A Short Teradata Quiz for You


Here is a short Teradata Quiz for you. I hope you like it.



Welcome to the Big Teradata Quiz.

Each time you take the quiz, a different set of questions will be asked. We are adding new questions on a regular base. At the end of the quiz, we will show you the correct answers, your score and the average score of all people.

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1. Which of the following statements about NOPI tables are wrong?
2. What option can best describe Teradata's architecture?
3. Wich table kind is using temp space?
4. Which compression methods are related to Teradata Columnar?
5. Which of these technical join types are available on Teradata?
6. Are presence bytes stored in each row or once per table (in the table header)?
7. Assume that in DBC.DBQLOGTBL the column WDDelayTime equals DelayTime. What can you conclude?
8. A huge table is accessed several hundreds of times per day. Which kind of compression would be the better choice?
9. Does the Nested Join always require an unique index on the left table?
10. Is table skew increasing the problem of duplicate row checks (SET tables)?

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Our Reader Score
[Total: 16    Average: 3.6/5]
A Short Teradata Quiz for You written by Roland Wenzlofsky on October 26, 2015 average rating 3.6/5 - 16 user ratings


  1. 1)Which of the following is not stored in a sub table?
    Answer Provided: Join Index (JI).Row Partitioned Table.
    Correct Answer: Row Partitioned Table.

    comment: I am aware only the Secondary indexes in Teradata creates sub-table, but for the above question, why the JI stored in sub table, does this question meant that JI allows creation of SI over the JI or does it meant Join Index (JI) stores its join results in perm space.

    2) Which of these technical join types are available on Teradata?
    Answer Provided: Left Outer Join.
    Correct Answer: Hash Join.Merge Join.Sliding Window Merge Join.Product Join.

    Comment : Hash Join, Merge Join, Sliding Window Merge Join and Product Join are the join strategies determined by the optimiser based on the joining tables data distribution, so I have answered Left outer join is the Join Type, a user can decide based on his business need.

    3) Are tables without Primary Index (NOPI) always distributed evenly across all AMPs?
    Answer Provided: Yes
    Correct Answer: No

    Comment: Could you explain me why the NOPI tables not always evenly distributed across all AMPs.

    Kindly advice me how to approach the above questions.



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