behavior is that sQL Agent workflows can determine which step executes after each outcome. The control matters because a successful final step does not prove that all intended earlier steps ran.
Incorrect Answers
A:The job step succeeds and a prohibited privileged operation still fails could validate a separate fix, for example when a SQL maintenance job fails because it runs under an identity without permission on its target database. Here the required proof is that the corrected history includes every required step and the backup file is verified. The alternative tests another database behavior and cannot establish whether the stated issue was corrected.
B:The job history records the stored procedure completing at the planned time could validate a separate fix, for example when a managed SQL instance must run a stored procedure nightly without relying on a logged-in administrator. Here the required proof is that the corrected history includes every required step and the backup file is verified. The alternative tests another database behavior and cannot establish whether the stated issue was corrected.
C:A release rehearsal runs the updated job with the new procedure successfully could validate a separate fix, for example when a deployment replaces a stored procedure referenced by a SQL Agent job with a new parameter list. Here the required proof is that the corrected history includes every required step and the backup file is verified. The alternative tests another database behavior and cannot establish whether the stated issue was corrected.
Question 797
A database administrator selects "Validate identity membership refresh and session/token lifecycle rather than only database role text" after observing "A DBA removes a developer from an Entra group but a long-lived connection retains current access". What mechanism makes it appropriate?
- External identity authorization can depend on effective token claims and existing session state
- Managed Instance supports SQL Server-style logins for relevant instance-scoped access patterns
- Contained database users can authenticate through Microsoft Entra without a traditional SQL Server password login
- Secretless or managed-identity authentication reduces the exposure of reusable database credentials
Explanation
Correct Answer
A:External identity authorization can depend on effective token claims and existing session state. This is the mechanism that makes the proposed change, validate identity membership refresh and session/token lifecycle rather than only database role text, appropriate to the database environment described. The key limitation is that expecting an active access token to vanish immediately after group membership change can be incorrect. A concrete confirmation is that a new login after token refresh is denied while approved identities continue working.
Incorrect Answers
B:Managed Instance supports SQL Server-style logins for relevant instance-scoped access patterns is a valid distinction for a different database situation, for example when an Azure SQL Managed Instance needs a login with instance scope for several approved databases. Here the determining mechanism is that external identity authorization can depend on effective token claims and existing session state. The alternative does not explain why the selected solution addresses this requirement.
C:Contained database users can authenticate through Microsoft Entra without a traditional SQL Server password login is a valid distinction for a different database situation, for example when a new Entra group should have rights in an Azure SQL database without a SQL login secret. Here the determining mechanism is that external identity authorization can depend on effective token claims and existing session state. The alternative does not explain why the selected solution addresses this requirement.
D:Secretless or managed-identity authentication reduces the exposure of reusable database credentials is a valid distinction for a different database situation, for example when a database administrator wants to avoid storing sensitive passwords in Azure deployment scripts. Here the determining mechanism is that external identity authorization can depend on effective token claims and existing session state. The alternative does not explain why the selected solution addresses this requirement.
Question 798
In the scenario "A backup succeeds on SQL Server VM but the team cannot recover because the encryption certificate was lost", what should the database administrator do FIRST to address the stated requirement?
- Plan geo-restore using a supported geo-redundant backup configuration
- Back up and protect the encryption certificate or key material alongside backup chain procedures
- Restore under a secure target identity and sanitize confidential data before release
- Document and configure short-term PITR and separate LTR policies as needed
Explanation
Correct Answer
B:Back up and protect the encryption certificate or key material alongside backup chain procedures. The deciding requirement in this SQL platform scenario is addressed because encrypted native SQL backup restoration requires appropriate decryption key access. Without the change, a backup file's existence does not guarantee it is restorable after key loss. Confirm the outcome through a controlled validation where a sandbox restores the encrypted backup using retrieved protected key material.
Incorrect Answers
A:Plan geo-restore using a supported geo-redundant backup configuration would instead apply to another SQL platform issue, such as when a company needs to restore an Azure SQL database after the primary Azure Region becomes inaccessible. The present requirement calls for back up and protect the encryption certificate or key material alongside backup chain procedures; this alternative changes a different control and does not directly resolve the stated database issue.
C:Restore under a secure target identity and sanitize confidential data before release would instead apply to another SQL platform issue, such as when a production restore is prepared for a nonproduction environment used by a third-party vendor. The present requirement calls for back up and protect the encryption certificate or key material alongside backup chain procedures; this alternative changes a different control and does not directly resolve the stated database issue.
D:Document and configure short-term PITR and separate LTR policies as needed would instead apply to another SQL platform issue, such as when a disaster recovery plan assumes Azure SQL automated point-in-time backups exist for unlimited years. The present requirement calls for back up and protect the encryption certificate or key material alongside backup chain procedures; this alternative changes a different control and does not directly resolve the stated database issue.
Question 799
For the case "A large OLTP table needs compression but frequent updates raise CPU usage", the team chooses "Compare row and page compression using a tested subset of representative queries and writes". Which database behavior justifies that choice?
- Database integrity checks detect structural inconsistencies not shown by successful login tests
- Database scoped configuration controls selected engine behaviors at database granularity
- Compression reduces storage and read I/O but may increase CPU overhead for modifications
- Statistics guide optimizer row-count estimates and may need updates after distribution changes
Explanation
Correct Answer
C:Compression reduces storage and read I/O but may increase CPU overhead for modifications. This is the mechanism that makes the proposed change, compare row and page compression using a tested subset of representative queries and writes, appropriate to the database environment described. The key limitation is that applying highest compression indiscriminately can penalize busy write transactions. A concrete confirmation is that a benchmark confirms net cost and performance improvements for the selected compression type.
Incorrect Answers
A:Database integrity checks detect structural inconsistencies not shown by successful login tests is a valid distinction for a different database situation, for example when a DBA needs to detect corruption regularly on a SQL Server virtual machine. Here the determining mechanism is that compression reduces storage and read I/O but may increase CPU overhead for modifications. The alternative does not explain why the selected solution addresses this requirement.
B:Database scoped configuration controls selected engine behaviors at database granularity is a valid distinction for a different database situation, for example when a database-scoped setting needs to enable a supported optimizer behavior without changing all databases on an instance. Here the determining mechanism is that compression reduces storage and read I/O but may increase CPU overhead for modifications. The alternative does not explain why the selected solution addresses this requirement.
D:Statistics guide optimizer row-count estimates and may need updates after distribution changes is a valid distinction for a different database situation, for example when a reporting workload makes poor cardinality estimates after a significant bulk load. Here the determining mechanism is that compression reduces storage and read I/O but may increase CPU overhead for modifications. The alternative does not explain why the selected solution addresses this requirement.
Question 800
The team plans to Compare General Purpose serverless settings against provisioned capacity with pause prerequisites in response to "An intermittent development SQL workload runs 24 hours with almost no activity". Which technical principle BEST explains this approach?
- Azure SQL service tiers differ in compute storage architecture and performance characteristics
- SQL data compression can reduce storage and I/O at the cost of additional CPU work
- Azure SQL provisioned compute tiers can be resized to meet measured workload resource demand
- Supported serverless databases can reduce compute consumption during idle periods
Explanation
Correct Answer
D:Supported serverless databases can reduce compute consumption during idle periods. This is the mechanism that makes the proposed change, compare General Purpose serverless settings against provisioned capacity with pause prerequisites, appropriate to the database environment described. The key limitation is that disabling automatic pause by keeping persistent connections open removes intended cost savings. A concrete confirmation is that a usage report confirms allowed idle pauses without unacceptable active-workload delay.
Incorrect Answers
A:Azure SQL service tiers differ in compute storage architecture and performance characteristics is a valid distinction for a different database situation, for example when a latency-sensitive transactional workload suffers read delays under the General Purpose tier. Here the determining mechanism is that supported serverless databases can reduce compute consumption during idle periods. The alternative does not explain why the selected solution addresses this requirement.
B:SQL data compression can reduce storage and I/O at the cost of additional CPU work is a valid distinction for a different database situation, for example when a reporting table has many repeated values and storage cost dominates. Here the determining mechanism is that supported serverless databases can reduce compute consumption during idle periods. The alternative does not explain why the selected solution addresses this requirement.
C:Azure SQL provisioned compute tiers can be resized to meet measured workload resource demand is a valid distinction for a different database situation, for example when an application has predictable CPU spikes but the vCore maximum is too small for peak traffic. Here the determining mechanism is that supported serverless databases can reduce compute consumption during idle periods. The alternative does not explain why the selected solution addresses this requirement.