Correct Answers :

[B, D]

Explanation :

There are two different types of processes that each request a different management approach. These are shell jobs and daemons. A cron job and a thread are subdivisions of these generic categories.

Correct Answers :

[B]

Explanation :

The Ctrl+Z command temporarily freezes a current job, after which the bg command can be used to resume that job in the background.

Correct Answers :

[A]

Explanation :

The Ctrl+C command cancels the current job. Ctrl+D sends the EOF character to the current job, which can result in a stop if this allows the job to complete properly. The difference with Ctrl+C is that when using Ctrl+C the job is canceled with no regard to what it was doing. The Ctrl+Z keystroke freezes the job.

Correct Answers :

[A, B]

Explanation :

Individual threads cannot be managed by an administrator. Using threads makes working in a multi-CPU environment more efficient because one process cannot be running on multiple CPUs simultaneously, unless the process is using threads.

Correct Answers :

[A]

Explanation :

The ps ef command shows all processes, including the exact command that was used to start them.

Correct Answers :

[B]

Explanation :

KVM virtual machines run directly on top of the KVM hypervisor module and are not depended on the availability of the management program.

Correct Answers :

[B]

Explanation :

The libvirtd process provides the management interface to access KVM virtual machines.

Correct Answers :

[A]

Explanation :

Hardware virtualization support needs to be present in your computer hardware. If it is not you cannot use KVM virtualization. On some computers, the feature is available, but not switched on by default. Switch it on through your computer BIOS setup.

Correct Answers :

[C, D]

Explanation :

Look for the vmx flag in /proc/cpuinfo to verify the availability of hardware virtualization support or for the svm flag (for AMD cpus). The lscpu command shows the hypervisor mode a host is offering, and if used on a virtual machine it shows which type of virtualization platform this machine is used on.

Correct Answers :

[A]

Explanation :

The modprobe kvm command loads the KVM kernel module and all its dependencies. Do not use insmod kvm ; that command will not load the kernel module dependencies as well.

Correct Answers :

[C]

Explanation :

The --scripts option checks whether there are scripts in an RPM package. If you want to query the package file and not the database of installed RPMs, you need to add the -p option to the -q option, which is used to perform RPM queries.

Correct Answers :

[C]

Explanation :

Use the rpm -qf command to find which RPM package a specific file comes from.

Correct Answers :

[A]

Explanation :

The yum install command installs individually downloaded RPM files while looking for package dependencies in the current repositories. This is better than using rpm -ivh , which does not consider the yum repositories. In earlier versions of RHEL, the yum localinstall command was used to install packages that were downloaded to the local file system, but this command is now deprecated.

Correct Answers :

[D]

Explanation :

The yum history command reads the /var/log/yum.log file and shows recent yum history. In this list, every event is marked with a history number that can be used with the yum history undo command.

Correct Answers :

[C]

Explanation :

The yum list all command shows installed packages and packages that are available in the repositories. The question was how to show installed packages (not all packages), which is why answer C is the correct answer.

Correct Answers :

[B]

Explanation :

The systemctl command on RHEL 7 is used to manage services. If used with the status option, the current state of the service is checked, and recent log messages about the service are displayed as well.

Correct Answers :

[C]

Explanation :

The fields in cron timing are minute, hour, day of month, month, and day of week. Answer C matches this pattern to run the task on the seventh day of the week at 11 a.m.

Correct Answers :

[A]

Explanation :

To launch a job from Monday through Friday, you should use 1-5 in the last part of the time indicator. The minute indicator */5 will launch the job every 5 minutes.

Correct Answers :

[A, D]

Explanation :

You cannot modify user cron files directly, but have to go through the crontab editor. This editor is started with the crontab -e command.

Correct Answers :

[B]

Explanation :

The /etc/cron.d directory is used to store cron files for individual services that need tasks to be executed through cron. This directory is mostly filled by installing RPM files that contain cron jobs.