You want to configure networking on a host and have these requirements:
1.
A cache only nameserver is to be used.
2.
DHCP is used to obtain an IP address.
3.
DHCP must not overwrite nameserver details contained in the /etc/resolv.conf file.
4.
The nameserver must be activated automatically at system startup.
5.
There are two network adaptors, eth0 and eth1.
The bind package has already been installed and the network service stopped. Which four actions must be performed to implement this requirement?
A. Add lines with PEERDNS=no and BOOTPROTO=dhcp to the /etc/sysconfig/network- scripts/ifcfg-eth0 file.
B. Add a line with PEERDNS=no to the /etc/resolv.conf file.
C. Add a line with nameserver 127.0.0.1 to the /etc/resolv.conf file.
D. The network and bind services must be started automatically by using chkconfig for those services at the appropriate run levels.
E. Add lines with PEERDNS=no and BOOTPROTO=dhcp to the /etc/sysconfig/network- scripts/ifcfg-eth1 file.
F. Start the network service only automatically by using chkconfig for those services at the appropriate run levels.
G. Start the bind service only automatically by using chkconfig for those services at the appropriate run levels.
Examine the UserDir directives in this extract from /etc/httpd/conf/httpd.conf:
Ifmodule mod_userdir.c>
UserDir enabled user1
UserDir disabled user1
UserDir public_html
The web server URL is http://host01.
A website exists in the user's directory /home/user1/public_html.
A user attempts to access user1's webpages by using the URL: http://host01/~user1
Which statement describes the outcome?
A. The occurrence of user1 in the list of disabled users causes an access denied error to the website contained in user1's public_html subdirectory, overridding the enabled directive.
B. The occurrence of user1 in the list of enabled users allows access to the website contained in user1's public_html subdirectory, overridding the disabled directive.
C. The configuration produces an error upon web server startup, because the enabled and disabled directives conflict.
D. Access is granted because the UserDir public_html directive applies default access to all local users on the system, overriding the enabled or disabled directive.
Which two statements are correct about features and capabilities of virtualization in Oracle Linux?
A. Virtualization is restricted to running a guest operating system in a virtual machine.
B. Virtualization permits the creation of virtual environments by using Linux Containers or Kernel Virtual Machine (KVM).
C. An I/O path from a host server to a peripheral device can be virtualized, enabling multiple guest VMs to share an I/O device.
D. A type-1 hypervisor, also known as a host-based hypervisor, is designed to run within a traditional operating system.
E. A type-2 hypervisor communicates directly with the computer hardware and as known as a bare-metal hypervisor.
Consider the device-mapper-multipath package and configuration. Which statement is true?
A. /etc/multipath.conf is created by the package installation process.
B. /etc/multipath.conf must be created after installation by an administrator by copying from /usr/share/ doc/device-mapper-multipath-
C. mpathconf can modify the operating behavior of multipathing and persistent changes to the configuration file.
D. The multipath command can modify the multipath service run-level configuration and persistent changes to the configuration file.
Which three statements are true about Btrfs copy --reflink?
A. It works only on the same btrfs file system.
B. It works only on the same subvolumes.
C. It creates a new link pointing to an existing inode.
D. It creates a new inode that shares the same disk blocks as the original.
E. It creates a clone file and disk blocks are duplicated.
Examine the dtrace command:
dtrace n syscall::read:entry
Which two statements are true?
A. This statement fails with a syntax error because no action is defined.
B. This statement runs successfully with the default action being executed.
C. The probe name is read.
D. The probe name is entry.
E. The probe name is not specified in this command, but it is implied through adjacent colons.
F. This command runs but produces no output; is no predicate to select when the probe fires.
Examine the output of the lscgroup command:
cpuset, cpu, memory:/ cpuset, cpu, memory:/A2 cpuset, cpu, memory:/A2/A3 cpuset, cpu, memory:/B1 cpuset, cpu, memory:/A1 blkio:/ blkio:/B1 cpuacct:/
Which statement changes the shares parameter of the cpu subsystem for the group A3 to a value of 2?
A. cgset -r cpu.shares=2 A3
B. cgset -r cpu.shares=2 A3/A3
C. cgset -r shares=2 cpu:/A2/A3
D. cgset -r cpu.shares=2 cpuset, cpu, memory:/A2/A3
Examine the D script: syscall::write:entry { @[execname] = avg(arg2); }
Note that the third argument to the write(2) system call is the size of the write being made. Which statement is true about this D script?
A. It displays the average write size that each unique process makes.
B. It displays the average write size that each running program makes.
C. It does not run because the aggregate is not named.
D. It runs but produces no output.
Which two statements are true about debugging OCFS2?
A. The o2image command copies OCFS2 file system data from the device to the specified image file.
B. The o2image command copies OCFS2 file system metadata from the device to the specified image file.
C. You must mount the debugfs file system to enable the use of the debugfs.ocfs2 command.
D. Trace bits has two possible statuses: allow and deny.
E. You must unmount all ocfs2 file systems to enable the use of the debugfs.ocfs2 command.
Consider the features and capabilities of Kernel-based Virtual Machine (kvm). Which two statements are correct?
A. kvm is considered both a type-1 and type-2 hypervisor because it turns the Linux kernel into a bare-metal hypervisor but the OS running on the virtualization host is a full OS.
B. kvm is an open source hypervisor, which provides full virtualization with hardware-assisted virtualization. It does not support paravirtualized devices.
C. There are two kvm modules: a kvm module that provides the core virtualization infrastructure and a kvm_hw module that ensbles x86 hardware virtualization extensions (Intel VT or AMD- V).
D. The kvm hypervisor in Oracle Linux is managed with libvirt API and tools built for libvirt, such as virtmanager and virsh.
E. kvm provides a software package called Linux Integration Services (LIS) that provides integration between the OS running in the kvm virtual machine and the physical host.
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