Polestar Solutions & Services India Qliksense Developer Interview Questions and Answers

Q1. Related to Role and CV
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Q1. With the client. Current roles and responsibility and technical.
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10 questions - 45minutes

Q1. SQL joins based questions
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Q2. Excel VLOOKUP function
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Q1. Asked different variety of puzzles
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There were 10 questions and we were given 30 mins to solve them , questions were medium to hard level mcq

Question based on Probability , Logic (Puzzles) , Statistics

Q1. Question based on Logic(Puzzles) , mostly Statistics
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Q2. Explain Anova Test with real time example
Ans. 
Anova Test is used to compare means of three or more groups.
• Anova stands for Analysis of Variance

• It is used to determine if there is a significant difference between the means of three or more groups

• It compares the variance within groups to the variance between groups

• Real-time example: An Anova test can be used to compare the average salaries of employees in different departments of a company
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We have given 12 puzzles on hackerearth based on probability and statistics and have to solve in 45 minutes

Q1. There is a biased dice with the probability of 1 and 2 is 25% each. Find the probability of even number.
Ans. 
The probability of rolling an even number on a biased dice with 25% chance for 1 and 2 is 50%.
• The biased dice has a 25% chance for rolling a 1 and a 25% chance for rolling a 2, totaling 50% for odd numbers.

• Since there are only two odd numbers on a dice (1 and 2), the probability of rolling an even number is 50%.

• The probability of rolling an even number on a standard dice is 50% as well, since there are 3 even numbers o
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Q2. What is the pdf and pmf?
Ans. 
PDF stands for Probability Density Function and PMF stands for Probability Mass Function.
• PDF is used for continuous random variables while PMF is used for discrete random variables.

• PDF represents the probability distribution of a continuous random variable.

• PMF represents the probability distribution of a discrete random variable.

• Example: PDF can be used to calculate the probability of a random variable falling within a...read more
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Q1. The questions were asked regarding the Data science projects I did as a part of my PGP course. The interviewer was emphasizing on the logic I used in the Data science projects and how much I was clear abou...read more
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Q1. The questions were asked about the day-to-day roles and responsibilities as a BA in my previous organisation.
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