[Jun 30, 2026] Lesson Brilliant PDF for the 306-300 Tests Free Updated Today
Get New 2026 Valid Practice LPIC Level 3 306-300 Q&A - Testing Engine
The LPIC-3 Exam 306 is a challenging certification exam that requires a thorough understanding of high availability and storage cluster technologies and their application in Linux environments. Earning this certification demonstrates a high level of expertise and can help IT professionals advance their careers in fields such as system administration, network engineering, and cloud computing.
NEW QUESTION # 76
How can you scale up a Ceph cluster?
- A. By configuring additional MDS instances for improved file system performance.
- B. By increasing the number of OSDs to expand storage capacity.
- C. By adjusting the CRUSH map to include more placement groups.
- D. By adding additional MGR instances for better cluster management.
Answer: B
NEW QUESTION # 77
What is the purpose of initializing a Ceph cluster?
- A. To create the initial CRUSH map.
- B. To configure high availability settings.
- C. To assign storage devices to OSDs.
- D. To generate cryptographic keys for secure communication.
Answer: D
NEW QUESTION # 78
Which command is used to mount an existing GlusterFS volume?
- A. glusterfs
- B. glusterfs-mountvolume
- C. glusterfs-mount
- D. glusterfs-mountpoint
Answer: A
NEW QUESTION # 79
While setting up a load-balanced HTTP service, Linux Virtual Server was configured with the commands:
ipvsadm -A -t 198.51.100.2:80 -s rr
ipvsadm -a -t 198.51.100.2:80 -r 192.168.10.1:80 -m
ipvsadm -a -t 198.51.100.2:80 -r 192.168.10.2:80 -m and all backend servers are using the LVS host as the default router.
Which additional command has to be issued on the LVS host in order to correctly handle incoming HTTP traffic?
- A. ipvsadmin -L -n
- B. echo "1" > /proc/sys/net/ipv4/ip_forward
- C. netstat -r
- D. iptables -t nat -Z
- E. ipmasq -A 192.168.10.1 -A 192.168.10.2 -p tcp --dport www -j DEMASQ
Answer: B
NEW QUESTION # 80
What is an autonomous system in the context of network high availability?
- A. A collection of routers under a single administrative domain.
- B. A network with redundant uplinks for failover.
- C. A network with multiple VLANs for traffic separation.
- D. A system that can operate independently without external connections.
Answer: A
NEW QUESTION # 81
Which of the following statements are true regarding the handling of a hardware error in a high availability cluster? (Choose THREE correct answers.)
- A. Services are restarted on or redirected to other cluster nodes.
- B. Erroneous components are physically turned off as they are in an undefined state.
- C. After the cluster deals with an error, no manual actions are required to bring the cluster back to normal operation.
- D. High availability provides automatic recovery from software errors only and cannot mitigate hardware issues.
- E. The cluster management components monitor the health of all cluster components.
Answer: A,B,E
NEW QUESTION # 82
What is GNFS in the context of GlusterFS?
- A. A high-level programming interface for developing GlusterFS applications.
- B. A network protocol used for communication between GlusterFS peers.
- C. An encryption mechanism for securing data in GlusterFS volumes.
- D. A command-line utility for managing GlusterFS clusters.
Answer: B
NEW QUESTION # 83
Which utility is typically used to configure and manage LVS (Linux Virtual Server) or IPVS (IP Virtual Server) in a Load Balanced Cluster?
- A. HAProxy
- B. genhash
- C. ipvsadm
- D. ldirectord
Answer: C
NEW QUESTION # 84
Which Pacemaker feature is used to detect and handle split brain scenarios when shared storage is used?
- A. Split Brain Detector
- B. Fencing
- C. Quorum
- D. Resource rules
Answer: A
NEW QUESTION # 85
How can you configure high availability aspects of Ceph?
- A. By configuring MDS instances with mirroring and synchronization.
- B. By configuring replication and erasure coding for storage pools.
- C. By adjusting the CRUSH map to include multiple MON nodes.
- D. By enabling redundancy and failover mechanisms for OSDs.
Answer: C
NEW QUESTION # 86
Which tool is used to configure system shutdown at specific UPS events?
- A. smartctl
- B. apcupsd
- C. nvme-cli
- D. monit
Answer: B
NEW QUESTION # 87
Which load balancing algorithm selects backend servers based on the source IP address of incoming requests?
- A. Tunneling
- B. Source IP Hash
- C. Direct Routing
- D. NAT (Network Address Translation)
Answer: B
NEW QUESTION # 88
What is the purpose of GlusterFS in a high availability distributed storage system?
- A. To provide load balancing for web applications.
- B. To manage network security for storage clusters.
- C. To enable data replication and fault tolerance.
- D. To optimize storage performance in virtualized environments.
Answer: C
NEW QUESTION # 89
Which of the following statements is true regarding the quorum in a two node Pacemaker cluster?
- A. The default quorum policy in a two node cluster must be set to ignore in order to configure a working cluster.
- B. Clusters with one or two nodes cannot have a quorum and require no quorum configuration.
- C. In a two node cluster the quorum is always held by the node that first started the cluster software.
- D. In a two node cluster, quorum can be determined and handled just as in a cluster with a higher number of nodes.
Answer: A
NEW QUESTION # 90
Which storage backends are available in Ceph?
- A. Rados and CephFS
- B. FileStore and BlueStore
- C. BlockStore and ObjectStore
- D. OSD and MDS
Answer: B
NEW QUESTION # 91
Which configuration file is used to set up and define the behavior of keepalived in a Load Balanced Cluster?
- A. HAProxy configuration file
- B. genhash configuration file
- C. ldirectord configuration file
- D. keepalived configuration file
Answer: D
NEW QUESTION # 92
What is an iSCSI initiator?
- A. A protocol used for multipathing in SAN environments
- B. A storage device in a SAN
- C. A device used for managing distributed lock management
- D. A server or client that connects to an iSCSI target
Answer: D
NEW QUESTION # 93
In the command: pcs constraint order VHost1IPv4 ____ HTTPD which missing word is required in order to ensure that the service HTTPD is always started after the service VHost1IPv4?
Solution: then -or- THEN
Determine whether the given solution is correct?
- A. Correct
- B. Incorrect
Answer: A
NEW QUESTION # 94
Which of the following statements are true regarding the determination of the capacity of a high availability cluster? (Choose TWO correct answers.)
- A. The number of nodes in a cluster has no effect on the availability as long as the sum of the available computing resources is equal.
- B. Failover clusters can be used to scale a single service beyond the capacity of a single cluster node.
- C. In regular cluster operation, not all resources are used.
- D. In case of the failure of any component, enough resources must remain to provide all cluster services.
- E. The overall capacity of all components in the cluster doesn't have to be larger than the resources needed in a regular setup.
Answer: C,D
NEW QUESTION # 95
Which of the following statements is true regarding a failover cluster?
- A. Failover clusters provide scalability of a service beyond the capacities of one cluster node.
- B. In normal operation, services may be spread over all nodes.
- C. The core component of every failover cluster is a load balancer.
- D. Failover clusters always require storage that is shared by all nodes.
- E. Every service may not be run more than once in a cluster.
Answer: B
NEW QUESTION # 96
Which of the following can be used as a low level device for DRBD? (Choose TWO correct answers.)
- A. A rewritable CD
- B. A LVM logical volume
- C. A tape streamer
- D. A physical hard disk
- E. A virtual tape library
Answer: B,D
NEW QUESTION # 97
Which command-line utility is used to manage the Pacemaker cluster configuration database?
- A. pcs
- B. crm
- C. cibadmin
- D. crm_mon
Answer: C
NEW QUESTION # 98
Which of the following are not valid load balancing algorithms for HAProxy?
- A. weightedrr
- B. leastconn
- C. source
Answer: A
NEW QUESTION # 99
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