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Ability Ultimate Exam
Question 1. In AIX LPAR configuration, which command displays the current partition’s processor entitlement? A) lparstat –i B) lssrc -a C) lsmap -all D) lsdev -C Answer: A Explanation: lparstat –i reports LPAR configuration details, including the processor entitlement for the active partition. Question 2. Which Solaris feature provides OS-level virtualization similar to Linux containers? A) Zones B) LDOMs C) VMs D) Jails Answer: A Explanation: Solaris Zones are OS-level containers that isolate processes, networking, and file systems within a single Solaris instance. Question 3. In HP-UX, an nPartition is primarily used for: A) Network namespace isolation B) Hardware partitioning of CPUs and memory C) Virtual memory paging D) Disk mirroring Answer: B Explanation: nPartitions divide a server’s physical resources (CPU, memory, I/O) into separate logical machines.
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Question 4. Which virtualization layer is native to IBM Power Systems for managing logical partitions? A) PowerVM B) KVM C) Xen D) Hyper-V Answer: A Explanation: PowerVM is IBM’s hypervisor for creating and managing LPARs on Power hardware. Question 5. In Linux, which kernel parameter controls the maximum number of shared memory segments a process may attach? A) shmmax B) shmall C) semmsl D) msgmax Answer: A Explanation: /proc/sys/kernel/shmmax defines the maximum size (in bytes) of a single shared memory segment. Question 6. To increase the number of System V semaphores available on a Solaris system, you would modify which file? A) /etc/default/init B) /etc/system C) /etc/security/limits.conf D) /etc/sysctl.conf Answer: B Explanation: Solaris kernel parameters, including semaphore limits, are set in /etc/system.
Ability Ultimate Exam
A) Reduce context-switch overhead B) Increase the size of the swap file C) Decrease TLB misses for large memory workloads D) Enable kernel preemption Answer: C Explanation: HugePages allocate larger memory pages, reducing the number of TLB entries needed and improving performance for memory-intensive applications. Question 11. Which Linux security module provides Mandatory Access Control (MAC) capabilities? A) SELinux B) PAM C) sudo D) LDAP Answer: A Explanation: SELinux implements MAC policies that restrict how processes can access system resources. Question 12. To integrate UNIX authentication with Active Directory using Kerberos, which component is typically configured? A) NFS B) SSSD C) NIS D) RADIUS Answer: B Explanation: SSSD (System Security Services Daemon) can be set up to use Kerberos for AD authentication. Question 13. In Solaris, the IP Filter (ipfilter) firewall rule to block inbound TCP traffic on port 22 is:
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A) block in quick on eth0 proto tcp from any to any port = 22 B) deny in all from any to any port = 22 tcp C) block in all from any to any port = 22 tcp D) drop in quick from any to any port = 22 tcp Answer: C Explanation: block in all from any to any port = 22 tcp denies inbound SSH connections on port 22. Question 14. Which CIS benchmark control focuses on disabling unnecessary services on a UNIX host? A) 1.1 – Filesystem Configuration B) 5.2 – Service Management C) 3.4 – Logging and Auditing D) 2.3 – Network Configuration Answer: B Explanation: CIS control 5.2 addresses service management, ensuring only required services are enabled. Question 15. In a PowerHA cluster, the primary purpose of a quorum device is to: A) Store application data backups B) Provide shared storage for all nodes C) Prevent split-brain by acting as a tie-breaker vote D) Load-balance network traffic Answer: C Explanation: A quorum device supplies an additional vote to determine cluster majority, avoiding split-brain scenarios. Question 16. Synchronous replication differs from asynchronous replication in that:
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B) bpftool C) perf top D) bcc-tools cpuacct Answer: D Explanation: The cpuacct script from bcc-tools uses eBPF to provide per-process CPU utilization similar to top. Question 20. In Ansible, which module is used to manage LVM logical volumes on a Linux host? A) lvol B) filesystem C) mount D) lvcreate Answer: A Explanation: The lvol module creates, removes, or resizes LVM logical volumes. Question 21. Which Korn shell (ksh) built-in command returns the exit status of the most recent pipeline? A) $? B) $! C) $* D) $# Answer: A Explanation: $? holds the exit status of the last executed command or pipeline. Question 22. Live patching on Oracle Linux using Ksplice allows: A) Kernel module updates without reboot B) Automatic filesystem checks at boot C) Dynamic CPU frequency scaling
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D) Real-time memory compression Answer: A Explanation: Ksplice applies kernel patches while the system is running, avoiding reboots. Question 23. In Prometheus, which exporter is best suited for gathering Solaris kernel metrics via DTrace? A) node_exporter B) solaris_exporter C) dtrace_exporter D) snmp_exporter Answer: C Explanation: dtrace_exporter leverages DTrace scripts to expose Solaris kernel metrics to Prometheus. Question 24. The iostat field “%util” indicates: A) Percentage of CPU time spent in I/O wait B) Percentage of time the device was busy processing requests C) Percentage of total I/O bandwidth used D) Percentage of read operations versus write operations Answer: B Explanation: %util shows how much of the measurement interval the device was actively servicing I/O. Question 25. Which command on Solaris displays active network interfaces and their IP addresses? A) ifconfig -a B) netstat -i C) ipadm show-if D) dladm show-phys
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Explanation: mpathconf assists in configuring device-mapper multipathing for redundant storage paths. Question 29. Which kernel parameter governs the maximum number of file descriptors a process may open? A) fs.file-max B) fs.nr-open C) fs.file-max D) kernel.max-files Answer: B Explanation: /proc/sys/fs/nr_open defines the ceiling for open file descriptors per process. Question 30. In a PowerHA environment, the “fencing” operation typically involves: A) Restarting the failed node’s services remotely B) Isolating the node’s access to shared storage C) Rebalancing network traffic across nodes D) Synchronizing clocks via NTP Answer: B Explanation: Fencing (I/O fencing) cuts off a failed node’s ability to access shared disks, preventing data corruption. Question 31. Which command on AIX creates a mirrored logical volume? A) mklv -y lvname -t mirror -l 2 hdisk0 hdisk B) lvmcreate -m -s 2 lvname C) mkvg -y vgname hdisk0 hdisk D) mirrorlv -c lvname hdisk0 hdisk Answer: A Explanation: mklv with -t mirror and specifying two disks creates a mirrored LV.
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Question 32. To enforce password complexity via PAM on a Solaris system, which module is edited? A) pam_unix.so B) pam_passwdqc.so C) pam_pwcheck.so D) pam_cracklib.so Answer: D Explanation: pam_cracklib.so provides checks for password length, complexity, and reuse. Question 33. In a Kubernetes environment running on Solaris Zones, which component abstracts the underlying host’s CPU resources? A) kube-proxy B) kube-scheduler C) kubelet D) cgroup manager Answer: D Explanation: cgroups (control groups) allocate CPU, memory, and I/O resources to containers, independent of the host OS. Question 34. The dmesg command on Linux is most useful for: A) Viewing kernel ring buffer messages after boot B) Displaying current network routes C) Listing mounted filesystems D) Showing process tree hierarchy Answer: A Explanation: dmesg prints the kernel’s message buffer, often containing hardware detection and driver messages.
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A) mode= B) mode= C) mode= D) mode= Answer: B Explanation: mode=1 corresponds to active-backup bonding, where one interface is primary and the other takes over on failure. Question 39. The syslog-ng configuration directive that defines where logs are sent is called: A) source B) destination C) filter D) log_path Answer: B Explanation: In syslog-ng, a destination block specifies the target (file, remote server, etc.) for log messages. Question 40. Which command on AIX displays the current IPC semaphore limits? A) ipcs -s B) sysvshm -l C) lparstat –i D) semctl -a Answer: A Explanation: ipcs -s lists System V semaphores, including the current limits. Question 41. In Solaris, the fsck -F ufs -y /dev/dsk/c0t0d0s0 command performs: A) A forced check and automatic repair of a UFS filesystem B) A read-only verification of an ZFS pool
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C) A scan for bad blocks on a raw disk D) A defragmentation of the filesystem Answer: A Explanation: -y answers “yes” to all prompts, and -F ufs specifies the UFS filesystem type. Question 42. Which of the following is a characteristic of a real-time scheduling class in Linux? A) Processes are scheduled strictly by priority without time slicing B) All processes receive equal CPU time slices C) Scheduler uses a round-robin algorithm only D) It is the default scheduling class for normal user processes Answer: A Explanation: Real-time classes (SCHED_FIFO, SCHED_RR) give higher-priority tasks deterministic CPU access, often without time slicing for FIFO. Question 43. In an Ansible playbook, the become: true directive is used to: A) Execute tasks as the root user via sudo B) Run tasks only on hosts that are up C) Enable idempotent behavior D) Transfer files using SCP instead of SFTP Answer: A Explanation: become: true escalates privilege, typically invoking sudo to run tasks as root. Question 44. Which tool can be used to analyze a Linux kernel core dump generated by crash? A) gdb B) kdump C) makedumpfile
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Explanation: sshd_config can set MaxSessions or AllowUsers to restrict simultaneous connections. Question 48. In a Linux LVM setup, the command vgextend vg01 /dev/sdb performs: A) Adds a new physical volume to an existing volume group B) Extends a logical volume by 1 GB C) Creates a new volume group named vg D) Mirrors the volume group across two disks Answer: A Explanation: vgextend incorporates an additional PV (/dev/sdb) into the volume group vg01. Question 49. Which of the following best describes the purpose of the ethtool utility on Linux? A) Configuring IP addresses B) Managing Ethernet driver settings and diagnostics C) Monitoring CPU temperature D) Adjusting kernel scheduler parameters Answer: B Explanation: ethtool queries and changes NIC driver features such as speed, duplex, and offload options. Question 50. The ps -ef | grep -w "oracle" command is useful for: A) Listing all processes owned by the oracle user B) Displaying the file system usage of Oracle binaries C) Searching the kernel log for Oracle-related messages D) Checking network sockets opened by Oracle processes Answer: A
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Explanation: ps -ef shows all processes; piping to grep -w "oracle" filters lines containing the exact word “oracle”. Question 51. Which of the following is a recommended practice when configuring NTP on a Solaris cluster? A) Use a single local hardware clock as the source for all nodes B) Configure each node with a different external NTP server to avoid single point of failure C) Disable NTP and rely on manual clock adjustments D) Set the NTP poll interval to 1 second for maximum accuracy Answer: B Explanation: Using multiple NTP sources provides redundancy and prevents time drift if one server fails. Question 52. In a Veritas Volume Manager (VxVM) environment, the command vxassist -g diskgroup adddisk /dev/rdsk/c0t2d0 does what? A) Adds a new physical disk to the specified disk group B) Creates a mirrored volume across two disks C) Resizes an existing volume by 10 GB D) Deletes the specified disk from the disk group Answer: A Explanation: vxassist adddisk incorporates a new disk into the given VxVM disk group. Question 53. Which SELinux mode logs policy violations but does not enforce them? A) enforcing B) permissive C) disabled D) targeted Answer: B
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Explanation: dmesg -s prints the size (in bytes) of the kernel’s message buffer. Question 57. When using rsync to synchronize a large directory tree between two AIX servers, which option ensures that hard links are preserved? A) -H B) -p C) -a D) -l Answer: A Explanation: The -H flag tells rsync to preserve hard links during transfer. Question 58. In Solaris, the svcadm enable network/ssh command is used to: A) Start the SSH service managed by SMF B) Add a new SSH key to authorized_keys C) Restart the network interface eth D) Disable the SSH daemon Answer: A Explanation: svcadm enable activates an SMF service, in this case the SSH server. Question 59. Which Linux kernel feature allows a process to lock a range of memory to prevent it from being swapped out? A) mlockall() B) swapoff C) vm.swappiness D) O_DIRECT Answer: A Explanation: mlockall() (or mlock) pins memory pages in RAM, ensuring they stay resident.
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Question 60. The pfctl -d command on OpenBSD (and macOS) does what? A) Disables the packet filter firewall B) Dumps the current firewall ruleset C) Enables debugging output for PF D) Deletes all firewall rules Answer: A Explanation: -d disables PF, effectively turning off the firewall. Question 61. In a Kubernetes deployment running on Solaris Zones, which object defines the desired number of pod replicas? A) Service B) Deployment C) ConfigMap D) StatefulSet Answer: B Explanation: A Deployment specifies replica count and manages rolling updates for pods. Question 62. To configure a multipath device with round-robin path selection on Linux, which policy should be set? A) service_time B) round_robin C) multibus D) failover Answer: B Explanation: The round_robin policy distributes I/O evenly across all available paths. Question 63. Which command on AIX displays the current CPU utilization per logical CPU?
