Teradata For Beginner 3

Question 1

Which Teradata utility is used to load large volumes of data into an empty table at high speed?

Accepted Answer

FastLoad

Answer

FastLoad is designed for bulk loading data into empty tables very quickly by bypassing the transient journal.

Question 2

What is the role of the Parsing Engine (PE) in Teradata?

Accepted Answer

It parses SQL, optimizes queries, and dispatches work to AMPs

Answer

The Parsing Engine receives SQL statements, parses them, creates an execution plan via the optimizer, and coordinates AMP activity.

Question 3

In Teradata, what is a Volatile table?

Accepted Answer

A temporary table that exists only for the duration of the session

Answer

Volatile tables are session-scoped temporary tables that are automatically dropped when the session ends.

Question 4

Which clause in Teradata SQL is used to filter groups after a GROUP BY operation?

Accepted Answer

HAVING

Answer

The HAVING clause filters aggregated results after GROUP BY, while WHERE filters rows before aggregation.

Question 5

What does the EXPLAIN statement do in Teradata?

Accepted Answer

Displays the query execution plan without running the query

Answer

EXPLAIN returns the optimizer's execution plan in plain text, allowing you to understand how a query will be processed before running it.

Teradata Practice Test