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Oracle 1z0-821 Exam Practice Questions (P. 5)

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Question #21
Your users are experiencing delay issues while using their main application that requires connections to remote hosts. You run the command uptime and get the flowing output:
1:07am up 346 day(s), 12:03, 4 users, load average: 0.02, 0.02, 0.01
Which command will be useful in your next step of troubleshooting?
  1. A
    ipadm
  2. B
    traceroute
  3. C
    dladm
  4. D
    snoop
  5. E
    arp

Correct Answer:
B
Test the remote connection with traceroute.
The Internet is a large and complex aggregation of network hardware, connected together by gateways. Tracking the route one's packets follow (or finding the miscreant gateway that's discarding your packets) can be difficult. traceroute utilizes the IP protocol `time to live' field and attempts to elicit an ICMP
TIME_EXCEEDED response from each gateway along the path to some host.
This program attempts to trace the route an IP packet would follow to some internet host by launching UDP probe packets with a small ttl (time to live) then listening for an ICMP "time exceeded" reply from a gateway.

Question #22
When upgrading an existing system from Solaris 11 Express to Oracle Solaris 11, what happens to the datalink names?
  1. A
    They follow the default naming convention for the newly installed version.
  2. B
    They maintain their names.
  3. C
    They are called eth#.
  4. D
    They are called el00g#.
  5. E
    They are left unnamed, to avoid conflicts, and need to be renamed after the installation process is complete.

Correct Answer:
A
Network configuration in Oracle Solaris 11 includes
* Generic datalink name assignment Generic names are automatically assigned to datalinks using the net0, net1, netN naming convention, depending on the total number of network devices that are on the system
Note: There is no upgrade path from Oracle Solaris 10 to Oracle Solaris 11. You must perform a fresh installation.

Question #23
You have installed software updates to a new boot environment (BE) and have activated that the booting to the new BE, you notice system errors. You want to boot to the last known good configuration.
Which option would you use on a SPARC system to boot to the currentBE boot environment?
  1. A
    boot –L currentBE
  2. B
    boot –Z rpool/ROOT/currentBE
  3. C
    boot –a Enter the currentBE dataset name when prompted.
  4. D
    boot rpool/ROOT/currentBE
  5. E
    boot –m currentBE
  6. F
    beadm activate currentBE

Correct Answer:
F
You can change an inactive boot environment into an active boot environment. Only one boot environment can be active at a time. The newly activated boot environment becomes the default environment upon reboot.
How to Activate an Existing Boot Environment
1. Use the following command to activate an existing, inactive boot environment: beadm activate beName beName is a variable for the name of the boot environment to be activated.
Note the following specifications.
beadm activate beName activates a boot environment by setting the bootable pool property, bootfs, to the value of the ROOT dataset of the boot environment that is being activated. beadm activate sets the newly activated boot environment as the default in the menu.lst file.
2. Reboot.
The newly activated boot environment is now the default on the x86 GRUB menu or SPARC boot menu.

Question #24
Oracle Solaris 11 limits access to the system with usernames and passwords.
The usernames are held in ___________, and the passwords are held in ___________.
Select the correct pair.
  1. A
    /etc/security/policy.conf /etc/passwd
  2. B
    /etc/passwd /etc/shadow
  3. C
    /etc/security /etc/passwd
  4. D
    /etc/shadow /etc/passwd

Correct Answer:
B
The /etc/passwd file contains basic user attributes. This is an ASCII file that contains an entry for each user. Each entry defines the basic attributes applied to a user.
/etc/shadow file stores actual password in encrypted format for user's account with additional properties related to user password i.e. it stores secure user account information. All fields are separated by a colon (:) symbol. It contains one entry per line for each user listed in /etc/passwd file.

Question #25
_________ serves as the interface between the SMF repository and the user to ensure that a consistent, picture of the repository is presented to the user.
  1. A
    repository.db
  2. B
    service manifest
  3. C
    svc.startd
  4. D
    svc.configd

Correct Answer:
D
SVC.CONFIGD is the repository daemon responsible for maintaining /etc/svc/repository.db. The repository.db must come clean during this integrity check otherwise it is a "no go" for usual boot sequence to run level 3. The repository may get corrupted due to various hardware issues, software bugs, disk write failures, etc.
Note: When svc.configd(1M), the Solaris Repository Daemon, is started, it does an integrity check of the smf(5) repository, stored in /etc/svc/repository.db. This integrity check can fail due to a disk failure, the database file being corrupted either due to a hardware bug, a software bug, or an accidental overwrite. If the integrity check fails, svc.configd will write a message to the console.

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