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I applied via Instahyre and was interviewed in Feb 2024. There were 2 interview rounds.
Answering common questions related to data science concepts and techniques.
To handle model overfitting, one can use techniques like cross-validation, regularization, and early stopping. For model underfitting, consider using more complex models or adding more features.
Standardizing data is important for algorithms like K-Nearest Neighbors and Support Vector Machines. It is not required for tree-based models like Decisi...
Use target encoding or frequency encoding to encode categorical columns without increasing feature count.
Use target encoding: Encode categorical column with the mean of the target variable for each category.
Use frequency encoding: Encode categorical column with the frequency of each category in the dataset.
Both methods preserve the information of the categorical column without increasing feature count.
Answers to questions related to Linear Regression, K-Means, and SVM in data science.
Assumptions of Linear Regression include linearity, independence, homoscedasticity, and normality of errors.
Euclidean distance formula in K-Means is the square root of the sum of squared differences between two points.
SVM works by finding the hyperplane that best separates the classes in the feature space.
SVM on non-linearly separable d...
Decision Trees are single trees while Random Forest is a collection of trees. Random Forest grows multiple trees to improve accuracy and reduce overfitting.
Decision Trees are individual trees that make decisions based on features of the data.
Random Forest is an ensemble method that combines multiple Decision Trees to improve accuracy and reduce overfitting.
Random Forest grows a lot of Decision Trees to increase diversi...
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I applied via Referral and was interviewed in Sep 2022. There were 4 interview rounds.
First round of test consisted of sql questions , medium and easy level
I applied via Referral and was interviewed before Aug 2023. There were 3 interview rounds.
Sql mainly windows function aggregate function
How would you imprpve netflix recommendation system.
I applied via LinkedIn and was interviewed in Feb 2023. There were 3 interview rounds.
Hackerrank test medium difficulty
Presenting the case study which was given as a take-home assignment
Python based EDA assignment
I applied via Company Website and was interviewed before Sep 2020. There were 5 interview rounds.
I applied via Recruitment Consulltant and was interviewed before Feb 2021. There were 2 interview rounds.
I was interviewed before Mar 2021.
Round duration - 90 Minutes
Round difficulty - Medium
Determine if a given singly linked list of integers forms a cycle or not.
A cycle in a linked list occurs when a node's next
points back to a previous node in the ...
Detect if a singly linked list forms a cycle by checking if a node's next points back to a previous node.
Use Floyd's Cycle Detection Algorithm to determine if there is a cycle in the linked list.
Maintain two pointers, one moving at double the speed of the other, if they meet at any point, there is a cycle.
If one of the pointers reaches the end of the list (null), there is no cycle.
Given a list of integers of size N
, your task is to determine the Next Greater Element (NGE) for every element. The Next Greater Element for an element X
is the firs...
Find the Next Greater Element for each element in a list of integers.
Iterate through the list of integers from right to left.
Use a stack to keep track of elements for which the Next Greater Element is not yet found.
Pop elements from the stack until a greater element is found or the stack is empty.
Assign the Next Greater Element as the top element of the stack or -1 if the stack is empty.
Round duration - 60 Minutes
Round difficulty - Medium
Designing an ATM machine involves considering user interface, security measures, transaction processing, and hardware components.
User interface should be intuitive and easy to navigate for users of all ages.
Implement security measures such as PIN entry, card authentication, and encryption to protect user data.
Transaction processing should be fast and reliable, with options for cash withdrawals, deposits, transfers, and...
Round duration - 45 Minutes
Round difficulty - Easy
Tip 1 : Practice DSA daily
Tip 2 : Try to think of the solution first before jumping to the solution
Tip 3 : Go through interview experience
Tip 4 : Have mock interviews
Tip 1 : Know in depth what is there in your resume
Tip 2 : Mention your skills and work properly
I applied via Walk-in and was interviewed before Feb 2021. There was 1 interview round.
Some of the top questions asked at the Angel One Data Scientist 2 interview -
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