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A Short Teradata Quiz for You

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

 

 

Welcome to the 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.

Enter your name and press "NEXT" to start the quiz

Name Email
1.

Which of these technical join types are available on Teradata?

1 out of 10
2.

Why would you use a Unique Primary Index (UPI)?

2 out of 10
3.

Which of the following is not a TASM request source?

3 out of 10
4.

Assume that in DBC.DBQLOGTBL the column WDDelayTime equals DelayTime. What can you conclude?

4 out of 10
5.

Given a NUSI on columns {A,B} and the following SQL statement: SELECT * FROM WHERE A=1 AND B=1. Can the Optimizer use the NUSI (given strong selectivity)?

5 out of 10
6.

What option can best describe Teradata's architecture?

6 out of 10
7.

Which action by the system is enabled by the use of the following SQL option? Locking row no wait

7 out of 10
8.

When you create a primary index, which of the following options should be taken into consideration?

8 out of 10
9.

Can you recover the password of a user in Teradata?

9 out of 10
10.

Which if the following requests honor freespace percent?

10 out of 10

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Roland Wenzlofsky
 

Roland Wenzlofsky is a graduated computer scientist and Data Warehouse professional working with the Teradata database system for more than 15 years. He is experienced in the fields of banking and telecommunication with a strong focus on performance optimization.

  • Avatar sathya says:

    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.

    Thanks,

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