Free DA0-001 Practice Test Questions 2026

A large data download was divided into two smaller files. Which of the following describes the best way to fix this issue?

A. Blending the two data sets

B. Appending the two data sets

C. Merging the two data sets

D. Aggregating the two data sets

Which of the following descriptive statistical methods are measures of central tendency?
(Choose two.)

A. Mean

B. Minimum

C. Mode

D. Variance

E. Correlation

F. Maximum

Which of following is a non-relational database?

A. Neo4j

B. SQLite

C. MySQL

D. PostgreSQL

Which of the following data manipulation techniques should an analyst use to hide unnecessary data during analysis?

A. Filtering

B. Parametrization

C. Sorting

D. Indexing

A database administrator is required to mask certain table columns containing Pll in order to comply with the company privacy policy. Which of the following are the most likely types of information the administrator should mask? (Select two).

A. Government-issued ID

B. Address

C. Order ID

D. Order date

E. Customer ID

F. Referral number

Which of the following BEST describes standard deviation?

A. A measure that is used to establish a relationship between two variables

B. A measure of how data is distributed

C. A measure of the amount of dispersion of a set of values

D. A measure that is used to find the significant difference between variables

Which of the following query statements would be used when filtering data in a relational database management system? (Select two).

A. ORDER BY

B. HAVING

C. WHERE

D. SELECT

E. INSERT

F. GROUP BY

The ACME Corporation hired an analyst to detect data quality issues in their Excel documents. Which of the following are the most common issues? (Select TWO)

A. Apostrophe.

B. Commas.

C. Symbols.

D. Duplicates.

E. Misspellings.

Randy scored 76 on a math test, Katie scored 86 on a science test, Ralph scored 80 on a history test, and Jean scored 80 on an English test. The table below contains the mean and standard deviation of the scores for each of the courses:

Using this information, which of the following students had the BEST score?

A. Randy

B. Katie

C. Ralph

D. Jean

Which of the following should be accomplished NEXT after understanding a business requirement for a data analysis report?

A. Rephrase the business requirement.

B. Determine the data necessary for the analysis

C. Build a mock dashboard/presentation layout.

D. Perform exploratory data analysis.

Exhibit.

Which of the following logical statements results in Table B?

A. Option A

B. Option B

C. Option C

D. Option D

Given the below:

Which of the following numbers represents a Type I error?

A. 1

B. 2

C. 3

D. 4