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Free TDBL1-16.00 Exam Braindumps (page: 7)

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PDF with 100 Questions

Which index would be likelyto provide quick data access fortwo tables that are often queried together on data for just the current year?

  1. A Multi-join Nonunique Secondary Index (NUSI)
  2. A Single Table Join Index
  3. A Sparse Join Index
  4. A Sparse Unique Primary Index (UPI)

Answer(s): A

Explanation:

A Multi-join Nonunique Secondary Index (NUSI) would be the best option for quick data access for two tables that are often queried together on data for just the current year. Multi-join NUSI is useful when there is no single primary index that can be defined on the table to support the queries. It allows quick access to data on two or more tables based on the columns that are included in the index. By using this index, the data access time can be improved, and queries can be run more efficiently.



Which component is involved at the point of entry of data into a data warehouse?

  1. Query log
  2. Load utilities
  3. Data profiling
  4. System monitoring

Answer(s): B

Explanation:

The load utilities component is involved at the point of entry of data into a data warehouse. Load utilities provide a way to load large amounts of data into a Teradata database quickly. It can handle various data formats, such as delimited, fixed-length, and XML. The load utilities also support parallelism, which allows data to be loaded into multiple tables concurrently, improving the overall load performance.



What is the role of the Primary Key?

  1. Provides alternate access path
  2. Uniquely identifies every row on the table
  3. Most direct access path
  4. Evenly distributes rows in the table

Answer(s): B

Explanation:

The primary key is used to uniquely identify every row on the table. It ensures that each row in the table has a unique identifier and provides a way to enforce data integrity. A primary key is created by specifying one or more columns that will uniquely identify each row in the table. The primary key is used as the most direct access path to the data in the table, making it an essential component of a well-designed database.



What does the staging layer accomplish?

  1. It contains data that has been transformed.
  2. It provides user or application-specific data structures.
  3. It simplifies strategic data distribution.
  4. It maintains data in its raw and unprocessed format.

Answer(s): D

Explanation:

The staging layer is used to maintain data in its raw and unprocessed format. It is the first layer in the data warehouse architecture and is used to store data that is being prepared for loading into the data warehouse. The staging layer is used to capture data from various sources and maintain it in its original format. The data in the staging layer is not transformed, and it is not optimized for querying.






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