Oracle

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QUESTION 1
Examine the following commands:

# groupadd project
# mkdir /usr/share/project
# chown -r root.project /usr/share/project
# qpasswd -a scott project
# qpasswd -a foo project
# chmod 2775 /usr/share/project

Based on the commands, which statement is correct?

A.    Any new file created in the /usr/share/project folder by user scott will not be possible for foo to modify it.
B.    All members of the project group need the administrator’s help to change the file permission every time users write new files in the /usr/share/project folder.
C.    Files created by all members of the project group in the /usr/share/project folder will get the same group permission as the folder itself.
D.    The chmod command can only take a tree-digit argument.

Answer: A
Explanation:
*A permission of “2755” for a directory means that everyone has read and execute permission, while the file owner and members of the file’s group additionally have write permission. And any files or subdirectories created in that directory will inherit the parent directory’s group id.
Incorrect:
Not D: chmod 2775 is a valid command.

QUESTION 2
View the exhibit.

21

Examine the grub.conf file snippet in the Exhibit. Which statement is true if your Linux system boots by using this grub.conf file?

A.    GRUB will boot, by default, the first kernel entry of this grub.conf file.
B.    GRUB will prompt you to select the kernel to be booted because the default parameter is set to 0.
C.    GRUB will boot the kernel specified in the inittab file of the system.
D.    GRUB will boot, by default, the second kernel entry of this grub.conf file.

Answer: A
Explanation:
According the grub .conf file you have got 8 seconds to choose whether to boot the first entry.Now if you want to change, and let say you want the second grub entry as booting system by default, justchange the line:default=0 bydefault=1

QUESTION 3
The DBA tells you that the system is not overloaded but you can tell that the system us actively swapping. What command would you run to show this information to the DBA?

A.    # iotop
B.    # iostat 5 10
C.    # cat /proc/meminfo
D.    # vmstat 5 10

Answer: B
Explanation:
*iostat – Report Central Processing Unit (CPU) statistics and input/output statistics for devices, partitions and network filesystems (NFS).
*The iostat command is used for monitoring system input/output device loading by observing the time the devices are active in relation to their average transfer rates. The iostat command generates reports that can be used to change system configuration to better balance the input/output load between physical disks.
Incorrect:
Not A: Related to kernel and processes.
*iotop – simple top-like I/O monitor
*iotop watches I/O usage information output by the Linux kernel (requires 2.6.20 or later) and displays a table of current I/O usage by processes or threads on the system.
*iotop displays columns for the I/O bandwidth read and written by each process/thread during the sampling period. It also displays the percentage of time the thread/process spent while swapping in and while waiting on I/O. For each process, its I/O priority (class/level) is shown. In addition, the total I/O bandwidth read and written during the sampling period is displayed at the top of the interface.
Not C: related to RAM usage.
*The entries in the /proc/meminfo can help explain what’s going on with your memory usage, if you know how to read it.
*High-Level Statistics
MemTotal: Total usable ram (i.e. physical ram minus a few reserved bits and the kernel binary code)
MemFree: Is sum of LowFree+HighFree (overall stat) MemShared: 0; is here for compat reasons but always zero. Buffers: Memory in buffer cache. mostly useless as metric nowadays Cached: Memory in the pagecache (diskcache) minus SwapCache SwapCache: Memory that once was swapped out, is swapped back in but still also is in the swapfile (if memory is needed it doesn’t need to be swapped out AGAIN because it is already in the swapfile. This saves I/O)
Not D:vmstat – Report virtual memory statistics

QUESTION 4
View the cron job example below. How often will this cron job run?

0 */ 5 * * * command

A.    every 5 minutes
B.    every 5 hours
C.    every 5 days
D.    every 5th month

Answer: B
Explanation:
Execute a cron job every 5 Hours
The second field is for hours. If you specify * in this field, it runs every hour. If you specify */5 in the 2nd field, it runs every 5 hours as shown below.
0 */5 * * * /home/ramesh/backup.sh

QUESTION 5
What happens when the following command is run?

# authconfig – – passalgo = md5 – – update

A.    It produces the MD5 checksum of the input data.
B.    It configures the MD5 checksum for newly authored documents
C.    It converts the stdio input to MD5 algorithm.
D.    It changes the user password hashing algorithm to MD5.

Answer: D

QUESTION 6
Identify the two kernels that are shipped with Oracle Linux 6.

A.    Unbreakable Enterprise Kernel
B.    Unbeatable Enterprise Kernel 11g
C.    Red Hat Compatible Kernel
D.    Linux Compatible Kernel
E.    Solaris 11 Container Kernel

Answer: AC
Explanation:
Oracle Linux 6 ships with two sets of kernel packages:
*Unbreakable Enterprise Kernel [kernel-uek-2.6.32-100.28.5.el6] Only available on the x86_64 (64 bit) platform
Installed and booted by default
*Red Hat compatible Kernel [kernel-2.6.32-71.el6] Installed by default

QUESTION 7
You have to find the default run level of your Oracle Linux system.
Which file will help you find this information?

A.    /boot/grub/grub.conf
B.    /etc/inittab
C.     /etc/rc.d/rc.sysinit
D.     /etc/rc.local
E.     /etc/rc.d/init.d

Answer: B
Explanation:
The default run level is specified in the /etc/inittab file.

QUESTION 8
On your Oracle Linux 6 system, you have to configure the eth0 network interface to 100 MB/sec, half duplex without trying to autonegotiate. Which command will help you configure this requirement?

A.    # ifconfig eth0 speed 100 autoneg off duplex half
B.    # ethtool interface eth0 speed 100 autoneg off duplex half
C.    # ifconfig interface eth0 speed 100 autoneg off duplex half
D.    # ethtool -seth0speed 100 autoneg off duplex half

Answer: D
Explanation:
When I have a device that is acting up, I tend to run: ethtool ethX, check the Supported link modes, the Link partner advertised link modes and the actual speed and Duplex. If my Supported link mode is set low (say 10/Half for some reason) but my switch supports 1000baseT/Full then I’ll use ethtool -s ethX to change my ethernet settings to 1000baseT/Full. Just about anything you see from: ethtool ethX, can be changed with ethtool -S ethX. In this case you would use the following:
ethtool -S eth0 speed 1000 duplex full autoneg on

QUESTION 9
As a system administrator, you run the system-config-network tool and make changes to the configuration. You change the hostname and the DNS search path settings. Which two files will these changes be written into?

A.    “/etc/sysconfig/network” and “/etc/resolv.conf” files
B.    “/etc/sysconfig/network” and “etc/nsswitch.conf/” files
C.    “/etc/sysconfig/netconfig” and “/etc/resolv.conf” files
D.    “etc/sysconfig/network-scripts/network” and “/etc/resolv.conf” files

Answer: C

QUESTION 10
Which two statements are correct about the Oracle ASMLib library?

A.    Oracle ASMLib is an optional support library for the Automatic Storage Management (ASM) feature.
B.    To use ASMLib library, you have to recompile it first for the Unbreakable Enterprise Kernel.
C.    Oracle Automatic Storage management (ASM) requires Oracle ASMLib library to function completely.
D.    Oracle ASMLib kernel driver is included in the Unbreakable Kernel.

Answer: AD
Explanation:
A (not C):ASMLib is an optional support library for the Automatic Storage Management feature of the Oracle Database.
ASMLib allows an Oracle Database using ASM more efficient and capable access to the disk groups it is using.
D (not B):The Oracle ASMLib kernel driver is now included in the Unbreakable Enterprise Kernel. No driver package needs to be installed when using this kernel.

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QUESTION 1
Which three statements are true regarding Flex ASM on a four-node cluster consisting of three-hub nodes and a leaf node?

A.    An ASM instance and database instances can coexist on the same hub node.
B.    A database instance on a hub node can be a client of an ASM instance running on any leaf node.
C.    A database instance on a hub node can be a client of an ASM instance running on any hub node.
D.    A database instance on a leaf node can be a client of an ASM instance running on any hub node.
E.    A database instance on a hub node uses an ASM instance as an I/O server when requesting I/O todiskgroups.
F.    ASM Cluster File System (ASFS) can only be deployed on hub nodes.

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QUESTION 211
RMAN is configured to create backupset backups for your database.
You issue the command to back up the database:

RMAN> BACKUP DATABASE PLUS ARCHIVELOG DELETE INPUT;

Which two statements are true about the backup performed by the command?

A.    Only the used blocks in the data files are backed up.
B.    It backs up all the data files and deletes obsolete backups after the backup is complete.
C.    It backs up only those archived log files that are not backed up at least once.
D.    It backs up all the archived log files and deletes the ones that were just backed up.
E.    It backs up all archived redo log files and online log files and deletes the archived log files after the backup is complete.

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QUESTION 201
Which three statements are true about unplugging a pluggable database (PDB)?

A.    A PDB must be in closed state before it can be unplugged.
B.    A PDB must have been opened at least once after creation.
C.    A PDB must be in MOUNT state before it can be unplugged.
D.    PDB data file are automatically removed from disk.
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QUESTION 191
Which three methods can be used to create a pluggable database (PDB) in an existing multitenant container database (CDB)?

A.    Use PDB$SEED for creating a PDB.
B.    Use the DBMS_PDB package to plug a non-CDB into an existing CDB.
C.    Clone the existing PDB.
D.    Use Enterprise Manager Database Express to create a PDB in an existing CDB.
E.    Use the DBMS_PDB package to plug a pre-Oracle 12c database into an existing CDB. Continue reading

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QUESTION 181
Examine the commands executed in CDB$ROOT of your multitenant container database (CDB) that has multiple pluggable databases (PDB): Continue reading

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QUESTION 315
What is pre-requisite to alter a role?

A.    You should be granted the DBA role.
B.    You should set the OS_ROLES parameter to true.
C.    You should be granted the role with the GRANT OPTION.
D.    You should have the ALTER ANY ROLE system privilege.

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QUESTION 273
SMD is a smallfile locally managed tablespace with manual segment space management.
The SH user receives the following error while inserting data into the sales table:
 
Which three actions can be taken to enable the user to insert data? (Choose three.)

A.    altering the data file associated with the SMD tablespace to grow automatically
B.    adding a data file to the SMD tablespace, provided the tablespace has not reached its maximum number of file
C.    changing segment space management for the SMD tablespace to automatic
D.    resizing the data file associated with the SMD tablespace to make it larger, provided all data files have not yet reached their maximum size
E.    increasing the space quota on the SMD tablespace for the SH user, provided the files have not yet reached their maximum size

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