Font size
WorksheetsThe MATRIX by DARVIX 2024 - ROUND 1
Total questions: 21
Worksheet time: 12mins
Which of the following is an example of a data visualization software?
SQL
Hadoop
Power BI
Apache Spark
In the context of data analytics, what does 'ETL' stand for?
Extract, Test, Load
Extract, Transform, Load
Execute, Transfer, Load
Extract, Transfer, Load
What is 'overfitting' in the context of machine learning?
When the model performs well on training data but poorly on new data
When the model generalizes well
When the model is too complex and captures noise along with the underlying pattern
When the model uses too little data
What does 'data wrangling' involve?
Data visualization
Cleaning and organizing data for analysis
Storing data in databases
Collecting data from sensors
Identify the person in the picture.
Geoffrey Hinton
Yann LeCun
Sebastian Thrun
Andrew Ng
Which library in Python is commonly used for data manipulation and analysis?
NumPy
SciPy
Pandas
Matplotlib
Which of the following is a type of chart used to show the relationship between two variables?
Bar chart
Line Chart
Pie Chart
Scatter Plot
In data analytics, what does the acronym "SQL" stand for?
Structured Query Language
Statistical Query Language
Statistical Query Logic
System Query Locator
What does V stand for in DARVIX?
(a)
Which of the following is NOT a primary task in the data analytics process?
Data collection
Data encryption
Data cleaning
Data visualization
Identify the software in the picture.
(a)
In data visualization, what is a 'choropleth map' used for?
Showing relationships between variables
Displaying time series data
Representing data values using colors on a geographical map
Comparing different categories
Which of the following techniques is used to handle missing data in datasets?
Imputation
Increasing sample size
Data augmentation
Data scaling
Choose the most appropriate option based on the following:
Statement I - Deep learning is a subset of Machine learning.
Statement II - Machine learning is not a subset of Artificial Intelligence.
Only Statement I is true
Only Statement II is true
Both Statements are true
Both Statements are false
Identify the company in the picture.
(a)
In a survey, 60% of respondents preferred only product A, and 40% preferred only product B. If 20 more respondents had preferred product A, the percentage would have increased to 65%. How many respondents were there in the survey?
(a)
You have a dataset with a mean of 70 and a standard deviation of 10. If you multiply every data point by 2, what will be the new mean and standard deviation?
Mean = 140, Standard deviation = 20
Mean = 70, Standard deviation = 10
Mean = 140, Standard deviation = 10
Mean = 140, Standard deviation = 40
If the probability density function of a continuous random variable X is given by 𝑓(𝑥)=3𝑥^2
For 0 ≤ 𝑥 ≤ 1, what is the expected value of X?
(a)
Which statistical test would you use to compare the means of three or more groups?
t-test
Chi-square test
ANOVA
Pearson correlation
Your marketing team has launched a new campaign, and you need to measure its effectiveness. What metrics would you consider, and how would you visualize the results to present to the stakeholders?
Website traffic, conversion rates, and sales data visualized using pie charts
Click-through rates, engagement rates, conversion rates, and sales data visualized using line graphs and bar charts
Social media likes and shares visualized using scatter plots
Customer satisfaction scores visualized using heat maps
You are tasked with reducing customer churn for a subscription-based service. What data would you analyze, and what predictive model would you develop to identify at-risk customers?
Analyze usage patterns, customer feedback, and support tickets, and develop a decision tree model to predict churn
Analyze demographic data and build a linear regression model
Analyze competitors' offerings and use k-means clustering to segment customers
Analyze marketing data and use a time series model to forecast churn
