Pass CompTIA DA0-002 PDF Dumps Recently Updated 206 Questions [Q30-Q45]

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Pass CompTIA DA0-002 PDF Dumps | Recently Updated 206 Questions

Updated Test Engine to Practice DA0-002 Dumps & Practice Exam

CompTIA DA0-002 Exam Syllabus Topics:

Section	Weight	Objectives
Data Mining	25%	– Data enrichment and integration 1. Joining and merging datasets 2. Data mapping and lineage 3. Derived columns and calculated fields – Data preparation and cleansing 1. Handling missing values and duplicates 2. Data cleaning techniques 3. Data normalization and transformation – Data acquisition and collection 1. Data sources and ingestion methods 2. ETL/ELT processes 3. APIs and connectors
Visualization	15%	– Storytelling with data 1. Audience-appropriate visuals 2. Executive summaries and key insights 3. Narrative techniques for data communication – Dashboard and report design 1. Visualization best practices 2. Dashboard components and layout 3. Chart types and their applications
Data Concepts and Environments	20%	– Data structures and formats 1. Structured, semi-structured, and unstructured data 2. Common data formats (JSON, XML, CSV) 3. File types and their use cases – Database fundamentals 1. Cloud and containerized data environments 2. Schemas and data models 3. Relational vs. non-relational databases – Data types and metadata 1. Data types (string, numeric, Boolean, date) 2. Metadata and its role in data management
Data Governance, Quality, and Controls	16%	– Security and privacy 1. Audit trails and logging 2. Foundational AI considerations in data lifecycle 3. Data classification and protection 4. Access controls and encryption – Data governance frameworks 1. Policies, standards, and procedures 2. Compliance requirements (GDPR, CCPA, etc.) 3. Data stewardship and ownership – Data quality management 1. Quality dimensions (accuracy, completeness, consistency) 2. Quality assessment and monitoring 3. Remediation strategies
Data Analysis	24%	– Inferential statistics 1. Hypothesis testing 2. Confidence intervals 3. Correlation and regression basics – Analysis tools and techniques 1. Libraries and functions for analysis 2. BI platforms and notebooks 3. SQL for data analysis – Descriptive statistics 1. Measures of dispersion 2. Data distributions 3. Measures of central tendency

QUESTION 30
A sales manager wants to understand how sales are trending year over year. Which of the following chart types is the most appropriate to display the information?

Line

Donut

Bubble

Hierarchy

QUESTION 31
Which of the following AI types is the best option for time-series forecasting?

Generative AI

Foundational models

Natural language processing

Robotic process automation

QUESTION 32
A senior manager needs a report that can be generated and accessed at any time. Which of the following delivery methods should a data analyst use?

Ad hoc

Dynamic

Self-service

Static

QUESTION 33
A data analyst needs to combine the results of two separate queries that have similar data and the same number of columns. The output must also have distinct rows. Which of the following should the data analyst use?

Outer join

Aggregate

Union

Concatenate

QUESTION 34
Which of the following best describes the method used to combine files, software, and libraries for use on various operating systems and environments?

Package manager

Code repository

Virtual machine

Containerization

QUESTION 35
A data analyst is building a new report using data from a sales column. Upon review, the analyst finds that the sales date is stored as a character type. Which of the following function types should the analyst use to filter by a specific month?

Mathematical

String

Logical

Table

QUESTION 36
A data analyst receives an email from the IT department about renewing the company password, and the analyst follows the password reset link as required. Later in the week, the analyst receives the following notification when running a recurring analysis that connects to the database:
Log-in failed for user ‘<username>’
Which of the following is most likely the reason for this issue?

The company changed its database authentication method.

The password expiration process locked the account.

The analyst did not change the password used to launch the report.

The company is experiencing issues with password replication.

QUESTION 37
A data analyst is joining two tables with different content and one common field. Which of the following should the analyst do to most efficiently meet this requirement?

Match the records of the related columns and merge the tables.

Create a cluster to facilitate data integration between the tables.

Explode both tables to identify unique values and reorder the fields in one table.

Append the values of the matching columns and concatenate the other data fields.

QUESTION 38
A company needs to display sales numbers on the intranet. This solution needs to be updated every day before the workday starts. Which of the following is the best solution to meet this objective?

Enhancing the current self-service portal with new download options

Running an ad hoc query that extracts data from the warehouse

Building a report that is emailed every morning

Developing a dynamic dashboard that refreshes nightly

QUESTION 39
A data analyst is generating a custom report for a Chief Executive Officer’s executive meeting. Later, the analyst learns that other custom reports will be required for future executive meetings. Which of the following delivery methods should the analyst use?

Ad hoc

Real-time

Recurring

Self-service

QUESTION 40
An administrator needs to design a table that will include foreign words. Which of the following is the best option for storing non-native language characters?

VARCHAR

NVARCHAR

CLOB

CHAR

QUESTION 41
A data analyst needs to create and deliver a dashboard that displays the company’s financial transactions as they are updated. Which of the following delivery methods should the analyst consider? (Select two).

Real-time

Snapshot

Dynamic

Static

Ad hoc

Time series

QUESTION 42
Which of the following is business intelligence software?

SAS

Python

Notepad++

Tableau

QUESTION 43
Which of the following data repositories stores unformatted data in its original, raw form?

Data warehouse

Data silo

Data lake

Data mart

QUESTION 44
A data analyst receives a report from a dashboard user stating that their report is taking longer than usual to load. The user needs five components for the dashboard. However, upon investigating, the analyst notices ten components that are attempting to load. Which of the following steps should the analyst take to correct this issue?

Check with the network team for stale network connections.

Check with administrators to review the logs of the report server.

Check the filters to include only the required information.

Check the refresh rate on the report server.

QUESTION 45
An engineer needs to build an ETL process to calculate the average sales of individual stores.
Each store sends their sales data as .csv files. Which of the following would the engineer most likely do to the data?

Parse the files to create individual data sets

Convert the values to different data types

Impute any missing date values

Merge the files with an open-source data set