A data governance team needs to provide a single, curated view of customer data that currently resides in a CRM database, a data warehouse, and a set of CSV files. The team wants to avoid creating another physical data store. Which approach should the team take?

Copy all data into a new data lake.

Export everything to a single large CSV file.

Create a virtual data layer that queries the underlying sources and presents a unified schema.

Use a separate database for each source and query them individually.

A data analyst needs to analyze a dataset that is stored in a version-controlled repository. The repository contains files in multiple formats, including CSV, JSON, and Parquet. The analyst wants to load only the CSV files into a pandas DataFrame for initial exploration. Which approach is most efficient?

Clone the repository and use a glob pattern to read only the .csv files.

Convert all JSON and Parquet files to CSV before loading.

Use pandas to read the entire repository directory at once.

Manually download each CSV file from the repository's web interface.

Which file format is most commonly used for exchanging data between a web application and a server due to its lightweight and human-readable structure?

JSON (JavaScript Object Notation)

CompTIAData+

Domain 1Objective 2

Identify Data Sources DA0-001 Practice Questions (Page 1)

Part of the Data concepts and environments domain, which accounts for 20% of the DA0-001 exam. CompTIA does not publish an official question count, but from its 90-minute exam (~35–60 total, ~7–12 in this domain), expect 1–2 from this objective — we provide 31 practice questions to prepare you well beyond it. (estimate)

31questions here

7free pages

6concepts

20%of the exam

Questions 1–5

1expert · hard
A data governance team needs to provide a single, curated view of customer data that currently resides in a CRM database, a data warehouse, and a set of CSV files. The team wants to avoid creating another physical data store. Which approach should the team take?
Select an answer first
2application · medium
A data analyst needs to analyze a dataset that is stored in a version-controlled repository. The repository contains files in multiple formats, including CSV, JSON, and Parquet. The analyst wants to load only the CSV files into a pandas DataFrame for initial exploration. Which approach is most efficient?
Select an answer first
3foundation · easy
Which file format is most commonly used for exchanging data between a web application and a server due to its lightweight and human-readable structure?
Select an answer first
4foundation · easy
A data analyst needs to store customer records with a flexible schema, where each record may have different attributes. Which type of database is best suited for this requirement?
Select an answer first
5foundation · easy
A security analyst wants to investigate a series of failed login attempts on a server. Which data source would be most useful for this analysis?
Select an answer first

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Identify Data Sources DA0-001 Practice Questions (Page 1)

Questions 1–5

A data governance team needs to provide a single, curated view of customer data that currently resides in a CRM database, a data warehouse, and a set of CSV files. The team wants to avoid creating another physical data store. Which approach should the team take?

Which file format is most commonly used for exchanging data between a web application and a server due to its lightweight and human-readable structure?

A data analyst needs to store customer records with a flexible schema, where each record may have different attributes. Which type of database is best suited for this requirement?

A security analyst wants to investigate a series of failed login attempts on a server. Which data source would be most useful for this analysis?

Keep studying — Data concepts and environments