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Technical Assessment_Optum IND

Quiz by Human Resource

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50 questions
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  • Q1
    Which of the following refers to a technique that groups similar data points together based on certain characteristics?
    Regression
    Clustering
    Time series analysis
    Sequential analysis
    30s
  • Q2
    What is the primary purpose of data cleaning in data analysis?
    To store data
    To collect data
    To improve data quality
    To visualize data
    30s
  • Q3
    What term describes a dataset that is too large to be processed by traditional data processing tools?
    Static data
    Big data
    Small data
    Moderate data
    30s
  • Q4
    What technique do data analysts use to fill in missing values in a dataset?
    Aggregation
    Imputation
    Clustering
    Normalization
    30s
  • Q5
    What do we call a visual representation of data intended to show the relationship between variables?
    Line graph
    Bar chart
    Pie chart
    Scatter plot
    30s
  • Q6
    Which method do data analysts commonly use to summarize and analyze the distribution of a dataset?
    Data mining
    Descriptive statistics
    Regression analysis
    Predictive modeling
    30s
  • Q7
    What is the purpose of a correlation coefficient in data analysis?
    To classify data into categories
    To measure the strength and direction of a relationship between two variables
    To visualize data trends
    To calculate averages
    30s
  • Q8
    Which of the following techniques is used to find relationships between variables in a dataset?
    Correlation analysis
    Data validation
    Data compression
    Data normalization
    30s
  • Q9
    What does 'ETL' stand for in data processing?
    Evaluate, Train, Link
    Edit, Transfer, Log
    Extract, Transform, Load
    Encrypt, Transfer, Load
    30s
  • Q10
    What is the purpose of a pivot table in data analysis?
    To clean data
    To run complex algorithms
    To create visual dashboards
    To summarize large amounts of data
    30s
  • Q11
    What is the primary purpose of data cleaning in data analysis?
    To improve data quality
    To visualize data trends
    To perform statistical tests
    To increase data volume
    30s
  • Q12
    What is the purpose of the SQL JOIN clause?
    To combine rows from two or more tables based on a related column
    To update existing records
    To insert new data into a table
    To create a new database
    30s
  • Q13
    Which SQL clause is used to sort the result set of a query?
    ORDER BY
    ARRANGE BY
    GROUP BY
    SORT BY
    30s
  • Q14
    Which SQL function is used to calculate the total number of rows in a table?
    SUM
    ADD
    TOTAL
    COUNT
    30s
  • Q15
    What clause is used to filter records in a SQL query?
    FILTER
    SELECT
    HAVING
    WHERE
    30s

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