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Air India ml engineer Interview Questions, Process, and Tips

Updated 17 Oct 2023

Air India ml engineer Interview Experiences

1 interview found

ml engineer Interview Questions & Answers

user image Monami Jaiswal

posted on 17 Oct 2023

Interview experience
4
Good
Difficulty level
Moderate
Process Duration
4-6 weeks
Result
No response

I applied via Referral and was interviewed in Apr 2023. There were 3 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Coding Test 

Data science, ML concepts, statistics, python output

Round 3 - Technical 

(7 Questions)

  • Q1. What does correlation mean? what is the interpretation if the correlation is 0?
  • Ans. 

    Correlation measures the strength and direction of a relationship between two variables. A correlation of 0 indicates no linear relationship.

    • Correlation measures the degree to which two variables move in relation to each other. It ranges from -1 to 1.

    • A correlation of 0 means there is no linear relationship between the variables. They are not related in a linear fashion.

    • For example, if the correlation between hours of s...

  • Answered by AI
  • Q2. What is collinearity, how to handle it? also for multicollinearity
  • Q3. How to evaluate regression models? explain r squared and adjusted r squared and difference between them
  • Ans. 

    Regression models can be evaluated using R squared and adjusted R squared to measure the goodness of fit.

    • R squared measures the proportion of the variance in the dependent variable that is predictable from the independent variables.

    • Adjusted R squared adjusts for the number of predictors in the model, providing a more accurate measure of goodness of fit.

    • R squared can be artificially inflated by adding more predictors, w...

  • Answered by AI
  • Q4. Explain regularization techniques, difference between ridge and lasso?
  • Ans. 

    Regularization techniques help prevent overfitting in machine learning models. Ridge regression adds L2 regularization, while Lasso regression adds L1 regularization.

    • Regularization techniques help prevent overfitting by adding a penalty term to the loss function.

    • Ridge regression adds the squared magnitude of coefficients as penalty term (L2 regularization).

    • Lasso regression adds the absolute magnitude of coefficients as...

  • Answered by AI
  • Q5. Explain working of decision trees, how to select parent and child nodes, gini impurity, etc?
  • Ans. 

    Decision trees are a popular machine learning algorithm used for classification and regression tasks.

    • Decision trees are a flowchart-like structure where each internal node represents a feature or attribute, each branch represents a decision rule, and each leaf node represents the outcome.

    • To select parent and child nodes, the algorithm calculates the best split at each node based on criteria like Gini impurity or inform...

  • Answered by AI
  • Q6. Bagging and boosting and their difference, what is ensemble models, how to handle overfitting, explain precision recall roc curve
  • Ans. 

    Explanation of bagging, boosting, ensemble models, handling overfitting, and precision-recall-ROC curve.

    • Bagging (Bootstrap Aggregating) involves training multiple models on different subsets of the training data and combining their predictions through averaging or voting.

    • Boosting involves training multiple models sequentially, with each model correcting the errors of its predecessor.

    • Ensemble models combine multiple ind...

  • Answered by AI
  • Q7. Create dictionary in python from 2 list and key values, sql query for window functions-Rank(), all joins in sql
  • Ans. 

    Creating dictionary in Python from 2 lists, using window functions and joins in SQL

    • To create a dictionary in Python from 2 lists and key values, you can use the zip() function

    • Example: dict(zip(keys_list, values_list))

    • For SQL window functions like Rank(), you can use the OVER() clause

    • Example: SELECT column1, column2, RANK() OVER(ORDER BY column3) AS rank_column FROM table_name

    • For SQL joins, you can use INNER JOIN, LEFT ...

  • Answered by AI

Interview Preparation Tips

Topics to prepare for Air India ml engineer interview:
  • Data Science
  • Machine Learning

Skills evaluated in this interview

Interview questions from similar companies

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
2-4 weeks
Result
Not Selected

I applied via Referral and was interviewed in Sep 2024. There were 2 interview rounds.

Round 1 - Technical 

(2 Questions)

  • Q1. Node js working in detail
  • Ans. 

    Node.js is a runtime environment that allows you to run JavaScript on the server side.

    • Node.js is built on Chrome's V8 JavaScript engine.

    • It uses an event-driven, non-blocking I/O model that makes it lightweight and efficient.

    • Node.js is commonly used for building server-side applications, APIs, and real-time applications.

    • It has a large ecosystem of libraries and frameworks, such as Express.js and Socket.io.

  • Answered by AI
  • Q2. Timer working in node
  • Ans. 

    In Node.js, timers can be implemented using functions like setTimeout() and setInterval().

    • Use setTimeout() to execute a function once after a specified delay

    • Use setInterval() to execute a function repeatedly at a specified interval

    • Clear a timer using clearTimeout() or clearInterval()

    • Example: setTimeout(() => { console.log('Timer executed!'); }, 2000);

  • Answered by AI
Round 2 - Behavioral 

(2 Questions)

  • Q1. HLD questions on db and backend
  • Q2. Relational non relational db

Skills evaluated in this interview

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. What is the internal implementation of Hashing and what is collision?
  • Ans. 

    Hashing is a technique used to map data to a fixed-size array, collision occurs when two different inputs produce the same hash value.

    • Hashing involves using a hash function to map data to a fixed-size array.

    • Collision happens when two different inputs produce the same hash value.

    • Common techniques to handle collisions include chaining and open addressing.

  • Answered by AI
  • Q2. Is time complexity of HashMap always O(1) ?
  • Ans. 

    No, time complexity of HashMap is not always O(1).

    • Time complexity of HashMap is O(1) on average, but can degrade to O(n) in worst case scenarios.

    • Worst case scenarios include hash collisions, which can lead to linear probing and degrade performance.

    • Load factor and capacity of the HashMap can also affect time complexity.

    • In scenarios where many keys hash to the same index, the time complexity can degrade.

  • Answered by AI
Round 2 - One-on-one 

(1 Question)

  • Q1. Yet to have the interview. Ambition box is forcefully making me enter these details

Skills evaluated in this interview

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
-

I applied via Approached by Company and was interviewed in Oct 2024. There were 2 interview rounds.

Round 1 - Coding Test 

1 dsa question 1 sql and 18 mcq questions

Round 2 - One-on-one 

(2 Questions)

  • Q1. Lot of questions from resumes and projects
  • Q2. Easy DSA questions and oops questions

Interview Preparation Tips

Interview preparation tips for other job seekers - work on you communication skills
Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Coding Test 

Tree algorithm about some riddels

Interview Preparation Tips

Interview preparation tips for other job seekers - tree algorithm
Interview experience
3
Average
Difficulty level
Hard
Process Duration
Less than 2 weeks
Result
-

I applied via Walk-in and was interviewed in Mar 2024. There were 2 interview rounds.

Round 1 - Assignment 

Tool test as been conducted

Round 2 - Technical 

(1 Question)

  • Q1. Technical round still awaiting
Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - One-on-one 

(2 Questions)

  • Q1. There were questions of DSA, DBMS, OS etc
  • Q2. There were questions around project that were mentioned in resume.

Interview Preparation Tips

Interview preparation tips for other job seekers - Prepare around Data structures and algorithms, Database management system, Operating system, projects that you have already done.
Interview experience
3
Average
Difficulty level
Moderate
Process Duration
4-6 weeks
Result
Selected Selected

I applied via Job Portal and was interviewed in May 2024. There were 2 interview rounds.

Round 1 - Aptitude Test 

Aerospace, Airplane related SW need to meet the DO178C, asking experiences with this

Round 2 - Case Study 

Related experiences and roles about the project with used DO178c

Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - One-on-one 

(2 Questions)

  • Q1. What is a defect
  • Q2. What is a quality

Interview Questionnaire 

1 Question

  • Q1. Why your choosing this job
  • Ans. I have so interested doing air lines
  • Answered Anonymously

Air India Interview FAQs

How many rounds are there in Air India ml engineer interview?
Air India interview process usually has 3 rounds. The most common rounds in the Air India interview process are Coding Test, Technical and Resume Shortlist.
What are the top questions asked in Air India ml engineer interview?

Some of the top questions asked at the Air India ml engineer interview -

  1. How to evaluate regression models? explain r squared and adjusted r squared and...read more
  2. bagging and boosting and their difference, what is ensemble models, how to hand...read more
  3. Explain working of decision trees, how to select parent and child nodes, gini i...read more

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Air India ml engineer Interview Process

based on 1 interview

Interview experience

4
  
Good
View more

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