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Lpi 306-300 (LPIC-3 Exam 306: High Availability and Storage Clusters) Certification Exam is a professional certification designed to validate the skills and knowledge of IT professionals who are responsible for designing, implementing, and managing high availability and storage clusters in Linux environments. LPIC-3 Exam 306: High Availability and Storage Clusters certification exam is intended for experienced Linux professionals who possess a strong understanding of Linux administration, networking, and storage technologies.
NEW QUESTION # 37
What is the purpose of configuring monit for alerts in case of resource exhaustion?
- A. To monitor network traffic on the system.
- B. To monitor disk space and memory usage.
- C. To monitor power supply status.
- D. To monitor CPU usage and temperature.
Answer: B
NEW QUESTION # 38
What is the purpose of integrating DRBD with Pacemaker?
- A. To configure networking connections and meshes for DRBD
- B. To provide high availability and automatic failover capabilities
- C. To monitor the health and status of DRBD devices
- D. To manage replication modes in DRBD
Answer: B
NEW QUESTION # 39
Which resource class in Pacemaker is used to monitor the health of cluster nodes based on CPU usage?
- A. ocf:pacemaker:NodeUtilization
- B. ocf:pacemaker:HealthCPU
- C. ocf:pacemaker:ping
- D. ocf:pacemaker:ocf:SysInfo
Answer: B
NEW QUESTION # 40
When using the gatewaying/direct routing forwarding method of Linux Virtual Server (LVS), which of the following statements is true?
- A. On the backend servers, all packets appear to originate from the IP address of the LVS host.
- B. The link layer addresses of all backend servers must be included in the LVS configuration.
- C. When using gatewaying/direct routing, only the round robin algorithm is available.
- D. The default route of all backend servers must point to the LVS host.
- E. Every backend server must accept packets addressed to the IP address of the virtual service.
Answer: E
NEW QUESTION # 41
True or False: Define constraints on which services may run on the same cluster node is the purpose of fencing in a high availability cluster.
- A. False
- B. True
Answer: A
NEW QUESTION # 42
What is the function of a Distributed Lock Manager (DLM) in cluster storage?
- A. To provide high-speed data transfer in SAN environments
- B. To handle concurrent access to shared resources in a cluster
- C. To configure multipathing for high availability in SAN environments
- D. To manage file systems on distributed storage
Answer: B
NEW QUESTION # 43
How can you restore and verify the integrity of a GlusterFS cluster after an outage?
- A. By rebalancing the data across the storage nodes.
- B. By running a cluster-wide file system check.
- C. By restarting the GlusterFS services on each peer.
- D. By synchronizing the trusted storage pools.
Answer: A
NEW QUESTION # 44
Which of the following statements are true regarding OCFS2? (Choose TWO correct answers.)
- A. OCFS2 is an integral part of Pacemaker and relies on Pacemaker services for functionality.
- B. In addition to filesystems, OCFS2 can handle other cluster services such as IP addresses and server daemons.
- C. When using OCFS2 with additional cluster software, OCFS2 must be integrated into the overall cluster manager to ensure consistent cluster behaviour.
- D. OCFS2 can be used without any additional software as it contains its own cluster manager, O2CB.
- E. To avoid the need for shared storage, OCFS2 can replicate the content of its filesystems via the network.
Answer: C,D
NEW QUESTION # 45
Which of the following statements are true regarding the handling of a hardware error in a high availability cluster? (Choose THREE correct answers.)
- A. The cluster management components monitor the health of all cluster components.
- B. Services are restarted on or redirected to other cluster nodes.
- C. After the cluster deals with an error, no manual actions are required to bring the cluster back to normal operation.
- D. Erroneous components are physically turned off as they are in an undefined state.
- E. High availability provides automatic recovery from software errors only and cannot mitigate hardware issues.
Answer: A,B,D
NEW QUESTION # 46
What does the /proc/mdstat file contain?
- A. Details about the RAID devices and their status.
- B. A log of disk check operations performed on the array.
- C. Information about the system's memory usage.
- D. The configuration file for the mdadm utility.
Answer: A
NEW QUESTION # 47
Which mechanism is used to ensure only one node has access to shared resources in a cluster?
- A. Split brain
- B. Replication
- C. Fencing
- D. Quorum
Answer: C
NEW QUESTION # 48
Which of the following device classes are commonly used STONITH devices? (Choose THREE correct answers.)
- A. Local node storage
- B. Blade Control Devices
- C. CPU frequency management tools
- D. Remote Management Services like iLO or DRAC
- E. Uninterruptable Power Supplies, UPS
Answer: B,D,E
NEW QUESTION # 49
How can you mount and use an existing CephFS volume?
- A. By configuring clients with the CephFS mount point.
- B. By configuring OSDs with the appropriate storage devices.
- C. By adjusting the CRUSH map to include CephFS pools.
- D. By using the cephfs command-line tool.
Answer: A
NEW QUESTION # 50
Which utility is commonly used to manage and control DRBD devices?
- A. drbdsetup
- B. drbdadm
- C. drbdmon
- D. drbdmeta
Answer: B
NEW QUESTION # 51
Which Pacemaker feature is used to detect and handle split brain scenarios when shared storage is used?
- A. Fencing
- B. Split Brain Detector
- C. Resource rules
- D. Quorum
Answer: B
NEW QUESTION # 52
Which utility is used to resize a GFS2 file system?
- A. mount.gfs2
- B. fsck.gfs2
- C. mkfs.gfs2
- D. gfs2_grow
Answer: D
NEW QUESTION # 53
What is the purpose of managing clustered LVM?
- A. To provide network connectivity for servers
- B. To manage logical volumes on clustered storage
- C. To store and retrieve data from remote block storage devices
- D. To manage file systems on distributed storage
Answer: B
NEW QUESTION # 54
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. echo "1" > /proc/sys/net/ipv4/ip_forward
- B. iptables -t nat -Z
- C. netstat -r
- D. ipmasq -A 192.168.10.1 -A 192.168.10.2 -p tcp --dport www -j DEMASQ
- E. ipvsadmin -L -n
Answer: A
NEW QUESTION # 55
Which of the following can be used as a low level device for DRBD? (Choose TWO correct answers.)
- A. A LVM logical volume
- B. A tape streamer
- C. A rewritable CD
- D. A physical hard disk
- E. A virtual tape library
Answer: A,D
NEW QUESTION # 56
Which of the following are tools or services that manage a Linux Virtual Server (LVS) setup? (Choose TWO correct answers.)
- A. lvproxy
- B. vserverd
- C. ldirectord
- D. keepalived
- E. roundrobind
Answer: C,D
NEW QUESTION # 57
Which of the following statements are true regarding the determination of the capacity of a high availability cluster? (Choose TWO correct answers.)
- A. The overall capacity of all components in the cluster doesn't have to be larger than the resources needed in a regular setup.
- B. Failover clusters can be used to scale a single service beyond the capacity of a single cluster node.
- C. In case of the failure of any component, enough resources must remain to provide all cluster services.
- D. In regular cluster operation, not all resources are used.
- E. 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.
Answer: C,D
NEW QUESTION # 58
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