What is the process of extracting patterns and information from data called? A. Data WranglingB. Data VisualizationC. Data EngineeringD. Data Mining Which statistical measure represents the middle value of a dataset when it is sorted in ascending order? A. MedianB. MeanC. Standard DeviationD. Mode In Data Science, what is the purpose of feature engineering? A. … Read more
What is the process of converting text data into a numerical format so that it can be used in machine learning algorithms called? A. Data EncodingB. Data TokenizationC. Data ParsingD. Data Transformation Which data collection method involves selecting a sample from a larger population and collecting data from the sample only? A. ExperimentsB. Observational StudiesC. … Read more
What is the primary purpose of a bar chart in EDA? A. To visualize the distribution of dataB. To display relationships between variablesC. To compare multiple categoriesD. To identify missing values Which EDA technique is used to visualize the distribution of a single continuous variable? A. Box PlotB. HistogramC. Scatter PlotD. Bar Chart In EDA, … Read more
In data modeling, what is the term for the process of representing data as objects and their interactions in software applications? A. Hierarchical ModelingB. Relational ModelingC. Object-Oriented ModelingD. Entity-Relationship Modeling What is the primary purpose of a decision tree model in data modeling? A. To represent the structure of a databaseB. To predict outcomesC. To … Read more
Which machine learning algorithm is commonly used for image classification tasks and is based on convolutional neural networks (CNNs)? A. Decision TreeB. Naive BayesC. K-Means ClusteringD. Convolutional Neural Network (CNN) In machine learning, what is the term for the process of dividing a dataset into a training set and a testing set for model evaluation? … Read more
What is the primary role of a “Data Node” in the Hadoop Distributed File System (HDFS)? A. Storing metadataB. Managing job schedulingC. Storing and managing data blocksD. Managing data visualization Which Apache project provides a distributed, scalable, and highly available database for big data storage and processing? A. Apache KafkaB. Apache HBaseC. Apache SparkD. Apache … Read more
What is the primary use of a “corpus” in Natural Language Processing (NLP)? A. To perform machine translationB. To store and analyze a collection of textsC. To identify the sentiment of a textD. To generate random text Which NLP technique involves assigning a numerical value to each word in a document, typically representing word frequency … Read more
What is the primary objective of “data anonymization” in data ethics and privacy? A. To increase data accessibilityB. To protect sensitive informationC. To improve data qualityD. To reduce data volume In data science, what does “consent withdrawal” mean in the context of data collection? A. Collecting data without permissionB. Allowing data to be sharedC. Revoking … Read more
What is the primary goal of “customer churn prediction” in business analytics? A. Retaining existing customersB. Maximizing computational complexityC. Minimizing data storage costsD. Extracting actionable insights In data science, what is “data visualization” used for in business analytics? A. Collecting data from various sourcesB. Displaying data in graphical formC. Identifying patterns in dataD. Calculating data … Read more
Which data manipulation library in Python is commonly used for handling tabular data and data cleaning tasks? A. PandasB. MatplotlibC. NumPyD. Scikit-learn What tool is commonly used for distributed data processing and large-scale data analysis in data science? A. Apache HadoopB. Jupyter NotebookC. GitD. MySQL What is the primary role of “Matplotlib” in data science? … Read more