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I was interviewed in Jan 2024.
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Common ways to evaluate Time Series model include AIC, BIC, RMSE, MAE, ACF, PACF, etc.
Use Akaike Information Criterion (AIC) and Bayesian Information Criterion (BIC) to compare models
Calculate Root Mean Squared Error (RMSE) and Mean Absolute Error (MAE) to assess model accuracy
Analyze Autocorrelation Function (ACF) and Partial Autocorrelation Function (PACF) to check for autocorrelation in residuals
Use techniques like feature selection, regularization, PCA, and VIF to handle multicollinearity.
Perform feature selection to choose the most relevant variables for the model.
Apply regularization techniques like Lasso or Ridge regression to penalize high coefficients.
Utilize Principal Component Analysis (PCA) to reduce dimensionality and decorrelate variables.
Check for Variance Inflation Factor (VIF) to identify highly
TF IDF is a technique used in NLP to measure the importance of a word in a document within a collection of documents.
TF IDF stands for Term Frequency-Inverse Document Frequency.
It is used to determine how important a word is in a document relative to a collection of documents.
TF IDF is calculated by multiplying the term frequency (TF) of a word in a document by the inverse document frequency (IDF) of the word across al...
I was interviewed in May 2022.
Round duration - 60 Minutes
Round difficulty - Easy
Round duration - 60 Minutes
Round difficulty - Easy
There were 10 MCQs ranging from Aptitude to Programming MCQs to basics of Data Science.
The coding question only the optimized solution was accepted
Given an array 'arr' containing single-digit integers, your task is to calculate the total sum of all its elements. However, the resulting sum must also be a single-...
Calculate the total sum of array elements until a single-digit number is obtained by repeatedly summing digits.
Iterate through the array and calculate the sum of all elements.
If the sum is a single-digit number, return it. Otherwise, repeat the process of summing digits until a single-digit number is obtained.
Return the final single-digit sum.
Round duration - 45 minutes
Round difficulty - Easy
The interview happened in the evening. It was an online video call.
The interviewer was very cooperative. I would say it was rather a discussion session between us.
Given a linked list where each node contains two pointers: one pointing to the next node and another random pointer that can point to any node within the list (or ...
Create a deep copy of a linked list with random pointers.
Iterate through the original linked list and create a new node for each node in the list.
Store the mapping of original nodes to new nodes in a hashmap to handle random pointers.
Update the random pointers of new nodes based on the mapping stored in the hashmap.
Return the head of the copied linked list.
Round duration - 10 Minutes
Round difficulty - Easy
It was late night
It was a telephonic call
Tip 1 : Start your preparation early. Start from the very basics before directly moving onto DSA. Get a grasp of the basics in each topic. Practice different varieties of questions from each topic. I would recommend at least 200 questions of DSA.
Tip 2 : Revise your projects before you attend any interview. This is extremely important. You must be able to clearly explain your project along with your role in the project in layman terms to the interviewer.
Tip 3 : Grind hard to achieve your goals but don't take much stress. There's a long way to go.
Tip 1 : Never, I say never put false things or your friends project in your resume
Tip 2 : Make a 1 page resume. Make your resume in such a way that the interviewer must be able to see the things you want him to see in the very first scan.
I applied via Job Portal and was interviewed in Dec 2021. There were 2 interview rounds.
I applied via Referral and was interviewed before Jul 2023. There were 2 interview rounds.
If else conditions, data merging, datetime conversions, EDA on a sample data set, duplicates removal and missing value imputation
To target customers for a kids account, focus on features like parental controls, educational content, and interactive games.
Implement parental controls to assure parents of child safety online.
Include educational content to attract parents looking for learning opportunities.
Incorporate interactive games to engage children and make the account more appealing.
Offer rewards or incentives for completing educational activi...
I applied via Naukri.com and was interviewed in May 2023. There were 2 interview rounds.
Use a regression algorithm like linear regression or decision tree regression.
Consider using linear regression if the relationship between variables is linear.
Decision tree regression can handle non-linear relationships between variables.
Evaluate the performance of different algorithms using cross-validation.
Consider the interpretability of the model when choosing an algorithm.
posted on 6 Jan 2025
SQL & aptitude question
1 coding question for 45 min
I applied via Referral and was interviewed before Aug 2023. There were 2 interview rounds.
Python test is taken
Cross validation is a technique used to assess the performance of a predictive model by splitting the data into training and testing sets multiple times.
Cross validation helps to evaluate how well a model generalizes to new data.
It involves splitting the data into k subsets, training the model on k-1 subsets, and testing it on the remaining subset.
Common types of cross validation include k-fold cross validation and lea...
I applied via Campus Placement and was interviewed in Jan 2022. There were 3 interview rounds.
Coding related objective questions
based on 1 interview
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