Category Archives: Interview questions

Decision Tree Algorithm – Concepts, Interview Questions

Decision tree is one of the most commonly used machine learning algorithms which can be used for solving both classification and regression problems. It is very simple to understand and use. Here is a lighter one representing how decision trees and related algorithms (random forest etc) are agile enough for usage.   In this post, you will learn about some of the following in relation to machine learning algorithm – decision trees vis-a-vis one of the popular C5.0 algorithm used to build a decision tree for classification. In another post, we shall also be looking at CART methodology for building a decision tree model for classification. Key terminologies/definitions Key concepts Python …

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Kubernetes – Practice Test / Interview Q&A on Service Discovery

kubernetes service discovery

This article represents concepts, revision / quick notes, and practice or sample test/interview questions and answers on Service Discovery topic of Kubernetes. These notes, Q&A could provide to be helpful for those appearing for Kubernetes administrator certification exams (CKA). Revision Notes – Service Discovery Kubernetes supports the following two modes of service discovery: Environment variable DNS Service environment details can be set based on the following format. Service name needs to be in uppercase. {SVCNAME}_SERVICE_HOST {SVCNAME}_SERVICE_PORT When using environment variables for service discovery, it is a mandate that the services must be created prior to the pods which want to access those services. DNS server creates a set of records for each service discovered via watching Kubernetes APIs. Services of type ExternalName can only be accessed …

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Hyperledger Fabric Transaction Flow (Interview Q&A & Notes)

hyperledger fabric transaction flow

This article represents concepts in relation to, how does a transaction flow in Hyperledger Fabric Blockchain network, in form of notes and interview questions and answers. Those appearing for Hyperledger Fabric interview would find the questions and notes very useful for quick brush-up. Hyperledger Fabric is a platform for distributed ledger solutions. The following represents key participants in Hyperledger Fabric Blockchain network who are involved in the transaction flow right from the initiation of transaction proposal to committing a transaction into the distributed ledger. Application: Gets involved in following capacity: Sends the transaction proposal to endorsing peers Receives the transaction results from endorsing peers Broadcasts the transaction message to ordering service Endorsing peers: Do some of the …

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Hyperledger Fabric Distributed Ledger – Interview Questions / Notes

hyperledger fabric distributed ledger interview questions

This article represents practice test / interview questions and answers and revision notes on Hyperledger Fabric Distributed Ledger**. These questions and answers can prove to be very helpful to check your knowledge on Hyperledger Fabric if you are appearing for Hyperledger Fabric interview in near future. Hyperledger Fabric is an open-source framework for building distributed ledger solutions. The distributed ledger is maintained by every peer participating in the network. It is stored as a combination of a transaction logs and a world state database (key-value pairs). Revision Notes – Hyperledger Fabric Distributed Ledger Concepts The distributed ledger is a combination of following: Blockchain to store immutable ordered/sequenced records; It is stored in form of transaction logs and stored in peers’ file system (local …

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Hyperledger Fabric Introduction – Interview Questions / Revision Notes

hyperledger fabric introduction

This article represents practice test and revision notes on Introduction to Hyperledger Fabric. These questions and answers can prove to be very helpful to check your knowledge of Hyperledger Fabric if you are appearing for Hyperledger Fabric interview in near future. Hyperledger Fabric is an open-source framework for building distributed ledger solutions. The unique thing about Hyperledger Fabric is that it supports pluggable implementations of different components such as identity management, consensus algorithm etc. Revision notes on Introduction to Hyperledger Fabric Hyperledger Fabric can be used for creating private and permissionless Blockchain network. Blockchain Participants – Membership Members join Hyperledger Fabric Blockchain network using Membership Service Provider (MSP) service. Hyperledger Fabric allows custom MSP to be plugged. Distributed Ledger – Data and Database Hyperledger Fabric allows ledger data to be stored …

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Certified Kubernetes Administrator Sample Test on Services Concept

Certified Kubernetes Administrator Practice Test on Services

This page represents practice test consisting of questions and answers on Kubernetes. This practice test covers the topic such as Kubernetes Services. The practice test can prove to be very helpful if you are preparing to take Certified Kubernetes Administrator (CKA) certification examination in near future. It covers the Networking Concepts from CKA certification exam syllabus which can comprise of 11% questions in CKA certification exam. Check out other question sets on this page, Kubernetes Certification Exam (CKA) Sample Questions Sets. Revision Notes – Kubernetes concepts on Services A Kubernetes service is an abstraction which is used to define a logical set of pods. A Kubernetes service is assigned an IP address. In service spec definition, port refers to incoming port which is mapped to targetPort on Pod. By default, the value of …

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Kubernetes Interview Questions and Answers – Set 4

Kubernetes Interview Questions and Answers

This page represents practice test consisting of objective questions and answers on Kubernetes. This practice test covers the topic such as Pod Lifecycle. The practice test can prove to be very helpful if you are preparing to take Certified Kubernetes Administrator (CKA) certification examination in near future. It covers the Core Concepts from CKA certification exam syllabus. Those preparing for interviews in relation with Kubernetes or cloud-native apps would also find these questions to be useful enough. These questions can as well prove to be useful for interns / freshers / beginners. Revision Notes – Kubernetes Concepts (Pod Lifecycle) A Pod status field is a PodStatus object which has got phase field. The phase of the pod is a simple, high-level summary of where the Pod is in its lifecycle Kubelet invokes …

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Quantum Computing Interview Questions and Answers – Set 1

Quantum Computing Interview Questions

This is the first in series of practice tests / interview questions and answers in relation to Quantum computing. It touches upon the basic concepts in relation to some of the following: Qubit Difference between a bit and Qubit Superposition of Qubit states Quantum entanglement This practice test will prove to be useful for Quantum Computing beginners / interns / freshers.  Revision Notes – Quantum Computing Fundamentals Quantum computing is different than classical computing. Problems which are suited for quantum computing should be considered for Quantum computing. A Qubit is a two-state quantum mechanical system; A Qubit can be in superposition of both the states at the same time. A Qubit is similar to bit …

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Hyperledger Interview Questions and Answers – Set 1

Hyperledger Interview Questions

This is the first in series of practice tests / interview questions and answers in relation to Hyperledger products suite for building distributed ledgers / Blockchain business networks. This test focuses on checking your knowledge on different products such as following under hyperledger umbrella. Fabric Sawtooth Iroha Indy Burrow Cello Composer Quilt Explorer Revision Notes – Hyperledger Tools & Frameworks Hyperledger Fabric supports pluggable consensus algorithm (ordering service) and membership service provider Hyperledger Indy can be used to build distributed ledger (Blockchain) related with decentralized digital identities Hyperledger Burrow is used for creating a permissioned Ethereum smart-contract blockchain node that executes smart contract code following the Ethereum specification. Hyperledger Explorer can be used to view, invoke, deploy or query blocks, transactions and associated data, network …

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Kubernetes Interview Questions and Answers – Set 3

kubernetes interview questions and answers

This page represents practice test consisting of objective questions and answers on Kubernetes.  The following topics are covered as part of this practice test / quiz: Container hooks and related lifecycle Pods The practice test can prove to be very helpful if you are preparing to take Certified Kubernetes Administrator (CKA) certification examination in near future. It covers the Core Concepts from CKA certification exam syllabus. Those preparing for interviews in relation with Kubernetes or cloud-native apps would find these questions to be useful enough. These questions can prove to be useful for interns / freshers / beginners. Revision Notes – Kubernetes Concepts (Container Hooks / Pods) Kubernetes provides containers with following lifecycle hooks: PostStart PreStop Kubernetes supports implementation …

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Spring Framework Interview Questions & Answers – Set 1

Spring framework interview questions and answers

This is a practice test / interview questions and answers for Java Developers working on Spring Framework. These questions can be used to check your knowledge on Spring framework fundamentals. They could be useful and helpful in preparing you for upcoming interview in relation with Spring framework. The following are some of the topics in relation with Spring Framework Fundamentals which are covered in this practice test: Spring IOC concepts Configuration metadata Beans packages for IOC container Beans instantiation Different types of DI techniques (Constructor-based, Setter-based DI) Beans initialization (Eager / lazy initialization) Method injection techniques (lookup method, arbitrary method injection) Bean Scopes (Singleton, Prototype, Request, Session, Application, WebSocket) Practice Test on Spring Framework Fundamentals

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Kubernetes – Interview Questions and Answers on Pods

Kubernetes Namespaces Cheatsheet

This page represents practice test consisting of objective questions and answers on Kubernetes.  The practice test can prove to be very helpful if you are preparing to take Certified Kubernetes Administrator (CKA) certification examination in near future. It covers the Core Concepts from CKA certification exam syllabus. Those preparing for interviews in relation with Kubernetes or cloud-native apps would find these questions to be useful enough. These questions can prove to be useful for interns / freshers / beginners. These questions are related with some of the following topics: Kubernetes Pods New feature release in Kubernetes 1.8 such as taints and tolerations The following is link to other practice tests: Practice test on introduction to Kubernetes Practice …

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Neural Networks Interview Questions – Set 2

Neural network interview questions

This quiz represents practice test on artificial neural networks. These questions and answers can be as well used for your upcoming interviews for the position of machine learning engineer or data scientist. These questions can prove to be very useful for testing your neural networks knowledge from time-to-time. Also, these will be useful for interns / freshers / beginners of machine learning / data science. The topics covered in this practice test are following: Introduction to different types of neural networks such as Radial Basis Network, Recurrent neural network etc. Difference between multilayer perceptron (MLP) and Radial basis function network Practice Test on Neural Networks

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Top 10 Tricky Interview Questions for Java Developers

Java interview questions

Here is a list of top ten (10) tricky / popular interview questions and answers for Java developers. I got these questions out from Stackoverflow. You are a Junior or Intermidiate level Java developer and planning to appear for Java developer interviews in near future, you would find these questions to be useful enough. Q1: Is Java “pass-by-reference” or “pass-by-value”? Ans: Java is always “pass by value”. Read the details on this page, Is Java “pass-by-reference” or “pass-by-value”? Q2: How to create a memory leak in Java? Ans: This is possible by making use of Class loader and ThreadLocal. Read the details on this page, Creating a memory leak in Java Q3: What is difference between package private, public, protected, and private? Ans: A private member …

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K-Means Clustering Interview Questions – Set 1

kmeans clustering interview questions

This is a practice test on K-Means Clustering algorithm which is one of the most widely used clustering algorithm used to solve problems related with unsupervised learning. This can prove to be helpful and useful for machine learning interns / freshers / beginners planning to appear in upcoming machine learning interviews. This practice tests consists of interview questions and answers in relation with following: Introduction to K-Means Clustering Cost function Practice Test on K-Means Clustering

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Neural Networks Interview Questions – Set 1

neural networks interview questions

This page represents practice test consisting of objective questions on neural networks. This test can prove to be useful for interviews as well. These questions can prove to be useful for machine learning interns / freshers / beginners. These questions are related with some of the following topics: Introduction to neural networks Perceptron / Sigmoid neuron Types of neural networks Cost function for neural networks Practice Test on Neural Networks

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