S2000-025 Sample Questions

S2000-025 Sample Questions & Answers

Setup, operations, performance tuning and problem determination tie for the most weight, spanning user environment management, system backups, login troubleshooting, alongside LVM concepts, basic security permissions, IP and name resolution, and AIX 7.3 changes.

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Showing 10 of 20 free samples.

  1. Question 1Beginner

    Operations · Scheduling execution of commands using cron, at, and batch

    True or False: The at command in AIX is designed for scheduling jobs that need to run on a recurring basis, such as daily or weekly tasks.

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    Correct answer: B

    This statement is false. The at command is used to schedule a command or script to be executed once at a specific time in the future. For recurring tasks, the cron daemon and crontab files are used.

  2. Question 2Advanced

    Storage Management · Manage LVM (volume groups, logical volumes)

    An administrator is configuring LVM mirroring for a new logical volume datavg_lv to protect against a single disk failure. The volume group datavg consists of three identical physical volumes: hdisk1, hdisk2, and hdisk3. To achieve the maximum possible data redundancy, what is the best practice for placing the mirrored copies of the logical partitions?

    Show answer & explanation

    Correct answer: B

    To achieve maximum redundancy, each copy of a logical partition should reside on a different physical volume. By creating three copies of the logical volume (mklv -c 3 ...) and ensuring the volume group has a strict inter-disk allocation policy, LVM will place one copy on hdisk1, one on hdisk2, and one on hdisk3. This configuration can survive the failure of any two disks.

  3. Question 3Intermediate

    Storage Management · Manage file systems

    A file system /data is full. An administrator has successfully added a new physical volume hdisk5 to the datavg volume group. What are the next two commands, in the correct order, required to increase the size of the /data file system by 10 Gigabytes?

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    Correct answer: C

    The correct procedure is to first increase the size of the underlying logical volume (datalv) using the extendlv command. Once the logical volume has been expanded, the chfs command is used to grow the JFS2 file system to utilize the newly available space on the logical volume.

  4. Question 4Beginner

    Storage Management · Explain the LVM terminology

    In the AIX Logical Volume Manager (LVM) architecture, which component represents the smallest contiguous unit of disk space on a physical volume that can be allocated to a logical volume?

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    Correct answer: C

    A Physical Partition (PP) is the fundamental building block of LVM storage on a physical volume (disk). The size of the PPs is defined when the volume group is created. Logical Volumes are created from a collection of PPs, and there is typically a one-to-one mapping between a Logical Partition (LP) and a Physical Partition (PP).

  5. Question 5Advanced

    System Security · Explain file permissions

    A security audit requires a report of all files on the system that have the SUID bit set and are owned by the root user. These files could potentially be exploited to gain unauthorized root access. Which find command will correctly generate this specific report?

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    Correct answer: C

    The correct command is find / -user root -perm -4000 -ls. Let's break it down: find / starts the search from the root directory. -user root specifies that the file must be owned by root. -perm -4000 searches for files where the SUID bit (octal value 4000) is set. The hyphen prefix means that at least this permission bit must be set. -ls provides a detailed listing of the found files.

  6. Question 6Advanced

    System Security · Explain file permissions

    An administrator must configure a high-security environment for a financial application. The application data is in /appdata, owned by appuser:appgroup.

    Requirements:

    1. appuser must have read and write permissions.
    2. Other members of appgroup must have read-only access.
    3. A specific user, auditor, who is not in appgroup, requires read-only access for compliance checks.
    4. No other users should have any access.

    Which method correctly configures permissions to meet all these specific, multi-faceted requirements?

    Show answer & explanation

    Correct answer: B

    This scenario requires more granular control than standard UNIX permissions can provide. The correct approach is to use a combination: First, set the base permissions to rw-r----- (chmod 640) on the files. This satisfies requirements 1, 2, and 4. Then, use an Access Control List (ACL) with acledit or aclput to add a specific entry granting read (r--) access to the user auditor. ACLs are designed for these kinds of exceptions.

  7. Question 7Intermediate

    System Security · Manage users and groups

    An administrator needs to create a new user named 'jdoe'. The requirements are that the user's primary group is 'staff', they are also a member of the 'projectx' and 'dev' groups, and their login shell is /usr/bin/ksh. Which mkuser command correctly accomplishes all these requirements in a single line?

    Show answer & explanation

    Correct answer: A

    The mkuser command creates new user accounts. The attributes are specified as attribute=value pairs. pgrp=staff sets the primary group. groups=projectx,dev sets the concurrent group set the user belongs to. shell=/usr/bin/ksh sets the user's login shell. This single command fulfills all the stated requirements.

  8. Question 8Intermediate

    Network Management · Manage hosts and name resolution order

    An AIX LPAR can successfully ping external IP addresses but cannot resolve any hostnames, such as www.ibm.com. Internal hostnames listed in /etc/hosts resolve correctly. Which configuration file is the most likely source of the problem?

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    Correct answer: C

    The ability to ping IP addresses confirms network connectivity. The ability to resolve names from /etc/hosts confirms local resolution is working. The failure to resolve external hostnames points directly to a problem with the Domain Name System (DNS) configuration. The /etc/resolv.conf file is where the IP addresses of the DNS servers are defined. A missing or incorrect entry in this file is the most common cause of this issue.

  9. Question 9Intermediate

    Network Management · Manage hosts and name resolution order

    To control the order in which an AIX system attempts name resolution (for example, to check the local /etc/hosts file before querying a DNS server), an administrator must configure the hosts entry in which file?

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    Correct answer: D

    The /etc/netsvc.conf file is used to specify the ordering of name resolution services. An entry like hosts = local, bind tells the system to first check the local /etc/hosts file (local) and then, if the name is not found, query the DNS server specified in /etc/resolv.conf (bind).

  10. Question 10Beginner

    Network Management · Mount and export NFS

    An administrator has just added a new directory export to the /etc/exports file on an NFS server. What is the proper command to make this new export immediately available to NFS clients without rebooting the server?

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    Correct answer: B

    The exportfs command manages the list of exported NFS directories. The -a flag instructs the command to export all directories listed in the /etc/exports file, effectively re-reading the file and applying any new changes without needing a service restart or system reboot.

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