A business needs to decide whether to collect data through a customer survey or use existing purchase records. Which factor is most important when selecting the data collection method?

The popularity of the method in the industry

The research question and analytical goals

A company wants to understand why customer churn has increased over the last quarter. They need detailed insights into customer behavior and preferences. Which data collection method is most appropriate for this analytical goal?

Relying on external industry reports

Collecting primary data through customer interviews and surveys

Using only internal sales data from the last quarter

Analyzing social media posts from all users

A financial firm must store transaction records for regulatory compliance. The data is highly structured, requires strong consistency and ACID transactions, and must be queried with complex joins for reporting. The volume is moderate but expected to grow steadily. Which storage solution is most appropriate?

Relational database (e.g., PostgreSQL)

NoSQL document database (e.g., MongoDB)

Python InstitutePCAD - Certified Associate in Data Analytics with Python

Domain 1Objective 1

Data Collection, Integration, and Storage PCAD-31 Practice Questions (Page 2)

Part of the Data Acquisition and Pre-Processing domain, which accounts for 29.2% of the PCAD-31 exam. Python Institute does not publish an official question count, but from its 60-minute exam (~25–40 total, ~7–7 in this domain), expect 2–2 from this objective — we provide 25 practice questions to prepare you well beyond it. (estimate)

25questions here

5free pages

6concepts

29.2%of the exam

Questions 6–10

6foundation · easy
A company needs to store highly structured transactional data with strict consistency requirements, such as financial records. Which storage solution is most appropriate?
Select an answer first
7foundation · easy
A business needs to decide whether to collect data through a customer survey or use existing purchase records. Which factor is most important when selecting the data collection method?
Select an answer first
8foundation · easy
A company wants to understand why customer churn has increased over the last quarter. They need detailed insights into customer behavior and preferences. Which data collection method is most appropriate for this analytical goal?
Select an answer first
9foundation · easy
A startup needs a storage solution that can easily scale to handle unpredictable growth in user-generated content, with flexible data structures. Which storage solution is most appropriate?
Select an answer first
10application · medium
A financial firm must store transaction records for regulatory compliance. The data is highly structured, requires strong consistency and ACID transactions, and must be queried with complex joins for reporting. The volume is moderate but expected to grow steadily. Which storage solution is most appropriate?
Select an answer first

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Data Collection, Integration, and Storage PCAD-31 Practice Questions (Page 2)

Questions 6–10

A company needs to store highly structured transactional data with strict consistency requirements, such as financial records. Which storage solution is most appropriate?

A business needs to decide whether to collect data through a customer survey or use existing purchase records. Which factor is most important when selecting the data collection method?

A company wants to understand why customer churn has increased over the last quarter. They need detailed insights into customer behavior and preferences. Which data collection method is most appropriate for this analytical goal?

A startup needs a storage solution that can easily scale to handle unpredictable growth in user-generated content, with flexible data structures. Which storage solution is most appropriate?

Keep studying — Data Acquisition and Pre-Processing