CompTIA Data+: DAO-001 Certification Guide

Table of Contents

Preface

Part 1: Preparing Data

1

Introduction to CompTIA Data+

Understanding Data+

CompTIA Data+: DAO-001

Data science

Introducing the exam domains

Data Concepts and Environments

Exam format

Who should take the exam?

Summary

2

Data Structures, Types, and Formats

Understanding structured and unstructured data

Structured databases

Unstructured databases

Relational and non-relational databases

Going through a data schema and its types

Star schema

Snowflake schema

Understanding the concept of warehouses and lakes

Data warehouses

Data marts

Data lakes

Updating stored data

Updating a record with an up-to-date value

Changing the number of variables being recorded

Going through data types and file types

Data types

Variable types