adplus-dvertising
frame-decoration

Question

When might a full refresh be a better option than an update for keeping a data warehouse up to date?

a.

When more than 25% of the source records change daily

b.

When less than 15% of the source records change daily

c.

When the number of records to be updated is high

d.

When the cost of updating per record is lower

Answer: (a).When more than 25% of the source records change daily Explanation:A full refresh may be a better option when more than 25% of the source records change daily.

Engage with the Community - Add Your Comment

Confused About the Answer? Ask for Details Here.

Know the Explanation? Add it Here.

Q. When might a full refresh be a better option than an update for keeping a data warehouse up to date?

Similar Questions

Discover Related MCQs

Q. What is the primary reason for converting production system keys to system-generated keys in the data warehouse?

Q. What is the key of the fact table in a data warehouse based on?

Q. What is the primary function of ETL (Extraction, Transformation, and Loading) in a data warehouse?

Q. Why is data extraction for a data warehouse an ongoing function carried out at very frequent intervals?

Q. What is the key difference between data loading in a data warehouse and data loading for a new operational system?

Q. What role do vendor tools play in the ETL process for data warehousing?

Q. What are the three main components of the ETL process?

Q. Why is data transformation in a data warehouse more complex than conversion functions for operational systems?

Q. When might a full refresh be used for data loading in a data warehouse?

Q. Why is ongoing data extraction required in a data warehouse?

Q. What is the primary role of data transformation in a data warehouse?

Q. What is the ETL process, and why is it critical for data warehousing?

Q. Which of the following ETL tool categories offers maximum flexibility for data transformations, full loads, and incremental loads?

Q. What is the primary source of data captured through replication in ETL tools?

Q. What is the primary role of code generators in ETL?

Q. Which ETL tool option is offered by several DBMS vendors at little or no extra cost, making it attractive to many organizations?

Q. What are some of the common features or capabilities provided by ETL tools?

Q. Which ETL tool category generates program code for data extraction and transformation and allows users to add custom code for special conditions?

Q. What do ETL tools primarily use to perform data capture through replication?

Q. Which ETL tool category deals with dynamic and sophisticated data manipulation algorithms?