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Code d'Examen: 1z1-497
Nom d'Examen: Oracle (Oracle Database 12c Essentials)
Questions et réponses: 150 Q&As
Code d'Examen: 1z0-100
Nom d'Examen: Oracle (Oracle Linux 5 and 6 System Administration)
Questions et réponses: 108 Q&As
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NO.1 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.2 Examine these statements and their output taken right after successful install of Oracle Linux:
[root@FAROUT /] rpm -q firstboot
Firstboot -1.110.10-1.0.2.e16.x86_64
[root @FAROUT /] # chkconfig - - list firstboot
Firstboot 0:off 2:off 3:off 4:off 5:off 6;off
[root@FAROUT /] # /etc/sysconfig/firstboot
RUN_FIRSTBOOT=NO
What is the conclusion?
A. The option to run firstboot was deselected during Oracle Linux installation.
B. The system was installed with desktop graphical packages and rebooted and the firstboot utility
ran successful.
C. Firstboot never ran in any run level because the service is turned off for all run levels.
D. The system was installed without selecting desktop graphical packages, thereby disabling
firstboot from running.
Answer: A
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Explanation:
Firstboot is set to off for all levels.
Example:
The rm command below remove or delate the firstboot file in order to make sure the firstboot
program running when we restart or reboot the Fedora machine.
[root@fedora ~]# rm /etc/sysconfig/firstboot
rm: remove regular file `/etc/sysconfig/firstboot'? y
[root@fedora ~]#
Then check and make sure that firstboot program or firstboot service is run when your Fedora
startup/boot up.
Check firstboot services
[root@fedora ~]# chkconfig --list firstboot
firstboot 0:off 1:off 2:off 3:off 4:off 5:off 6:off
[root@fedora ~]#
NO.3 Examine the command on its output:
[root@FAROUT ~] # modprobe -v nfs
Insmod /lib/modules/ 2.6.39-100.0.12.e16uek.x86_64 /kernel/fs/nfs_common/nfs_acl.ko insmod
/lob/modules/ 2.6.39
100.0.12.e16uek.x86_64 /kernel/net/sunrpc/auth_gss/auth_rpcgss.ko
Insmod /lib/modules/ 2.6.39-100.0.12.e16uek.x86_64 /kernel/fs/fscache/fscache/ko
Insmod /lib/modules/ 2.6.39-100.0.12.e16uek.x86_64 /kernel/fs/locked.ko
Insmod /lib/modules/ 2.6.39-100.0.12.e16uek.x86_64 /kernel/fs/nfs/nfs.ko
Which two statements are true about the modprobe command?
A. It will load the nfs module if all the modules upon which it depends have been loaded.
B. It displays the dependency resolution for the nfs module and loads all the modules upon which
nfs depends before loading the nfs module.
C. It verifies that the nfs module and all other modules that depend on the nfs module are installed.
D. It displays the dependency resolution that would occur if the nfs module were to be loaded using
modprobe nfs.
E. It only loads the nfs module if all the modules upon which it depends have not been loaded yet.
Answer: A
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Reference: http://redhat.activeventure.com/ 8 /customizationguide/ch-kernel-modules.html (kernel
module utilities)
NO.4 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.5 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.6 Which two statements are true concerning the installation and configuration of the
bootloader by the Anaconda installer, which is then used to boot Oracle Linux?
A. The Linux Loader (LILO) bootloader may be chosen for installation.
B. The bootloader must be password protected and Anaconda prompts for a password in all cases.
C. The Grand Unified Bootloader (GRUB) is the only bootloader used by Oracle Linux.
D. If previously installed operating systems are found on disk partitions that were not overwritten,
then an attempt is made to configure the bootloader to be able to boot them.
E. The bootloader is installed by default in the first partition of the disk.
Answer: A,E
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Explanation:
A (not C): Linux boot process from hard drive:
1.PC initializion phase - BIOS, POST.
2.PC starts boot loader - usually grub or lilo.
3.The bootloader locates kernel image on the hard drive.
4.The kernel decompresses and loads itself. Once finished it tries to mount the root filesystem. 5.
When the root filesystem is mounted, /sbin/init is executed and continues booting the system using
inittab and /etc/rc*.d scripts
NO.7 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.
NO.8 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
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