QUESTION: 133

A server technician is installing a new server OS on legacy server hardware.
Which of the following should the technician do FIRST to ensure the OS will work as intended?

Consult the HCL to ensure everything is supported.
Migrate the physical server to a virtual server.
Low-level format the hard drives to ensure there is no old data remaining.
Make sure the case and the fans are free from dust to ensure proper cooling.

Answer(s): A

Explanation:

The first thing that the technician should do before installing a new server OS on legacy server hardware is to consult the HCL (Hardware Compatibility List) to ensure everything is supported. The HCL is a list of hardware devices and components that are tested and certified to work with a specific OS or software product. The HCL helps to avoid compatibility issues and performance problems that may arise from using unsupported or incompatible hardware. Migrating the physical server to a virtual server may be a good option to improve scalability and flexibility, but it requires additional hardware and software resources and may not be feasible for legacy server hardware. Low-level formatting the hard drives may be a good practice to erase any old data and prepare the drives for a new OS installation, but it does not guarantee that the hardware will work with the new OS. Making sure the case and the fans are free from dust may be a good practice to ensure proper cooling and prevent overheating, but it does not guarantee that the hardware will work with the new OS.

Reference:

https://www.howtogeek.com/190014/virtualization-basics-understanding-techniques- and-fundamentals/ https://www.howtogeek.com/173353/how-to-low-level-format-or-write-zeros- to-a-hard-drive/ https://www.howtogeek.com/303282/how-to-manage-your-pcs-fans-for-optimal- airflow-and-cooling/

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QUESTION: 134

Which of me following BEST describes a disaster recovery site with a target storage array that receives replication traffic and servers that are only powered on In the event of a disaster?

Cloud
Cold
Hot
Warm

Answer(s): D

Explanation:

A warm site is a type of disaster recovery site that has a target storage array that receives replication traffic and servers that are only powered on in the event of a disaster. A warm site is a compromise between a hot site and a cold site. A warm site has some equipment and data ready, but requires some configuration and restoration before resuming operations. A warm site is usually located in a different geographic area than the primary site and has redundant power, cooling, network, and security systems. A warm site is suitable for organizations that can tolerate some downtime and data loss in case of a disaster. A cloud site is a type of disaster recovery site that uses cloud-based resources and platforms to store backups and restore data and applications after a disaster. A cold site is a type of disaster recovery site that has only basic infrastructure and space available, but requires significant setup and installation before resuming operations. A hot site is a type of disaster recovery site that has all the equipment and data ready to resume operations as soon as possible after a disaster.

Reference:

https://www.techopedia.com/definition/11172/hot-site https://www.techopedia.com/definition/11173/warm-site https://www.techopedia.com/definition/11174/cold-site https://www.techopedia.com/definition/29836/cloud-recovery

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QUESTION: 135

A server administrator is deploying a new server that has two hard drives on which to install the OS.
Which of the following RAID configurations should be used to provide redundancy for the OS?

RAID 0
RAID 1
RAID 5
RAID 6

Answer(s): B

Explanation:

RAID 1 (mirroring) is a RAID configuration that should be used to provide redundancy for the OS on a server that has two hard drives on which to install the OS. RAID 1 (mirroring) is a configuration that duplicates data across two or more drives. It provides fault tolerance and improves read performance, but reduces storage capacity by half. If one drive fails in RAID 1, the other drive can continue to operate without data loss or system downtime. RAID 0 (striping) is a configuration that splits data across two or more drives without parity or redundancy. It improves performance but offers no fault tolerance. If one drive fails in RAID 0, all data is lost and the system cannot boot. RAID 5 (striping with parity) is a configuration that stripes data across three or more drives with parity information. It provides fault tolerance and improves performance, but reduces storage capacity by one drive's worth of space. RAID 5 can tolerate one drive failure without data loss, but not two or more. RAID 6 (striping with double parity) is a configuration that stripes data across four or more drives with double parity information. It provides fault tolerance and improves performance, but reduces storage capacity by two drives' worth of space. RAID 6 can tolerate two drive failures without data loss, but not three or more.

Reference:

https://www.howtogeek.com/199068/how-to- upgrade-your-existing-hard-drive-in-under-an-hour/

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QUESTION: 136

Which of me following should be placed at the top of a Bash script to ensure it can be executed?

bash
!execute
#!
@eacho off

Answer(s): C

Explanation:

#! is the symbol that should be placed at the top of a Bash script to ensure it can be executed. #! is also known as shebang or hashbang. It is a special notation that tells the operating system which interpreter to use to run the script. The shebang is followed by the path to the interpreter, such as /bin/bash for Bash, /bin/python for Python, or /bin/perl for Perl. For example, a Bash script that prints "Hello World" would start with:
#!/bin/bash echo "Hello World"
The shebang must be the first line of the script and must not have any spaces between the # and ! symbols. bash is not a valid shebang by itself, as it does not specify the path to the interpreter. !execute is not a valid shebang at all, as it does not start with #. @echo off is a command that disables the echoing of commands in a batch file on Windows, but it has nothing to do with Bash scripts on Linux.

Reference:

https://www.howtogeek.com/67469/the-beginners-guide-to-shell- scripting-the-basics/ https://www.howtogeek.com/435903/what-is-a-shebang-line/

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