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Q41. Which three statements correctly describes the purpose of and administration of kernel boot parameters in Oracle Linux?
A. Kernel boot parameters may be specified in /boot/grub/grub/conf.
B. Kernel boot parameters used to boot the running system may be examined after boot by Viewing /boot/grub/grub/conf.
C. Kernel boot parameters used to boot the running system may be examined after boot by viewing /proc/cmdline.
D. Additional kernel boot parameters may be specified in an administrator-specified parameter file that is read by grub stage.
E. Additional kernel boot parameters may be specified from the grub command line.
F. Additional kernel boot parameters may be specified in an administrator-specified parameters that is read by GRUB stage1_5.
Q42. Which three are valid directories for cron jobs to be run at known intervals?
Explanation: An alternative to editing the crontab is to place executable scripts into one of the following directories. The script will be run at the appropriate interval.
This is actually using anacron, rather than cron, but it achieves a similar goal.
Q43. A web server on HOST01 is listening on port 80.
Examine the IPTABLES rule shown: [root@host01 ~] # iptables –L INPUT Chain INPUT (policy ACCEPT) targetportoptsourcedestination
ACCEPTtcp- - anywhereanywheretcp dpt:http Another rule is then added: [root@host01 ~] # iptables –A INPUT –P tcp - - dport 80 –j REJECT What is the effect of this command on subsequent attempts to access the web server on
HOST01 using port 80?
A. New connection attempts timeout.
B. New connection attempts are refused and the client informed of the refusal.
C. New connection attempts always succeed.
D. New connection attempts succeed until a reload of the firewall rules.
Q44. Which three statements are true concerning filesystems supported by Oracle Linux?
A. An ext3 filesystem can be mounted as an ext2 filesystem.
B. An ext4 filesystem can be mounted as an ext3 filesystem.
C. The ext3 and ext4 filesystems both support multiple journaling modes.
D. The btrfs filesystem includes a volume manager.
E. The btrfs filesystem cannot be used for the root filesystem.
F. The ext4 filesystem is a copy-on-write filesystem.
Explanation: A: ext2 file systems are upgradeable to ext3 without reformatting.
C: The ext3 file system includes journaling capabilities to improve reliability and availability. In addition to the features of ext3, the ext4 file system supports extents (contiguous physical blocks), pre-allocation, delayed allocation, faster file system checking, more robust journaling, and other enhancements.
Q45. Which three statements are true about administering user accounts and groups for an Oracle Linux server in preparation for installing the Oracle Database server?
A. The Oracle software owner must be a Linux user called oracle.
B. The Oracle software owner must not be the root user.
C. The owner of the Oracle httpd daemon process must be the Linux user called nobody.
D. A Linux user who is a member of the OSDBA group may start an Oracle database instance.
E. The /etc/sudoers file must specify that the Oracle software owner be allowed to run commands as root.
F. The OINSTALL group owns the Oracle Inventory.
Q46. 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.
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
Q47. Which two statements are true concerning a GUID Partition Table (GPT)?
A. It supports named disk partitions.
B. It supports primary and extended partitions.
C. It supports disks greater than two terabytes.
D. It cannot be used on the system disk.
E. It supports only up to 16 partitions.
not B, not E: On GUID Partition Table (GPT) hard disks, you can configure up to 128
partitions and there is no concept of extended or logical partitions.
Not D: You cannot boot from a GPT disk.
Q48. Which four statements are true about the proc and sysfs filesystem?
A. The sysfs filesystem contains information about processes.
B. The proc filesystem contains information about CPUs.
C. The proc filesystem contains information about memory.
D. The sysfs filesystem contains information about CPUs.
E. The sysfs filesystem contains information about memory.
F. The proc filesystem contains information about the installer parameters.
Explanation: * sysfs is the Virtual Filesystem created during the 2.6 Kernel release cycle to show device information as procfs did not do this type of information that well.
Memory etc has not been ported to sysfs as it was never intended to show that type of information so it is unlikely it will be ported at all.
* sysfs is a virtual file system provided by Linux. Sysfs exports information about devices and drivers from the kernel device model to user space, and is also used for configuration.
Q49. Which three actions may be performed using the date command in Oracle Linux?
A. Setting the hardware clock from the current system time
B. Setting the system time from the hardware clock
C. Displaying the current time in an administrator-specified format
D. Displaying the time and date in the future
E. Displaying the time and date in the past
F. Synchronizing the system time from an ntp server
Q50. Which three compression programs can tar use to natively filter an archive?