Top 50 H20 interview questions and answers

H20 interview questions and answers

Table of Contents

1) What is AutoML in H2O?

H2O’s Automatic Machine Learning (AutoML)

H2O is a fully open-source, distributed in-memory machine learning platform with linear scalability. … H2O AutoML can be used for automating the machine learning workflow, which includes automatic training and tuning of many models within a user-specified time-limit.

2) Is H2O driverless AI open source?

H2O is the open source leader in AI with a mission to democratize AI.

3) What is used for?

H2O is a fully open source, distributed in-memory machine learning platform with linear scalability. H2O supports the most widely used statistical & machine learning algorithms including gradient boosted machines, generalized linear models, deep learning and more.

4) What is H2O model?

H2O is a Java-based software for data modeling and general computing. There are many different perceptions of the H2O software, but the primary purpose of H2O is as a distributed (many machines), parallel (many CPUs), in memory (several hundred GBs Xmx) processing engine.

5) How do I run H2O in Python?

Open a Terminal window and launch jupyter notebook. Create a new Python notebook by selecting the New button in the upper left corner. At this point, you can begin using Jupyter Notebook to run H2O Python commands.

6) How do I install H2O?

Install on Hadoop

Go to Click on the Install on Hadoop tab, and download H2O for your version of Hadoop. This is a zip file that contains everything you need to get started. Point your browser to H2O.

7) What is auto Sklearn?

Auto-Sklearn is an open-source library for performing AutoML in Python. It makes use of the popular Scikit-Learn machine learning library for data transforms and machine learning algorithms and uses a Bayesian Optimization search procedure to efficiently discover a top-performing model pipeline for a given dataset.

8) What is stacked ensemble?

Stacking or Stacked Generalization is an ensemble machine learning algorithm. … The benefit of stacking is that it can harness the capabilities of a range of well-performing models on a classification or regression task and make predictions that have better performance than any single model in the ensemble.

9) Is h20 AutoML free?

H2O 3 (open-source) is a free library on python/R that contains many ML algorithms, models and tuning features that make machine learning more efficient. The Driverless AI, on the other hand, is an enterprise product that has its own platform, UI and UX.

10) How much does h20 AI cost?

Overview. H2O is a complex AI platform. As H2O writes, they’re focused on offering “sophisticated AI technology.” Taking a look at public list prices, we can see that an H2O Driverless AI subscription starts at $300,000. In contrast, Obviously AI specializes in affordable no-code AI that can be built in minutes.

11) Who created h20 AI?

Sri Ambati
Sri Ambati is the founder and CEO of

12) Who is the founder of H2O?

Sri Ambati
Sri Ambati founded innovative AI cloud platform company in 2011 with a mission to democratize AI for everyone.

13) What is h20 driverless AI?

H2O Driverless AI is an artificial intelligence (AI) platform for automatic machine learning. Driverless AI automates some of the most difficult data science and machine learning workflows such as feature engineering, model validation, model tuning, model selection, and model deployment.

14) What is h20 Python?

H2O from Python is a tool for rapidly turning over models, doing data munging, and building applications in a fast, scalable environment without any of the mental anguish about parallelism and distribution of work.

15) What is the best AutoML?

Below are the five tools that simplify using machine learning algorithms.

PyCaret. PyCaret is an open-source, low-code machine learning library in Python that aims to reduce the cycle time from hypothesis to insights.

Auto-SKLearn. …

MLBox. …


H2O. …

Auto-Keras. …


16) What is AutoML in Python?

AutoML are techniques for automatically and quickly discovering a well-performing machine learning model pipeline for a predictive modeling task. … The three most popular AutoML libraries for Scikit-Learn are Hyperopt-Sklearn, Auto-Sklearn, and TPOT.

17) What is HyperOpt-Sklearn?

HyperOpt and HyperOpt-Sklearn

HyperOpt is an open-source Python library for Bayesian optimization developed by James Bergstra. It is designed for large-scale optimization for models with hundreds of parameters and allows the optimization procedure to be scaled across multiple cores and multiple machines.

18) What is difference between boosting and bagging?

Bagging is a technique for reducing prediction variance by producing additional data for training from a dataset by combining repetitions with combinations to create multi-sets of the original data. Boosting is an iterative strategy for adjusting an observation’s weight based on the previous classification.

19) What is bias vs variance tradeoff?

Bias is the simplifying assumptions made by the model to make the target function easier to approximate. Variance is the amount that the estimate of the target function will change given different training data. Trade-off is tension between the error introduced by the bias and the variance.

20) What is gradient boosting regression?

Gradient boosting is a machine learning technique used in regression and classification tasks, among others. It gives a prediction model in the form of an ensemble of weak prediction models, which are typically decision trees.

21) What is CatBoost used for?

CatBoost is an algorithm for gradient boosting on decision trees. It is developed by Yandex researchers and engineers, and is used for search, recommendation systems, personal assistant, self-driving cars, weather prediction and many other tasks at Yandex and in other companies, including CERN, Cloudflare, Careem taxi.

22) Is AutoML open source?

In response, we have developed Pharm-AutoML, an open-source Python package that enables users to automate the construction of ML models and predict clinical outcomes, especially in the context of pharmacological interventions

23) What is auto Weka?

Auto-WEKA considers the problem of simultaneously selecting a learning algorithm and setting its hyperparameters, going beyond previous methods that address these issues in isolation. Auto-WEKA does this using a fully automated approach, leveraging recent innovations in Bayesian optimization.

24) What is AutoML platform?

Automated Machine Learning (AutoML) software, also known as AutoML services/tools, enables data scientists and machine learning engineers as well as non-technical users, to automatically build scalable machine learning models. … Finally, models with the best performance are shared with the end-user.

25) What is Vertex AI?

Vertex AI Workbench is the single environment for data scientists to complete all of their ML work, from experimentation, to deployment, to managing and monitoring models. It is a Jupyter-based fully managed, scalable, enterprise-ready compute infrastructure with security controls and user management capabilities.

26) How is AutoML implemented?

AutoML Vision API Tutorial

Step 1: Create the Flowers dataset.

Step 2: Import images into the dataset.

Step 3: Create (train) the model.

Step 4: Evaluate the model.

Step 5: Use a model to make a prediction.

Step 6: Delete the model.

27) How do you automate ML?

Ways to use AutoML in Azure Machine Learning

Experiment settings. The following settings allow you to configure your automated ML experiment.

Model settings. …

Run control settings. …

Classification. …

Regression. …

Time-series forecasting. …

Computer vision (preview) …

Choose compute target.

28) What is hyper opt?

What is Hyperopt. Hyperopt is a powerful python library for hyperparameter optimization developed by James Bergstra. Hyperopt uses a form of Bayesian optimization for parameter tuning that allows you to get the best parameters for a given model. It can optimize a model with hundreds of parameters on a large scale.

29) What is Hyperas?

A very simple convenience wrapper around hyperopt for fast prototyping with keras models. Hyperas lets you use the power of hyperopt without having to learn the syntax of it. Instead, just define your keras model as you are used to, but use a simple template notation to define hyper-parameter ranges to tune.

30) What algorithm does Optuna use?

Optuna implements sampling algorithms such as Tree-Structured of Parzen Estimator (TPE) [7, 8] for independent parameter sampling as well as Gaussian Processes (GP) [8] and Covariance Matrix Adaptation (CMA) [9] for relational parameter sampling which aims to exploit the correlation between parameters.

31) What is difference between DL and ML?

Machine Learning (ML) is commonly used along with AI but it is a subset of AI. ML refers to an AI system that can self-learn based on the algorithm. … Deep Learning (DL) is a machine learning (ML) applied to large data sets. Most AI work involves ML because intelligent behaviour requires considerable knowledge.

32) Does gradient boosting use bootstrapping?

Boosting also requires bootstrapping. However, there is another difference here. Unlike in bagging, boosting weights each sample of data.

33) Why is underfitting called bias?

Overfitting, Underfitting in Regression

The model is rigid and not at all flexible. Due to the low flexibility of a linear equation, it is not able to predict the samples (training data), therefore the error rate is high and it has a High Bias which in turn means it’s underfitting.

34) What is bias ML?

Bias is considered a systematic error that occurs in the machine learning model itself due to incorrect assumptions in the ML process. … A model with a higher bias would not match the data set closely. A low bias model will closely match the training data set.

35) Is h20 open source?

H2O is a fully open source, distributed in-memory machine learning platform with linear scalability. … The H2O platform is used by over 18,000 organizations globally and is extremely popular in both the R & Python communities.

36) How do I connect H2O to R?

More information on H2O’s system and algorithms (as well as R user documentation) is available at the H2O website at R uses a REST API to connect to H2O. To use H2O in R or launch H2O from R, specify the IP address and port number of the H2O instance in the R environment.

37) Can CatBoost be used for regression?

The CatBoost library can be used to solve both classification and regression challenge. For classification, you can use “CatBoostClassifier” and for regression, “CatBoostRegressor“.

38) What is cat features in CatBoost?

CatBoost supports numerical, categorical and text features. Categorical features are used to build new numeric features based on categorical features and their combinations. See the Transforming categorical features to numerical features section for details.

39) What algorithm does Google AutoML use?

machine learning algorithm
AutoML automatically locates and uses the optimal type of machine learning algorithm for a given task. It does this with two concepts: Neural architecture search, which automates the design of neural networks.

40) What is TPOT Python?

Tree-based Pipeline Optimization Tool, or TPOT for short, is a Python library for automated machine learning. TPOT uses a tree-based structure to represent a model pipeline for a predictive modeling problem, including data preparation and modeling algorithms and model hyperparameters.

41) What is AutoML in Python?

AutoML are techniques for automatically and quickly discovering a well-performing machine learning model pipeline for a predictive modeling task. … The three most popular AutoML libraries for Scikit-Learn are Hyperopt-Sklearn, Auto-Sklearn, and TPOT.

42) What is cloud ML?

The Google Cloud ML Engine is a hosted platform to run machine learning training jobs and predictions at scale. … The service can also be used to deploy a model that is trained in external environments. Cloud ML Engine automates all resource provisioning and monitoring for running the jobs.

43) Can data scientist replace AutoML?

When taking on these responsibilities, data scientists can use automation options for some parts of a machine learning process. But, AutoML cannot fully replace these responsibilities of a data scientist.

44) Who invented AutoML?

Quoc Le
Behind AutoML is its engine called Neural Architecture Search, invented by Quoc Le, a pioneer in the AI Field. Quoc Le co-founded Google Brain in 2011, together with Andrew Ng and Jeff Dean. In 2012, Le published the famous “cat” paper that recognized cats based on 10 million images.

45) What is GCP looker?

Looker is an enterprise platform for business intelligence, data applications, and embedded analytics. Looker helps you explore, share, and visualize your company’s data so that you can make better business decisions.

46) What is a feature store?

A feature store is a tool for storing commonly used features. When data scientists develop features for a machine learning model, those features can be added to the feature store. … A full-fledged feature store: Transforms raw data into feature values by executing data pipelines. Stores and manages feature values.

47) What is anthos GCP?

Anthos is a modern application management platform that provides a consistent development and operations experience for cloud and on-premises environments. … The following table shows the components currently available for use on Google Cloud, on AWS, on attached Kubernetes clusters, or on-premises.

48) Does Optuna use Bayesian optimization?

Optuna is a software framework for automating the optimization process of these hyperparameters. It automatically searches for and finds optimal hyperparameter values by trial and error for excellent performance. … Specifically, it employs a Bayesian optimization algorithm called Tree-structured Parzen Estimator.

49) How can I speed up my Optuna?

You can optimize MXNet hyperparameters, such as the number of layers and the number of hidden nodes in each layer, in three steps:

Wrap model training with an objective function and return accuracy.

Suggest hyperparameters using a trial object.

Create a study object and execute the optimization.

50) What is meant by Turing Test?

The Turing Test is a deceptively simple method of determining whether a machine can demonstrate human intelligence: If a machine can engage in a conversation with a human without being detected as a machine, it has demonstrated human intelligence.

Rajesh Kumar
Follow me
Latest posts by Rajesh Kumar (see all)
Notify of
Inline Feedbacks
View all comments
Would love your thoughts, please comment.x