New Dumps for 306-300 LPIC-3: High Availability and Storage Clusters Exam

dumps2024-04-30T09:32:42+08:00

To receive the LPIC-3 certification, you must have an active LPIC-2 certification. The LPIC-3 High Availability and Storage Clusters certification covers the administration of Linux systems enterprise-wide with an emphasis on high availability systems and storage. The real 306-300 exam consists of 60 multiple-choice and fill-in-the-blank questions, and you have 90 minutes to answer all the questions. The available languages are English and Japanese. We provide the latest LPIC-3: High Availability and Storage Clusters 306-300 exam dumps, which can guarantee you pass. Free LPIC-3: High Availability and Storage Clusters 306-300 exam dumps are available below.

Page 1 of 6

1. Which of the following statements describes fencing resources in a high availability cluster?

Fencing is the automated stop and restart of cluster services that suffer from software errors.

Fencing is the disconnection of a failed cluster node from any other cluster resources.

Fencing is the forwarding of incoming network connections to backend servers.

Fencing is the assignment of services to different cluster nodes to avoid interference of the services.

Fencing is the accounting and limitation of disk usage on shared storage.

2. 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.

True

False

3. Which utility is used to manage the low-level configuration and settings of DRBD devices?

drbdadm

drbdmon

drbdsetup

drbdmeta

4. How can you check the status and configuration of network bonding interfaces using the nmcli command?

nmcli show bonding

nmcli bond show

nmcli interface bonding

nmcli bonding status

5. How can you create and manage Rados Block Devices (RBDs) in Ceph?

By using the ceph-deploy command-line tool.

By configuring OSDs with the desired storage devices.

By interacting with the rados command-line tool.

By adjusting the CRUSH map to include RBD pools.

6. What does the term "split brain" refer to in the context of high availability clusters?

Nodes competing for resources after a failure

Data inconsistency due to replication delays

Failure of the entire cluster

Network partition causing communication issues

7. 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?

Correct

Incorrect

8. Which parameter of vgchange controls whether a volume group is shared within a shared storage cluster? (Specify ONLY the option name without any values or parameters.)

Solution: -c -or- c -or- clustered -or- --clustered

Determine whether the given solution is correct?

Correct

Incorrect

9. Which one of the following should NOT be used as a lowlevel device for DRBD?

A LVM logical volume

A physical hard disk

A EVMS volume

A loop device

10. Which of the following situations can result in a split brain situation in a high availability cluster?

The load balancer of a load balanced cluster fails.

The communication between the cluster nodes is interrupted.

Cluster services are moved between cluster nodes.

More than one node is active in a load balanced cluster.

A cluster node has successfully been fenced.

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11. What are the key concepts of Ceph updates?

Update order, tunables, and features

Update intervals, reliability, and performance

Update compatibility, licensing, and documentation

Update security, monitoring, and automation

12. Which utility is used for monitoring and managing system resources in monit?

smartctl

nvme-cli

apcupsd

monit

13. What is the purpose of configuring high availability aspects of GlusterFS?

To prevent unauthorized access to storage volumes.

To ensure continuous availability of storage services.

To optimize storage performance for specific workloads.

To enable replication of data across multiple storage nodes.

14. What is true for a virtual IP address in the context of keepalived? (Choose TWO correct answers.)

The distinct IP addresses of all backend servers are called virtual IP addresses.

Every server running keepalived has exactly one virtual IP address and cannot have any additional virtual IP addresses.

The virtual IP address is the address to which incoming connections are made in order to reach the load balancer.

keepalived uses VRRP to ensure the availability of the virtual IP address.

Within the whole LVS cluster managed by keepalived, the virtual IP address never appears on any network interface.

15. When running a Linux Virtual Server (LVS) cluster, what is the purpose of a nanny process?

Each nanny process checks the state of one configured service on one real server, and tells LVS if the service on that real server is malfunctioning.

The nanny process powers off a nonfunctional backend server.

The nanny process restarts the daemon of a failed service on a real server node.

The nanny process changes the IP routing table in the Linux kernel according to the LVS configuration.

16. Which of the following statements is true about clustered file systems?

They are only used for distributed file storage.

They cannot be maintained and troubleshooted.

They provide concurrent access to shared file systems in a cluster.

They are limited to specific Linux distributions.

17. Which of the following are tools or services that manage a Linux Virtual Server (LVS) setup? (Choose TWO correct answers.)

keepalived

ldirectord

lvproxy

roundrobind

vserverd

18. In a Pacemaker cluster, which one of the following commands shows the right syntax for fencing the node on port 3 using the APC rack PDU device which can be found at IP address 192.168.1.145?

apc_stonith -a 192.168.1.145 -l apc -n 3 -v -o shutdown -r now

fence_apc -a 192.168.1.145 -l apc -p apc -n 3 -v -o shutdown -r now

fence_apc -a 192.168.1.145 -l apc -p apc -n 3 -v -o reboot

apc_stonith -a 192.168.1.145 -l apc -p apc -n 3 -v -o reboot

19. Using Linux Virtual Server (LVS) without any additional tools provides which of the following features?

Balancing network connections across several backend servers.

Automatically taking over the services of failed nodes.

Restarting failed services on the backend servers.

Checking the integrity of services on backend servers.

Starting and stopping backend servers as needed.

20. What is the purpose of mdadm monitoring and reporting?

To track the CPU usage of the RAID devices.

To monitor the temperature of the RAID disks.

To receive notifications about RAID array failures.

To optimize the performance of the RAID array.

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21. Which utility is used to manage software RAID devices on Linux?

smartctl

fdisk

lvm

mdadm

22. What does the /proc/mdstat file contain?

Information about the system's memory usage.

Details about the RAID devices and their status.

The configuration file for the mdadm utility.

A log of disk check operations performed on the array.

23. Which command-line utility is used to manage the fencing devices in a Pacemaker cluster?

stonith_admin

stonith

sbd

pcs

24. How can you configure traffic shaping and control in Linux?

By modifying the /etc/network/interfaces file.

By using the nmcli command with appropriate options.

By configuring traffic shaping parameters in the switch.

By using the ip command with appropriate options.

25. Which utility is used to resize a GFS2 file system?

mkfs.gfs2

mount.gfs2

fsck.gfs2

gfs2_grow

26. Which bond mode in network bonding provides fault tolerance by using one active interface and one standby interface?

Active-Backup

Balance-TLB

Balance-ALB

802.3ad

27. Which of the following statements is true regarding journals of a GFS2 filesystem?

Each GFS2 filesystem has exactly one journal.

Once a GFS2 filesystem is created, the number of journals cannot be changed.

Every node that simultaneously mounts the filesystem requires its own GFS2 journal.

Journals were heavily used in GFS and are deprecated and optional in GFS2.

The GFS Cluster Journal Daemon, GCJD, handles the journaling in a GFS2 cluster.

28. Which one of the following is NOT a required component for running an OCFS2 filesystem resource in a Pacemaker cluster?

A clone resource for the OCFS2 file system.

A shared storage device accessible by all nodes using the OCFS2 filesystem.

The distributed lock manager (DLM).

The cluster logical volume manager (CLVM).

The O2CB service.

29. Which of the following configuration settings specify that keepalived is to use the round robin algorithm?

lb_mode rr

lb_algo rr

loadbalancer_mode=rr

algorithm=round robin

lb_algorithm=rr

30. Load Balanced Clusters commonly utilize which of the following algorithms to distribute incoming traffic among backend servers?

ACLs

VRRP

Syncd

Connection scheduling algorithms

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31. Which of the following is not a device classes are commonly used STONITH devices?

CPU frequency management tools

Remote Management Services like iLO or DRAC

Blade Control Devices

Uninterruptable Power Supplies, UPS

32. In case one service in a Pacemaker cluster depends on another service running on the same node, which score should be assigned to the constraint describing that dependency?

-1

FORCE

INFINITY

33. How can you configure VLANs on network interfaces?

By modifying the /etc/network/interfaces file.

By using the nmcli command with appropriate options.

By configuring VLANs in the switch configuration.

By running the ifenslave command with VLAN parameters.

34. What is the purpose of restoring and verifying the integrity of a Ceph cluster after an outage?

To repair data corruption in storage pools.

To ensure that all OSDs are functioning properly.

To synchronize the metadata between MDS instances.

To rebalance the data across OSDs.

35. What is the purpose of monitoring S.M.A.R.T values using smartmontools?

To monitor the system's CPU usage.

To monitor the system's memory usage.

To monitor the health of storage devices.

To monitor network bandwidth usage.

36. Which load balancing algorithm considers the load and capacity of backend servers to distribute traffic efficiently?

NAT (Network Address Translation)

Direct Routing

Tunneling

Dynamic Round Robin

37. Which one of the following options represents a valid declaration of a backend server with HAProxy?

host server_x 10.1.0.1:80 cookie server_x

backend server_x 10.1.0.1:80

server server_x 10.1.0.1:80 check

pool server_x 10.1.0.1:80

38. What is the purpose of RSTP (Rapid Spanning Tree Protocol) in switch configuration for high availability?

To provide load balancing across multiple network interfaces.

To ensure redundancy and quick recovery in case of network failures.

To manage VLANs and network segmentation.

RSTP is not related to switch configuration.

39. Which of the following Messaging Layers are supported by Pacemaker? (Choose TWO correct answers.)

Heartbeat

OpenAIS

DRBD

SCMP

Slurm

40. What is the purpose of ACLs (Access Control Lists) in the context of Load Balanced Clusters?

Load balancing algorithm selection

Backend server configuration

IP address failover

Implementing access control rules

Page 5 of 6

41. HAProxy is commonly used as a load balancer in Load Balanced Clusters.

What is the primary function of HAProxy?

Backend server networking

Connection scheduling algorithms

Load balancing and proxying

IP address failover

42. What is LVM (Logical Volume Manager)?

A file system used in Linux for managing storage devices.

A utility for partitioning hard drives into multiple logical volumes.

A software layer that provides flexible management of disk space.

A command-line tool for creating RAID arrays.

43. Which utility is used to create device maps for multipathed devices in Linux?

tgtadm

kpartx

multipath

pvmove

44. How does the command to add a new resource to a Pacemaker cluster using crm begin?

crm manage cluster

crm configure primitive

crm service add

crm configure resource

crm resource new

45. Which command is used to create a new physical volume in LVM?

pvcreate

vgcreate

lvcreate

pvdisplay

46. What is the purpose of the drbdmon utility?

To manage DRBD networking connections

To monitor the status of DRBD devices

To configure automatic recovery and error handling

To verify the integrity of a DRBD device

47. How can you add a new device to an existing RAID array?

Using the mdadm command with the --add option.

By running the fsck utility on the array.

Using the lvm command to extend the array.

By modifying the /proc/mdstat file manually.

48. Which of the following commands displays only the resources of the cluster information base of a pacemaker cluster?

cibquery -o resources

cibadmin -R

cibadmin -Q -o resources

cibquery -L resources

cib_admin -L resources

49. Which of the following commands can be used to safely test and preview Pacemaker configuration changes? (Choose TWO correct answers.)

crm_test

crm_simulate

crm_dryrun

crm_lab

crm_shadow

50. What is the purpose of the nvme-cli utility?

To monitor network interfaces.

To configure NVMe storage devices.

To manage power supply events.

To monitor system memory usage.

Page 6 of 6

51. What is the purpose of a Storage Area Network (SAN)?

To provide network connectivity for servers

To store and retrieve data from remote block storage devices

To connect multiple servers together in a cluster

To manage file systems on distributed storage

52. How can you recover a RAID device after a failure?

By replacing the failed disk and running the mdadm --rebuild command.

By reformatting the RAID device and rebuilding the array from scratch.

By running the fsck utility on the array to fix any disk errors.

By modifying the /proc/sys/dev/raid/ file to restore the array.

53. Which of the following statements are true regarding a load balancer? (Choose TWO correct answers.)

Failover clusters are not operational without at least one dedicated load balancer.

All response packages sent from a backend server to a client must pass through the load balancer.

The load balancer is usually deployed on one of the backend servers.

Load balancers may be able to analyze traffic.

All incoming connections to the cluster services are received by the load balancer.

54. In the command: crm configure ____ http-after-ipv4 Mandatory: VHost1IPv4 HTTPD which missing word is required in order to ensure that the service HTTPD is always started after the service VHost1IP?

Solution: order -or- ORDER

Determine whether the given solution is correct?

Correct

Incorrect

55. Which actions should be taken in a load balanced cluster in order to protect the load balancer against outages?

Load balancers cannot be protected against outages which is why they should always be built on dedicated hardware.

No actions are necessary as a load balancer cannot become a single point of failure.

Two or more load balancers should be deployed as a cascade that passes packets from one to the other.

Two load balancers should be deployed as a failover cluster.

Load balancers are used for performance and scalability reasons only and cannot be used to archive high availability clusters.

56. What is the purpose of configuring system shutdown at specific UPS events?

To prevent data loss during power outages.

To optimize system performance during high resource usage.

To automatically restart the system after a hardware failure.

To extend the lifespan of storage devices.

57. Which command-line utility is used to manage the Pacemaker cluster configuration database?

pcs

crm

crm_mon

cibadmin

58. In a cluster with shared-nothing architecture, how is data shared between nodes?

Nodes share a common disk

Data is replicated across all nodes

Each node has its own copy of data

Data is distributed across multiple disks

59. What is the purpose of placement groups (PGs) in a Ceph cluster?

To distribute data across OSDs for redundancy and performance.

To manage access control for different storage pools.

To synchronize data between MDS instances in a CephF

To monitor the health and availability of MON nodes.

60. What is the purpose of fencing in a high availability cluster?

Prevent failed nodes from interfering with the remaining intact part of the cluster.

Ensure a consistent assignment of all network connections from a client to the same cluster server.

Define constraints on which services may run on the same cluster node.

Enforce storage quota and other resource limitations for each service provided by the cluster.

Provide multi-tenancy cluster configuration for cloud computing.

New Dumps for 306-300 LPIC-3: High Availability and Storage Clusters Exam

New Dumps for 306-300 LPIC-3: High Availability and Storage Clusters Exam

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