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Oracle Certification
1Z0-821 Exam
Oracle.1Z0-821.v2022-11-01.q191 Dumps

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Question 86

Which two are true about accounts, groups, and roles in the Solaris user database?

A.All Solaris user accounts must have a unique UID number.
B.A Solaris account name may be any alphanumeric string, and can have amaximum length of 8characters.
C.Account UID numbers 0-09 are system-reserved.
D.The GID for an accountdetermines the default group ownership of new files created bythataccount.
E.The groupsthat an account is a member of are determined by the entries in the /etc/groupfile.

Correct Answer: A,B

A: Solaris uses a UID (User ID) to identify each user account. The UID is a unique number assigned to each user. It is usually assigned by the operating system when the account is created. B:In Solaris the account name can include any alphanumeric string (and . _ -). The maximum length is 8 characters.
Reference: How to Modify a UID in Solaris

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Question 87

You want to delete the IPv4 address on the interface net3. Which command should you use?

A.ipadm delete-ip net3/v4
B.ipadm down-addr net3/v4
C.ipadm disable-if net3/v4
D.ipadm delete-vni net3/v4
E.ipadm delete-addr net3/v4
F.ipadm deiete-ipv4 ner3/v4

Correct Answer: E

The ipadm delete-addr subcommand removes addresses from interfaces.
To remove an address from the IPMP group, type the following command:
# ipadm delete-addr addrobj
The addrobj uses the naming convention inder-interface/user-string.
Reference: Oracle Solaris Administration: Network Interfaces and Network Virtualization

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Question 88

Oracle Solaris 11 kernel encounters a fatal error, and it results in a system panic.
What type of file does this generate?

A.a.out
B.objdump
C.core dump
D.tape dump
E.crash dump

Correct Answer: C

Explanation/Reference:
Explanation:
A kernel panic is a type of error that occurs when the core (kernel) of an operating system receives an instruction in an unexpected format or when it fails to handle properly. A kernel panic can also follow when the operating system can't recover from a different type of error. A kernel panic can be caused by damaged or incompatible software or, more rarely, damaged or incompatible hardware.
When a server kernel panics it abruptly halts all normal system operations. Usually, a kernel process named panic() outputs an error message to the console and stores debugging information in nonvolitile memory to be written to a crash log file upon restarting the computer. Saving the memory contents of the core and associated debugging information is called a "core dump."

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Question 89

Identify three options that describe the new Oracle Solaris 11 zone features.

A.There are boot environments for zones.
B.Administrators can delegate common administration tasks by using RBAC.
C.Oracle Solaris 11 supports Solaris 8, 9, and 10 branded zones.
D.You can migrate a physical Solaris 10 system and its non-global zones to a solaris10 branded zone running on an Oracle Solaris 11 system.
E.It is possible to change the host ID of a zone.

Correct Answer: A,B,D

A: The beadm utility includes support for creating and administering non-global zone boot environments.
Note: A boot environment is a bootable instance of the Oracle Solaris operating system image plus any other application software packages installed into that image. System administrators can maintain multiple boot environments on their systems, and each boot environment can have different software versions installed.
B: Role-based access control (RBAC) is a security feature for controlling user access to tasks that would normally be restricted to the root role. By applying security attributes to processes and to users, RBAC can divide up superuser capabilities among several administrators.

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Question 90

Review the information taken from your server:

Which option describes the command used to create these snapshots of the root file system?

A.Option A
B.Option B
C.Option C
D.Option D

Correct Answer: A

Explanation/Reference:
Explanation:
zfs snapshot [-r] [-o property=value] ... filesystem@snapname|volume@snapname Creates a snapshot with the given name. All previous modifications by successful system calls to the file system are part of the snapshot. See the "Snapshots" section for details.
-r
Recursively create snapshots of all descendent datasets. Snapshots are taken atomically, so that all recursive snapshots correspond to the same moment in time.

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