Virtusa Consulting Services Senior Analyst Interview Questions and Answers

They had ask the simple question during my interview process, here is the list if all questions:
1) what is df.copy()
2)why we choose inplace = True
3) Tfidf
4) confusion Matrix
5) can we use continuous variables for logistic regression
6)list and tuple diff
7)N grams, bag of words
8)access a column
9)lambda fn
10)method and object oops concepts
11) how to tackle Nan values
12) what is index in SQL
13)what is gini coefficient
14)when will you use linear regression and when you will use Decision Tres.
15) Random forest
16)Oops concepts
17)how to calculate the coefficient
18)PCA
19)SL/USL
20) classification/Regression
21)SVM
22)DT, RF, Hyper parameters in RF
23)how neural network works
24)NlP

Q1. Power bi and Tableau tools- 1) cross filter
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Q1. Basic questions on testing.
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Q2. Write sample code on some basic queries supplied during interview.
Ans. 
Sample code for basic queries
• Use SELECT statement to retrieve data from a table

• Use WHERE clause to filter data based on conditions

• Use ORDER BY clause to sort data in ascending or descending order

• Use GROUP BY clause to group data based on a column

• Use JOIN clause to combine data from multiple tables
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Q1. Introduction confirmation about the interview schedule.
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Q1. Go through your resume
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Q2. Testing core knowledge on applied domine.
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Q1. About the salary negotiation.
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Q1. About yourself and technology you know
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Q1. Explain Modal Analysis ??
Ans. 
Modal analysis is a technique used to study the dynamic behavior of structures under different loads.
• Modal analysis involves determining the natural frequencies, damping ratios, and mode shapes of a structure.

• It helps in understanding how a structure will respond to different types of loads and vibrations.

• Modal analysis is commonly used in the aerospace, automotive, and civil engineering industries.

• For example, modal a...read more
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