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Comptia-Data+ Data Data acquisition and preparation


Master Comptia-Data+ Data Data acquisition and preparation with our interactive study cards designed for effective learning. These flashcards use proven spaced repetition techniques to help you memorize key concepts, definitions, and facts. Perfect for students, professionals, and lifelong learners seeking to improve knowledge retention and ace exams through active recall practice.


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What is data acquisition?

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Process of collecting and importing data from various sources for analysis

What are common data sources?

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Databases APIs web scraping surveys files and IoT sensors

What is a database as a data source?

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Structured repository storing organized data accessible through queries

What is an API?

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Application Programming Interface allowing systems to communicate and exchange data

What is web scraping?

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Extracting data from websites using automated tools

What are flat files?

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Simple data files like CSV or text files with data in rows and columns

What is streaming data?

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Continuous flow of data generated in real-time from sources

What are examples of streaming data sources?

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Social media feeds sensor data and transaction logs

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What is batch data processing?

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Collecting and processing data in large groups at scheduled intervals

What is real-time data processing?

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Processing data immediately as it is generated or received

What is ETL?

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Extract Transform Load - process of moving data from sources to destination

What is the Extract phase of ETL?

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Pulling data from various source systems

What is the Transform phase of ETL?

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Converting data into desired format and structure

What is the Load phase of ETL?

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Inserting transformed data into target system or database

What is ELT?

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Extract Load Transform - loading data first then transforming in target system

What is the difference between ETL and ELT?

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ETL transforms before loading ELT loads then transforms in destination

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What is data integration?

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Combining data from multiple sources into unified view

What is data consolidation?

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Merging data from different sources into single location

What is data ingestion?

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Process of importing data into system for storage or processing

What is schema?

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Structure defining how data is organized in database

What is schema-on-write?

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Defining structure before loading data (traditional databases)

What is schema-on-read?

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Defining structure when reading data (data lakes)

What is data wrangling?

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Process of cleaning transforming and preparing data for analysis

What is data munging?

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Another term for data wrangling - manipulating raw data into usable format

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What is data cleaning?

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Identifying and correcting errors inconsistencies and inaccuracies in data

What are common data quality issues?

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Missing values duplicates inconsistent formats and outliers

What is handling missing data?

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Strategies for dealing with incomplete data records

What are methods for handling missing values?

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Deletion imputation or using algorithms that handle missing data

What is imputation?

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Filling in missing values using statistical methods or estimates

What is duplicate data?

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Records that appear multiple times in dataset

How do you handle duplicate records?

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Identify and remove duplicates keeping only unique records

What is data standardization?

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Converting data to common format or scale

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What is data normalization?

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Scaling numeric data to specific range typically 0 to 1

What is data transformation?

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Converting data from one format structure or type to another

What are types of data transformation?

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Aggregation filtering sorting merging and pivoting

What is data aggregation?

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Combining multiple data points into summary statistics

What is data parsing?

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Analyzing and breaking down data into components for processing

What is data validation?

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Checking data meets quality standards and business rules

What are validation rules?

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Constraints ensuring data accuracy and consistency

What is data type conversion?

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Changing data from one type to another (string to integer date to text)

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What is concatenation?

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Combining multiple data fields into single field

What is splitting data?

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Dividing single field into multiple separate fields

What is data enrichment?

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Enhancing data by adding information from external sources

What is data sampling?

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Selecting subset of data from larger dataset for analysis

What are sampling methods?

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Random sampling stratified sampling and systematic sampling

What is feature engineering?

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Creating new variables from existing data to improve analysis

What is binning?

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Grouping continuous data into discrete categories or ranges

What is encoding categorical data?

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Converting categorical variables into numeric format for analysis

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What is one-hot encoding?

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Creating binary columns for each category in categorical variable

What is data deduplication?

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Process of identifying and removing duplicate records from dataset

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