Blog5 Most Common Machine Learning Interview Questions With Answers

5 Most Common Machine Learning Interview Questions With Answers

Machine learning interviews can be easy or difficult basis an individual’s knowledge of the basics. In a machine learning interview, questions depend on the industry focus and the job role. As we experience logistical, scientific, and economic upheavals across the world, machine learning has come up as a leading technical advancement, seeping into our lives. It is a subfield of AI where systems are equipped to perform complex tasks in a way a smart human would. A process of analyzing any form of data using a model created through training data. It is considered successful or not depending on the data quality and requires heavy expertise and experience in the field.

Read here for Understanding Difference Between Machine Learning and AI

Starting with the first range of screening many companies prefer conducting at-home assignments before calling in for the final interview. Like all interviews, the tip is not to lose any composure.

Common questions that might come up in the interview:

· Walk Us Through The Types Of Learning/Training Models In Machine Learning.

Supervised learning, unsupervised learning, and reinforcement learning are the main types. These can then be further divided into subtypes. Other types of common learning models include classification, clustering, deep learning, regression, and dimensionality reduction.

· How To Understand Which Algorithm To Use To Solve A Particular Problem?

Several steps and factors are needed to be weighed before selecting one algorithm for any Machine Learning problem. These include complexity, data structure, processing speed, accuracy requirements, unique features of the problem or variables, training model, and different parameters like the iterations needed.

· Distinguish Amongst Artificial Intelligence (AI), Deep Learning, And Machine Learning (ML)

Albeit closely interlinked, these 3 have significant differences. AI uses algorithms to allow machines to mimic human behaviour. It is an umbrella term that includes both machine and deep learning. Machine learning is dedicated to improving machines with experience using statistical methods. Deep learning, a subset of Machine Learning, is the study of neural networks that follows human brain functions.

Read Difference between Machine Learning and Deep Learning in brief.

· Differentiate Between Machine Learning And Deep Learning

Machine learning looks at sharpening accuracy without delving into the success ratio as much. While Deep Learning is all about achieving an accuracy of the highest degree while training with data of sufficient volume. Machine Learning is much less efficient as compared to the latter and not entirely suitable for synthesizing large quantities of data or longer dimensions. Caption generation, aggregation, sentiment-based news, and image analysis capture the efficiency of Deep Learning. Spam filtering, virtual assistance, and malware fitting are more up the machine learning alley.

· Expand On Machine Learning’s Application To Hardware

Primarily used in software applications, Machine Learning enhances hardware security, especially with Hardware Trojans and different counterfeit integrated circuits.

Bonus tip: Research the focus of the organization you are interviewing for and tailor your responses accordingly. Focus on the real-time relevance of the knowledge and apply theoretical concepts. Be clear and concise with your answers.


It is a fast-growing, dynamic, and lucrative field set to grow another 15% between 2021 and 2031. This comes with a plethora of opportunities and tough competition to make it in the field.

Also read:

Top Machine Learning Courses for 2023

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