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. If you cancel an ALTER TABLE statement, will there be a rollback?
2. Before selecting the Primary Index, what do you need to know so that even distribution is ensured?
3. What is the value of the first presence bit of the first presence byte?
4. You execution plan shows high confidence for a retrieve step. What does this mean?
5. Which of the following join types are related to PPI tables?
6. Which of the following is not a TASM request target?
7. Which of the following are conditions for changing Partition definitions using an ALTER TABLE statement?
8. Would you consider to use block level compression (BLC) in order to reduce CPU usage?
9. Of the following, which are true statements about permanent space?
10. Which of the following load method is not considered bulk loading?

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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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