Build Cloud-Native apps with Apache Cassandra

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Erick Ramirez avatar image
Erick Ramirez asked ·

What are the answers to the Workshop Series week 2 homework validation quiz?

As promised, here are the answers to the homework quiz from week 2.

workshop-faq
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1 Answer

Erick Ramirez avatar image
Erick Ramirez answered ·

Q1 - In Notebooks "#4 Data Modelling" : What is the primary key of table user_credentials?

  • PRIMARY KEY ((EMAIL)) [correct]
  • PRIMARY KEY ((userid))
  • PRIMARY KEY ((userid),email)

Q2 - In Notebooks "#5 - Advanced Data Type" : What is the table used to talk about counters?

  • video_recommendations
  • video_ratings
  • video_playback_stats [correct]

Q3 - Cassandra counters are always 100% accurate?

  • false [correct]
  • true

Q4 - What command adds/removes columns to/from a table?

  • CREATE
  • ALTER [correct]
  • DROP
  • PUNCTURE

Q5 - Which is NOT a Cassandra column type?

  • LIST<>
  • SET<>
  • MAP<>
  • DICTIONARY<> [correct]

Please note

The validation quiz at the end of each workshop is for our benefit (the workshop hosts) so we have a gauge of how participants are going and whether you are learning key topics from the workshops.

And when the validation quiz is completed within 24 hours of a workshop, we use it as confirmation of attendance. But again, just as a way for us to track aggregate participation.

To be clear, the quizzes are NOT to penalise participants. Think of the quizzes as a way of thanking us for the 100+ hours we spend each week delivering a workshop. When you complete the quiz immediately, it's you acknowledging our efforts and showing your appreciation at the end of each workshop.

We are here to help each and everyone of you learn, develop and become successful with Apache Cassandra. Thank you for attending our workshops!

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