A Technical I.T./DevOps Blog
DevOps ETL Quiz Answers
1. What is the devops tool for databases?
a. QuerySurge
b. Beehive
c. Stratos
d. DBMaestro
Answer: D. DBMaestro
2. What does mung mean?
Answer: “Mash until no good.” It refers to a permanent operation of data wherein changes will make the data irretrievable. An example would be to remove the commas from a .csv file.
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1. What is an iterator in Python?
A) A stream of data that is manipulated or interacted with as an object.
B) A function that returns a namespace.
C) A module of nested objects.
D) A function that returns packages.
Answer: A. For more information, see the Python.org glossary.
2. Which module in Python allows you to translate strings to and from binary formats?
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Big Data Quiz
1. What does EDH stand for?
a. Enterprise Data Hub
b. Extract Develop Hadoop
c. Extract Decide Haul
d. Extract Data Hadoop
Answer: a. Sources:
http://searchbusinessanalytics.techtarget.com/feature/Hadoop-2-YARN-set-to-shake-up-data-management-and-analytics (Previous link used to work.)
https://vision.cloudera.com/practical-uses-of-an-edh/
2. Gartner, Informatica and MapR think “data lakes” should be referred to as what?
a. data warehouses
b. data dams
c.
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Problem scenario
You have a Weebly website. You want a partial back-end back up of your website. What should you do?
Solution
1. Go to your Weebly Editor.
2. At the top, go to “Settings”
3. Scroll down to “Archive”
4. Enter your email address and click “Email Archive”
5. The email with have a link to download a portion of the website.
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Continue reading “How Do You Take a Partial Back Up of Your Weebly Website?”
This is a list of books focusing on message queuing solutions other than RabbitMQ. For RabbitMQ, see this link.
AMQP PREDICTIVE ANALYTICS REPORT by Gerard Blokdijk
ActiveMQ in Action by Bruce Snyder, Dejan Bosanac and Rob Davies
Code Connected Volume 1: Learning ZeroMQ by Pieter Hintjens
Programming WebSphere MQ with JAVA by Kunal Jaggi
ZeroMQ: Messaging for Many Applications by Faruk Akgul
ZeroMQ: Messaging for Many Applications by Pieter Hintjens
Updated 8/1/21
Problem scenario
An Ansible playbook appears to run with no errors or explicit failures. But the playbook is not working as you expect. There is no message indicating what could be wrong. What should you do to troubleshoot it so the intended effect(s) will happen?
Tips and Possible Solutions in Nearly Random Order
1. When you run the ansible-playbook command,
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Problem scenario
You prefer Python to Ruby for certain tasks, and you want to have a way of testing your configuration management tools. You want to use Testinfra to accomplish this (https://testinfra.readthedocs.io/en/latest/). You want to install Testinfra to test it out. What do you do?
Solution
Prerequisites
i. You must have pip3 installed on the server.
For Ubuntu/Debian systems,
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Continue reading “How Do You Use Testinfra (the Python module)?”
Problem scenario
You have seen Python functions defined using the self keyword. You want to test it out. How do you do this?
Solution
First of all, self is NOT a keyword in Python. Yes, you should probably use the word “self” when it is invoked. This is a well-accepted convention. It may be an unwritten rule. But you do not need to use the word “self”.
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Problem scenario
You have some .eml files (e.g., emails from a web-based email account) that you want to view. How do you display them for free?
Solution
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Problem scenario
You have a web server running Nginx that acts as a reverse proxy server. On occasion your regular web (Nginx) servers go down. You want to have one or two web (Nginx) servers that are reserved as backups exclusively. You do not want traffic going to these servers unless the main Nginx servers are unavailable (either due to network or server failure). You can allocate RAM and CPU to these reserved servers on demand.
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