Polestar Solutions & Services India Interview Questions, Process, and Tips for Experienced

Basic test of quant and reasoning

Q1. Sum of two numbers without using third variable
Ans. 
Add two numbers without using a third variable
• Use bitwise XOR operation to add the numbers without carry

• Use bitwise AND operation to calculate the carry

• Repeat the process until there is no carry left
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Q2. Probability questions on 3 color ball in different boxes etc.
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Q3. Find missing number in array
Ans. 
Find missing number in array of strings
• Convert strings to integers for comparison

• Iterate through the array to find the missing number

• Consider edge cases like empty array or multiple missing numbers
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Q1. Business analysis of two hypothetical companies and how they will perform under different scenarios
Ans. 
Comparing business analysis of two hypothetical companies under different scenarios
• Company A is a tech startup with high growth potential but also high risk

• Company B is a well-established retail chain with steady revenue but limited growth

• Under a booming economy, Company A is likely to outperform Company B due to its growth potential

• In a recession, Company B may fare better than Company A as consumers prioritize essent
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Q2. Questions based on interests and hobbies
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Q1. Tell me about yourself
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Q2. Why this company and field
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Q3. Strengths and weaknesses
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Q1. What is difference between applymap and join
Ans. 
applymap is used to map a value from one table to another while join is used to combine two or more tables based on a common field.
• applymap is used for one-to-one mapping while join is used for many-to-one mapping

• applymap is faster than join for small datasets

• join can handle more complex data relationships than applymap

• applymap can be used to replace null values with a default value

• join can be used to aggregate data fr
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Q2. Types of load in Qliksense
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There are two types of load in Qliksense: script load and data load.
• Script load involves loading and transforming data using the Qlik scripting language.

• Data load involves loading data from various sources into QlikSense for analysis and visualization.

• Script load is done in the script editor, while data load is done in the data manager.

• Examples of script load include loading data from a CSV file and transforming it usi...read more
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