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Data Scientist - Test

A data visualization tool that updates in real time and gives multiple outputs is called?
A data dashboard
A metrics table
A Data Table
None of the above
Which method shows hierarchical data in a nested format?
Tree Maps
Scatter Plot
Population Pyramid
Area Chart
What kind of chart is used to compare values for different categories
Line Chart
Column Chart
Scatter plot
Stacked Chart
What is the Python output for: print('2Xy@').lower()?
2xy@
2Xy@
2xy
Error
Which of the following is an immutable data type in Python?
List
Set
Dictionary
Tuple
Which special character is used to freeze a row or column in Microsoft Excel?
#
&
$
@
If we have not specified ASC or DESC after a SQL ORDER BY clause, the following is used by default
DESC
ASC
There is no default value
None of the mentioned
Which type of JOIN is used to returns rows that do not have matching values?
Natural JOIN
Outer JOIN
Equi JOIN
All of the above
We want to develop a low latency system with machine learning model. Which combination is best suitable?
Logistic Regression with L1 regularization
Hard Margin Support Vector Machine
KNN with Cosine Distance
GBDT with high depth
Which of the following probability distributions has undefined mean and variance?
Gaussian Distribution
Exponential Distribution
Cauchy Distribution
Triangular Distribution
R is an interpreted language so it can access through?
Disk operating system
User interface Operating System
Command line interpreter
Operating System
A cut off of 0.5 logistic regression means that if estimate probability of p(y=1)>0.5 then they are classified as
Class 1
Class 0
Both class 1 and class 0
None of the above
Which of the following NLP technique considers the semantic meaning?
Binary Bag of Words
TF-IDF
Word2Vec
Both B and C
Which of the following is NOT required for a binomial distribution?
There is fixed number of trials
Each trial has exactly two outcomes
There are more than 30 trials
The probability of success remains fixed for all trials
Which of the following gives each element of x's availability in y?
Y%>>%x
X %>% y
X%which%y
X%in%y
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