CompTIA SK0-005 Practice Test 28
Question 270
A change board is planning a verified response to this server event: A new web release rolls out while a pool member takes 90 seconds to warm up, causing clients to receive failures before readiness. For the Load balancer health checking issue, which response elements belong in the approved plan? Select TWO answers.
- During a planned partition only one side accepts authoritative writes and recovery avoids divergent state.
- Mark a backend healthy solely because the VM answers ping.
- Compare TCP checks with application-level probe status, backend error rates, warm-up time and active connections.
- Set authoritative zone records and split-view policy correctly, then validate resolver paths, TTL and cache expiration.
- Use application-aware health checks, appropriate rise/fall thresholds and connection draining for deployments.
Explanation
Correct Answer
C:The expected technical relationship is: A transport-level open port may not prove application readiness, and graceful draining protects in-flight sessions. These observations investigate the exact Load balancer health checking failure rather than unrelated components.
E:A transport-level open port may not prove application readiness, and graceful draining protects in-flight sessions. Before rollout, confirm the problem with: Compare TCP checks with application-level probe status, backend error rates, warm-up time and active connections.
Incorrect Answers
A:For this incident, the relevant principle is: A transport-level open port may not prove application readiness, and graceful draining protects in-flight sessions. This statement concerns Cluster quorum and split-brain prevention, a different Server+ technical control.
B:Discriminate using: Compare TCP checks with application-level probe status, backend error rates, warm-up time and active connections.
D:For this incident, the relevant principle is: A transport-level open port may not prove application readiness, and graceful draining protects in-flight sessions. It does not directly address the reported Load balancer health checking fault or prove its repair.
Question 271
A server administrator is investigating a server issue involving database replication and failover objective: A standby database is minutes behind the primary yet operations claim near-zero recovery point without checking replication lag. The change must address the documented fault without creating unrelated risk. Which corrective action is most appropriate? Select ONE best answer.
- Assume any asynchronous replica provides zero data loss and instant failover.
- Use application-aware health checks, appropriate rise/fall thresholds and connection draining for deployments.
- Configure an appropriate witness and quorum voting model with fencing or leader election to avoid simultaneous primaries.
- Define supported sync/async replication and failover mechanisms consistent with RPO/RTO; test role promotion and endpoint switching.
Explanation
Correct Answer
D:A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes.
Incorrect Answers
A:This is the unsafe shortcut in the Database replication and failover objective scenario, not a justified remediation or diagnostic. A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes.
B:That option would use application-aware health checks, appropriate rise/fall thresholds and connection draining for deployments, but it addresses a different concern. A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes.
C:That option would configure an appropriate witness and quorum voting model with fencing or leader election to avoid simultaneous primaries, but it addresses a different concern. A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes.
Question 272
While reviewing the CompTIA Server+ administration incident, a technician learns: A standby database is minutes behind the primary yet operations claim near-zero recovery point without checking replication lag. Which principle most directly explains how to address the described issue safely? Select ONE best answer.
- UEFI, GPT and the installed bootloader must match a supported boot path; changing boot mode after installation can prevent startup.
- DHCP broadcasts normally need a relay across routed subnets, and leases must match the client network and scope policy.
- A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes.
- Layer-two VLAN membership and layer-three routing are distinct requirements; correct IP syntax alone does not guarantee reachability.
Explanation
Correct Answer
C:Applying it leads to this operational action: Define supported sync/async replication and failover mechanisms consistent with RPO/RTO; test role promotion and endpoint switching.
Incorrect Answers
A:This statement concerns UEFI boot and GPT provisioning, a different Server+ technical control. It does not directly address the reported Database replication and failover objective fault or prove its repair. For this incident, the relevant principle is: A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes. A targeted investigation checks: Measure apply lag, replication errors, client reconnection behavior and failover event timestamps. The desired recovery condition is: A rehearsed failover restores service within RTO with observed data loss no greater than RPO.
B:This statement concerns DHCP scope and relay design, a different Server+ technical control. It does not directly address the reported Database replication and failover objective fault or prove its repair. For this incident, the relevant principle is: A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes. A targeted investigation checks: Measure apply lag, replication errors, client reconnection behavior and failover event timestamps. The desired recovery condition is: A rehearsed failover restores service within RTO with observed data loss no greater than RPO.
D:This statement concerns VLAN segmentation and default gateway, a different Server+ technical control. It does not directly address the reported Database replication and failover objective fault or prove its repair. For this incident, the relevant principle is: A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes. A targeted investigation checks: Measure apply lag, replication errors, client reconnection behavior and failover event timestamps. The desired recovery condition is: A rehearsed failover restores service within RTO with observed data loss no greater than RPO.
Question 273
Before a server change is approved, the on-call engineer receives this incident report: A standby database is minutes behind the primary yet operations claim near-zero recovery point without checking replication lag. Which evidence would most directly establish the stated root-cause hypothesis? Select ONE best answer.
- Inspect DHCP discover/offer captures, relay configuration, scope utilization and leased default gateways.
- Review cluster vote configuration, witness reachability, fencing logs and simulated partition behavior.
- Assume any asynchronous replica provides zero data loss and instant failover.
- Measure apply lag, replication errors, client reconnection behavior and failover event timestamps.
Explanation
Correct Answer
D:These observations investigate the exact Database replication and failover objective failure rather than unrelated components. Incident: A standby database is minutes behind the primary yet operations claim near-zero recovery point without checking replication lag.
Incorrect Answers
A:For this incident, the relevant principle is: A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes. A targeted investigation checks: Measure apply lag, replication errors, client reconnection behavior and failover event timestamps.
B:For this incident, the relevant principle is: A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes.
C:This is the unsafe shortcut in the Database replication and failover objective scenario, not a justified remediation or diagnostic. Incident: A standby database is minutes behind the primary yet operations claim near-zero recovery point without checking replication lag.
Question 274
After the team implements a targeted remediation for Database replication and failover objective, the original incident was: A standby database is minutes behind the primary yet operations claim near-zero recovery point without checking replication lag. Which acceptance criterion would best demonstrate a durable and safe resolution? Select ONE best answer.
- The server reaches only intended subnets through the correct gateway while segmentation rules remain enforced.
- All required services start in order after reboot and pass application-level health checks.
- Unready nodes receive no new requests, ready nodes join predictably and existing requests drain successfully.
- A rehearsed failover restores service within RTO with observed data loss no greater than RPO.
Explanation
Correct Answer
D:A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes.
Incorrect Answers
A:This statement concerns VLAN segmentation and default gateway, a different Server+ technical control. It does not directly address the reported Database replication and failover objective fault or prove its repair.
B:This statement concerns Service dependency and restart management, a different Server+ technical control. It does not directly address the reported Database replication and failover objective fault or prove its repair. For this incident, the relevant principle is: A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes. A targeted investigation checks: Measure apply lag, replication errors, client reconnection behavior and failover event timestamps. The desired recovery condition is: A rehearsed failover restores service within RTO with observed data loss no greater than RPO.
C:This statement concerns Load balancer health checking, a different Server+ technical control. It does not directly address the reported Database replication and failover objective fault or prove its repair. For this incident, the relevant principle is: A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes. A targeted investigation checks: Measure apply lag, replication errors, client reconnection behavior and failover event timestamps. The desired recovery condition is: A rehearsed failover restores service within RTO with observed data loss no greater than RPO.
Question 275
A change board is planning a verified response to this server event: A standby database is minutes behind the primary yet operations claim near-zero recovery point without checking replication lag. For the Database replication and failover objective issue, which response elements belong in the approved plan? Select ONE best answer.
- Define supported sync/async replication and failover mechanisms consistent with RPO/RTO; test role promotion and endpoint switching. Then validate the change by confirming: A rehearsed failover restores service within RTO with observed data loss no greater than RPO.
- Configure nonoverlapping DHCP scopes, appropriate relay or helper settings and correct lease, gateway and DNS options.
- Inspect package SBOM, license texts, modification/distribution history and subscription records.
- Assume any asynchronous replica provides zero data loss and instant failover.
Explanation
Correct Answer
A:A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes. The proposed change and outcome assessment work together for Database replication and failover objective.
Incorrect Answers
B:That option would configure nonoverlapping DHCP scopes, appropriate relay or helper settings and correct lease, gateway and DNS options, but it addresses a different concern. A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes.
C:That option would inspect package SBOM, license texts, modification/distribution history and subscription records, but it addresses a different concern. A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes.
D:This is the unsafe shortcut in the Database replication and failover objective scenario, not a justified remediation or diagnostic. Discriminate using: Measure apply lag, replication errors, client reconnection behavior and failover event timestamps.
Question 276
A server administrator is investigating a server issue involving database replication and failover objective: A mission-critical service has a secondary instance, but the failover procedure never updates connection endpoints or verifies consistency. The change must address the documented fault without creating unrelated risk. Which corrective action is most appropriate? Select ONE best answer.
- Verify migration CPU compatibility, shared/storage accessibility and destination resource headroom before moving VMs.
- Assume any asynchronous replica provides zero data loss and instant failover.
- Define supported sync/async replication and failover mechanisms consistent with RPO/RTO; test role promotion and endpoint switching.
- Right-size vCPU and RAM allocations using contention telemetry and supportable reservations or resource controls.
Explanation
Correct Answer
C:A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes.
Incorrect Answers
A:That option would verify migration CPU compatibility, shared/storage accessibility and destination resource headroom before moving VMs, but it addresses a different concern. A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes.
B:This is the unsafe shortcut in the Database replication and failover objective scenario, not a justified remediation or diagnostic. Incident: A mission-critical service has a secondary instance, but the failover procedure never updates connection endpoints or verifies consistency.
D:This statement concerns Hypervisor resource overcommit and reservations, a different Server+ technical control. It does not directly address the reported Database replication and failover objective fault or prove its repair. For this incident, the relevant principle is: A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes. A targeted investigation checks: Measure apply lag, replication errors, client reconnection behavior and failover event timestamps. The desired recovery condition is: A rehearsed failover restores service within RTO with observed data loss no greater than RPO.
Question 277
While reviewing the CompTIA Server+ administration incident, a technician learns: A mission-critical service has a secondary instance, but the failover procedure never updates connection endpoints or verifies consistency. Which principle most directly explains how to address the described issue safely? Select ONE best answer.
- A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes.
- Allocated virtual resources are not guaranteed physically available under contention; vCPU ready and memory reclaim can harm latency.
- Live migration depends on compatible host features and enough resources on the target, even if the guest OS is unchanged.
- DNS answers depend on resolver selection, authoritative records and caching; a ping of one host does not validate all name-resolution paths.
Explanation
Correct Answer
A:Applying it leads to this operational action: Define supported sync/async replication and failover mechanisms consistent with RPO/RTO; test role promotion and endpoint switching.
Incorrect Answers
B:This statement concerns Hypervisor resource overcommit and reservations, a different Server+ technical control. It does not directly address the reported Database replication and failover objective fault or prove its repair.
C:This statement concerns Live migration compatibility and resource headroom, a different Server+ technical control. It does not directly address the reported Database replication and failover objective fault or prove its repair. For this incident, the relevant principle is: A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes. A targeted investigation checks: Measure apply lag, replication errors, client reconnection behavior and failover event timestamps. The desired recovery condition is: A rehearsed failover restores service within RTO with observed data loss no greater than RPO.
D:This statement concerns DNS split-horizon and resolver troubleshooting, a different Server+ technical control. It does not directly address the reported Database replication and failover objective fault or prove its repair. For this incident, the relevant principle is: A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes. A targeted investigation checks: Measure apply lag, replication errors, client reconnection behavior and failover event timestamps. The desired recovery condition is: A rehearsed failover restores service within RTO with observed data loss no greater than RPO.
Question 278
Before a server change is approved, the on-call engineer receives this incident report: A mission-critical service has a secondary instance, but the failover procedure never updates connection endpoints or verifies consistency. Which evidence would most directly establish the stated root-cause hypothesis? Select ONE best answer.
- Measure apply lag, replication errors, client reconnection behavior and failover event timestamps.
- Assume any asynchronous replica provides zero data loss and instant failover.
- Measure time offset, NTP peer reachability, stratum and event timestamps on affected systems.
- Query each resolver directly, inspect answer sections and TTLs, compare private/public zones and client resolver lists.
Explanation
Correct Answer
A:These observations investigate the exact Database replication and failover objective failure rather than unrelated components. Incident: A mission-critical service has a secondary instance, but the failover procedure never updates connection endpoints or verifies consistency.
Incorrect Answers
B:A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes.
C:For this incident, the relevant principle is: A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes.
D:For this incident, the relevant principle is: A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes. This statement concerns DNS split-horizon and resolver troubleshooting, a different Server+ technical control.
Question 279
After the team implements a targeted remediation for Database replication and failover objective, the original incident was: A mission-critical service has a secondary instance, but the failover procedure never updates connection endpoints or verifies consistency. Which acceptance criterion would best demonstrate a durable and safe resolution? Select ONE best answer.
- The VM migrates without guest interruption and maintains its workload performance after placement.
- A rehearsed failover restores service within RTO with observed data loss no greater than RPO.
- Unready nodes receive no new requests, ready nodes join predictably and existing requests drain successfully.
- Target latency and throughput hold under representative peak load with monitored headroom.
Explanation
Correct Answer
B:A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes.
Incorrect Answers
A:This statement concerns Live migration compatibility and resource headroom, a different Server+ technical control. It does not directly address the reported Database replication and failover objective fault or prove its repair.
C:This statement concerns Load balancer health checking, a different Server+ technical control. It does not directly address the reported Database replication and failover objective fault or prove its repair. For this incident, the relevant principle is: A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes. A targeted investigation checks: Measure apply lag, replication errors, client reconnection behavior and failover event timestamps. The desired recovery condition is: A rehearsed failover restores service within RTO with observed data loss no greater than RPO.
D:This statement concerns Server resource monitoring and capacity planning, a different Server+ technical control. It does not directly address the reported Database replication and failover objective fault or prove its repair. For this incident, the relevant principle is: A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes. A targeted investigation checks: Measure apply lag, replication errors, client reconnection behavior and failover event timestamps. The desired recovery condition is: A rehearsed failover restores service within RTO with observed data loss no greater than RPO.
Question 280
A change board is planning a verified response to this server event: A mission-critical service has a secondary instance, but the failover procedure never updates connection endpoints or verifies consistency. For the Database replication and failover objective issue, which response elements belong in the approved plan? Select TWO answers.
- Set authoritative zone records and split-view policy correctly, then validate resolver paths, TTL and cache expiration.
- Measure apply lag, replication errors, client reconnection behavior and failover event timestamps.
- Define supported sync/async replication and failover mechanisms consistent with RPO/RTO; test role promotion and endpoint switching.
- Unready nodes receive no new requests, ready nodes join predictably and existing requests drain successfully.
- Assume any asynchronous replica provides zero data loss and instant failover.
Explanation
Correct Answer
B:These observations investigate the exact Database replication and failover objective failure rather than unrelated components. The expected technical relationship is: A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes.
C:A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes. This is the appropriate targeted correction for Database replication and failover objective.
Incorrect Answers
A:For this incident, the relevant principle is: A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes. It does not directly address the reported Database replication and failover objective fault or prove its repair.
D:For this incident, the relevant principle is: A standby's existence does not prove recoverability; replication lag, failover automation and consistency determine outcomes. This statement concerns Load balancer health checking, a different Server+ technical control.
E:Incident: A mission-critical service has a secondary instance, but the failover procedure never updates connection endpoints or verifies consistency.
