LPIC 3 High Availability Clustering Quiz

1. Which file typically contains Pacemaker cluster configuration?

/etc/corosync/corosync.conf

/etc/pacemaker/cluster.xml

/var/lib/pacemaker/cib.xml

/opt/cluster/config.conf

2. Which protocol does Corosync use for cluster communication?

UDP multicast or unicast

HTTP only

FTP

SSH tunneling exclusively

3. What is the purpose of cluster 'monitoring' and 'health checks'?

Continuously verify node and resource status

Encrypt all cluster communications

Store cluster backup copies

Increase CPU performance

4. In DRBD replication, what is a 'split-brain scenario'?

Both nodes believe they are primary

Secondary node stops responding

Primary node loses all data

Network latency exceeds threshold

5. What does 'resource migration' accomplish in a cluster?

Moves a service from one node to another

Updates cluster software version

Compresses cluster logs

Changes node hostname

6. Which command is used to check cluster status in Pacemaker?

Pcs status or crm_mon

Ps aux

Ifconfig

Journalctl

7. What is 'graceful shutdown' in cluster terminology?

Orderly resource migration before node stops

Force kill all processes

Immediate power off

Network cable removal

8. In a virtual IP (VIP) failover scenario, which component manages the address?

Pacemaker resource agent

DHCP server

DNS resolver

Firewall rule

9. How does a cluster detect a node failure?

Loss of heartbeat messages for a timeout period

Manual operator notification

Email alert from sysadmin

Disk space check failure

10. What is 'resource stickiness' in Pacemaker?

Preference for resource to stay on current node

Time to detect node failure

Bandwidth allocation priority

Encryption strength for cluster traffic

11. What is the primary purpose of heartbeat communication in a high availability cluster?

To detect node failures and trigger failover

To transfer data between cluster nodes

To authenticate cluster members

To balance network traffic

12. In DRBD, what is 'synchronous replication'?

Data written to both nodes before ack

Replication at scheduled intervals only

One-way data transfer

Asynchronous background sync

13. What does 'failover' mean in a cluster context?

Automatic resource migration when a node fails

Manual restart of a service

Backup of cluster configuration

Network redundancy setup

14. Which tool is used to manage Corosync configuration files?

Corosync-cfgtool or pcs

Systemctl only

Iptables

Netstat

15. What is the function of a quorum in cluster voting?

To ensure a majority can make cluster decisions

To encrypt all cluster traffic

To replicate data across nodes

To monitor CPU usage

16. In Pacemaker, what is a 'resource constraint'?

A rule defining where and how resources run

A hardware limit on node capacity

A network bandwidth restriction

A storage quota per node

17. Corosync is primarily used for which cluster function?

Cluster messaging and membership

Database replication

Load balancing traffic

Virtual machine migration

18. What does STONITH stand for in cluster fencing?

Shoot The Other Node In The Head

System Task On Node In The Host

Storage Transfer Over Network In The Hub

Synchronize Timing On Nodes In The Home

19. Which cluster resource manager is commonly used in LPIC 3 environments?

Pacemaker

Docker Swarm

Kubernetes only

HAProxy alone

20. In a two-node cluster, what condition is called 'split-brain' and how is it prevented?

Both nodes become master; use quorum or fencing

One node stops responding; use keepalive

Network latency increases; use compression

Memory cache conflicts; use synchronization