Teradata Teradata MCQ 2

Question 1

Which Teradata utility is used to load large volumes of data into an empty table with maximum performance?

Accepted Answer

FastLoad

Answer

FastLoad is optimized for bulk loading into empty tables by bypassing the transient journal for maximum throughput.

Question 2

What does the EXPLAIN plan in Teradata primarily show?

Accepted Answer

The execution strategy chosen by the optimizer

Answer

EXPLAIN displays the step-by-step execution plan that the Teradata Query Optimizer has chosen for a SQL statement.

Question 3

In Teradata, what is a 'fallback' table?

Accepted Answer

A table with a duplicate copy of each row on a different AMP

Answer

Fallback protection stores a duplicate of every row on a different AMP so data remains accessible if one AMP fails.

Question 4

Which SQL command in Teradata is used to remove all rows from a table without logging individual row deletions?

Accepted Answer

TRUNCATE TABLE

Answer

TRUNCATE TABLE removes all rows quickly without logging each deletion, making it faster than a full DELETE.

Question 5

What is the purpose of the Teradata 'COLLECT STATISTICS' command?

Accepted Answer

To gather demographic data about column values for the optimizer

Answer

COLLECT STATISTICS gathers demographic information about column data distributions so the optimizer can build more efficient query plans.

Teradata Practice Test