ETL Testing ETL Performance and Scalability Testing

Question 1

What is the primary goal of ETL performance testing?

Accepted Answer

Measuring whether the ETL pipeline can process required data volumes within the defined processing window

Answer

Verifying that data transformations are logically correct

Answer

Checking that all column names match the specification

Answer

Validating that source systems are online

Question 2

What is an 'ETL batch window'?

Accepted Answer

The scheduled time period during which the ETL process must complete all data processing

Answer

A GUI window in the ETL tool interface

Answer

A database buffer for batch inserts

Answer

A network port used by ETL communication

Question 3

Which metric is MOST commonly used to measure ETL throughput performance?

Accepted Answer

Rows processed per second (or records per minute)

Answer

Number of ETL developers on the team

Answer

Number of source tables connected

Answer

Disk IOPS during load

Question 4

In ETL scalability testing, what does 'volume testing' involve?

Accepted Answer

Running the ETL pipeline with significantly larger datasets than normal to identify degradation points and bottlenecks

Answer

Testing audio volume settings on ETL server hardware

Answer

Testing the number of concurrent ETL tool users

Answer

Validating storage volume labels in the data center

Question 5

What ETL performance issue occurs when a single processing node becomes a bottleneck, slowing the entire pipeline?

Accepted Answer

Data skew

Answer

Referential integrity violation

Answer

Schema drift

Answer

Null propagation

Question 6

Which tool is commonly used to profile SQL query performance within an ETL pipeline in a US enterprise environment?

Accepted Answer

Execution plan analysis in SQL Server Management Studio or similar RDBMS tools

Answer

Notepad++

Answer

Microsoft Word

Answer

FTP client