Data Processing Computer-Based Test On Data-Processing 2

Question 1

Which data structure stores elements in a last-in, first-out (LIFO) order?

Accepted Answer

Stack

Answer

A stack follows LIFO order, where the most recently added element is removed first.

Question 2

In a relational database, a foreign key is used to:

Accepted Answer

Enforce a link between two tables

Answer

A foreign key creates a referential link between a column in one table and the primary key of another table.

Question 3

Which of the following best describes 'batch processing'?

Accepted Answer

Collecting data over a period and processing it all at once

Answer

Batch processing accumulates data over a set interval and processes it as a group rather than immediately.

Question 4

What does ETL stand for in data processing workflows?

Accepted Answer

Extract, Transform, Load

Answer

ETL is a three-phase pipeline: extracting data from sources, transforming it into a usable format, and loading it into a destination.

Question 5

A checksum is primarily used in data processing to:

Accepted Answer

Detect errors in transmitted or stored data

Answer

A checksum is a computed value appended to data so the receiver can verify integrity by recomputing it.

Data Processing Practice Test