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Code d'Examen: 1z0-100
Nom d'Examen: Oracle (Oracle Linux 5 and 6 System Administration)
Questions et réponses: 108 Q&As
Code d'Examen: 1z0-590
Nom d'Examen: Oracle (Oracle VM 3 for x86 Essentials)
Questions et réponses: 82 Q&As
Code d'Examen: 1z0-474
Nom d'Examen: Oracle (Oracle Taleo Recruiting Cloud Service 2012 Essentials)
Questions et réponses: 76 Q&As
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NO.1 Examine this extract from the /etc/ssh/sshd_config file:
passwordAuthentication no
What is the effect of this parameter settings on the use of openSSH commands on both the client
and server?
A. Passwords are not required and no ssh-keygen is required either. Only passphrase are required.
B. Client users whose keys are not in the authorized_keys file on the server are unable to use
passwords to authenticate themselves to the server.
C. The ssh daemon does not ask for a password before starting or stopping the sshd service.
D. Client users whose keys are not in the authorized_keys file on the client are unable to use
passwords to authenticate themselves to the server.
Answer: B
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Explanation:
If you set PasswordAuthentication to no, you will no longer be able to use a login and password to
authenticate and must use a login and public key instead (if PubkeyAuthentication is set to yes).
NO.2 Which four statements are true about software on the Oracle Public YUM server?
A. It contains Oracle Linux installation ISO images.
B. It contains Oracle Linux binary RPM packages.
C. It contains Oracle Linux errata packages.
D. It contains Oracle Linux source RPM packages.
E. It contains beta Oracle Linux software packages.
F. It does not contain Unbreakable Enterprise Kernel packages.
Answer: B,C,D,F
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Explanation:
The Oracle public yum server offers a free and convenient way to install the latest Oracle Linux
packages as well as packages from the Oracle VM installation media via a yum client.
Oracle provides all errata and updates for Oracle Linux via the Public Yum service, which includes
updates to the base distribution, but does not include Oracle-specific software.
F: By default, all new installations of Oracle Linux 6 Update 5 are automatically configured to use the
public yum update service. If you subsequently register the system with ULN, the public yum service
is automatically disabled.
NO.3 Which three settings can be controlled by using the chage breemar command as the root user,
to modify the parameters in the /etc/shadow file?
A. The expiration date of the breemar account
B. The number of days after the breemar account is locked, that it becomes expired
C. The maximum number of days that must elapse between password changes by the user breemar
before the password becomes invalid
D. The number of days after the breemar account is locked, that it becomes unlocked
E. The minimum number of days that must elapse between password changes by the user breemar
F. The maximum number of failed login attempts on the breemar account before the account is
locked
Answer: A,C,E
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Explanation:
A: chage -E, --expiredate EXPIRE_DATE
Set the date or number of days since January 1, 1970 on which the
user's account will no longer be accessible.
CE: You need to use chage command to setup password aging.
The chage command changes the number of days between password changes
and the date of the last password change. This information is used by the system to determine
when a user must change his/her password.
NO.4 Which statements is true concerning Oracle Linux configuration files for users and groups?
A. The /etc/passwd file contains hashed passwords for each user.
B. The /etc/shadow file contains hashed passwords for each user.
C. The GECOS field in /etc/passwd file may be empty.
D. The /etc/group file contains the group name and the hashed group password.
Answer: B
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Explanation:
/etc/shadow file stores actual password in encrypted (one-way hashed) format for user's account
with additional properties related to user password i.e. it stores secure user account information
NO.5 Which two software packages are prerequisites for enabling the configuration and use of a
Network information Service (Nis) client?
A. nis-tools
B. slapi-nis
C. ypbind
D. nisserv
E. nisbind
F. yp-tools
Answer: C,E
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Explanation:
C: ypbind finds the server for NIS domains and maintains the NIS binding information. The client
(normaly the NIS routines in the standard C library) could get the information over RPC from ypbind
or read the binding files.
E: Setting up a NIS master server:
Required packages: yp-tools ypbind ypserv portmap
NO.6 This MDADM output:
Which two aspects can be determined from this output?
A. A device failed and has been removed from this RAID set.
B. It is no longer possible to write to this RAID set.
C. Read and write performance is no longer optimal on this RAID set.
D. This RAID set was built without a spare device.
E. Only Write performance is no longer optimal on this RAID set.
Answer: A,D
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NO.7 You want to display the value of a shell variable called service after assigning a value as
shown:
SERVICE =ACCT S
Which two settings will display the name of the variable and its value?
A. set | grep service
B. echo $SERVICE
C. env | grep SERVICE
D. env $SERVICE
E. set $SERVICE
Answer: B,C
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Explanation:
C: env - set the environment for command invocation
If no utility operand is specified, the resulting environment shall be written to the standard output,
with one name= value pair per line.
NO.8 What is the main advantage of the Oracle Unbreakable Enterprise Kernel compared with the
Red Hat compatible kernel?
A. It is more secure and, therefore, more difficult to hack.
B. It has a lower Mean Time Between Failures.
C. It provides higher availability for applications by reducing Mean Time to Recovery.
D. It scales better for more CPUS, memory, and Infiniband network connections.
Answer: D
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Explanation:
The Unbreakable Enterprise Kernel, for those who want to leverage the latest
features from
mainline Linux and boost performance and scalability.
The Red Hat Compatible Kernel, for those who prefer strict Red Hat kernel ABI (kABI)
compatibility.
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