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LFCA Questions and Answers

Question # 6

Which utility is used to create public and private key pairs for SSH authentication?

A.

adduser

B.

ssh-keyqen

C.

keyqen

D.

ssh

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Question # 7

Which of the following best describes the technical term “Elasticity”?

A.

The degree to which a system can adapt to dynamic computing demands

B.

The degree to which a business accommodates larger loads just by adding resources

C.

The degree to which a system consistently performs according to its specifications

D.

The ability to meet the business's needs through a variety of cloud offerings

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Question # 8

Which is a common best practice to automatically reduce disk usage associated with the storage of log files?

A.

Use the loqrotate utility to periodically rotate the loq files.

B.

Create a cron job that deletes all log files in the folder every day.

C.

Delete the Vvar/log" directory so the log files are prevented from being created.

D.

Manually empty the log files every day of the week.

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Question # 9

What software application architecture allows teams to iterate quickly and to develop software applications to scale rapidly?

A.

Serverless architecture

B.

Container architecture

C.

SOA architecture

D.

Micro-service architecture

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Question # 10

Which of these providers host repositories of container images?

A.

Docker Hub

B.

GitHub

C.

Container Index

D.

GitLab

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Question # 11

Which type of cloud computing combines on-premise infrastructure with a public cloud?

A.

Super cloud

B.

Combination cloud

C.

Hybrid cloud

D.

Mixed cloud

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Question # 12

Which measures can be taken to prevent unauthorized access to cloud instances and services?

A.

Use multi-factor authentication, implement firewall rules, and back up data off-site.

B.

Implement block-chain tokens, use encrypted protocols, and encrypt the data on storage systems.

C.

Replicate data to another datacenter, use multi-factor authentication, and encrypt data on storage systems.

D.

Implement firewall rules, authentication, authorization, and encrypted protocols.

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Question # 13

An IT associate has a web application running on multiple servers, configured to scale based on CPU usage. The current configuration has a minimum size of 1 and a maximum size of 5 servers, designed to launch and spread the instances across 3 Availability Zones (AZ). During a low utilization period, an entire AZ went down, and the application experienced downtime. What can the IT associate do to increase the availability of the application?

A.

Increase the minimum to 2

B.

Change to scale based on number of requests

C.

Decrease the AZs to 2

D.

Increase the maximum to 6

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Question # 14

Which of the following is a non-functional requirement?

A.

The system must allow the administrator to disable user accounts.

B.

The system must provide the user the option to enable multi-factor authentication.

C.

The system must allow the user to upload a profile image.

D.

The system must adhere to all security requirements and regulations.

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Question # 15

After installing the package ‘postfix’, what command would you run in order to ensure that Postfix is started on reboot?

A.

/etc/init.d/enable postfix

B.

enable postfix on

C.

postfix -onboot yes

D.

svstemctl enable postfix

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Question # 16

What is the Linux kernel?

A.

It is the core interface between a computer's hardware and its processes.

B.

It is another name for the operating system.

C.

It contains all the applications and software installed on the computer.

D.

It is the firmware for the computer's processor.

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Question # 17

What command is used to set or change permission attributes of files (such as read, write, execute)?

A.

chacl

B.

chmod

C.

chown

D.

setattr

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Question # 18

A team just developed a new feature on the company’s main web application. An IT associate wants to test this new feature by making it available for only 10% of the users. If everything works without any problems for a week, the associate will then make it available for all users. Which release type should be used to achieve this goal?

A.

Canary release

B.

Experimental release

C.

Alpha release

D.

Beta release

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