MCQs

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Overall MCQs for Reference

What is the primary purpose of data acquisition in data science?
a. Data visualization
b. Data cleaning
c. Data collection from various sources
d. Data modeling
Answer: c. Data collection from various sourcesmilestone+1
Which of the following is NOT an example of a data source for acquisition?
a. Sensors
b. Databases
c. Machine learning algorithms
d. Web APIs
Answer: c. Machine learning algorithmsgeeksforgeeks
In which step of the data science pipeline does data acquisition occur?
a. After model validation
b. Before data preprocessing
c. After data cleaning
d. Before deployment
Answer: b. Before data preprocessingibm+1
Which device is commonly used to convert physical signals into data during acquisition?
a. Oscilloscope
b. Sensor
c. Switch
d. Actuator
Answer: b. Sensordewesoft+1
Which method is often used for automated acquisition of online data?
a. Data mining
b. Web scraping
c. Data augmentation
d. Data encryption
Answer: b. Web scrapinglinkedin+1
What is a key characteristic of raw data acquired from a source?
a. Clean and ready for analysis
b. Contains noise and inconsistencies
c. Always structured
d. Processed and labeled
Answer: b. Contains noise and inconsistenciesmilestone
What is the function of a data acquisition system (DAQ)?
a. Sending signals to the real world
b. Acquiring and processing physical phenomena from the real world
c. Designing machine learning models
d. Managing databases
Answer: b. Acquiring and processing physical phenomena from the real worldexamradar+1
Which type of database is best suited for structured data acquisition?
a. NoSQL
b. Cloud database
c. Relational (SQL) database
d. In-memory database
Answer: c. Relational (SQL) databaselinkedin
What is commonly the first step in the data acquisition process?
a. Data validation
b. Data preprocessing
c. Identifying data sources
d. Data cleaning
Answer: c. Identifying data sourcesmilestone
Which tool is widely used for acquiring data from web pages?
a. TensorFlow
b. BeautifulSoup
c. MySQL
d. PowerBI
Answer: b. BeautifulSouplinkedin
What is data integration in the context of acquisition?
a. Visualizing data
b. Combining data from multiple sources into one dataset
c. Encrypting raw data
d. Feature engineering
Answer: b. Combining data from multiple sources into one datasetmilestone
Electrocardiogram is an example of which process in data science?
a. Data modeling
b. Data acquisition
c. Data visualization
d. Data mining
Answer: b. Data acquisitionsanfoundry
Which protocol is commonly used to acquire data from hardware sensors?
a. HTTP
b. IEEE 488
c. SMTP
d. FTP
Answer: b. IEEE 488examradar
What is manual data entry prone to?
a. Automation
b. High accuracy
c. Human errors
d. Fast data acquisition
Answer: c. Human errorsgeeksforgeeks
In which storage form is acquired data typically kept for large-scale processing?
a. Spreadsheet
b. Database or cloud storage
c. Hardcopy paper
d. USB flash drive
Answer: b. Database or cloud storageibm+1
What is a challenge in acquiring big data?
a. Low data volume
b. Data labeling
c. Managing high volume, velocity, and variety
d. Low processing speed
Answer: c. Managing high volume, velocity, and varietyibm
The process of cleaning errors and inconsistencies after acquisition is called:
a. Data acquisition
b. Data storage
c. Data preprocessing
d. Data modeling
Answer: c. Data preprocessingmilestone
Which data acquisition technique is best for real-time remote monitoring?
a. Paper surveys
b. IoT and sensor data
c. Manual entry
d. Web scraping
Answer: b. IoT and sensor datageeksforgeeks+1
What does a signal conditioner do in data acquisition?
a. Amplifies and cleans raw signals from sensors
b. Stores data in a database
c. Visualizes data
d. Models data
Answer: a. Amplifies and cleans raw signals from sensorssanfoundry
Published datasets from online repositories provide what type of data?
a. Unavailable data
b. Primary data
c. Secondary data
d. Synthetic data
Answer: c. Secondary datageeksforgeeks
Which is NOT considered a data acquisition method?
a. Collecting new data
b. Data validation
c. Sharing/exchanging data
d. Purchasing datasets
Answer: b. Data validationusgs
APIs are especially useful for what aspect of data acquisition?
a. Static reporting
b. Automated, real-time data retrieval
c. Manual data entry
d. Data encryption
Answer: b. Automated, real-time data retrievallinkedin+1
What is the primary reason for data validation after acquisition?
a. Reduce storage costs
b. Ensure data accuracy and completeness
c. Speed up visualization
d. Encrypt data
Answer: b. Ensure data accuracy and completenessibm+1
Which of these is an example of open source data for acquisition?
a. Kaggle datasets
b. Private company data
c. Proprietary research papers
d. Encrypted emails
Answer: a. Kaggle datasetslinkedin+1
What does the bit length of an ADC determine in data acquisition?
a. Processing speed
b. Resolution of digital signal
c. Storage protocol
d. File type
Answer: b. Resolution of digital signalexamradar
Data acquired via experiments is considered:
a. Primary data
b. Secondary data
c. Unstructured data
d. Synthetic data
Answer: a. Primary datageeksforgeeks
Which of the following is not typically part of a data acquisition system?
a. Digital to analog converter
b. Filter
c. Display
d. Timer
Answer: d. Timerexamradar
What does ‘data dredging’ or ‘data fishing’ refer to?
a. Cleaning data
b. Searching large datasets for patterns with no prior hypothesis
c. Encrypting data
d. Validating data
Answer: b. Searching large datasets for patterns with no prior hypothesissanfoundry
Which data source involves collecting data directly from behavior or environment?
a. Surveys
b. Observations
c. Synthetic datasets
d. Institutionalized databases
Answer: b. Observationsgeeksforgeeks
Which is an example of a signal that can be acquired in the physical world?
a. Temperature reading
b. SQL query
c. JSON file
d. HTML tag
Answer: a. Temperature readingdewesoft+1
What is the main goal of data preprocessing after acquisition?
a. Generate reports
b. Remove noise and structure data for analysis
c. Encrypt data
d. Visualize data
Answer: b. Remove noise and structure data for analysisibm+1
Which technique compiles data from various internet sources?
a. Data synthesis
b. Data scraping
c. Data encryption
d. Data integration
Answer: b. Data scrapinggeeksforgeeks
Which of the following is a disadvantage of public datasets?
a. Easy access
b. May be outdated or incomplete
c. Well-documented
d. High quality
Answer: b. May be outdated or incompletelinkedin
Data from IoT devices are primarily:
a. Static
b. Real-time and dynamic
c. Handwritten
d. Secondary
Answer: b. Real-time and dynamiclinkedin+1
What is the advantage of using APIs for data acquisition?
a. Manual operation
b. Large-scale automated data retrieval
c. Requires repeated human effort
d. Slow data collection
Answer: b. Large-scale automated data retrievallinkedin+1
Flash type ADC is characterized by:
a. Slow conversion
b. Fastest conversion time
c. High cost only
d. Low resolution
Answer: b. Fastest conversion timeexamradar
In data acquisition, which method involves questioning individuals?
a. Web scraping
b. Surveys
c. SQL querying
d. Signal conditioning
Answer: b. Surveysgeeksforgeeks
What should be ensured during data acquisition for machine learning?
a. Small sample
b. Data relevance and representativeness
c. Random file selection
d. Minimal storage
Answer: b. Data relevance and representativenessmilestone+1
Integration of data from multiple sources aims to:
a. Increase storage cost
b. Enhance data quality and context
c. Remove labels
d. Encrypt data
Answer: b. Enhance data quality and contextmilestone
The transformation of real-world signals to a digital domain for further analysis refers to:
a. Data cleansing
b. Data acquisition
c. Data visualization
d. Data mining
Answer: b. Data acquisitiondewesoft+1
Which is NOT a challenge of data acquisition in big data?
a. Volume
b. Velocity
c. Variety
d. Low data accuracy
Answer: d. Low data accuracyibm
The output of a successful data acquisition process is:
a. Processed and clean data
b. Raw, collected data in digital format
c. Data models
d. Visualized charts
Answer: b. Raw, collected data in digital formatibm+1
Which acquisition method utilizes hardware to measure environmental variables?
a. SQL query
b. DAQ hardware
c. API call
d. Search engine
Answer: b. DAQ hardwaredewesoft+1
What is the primary use of data warehouses in data acquisition?
a. Long-term storage and access to acquired data
b. Data cleaning
c. Visualization
d. Data labeling
Answer: a. Long-term storage and access to acquired datamilestone
Which acquisition method involves electronic signals generated by physical phenomena?
a. Data mining
b. Signal acquisition
c. Visualization
d. Charting
Answer: b. Signal acquisitiondewesoft+1
What should follow after identifying data sources during acquisition?
a. Data integration
b. Data collection
c. Modeling
d. Visualization
Answer: b. Data collectionibm+1
Dual slope integrating ADCs are characterized by:
a. Fastest conversion
b. High noise immunity and precision
c. Low cost only
d. Inaccessible output
Answer: b. High noise immunity and precisionexamradar
Which subsystem in data acquisition focuses on digitizing signals?
a. Analog input subsystem
b. Digital output subsystem
c. Display
d. Timer
Answer: a. Analog input subsystemexamradar
Which acquisition method offers the fastest data capture rate?
a. Manual entry
b. Flash ADC
c. Survey form
d. Web scraping
Answer: b. Flash ADCexamradar
Data acquired through web scraping must be:
a. Left unprocessed
b. Preprocessed to remove HTML tags and noise
c. Encrypted immediately
d. Deleted
Answer: b. Preprocessed to remove HTML tags and noisemilestone+1

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