Aspect Ratio Data Science Consultant Interview Questions and Answers

Q1. Difference between logistic regression and svm
Ans. 
Logistic regression is a linear model used for binary classification, while SVM is a non-linear model that can handle complex decision boundaries.
• Logistic regression is a probabilistic model that predicts the probability of a binary outcome based on input features.

• SVM aims to find the hyperplane that best separates the classes in a high-dimensional space.

• Logistic regression is more interpretable and easier to implement...read more
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Q2. Data augmentation related questions
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There are simple technical test before manger round and it was very easy to crack

Q1. Why you interested in this job
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Q2. Are you comfortable in rational shift
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Q3. Tell me something about your study
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Q4. Do you read all the policy about companies
Ans. 
Yes, I make sure to thoroughly read and understand all company policies.
• I believe it is important to read and understand company policies to ensure compliance and avoid any misunderstandings.

• Reading company policies helps me stay informed about the rules and regulations within the organization.

• I make it a priority to review and familiarize myself with all policies to ensure I am following the correct procedures.

• For exa...read more
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Moderate level, maths reasoning questions

Q1. Why this job you want to do
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Q2. Why this job in gfk
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Q1. What is coalesce
Ans. 
Coalesce is a function used to return the first non-null value in a list of expressions.
• Coalesce function is commonly used in SQL to handle null values.

• It takes multiple arguments and returns the first non-null value.

• Example: COALESCE(column1, column2, 'default') will return the value of column1 if not null, else column2, and if both are null, it will return 'default'.
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Q2. What is repartition
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Repartition is the process of redistributing data across partitions in a distributed system.
• Repartitioning helps in balancing the workload and improving performance in distributed computing environments.

• It involves moving data between partitions based on certain criteria such as key values or hash functions.

• Repartitioning can be done in Spark using operations like repartition() or coalesce().
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Q1. Non repeatable character
Ans. 
A non repeatable character is a character that appears only once in a given string.
• Iterate through the string and count the frequency of each character

• Identify the characters that have a frequency of 1

• Return the first non repeatable character found
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Q2. Sort list without sort method
Ans. 
Sort list without using sort method
• Create a custom sorting function using loops

• Compare each element with every other element to determine the correct order

• Swap elements based on the comparison results
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Basic aptitude questions of quant and reasoning and general english

Case study of varies products asked around 15-20 which were easy to attempt

Q1. About yourself, practical knowledge, family, data related,etc.
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Q2. What is sql. Excel formulas
Ans. 
SQL is a programming language used for managing and manipulating relational databases. Excel formulas are used for performing calculations and data analysis in Microsoft Excel.
• SQL is used to retrieve, insert, update, and delete data from databases.

• Excel formulas are written using functions and operators to perform calculations and manipulate data.

• SQL example: SELECT * FROM customers WHERE age > 30;

• Excel formula example...read more
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Normal aptitude questions

Q1. Interview with manager
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There will be MCQ Questions. They will ask you to use internet and answer the questions.
They want to check your research skills.

Q1. If you are a fresher then you can easily clear the interview, Hr will ask normal questions about yourself and about your education background.
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