50 comptia server+ practice test Practice Questions: Question Bank 2025

A technician needs to add redundant power to a rack server that currently has one power supply installed. The server model supports two hot-swappable PSUs. Which action is the BEST practice to avoid downtime?

A server fails to boot after a scheduled shutdown. The POST screen shows no errors, but the OS cannot find a boot device. Which configuration issue is the MOST likely cause?

An administrator wants to ensure that critical server logs are still available if an attacker compromises the server. Which solution BEST supports this goal?

A new rack server has multiple network ports: two 1GbE and two 10GbE. The organization wants to separate management traffic from production traffic. Which configuration BEST meets this requirement?

A virtualization host has two physical NICs. The business requires continued network connectivity if one NIC or switch port fails, without changing IP addressing. Which solution should the administrator implement?

A file server uses RAID 5 with five disks. One disk fails and is replaced. During the rebuild, users report severe performance degradation. Which explanation is MOST accurate?

A company wants to reduce RPO for a critical database by ensuring that writes are quickly replicated to a secondary site. Which approach BEST meets a near-zero RPO requirement?

After a maintenance window, a Linux server shows high CPU usage and slow performance. The administrator finds many processes in a 'D' (uninterruptible sleep) state. What is the MOST likely root cause?

A company must enforce that only approved firmware versions can run on its servers to reduce the risk of bootkits. Which capability BEST addresses this requirement?

A server intermittently reboots under load. Logs show multiple Machine Check Exception (MCE) events. Memory tests pass, and CPU temperatures are normal. Which is the MOST likely next component to investigate?

A technician needs to connect a rack server to a KVM switch, but the server only provides a USB keyboard/mouse interface. Which device should the technician use to ensure compatibility with the KVM?

An administrator wants to protect management traffic for iDRAC/iLO and reduce the risk of lateral movement from user networks. Which approach is the BEST practice?

A server’s fans ramp to maximum and the system becomes unresponsive shortly after boot. The technician suspects inadequate cooling. Which initial action is MOST appropriate?

A company needs to ensure an internal web application can continue running if one physical host fails. The web tier is stateless, and sessions are stored in a separate cache service. Which solution BEST meets the requirement with minimal complexity?

A technician replaces a failed NIC in a server. After replacement, the server boots, but the monitoring system shows the interface is down and no network connectivity is available. Which step is MOST likely to restore connectivity quickly?

An administrator wants to implement least privilege for server administration and reduce the chance of credential theft. Which method is BEST?

A server uses RAID 1 for its OS volume. One disk fails, and the array is degraded. The replacement disk is inserted and recognized, but the array does not rebuild automatically. What should the administrator do NEXT?

A company requires the ability to restore a critical database to a specific point in time after accidental data deletion. Which backup strategy BEST meets this requirement?

After a firmware update, a server intermittently loses connectivity on a bonded NIC pair configured for redundancy. Logs show frequent link flaps on one interface, while the other remains stable. Which action is MOST appropriate to confirm whether the issue is caused by a faulty cable or transceiver rather than firmware?

A virtualized cluster experiences brief storage outages during switch maintenance, causing VM disk I/O pauses. The environment uses iSCSI over Ethernet with a single storage network path per host. Which design change BEST improves resiliency while maintaining performance?

A technician needs to rack-mount a new 2U server in a data center. Which action is the BEST practice to reduce physical safety risk during installation?

A server’s BMC/iLO/IPMI management interface is reachable from the production LAN. Which change BEST reduces the risk of unauthorized remote console access?

An administrator needs to ensure that new virtual machines always receive the same IP address, based on their network interface, without configuring static IPs inside the guest OS. Which solution should the administrator implement?

A file server is running low on disk space. The administrator needs to quickly identify which folders are consuming the most space and take corrective action. Which approach is BEST?

A company requires that critical customer data remains available even if an entire rack loses power. Which design BEST meets this requirement?

After enabling new firewall rules, users report they can resolve hostnames but cannot establish connections to internal web applications. Which troubleshooting step should the administrator perform FIRST?

A server is connected to a UPS via USB. The administrator wants the server to automatically and gracefully shut down when the UPS battery reaches a critical threshold. What should be configured?

An administrator implements full-disk encryption on a server. During a planned remote reboot, the system stops at a pre-boot prompt waiting for a recovery key, and the server is in a remote site with no local staff. Which control would BEST prevent this situation in the future while maintaining encryption?

A virtualization host has two NICs connected to separate switches. The administrator configured NIC teaming for redundancy, but during a switch failure, some VMs lose connectivity for several minutes before recovering. Which configuration change is MOST likely to reduce failover time?

A company must meet strict RPO/RTO objectives for a critical database. Backups exist, but leadership wants the ability to restore service quickly even if the primary site is lost. Which solution BEST aligns with these requirements?

A technician installs a new server NIC and wants to minimize downtime if that NIC fails in production. Which configuration best meets this requirement?

An administrator wants to ensure only authorized servers can connect to a switch port in a secure data center rack. Which control should be implemented on the switch to enforce this?

A systems administrator needs to decommission a physical server and must ensure the storage media cannot be recovered by a third party. Which action is the MOST appropriate?

A technician needs to connect to a headless server to change BIOS settings, but the server is located in a remote data center. Which interface is MOST appropriate to use?

A virtualized environment is experiencing intermittent performance issues. Monitoring shows high CPU ready time on several VMs. Which action is the BEST next step to address the issue?

A company requires that backups be usable even if ransomware encrypts local files and attempts to encrypt network shares. Which backup design BEST mitigates this risk?

A database server is being rebuilt. The administrator wants to separate sequential database logs from random database reads/writes to reduce I/O contention. Which storage layout is BEST practice?

An administrator wants to ensure that configuration changes on production servers can be traced to an approved request and quickly rolled back if needed. Which approach BEST supports these goals?

After a power event, a server boots but cannot see its RAID virtual disk. In the RAID controller BIOS, the array is listed as "Foreign". What is the MOST appropriate action to restore access to the existing array without data loss?

A company must design a disaster recovery plan for a critical service with an RPO of 15 minutes and an RTO of 1 hour. Which solution is MOST likely to meet both requirements?

A technician needs to connect a server to a UPS so the operating system can perform a graceful shutdown during a prolonged power outage. Which connection method is MOST appropriate to enable this communication?

A Windows administrator needs a shared folder on a file server where users can create and modify files, but they must not be able to delete files once created. Which NTFS permission setup BEST meets this requirement?

A server room has several new rack-mounted servers. After installation, the room temperature rises and hot spots appear behind the racks. Which change will MOST directly improve cooling efficiency without adding new air-conditioning units?

A company must ensure that if the primary virtualization host fails, workloads automatically restart on another host with minimal downtime. Which solution BEST meets this requirement?

An administrator wants to reduce the attack surface on a Linux server running a web application. Which action is the BEST first step to accomplish this goal?

A RAID 10 array reports a single disk failure. Replacement disks are available, but the server must remain online. What should the administrator do NEXT to restore full redundancy with the least risk?

A server hosting a database experiences intermittent performance degradation. Monitoring shows the CPU is low, memory is stable, but disk latency spikes during the slow periods. Which tool or metric would BEST confirm the likely bottleneck?

A security team requires that backups stored off-site cannot be read if the media is lost, and they also want assurance the backups have not been altered. Which combination BEST addresses these requirements?

A company wants to implement multi-factor authentication (MFA) for administrative access to on-premises servers. The environment must still allow logins when the WAN link is down, but it should not reduce security. Which approach is BEST?

A critical application must have near-zero data loss and minimal downtime in the event the primary site fails. The company has sufficient bandwidth between sites and is willing to accept higher cost and complexity. Which disaster recovery design BEST meets these requirements?