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Data Science Interview Questions and Answers
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Questions
Data Science
+1
vote
Q: Why is dimension reduction important?
answered
May 9
in
Data Science
by
sharadyadav1986
reduction
dimension-reduction
data-science
+1
vote
Q: How do I switch from Developer to DevOps?
answered
Jan 30
in
Data Science
by
GeorgeBell
data-science
0
votes
Q: What is the difference between data analytics and data science?
answered
Nov 27, 2021
in
Data Science
by
DavidAnderson
data-science
0
votes
Q: What is the term Data Science?
answered
Nov 27, 2021
in
Data Science
by
DavidAnderson
data-science
0
votes
Q: What are Recommender Systems?
answered
Nov 16, 2021
in
Data Science
by
Robin
#recommender-systems
0
votes
Q: Write a basic SQL query that lists all orders with customer information.
answered
Oct 1, 2021
in
Data Science
by
Robin
sql-query
0
votes
Q: 'People who bought this also bought…' recommendations seen on Amazon are a result of which algorithm?
answered
Oct 1, 2021
in
Data Science
by
Robin
recommendation-engine
0
votes
Q: Write the equation and calculate the precision and recall rate.
answered
Oct 1, 2021
in
Data Science
by
Robin
precision-recall-rate
0
votes
Q: How can time-series data be declared as stationery?
answered
Oct 1, 2021
in
Data Science
by
Robin
time-series
0
votes
Q: How can outlier values be treated?
answered
Oct 1, 2021
in
Data Science
by
Robin
#outlier-values
0
votes
Q: What is the significance of p-value?
answered
Oct 1, 2021
in
Data Science
by
Robin
p-value
0
votes
Q: How do you find RMSE and MSE in a linear regression model?
answered
Oct 1, 2021
in
Data Science
by
Robin
regression-model
0
votes
Q: How should you maintain a deployed model?
answered
Oct 1, 2021
in
Data Science
by
Robin
deploy-model
model-deployment
0
votes
Q: How will you calculate eigenvalues and eigenvectors of the following 3x3 matrix?
answered
Oct 1, 2021
in
Data Science
by
Robin
matrix-calculation
0
votes
Q: What are dimensionality reduction and its benefits?
answered
Oct 1, 2021
in
Data Science
by
Robin
dimensionality-reduction
0
votes
Q: You are given a data set consisting of variables with more than 30 percent missing values. How will you deal with them?
answered
Oct 1, 2021
in
Data Science
by
Robin
data-sets
0
votes
Q: In your choice of language, write a program that prints the numbers ranging from one to 50.
answered
Oct 1, 2021
in
Data Science
by
Robin
number-print
0
votes
Q: What are the feature selection methods used to select the right variables?
answered
Oct 1, 2021
in
Data Science
by
Robin
feature-selection-methods
0
votes
Q: How do you build a random forest model?
answered
Oct 1, 2021
in
Data Science
by
Robin
random-forest-model
0
votes
Q: Explain the steps in making a decision tree.
answered
Oct 1, 2021
in
Data Science
by
Robin
decision-tree
0
votes
Q: How is logistic regression done?
answered
Oct 1, 2021
in
Data Science
by
Robin
logistic-regression
+1
vote
Q: What is the difference between supervised learning and unsupervised learning? Give concrete examples
answered
Jun 10, 2021
in
Data Science
by
Robindeniel
supervised-learning
unsupervised-learning
0
votes
Q: What is the difference between machine learning and deep learning?
answered
Jun 10, 2021
in
Data Science
by
Robindeniel
#machine-learning-vs-deep-learning
0
votes
Q: Provide a simple example of how an experimental design can help answer a question about behavior
answered
May 29, 2021
in
Data Science
by
Robindeniel
experimental-data
data-science
probability
0
votes
Q: Explain selection bias (with regard to a dataset, not variable selection).
answered
May 29, 2021
in
Data Science
by
Robindeniel
data-science
selection-bias
probability
0
votes
Q: What is the statistical power?
answered
May 29, 2021
in
Data Science
by
Robindeniel
statistical-power
probability
0
votes
Q: What is the Central Limit Theorem? Explain it. Why is it important?
answered
May 29, 2021
in
Data Science
by
Robindeniel
central0limit-theorem
limit-theorem
0
votes
Q: Explain what a long-tailed distribution is and provide three examples of relevant phenomena that have long tails.
answered
May 29, 2021
in
Data Science
by
Robindeniel
data-science
probability
0
votes
Q: How do you assess the statistical significance of an insight?
answered
May 29, 2021
in
Data Science
by
Robindeniel
statistical-significance
data-science
0
votes
Q: You are given 40 cards with four different colors- 10 Green cards, 10 Red Cards, 10 Blue cards, and 10 Yellow cards.
answered
May 29, 2021
in
Data Science
by
Robindeniel
data-pobability
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