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Data Science Interview Questions and Answers
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Questions
Data Science
0
votes
Q: How do you find RMSE and MSE in a linear regression model?
asked
Oct 1, 2021
in
Data Science
by
Robin
regression-model
0
votes
Q: How should you maintain a deployed model?
asked
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?
asked
Oct 1, 2021
in
Data Science
by
Robin
matrix-calculation
+1
vote
Q: What are dimensionality reduction and its benefits?
asked
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?
asked
Oct 1, 2021
in
Data Science
by
Robin
data-sets
+1
vote
Q: In your choice of language, write a program that prints the numbers ranging from one to 50.
asked
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?
asked
Oct 1, 2021
in
Data Science
by
Robin
feature-selection-methods
0
votes
Q: How do you build a random forest model?
asked
Oct 1, 2021
in
Data Science
by
Robin
random-forest-model
+1
vote
Q: Explain the steps in making a decision tree.
asked
Oct 1, 2021
in
Data Science
by
Robin
decision-tree
0
votes
Q: How is logistic regression done?
asked
Oct 1, 2021
in
Data Science
by
Robin
logistic-regression
+1
vote
Q: Provide a simple example of how an experimental design can help answer a question about behavior
asked
May 29, 2021
in
Data Science
by
Robindeniel
experimental-data
data-science
probability
+1
vote
Q: Explain selection bias (with regard to a dataset, not variable selection).
asked
May 29, 2021
in
Data Science
by
Robindeniel
data-science
selection-bias
probability
+1
vote
Q: What is the statistical power?
asked
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?
asked
May 29, 2021
in
Data Science
by
Robindeniel
central0limit-theorem
limit-theorem
+1
vote
Q: Explain what a long-tailed distribution is and provide three examples of relevant phenomena that have long tails.
asked
May 29, 2021
in
Data Science
by
Robindeniel
data-science
probability
+1
vote
Q: How do you assess the statistical significance of an insight?
asked
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.
asked
May 29, 2021
in
Data Science
by
Robindeniel
data-pobability
+1
vote
Q: You are about to get on a plane to London, you want to know whether you have to bring an umbrella or not
asked
May 29, 2021
in
Data Science
by
Robindeniel
data-science
data-probability
0
votes
Q: Make an unfair coin fair
asked
May 29, 2021
in
Data Science
by
Robindeniel
data-probability
+1
vote
Q: How can you tell if a given coin is biased?
asked
May 29, 2021
in
Data Science
by
Robindeniel
data-science
data-probability
0
votes
Q: You are at a Casino and have two dices to play with
asked
May 29, 2021
in
Data Science
by
Robindeniel
data-science
data-probability
+1
vote
Q: A box has 12 red cards and 12 black cards. Another box has 24 red cards and 24 black cards.
asked
May 29, 2021
in
Data Science
by
Robindeniel
data-science
probability
+1
vote
Q: Describe Markov chains?
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
markov-chains
markov-algo
+2
votes
Q: Walk through the probability fundamentals
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
probability-fundamentals
probability
+2
votes
Q: Difference between convex and non-convex cost function; what does it mean when a cost function is non-convex?
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
data
data-science
probability
data-probability
convex
non-convex
+2
votes
Q: You randomly draw a coin from 100 coins — 1 unfair coin (head-head), 99 fair coins (head-tail) and roll it 10 times.
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
data
pobability
data-probability
+2
votes
Q: The probability that item an item at location A is 0.6, and 0.8 at location B. What is the probability that item would be found on Amazon website?
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
data
probability
amazon
data-probability
+1
vote
Q: What is boosting?
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
boosting
boosting-algorithm
data-boosting
+2
votes
Q: What is overfitting?
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
overfitting
data-science
data-overfitting
+2
votes
Q: Is it beneficial to perform dimensionality reduction before fitting an SVM? Why or why not?
asked
May 28, 2021
in
Data Science
by
sharadyadav1986
svm
data-science
svm-fitting
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