306-300 Exam Training Practice Tests (Lpi LPIC-3 Exam 306: High Availability and Storage Clusters)]

Question 1

What is the task of the Cluster Logical Volume Manager, CLVM?

A. It allows several nodes to share file system locks in order to access the same files simultaneously. B. It segments the cluster nodes into several logical groups that are always fenced together. C. It balances incoming TCP connections to a logical service to several backend nodes. D. It makes logical volumes on shared storage available to all cluster nodes.

Correct Answer: D

Question 2

How can you add additional storage capacity to a GlusterFS cluster?

A. By creating new volumes B. By adding bricks to existing volumes C. By creating new trusted storage pools D. By increasing the number of peers in the cluster

Correct Answer: B

Question 3

Which resource class in Pacemaker is used to manage the power control of cluster nodes?

A. LSB B. OCF C. STONITH D. Systemd

Correct Answer: C

Question 4

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

A. No actions are necessary as a load balancer cannot become a single point of failure. B. Load balancers cannot be protected against outages which is why they should always be built on dedicated hardware. C. Two or more load balancers should be deployed as a cascade that passes packets from one to the other. D. Two load balancers should be deployed as a failover cluster. E. Load balancers are used for performance and scalability reasons only and cannot be used to archive high availability clusters.

Correct Answer: D

Question 5

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

Correct Answer: A

Question 6

What is BGP (Border Gateway Protocol)?

A. A protocol used to exchange routing information between autonomous systems. B. BGP is not relevant to network high availability. C. A protocol for establishing secure connections between networks. D. A protocol for managing VLANs in a network infrastructure.

Correct Answer: A

Question 7

What is the role of the "Secondary" node in a DRBD setup?

A. It is the node responsible for initiating replication. B. It is the node that handles split brain situations. C. It is the node that acts as a backup for the "Primary" node. D. It is the node that stores the replicated data.

Correct Answer: C

Question 8

In keepalived, what is configured by the configuration option sorry_server?

A. The hostnames of the servers that, despite the remaining configuration, should always be scheduled by the Serial Operation Round Robin algorithm. B. The default virtual host that is assigned to incoming HTTP requests missing a Host: header before forwarding them to a backend server. C. The address of a server to which requests are redirected in case no real server is available. D. The addresses of backend servers that were overloaded in the past and should be scheduled with a reduced priority. E. The addresses of backend servers that should not get assigned any new connections.

Correct Answer: C

Question 9

What is the name and path of the configuration file for the O2CB cluster that coordinates the nodes using OCFS2 filesystems?

A. /etc/ocfs/cluster.conf B. /etc/ocfs2.conf C. /etc/cluster.conf D. /etc/ocfs2/cluster.conf

Correct Answer: D

Lpi LPIC-3 Exam 306: High Availability and Storage Clusters - 306-300 Exam Practice Test