Mad Street Den Interview Experience for Machine Learning Engineer | On-Campus 2021

Mad street Den visited our campus for 2 profiles, Software engineer and Machine Learning Engineer. I Applied for Machine Learning Engineer.75 students were selected for the online round. 

Round 1: Online Round

It was conducted on the HackerEarth platform. There were 20 MCQ  and 2 coding questions. Coding questions were of medium level. There was a negative marking in MCQ (+1, -1). MCQ were based on 

• Statistics
• Probability
• Machine Learning
• DBMS
• Python

10 Students were selected for Technical interviews. 

Round 2: Technical Interview 1 

There were 2 panelists in an interview. They asked me to introduce myself and to explain any one of my projects mentioned in the resume. Then he did a lot of counter questions on my project. 

• Is it always good to have accuracy as an evaluation metrics? What are other alternatives?
• What are precision and recall, when to use these as our evaluation metrics?
• How to use logistic regression for multiclass classification (one vs all )
• How to train a model where one image has more than 1 label.
• Advantages of YOLO Algorithm?
• Why do we use Anchor boxes in Yolo?
• What is cache memory?
• How will you replace the contents of cache memory if it’s fully occupied (Hint:  LRU Cache)
• What is SQL?
• Types of joins in SQL?

4 students were shortlisted for the next round.

Round 3: Technical Interview 2

The interviewer asked me to introduce myself and then asked me to explain any project. He asked few project-related questions. After that, he asked me to share my screen and gave me a problem to solve.    

• To find IOU ( Intersection over Union  ) of 2 rectangles. The top left and bottom right coordinates of both rectangles were given as input. I was able to solve the problem but not in an optimized way.
• To remove duplicate entries maintaining the order of appearance. ( I solved it, but he was looking for a one-liner)
• Then interviewer shared a link, there were 3 SQL query-based MCQs and asked me to solve those questions.

Result: 2 Students were finally selected, and I was not among them.