85 Techouts Interview Questions and Answers | HR, Technical & Aptitude Prep

20 common asked question in every interview

React js

Ques:- Can we create one list without using ‘key’ in react?

Asked In :- Aliens Group, RORO, Klick Health, Payoda, Intelizign, Cynet Systems, TSS Consultancy, Cron-J, Quick Release, Fastlab,

Right Answer:
No, you cannot create a list in React without using a unique 'key' for each list item.

Comments

Admin Feb 3, 2020

We can create one list without ‘key’ for each element but it will cause issues with the react component rendering the list. Even on the browser console, it will throw one error.

React js

Ques:- Why is a component constructor called only once?

Asked In :- POPCORNAPPS SOFTWARE PVT, Rheal Software, Ranosys Technologies, TSS Consultancy, CloudThat, De Shaw, Snapsheet, aptean, greenway health, canonical ltd.,

Right Answer:
A component constructor is called only once because it is invoked when the component is first created and mounted to the DOM. Subsequent updates to the component do not recreate it; instead, React updates the existing instance, which is why the constructor is not called again.

Comments

Admin Feb 3, 2020

React’s appeasement algorithm assumes that without any information to the contrary, if a custom component appears in the same place on consequent renders, it’s the same component as before, so reuses the previous instance moderately than making a new one.

React js

Ques:- What is state and props and its difference?

Asked In :- BillDesk, Ribbon Communications Inc, Girmiti Software, Qualminds Technologies, Next Wave, WebMobril Technologies, MSys Technologies, Concerto Software, Softsuave, Fastlab,

Right Answer:
State is a built-in object in React that allows components to manage their own data and re-render when that data changes. Props (short for properties) are read-only attributes passed from a parent component to a child component to configure or customize it.

The main difference is that state is mutable and managed within the component, while props are immutable and passed down from parent to child.

Comments

Admin Feb 3, 2020

Both props and state are plain JavaScript objects. While both of them hold information that influences the output of render, they are different in their functionality with respect to component. Props get passed to the component similar to function parameters whereas state is managed within the component similar to variables declared within a function

React js

Ques:- What is React DOM Server?

Asked In :- Angular Minds, Isolve Technologies, ScriptsHub Technologies, EY GDS, LPG, Next Wave, Ranosys Technologies, Whatfix, Cron-J, MindBowser Info Solutions,

Right Answer:
React DOM Server is a package in React that allows you to render React components on the server side, generating HTML content that can be sent to the client. This helps improve performance and SEO by delivering fully rendered pages to the browser.

Comments

Admin Feb 3, 2020

The React DOM Server object enables us to render components to static markup . This object is mostly used for server-side rendering (SSR). The below methods can be used in both the server and browser environments:
renderToString()
renderToStaticMarkup()

React js

Ques:- What are React props?

Asked In :- Coviam Technologies, Smart Cube India, RORO, Talentica, Statestreet HCL Services, Cradlepoint, Reliance Jio, ncs group, torry harris business solutions, prolifics,

Right Answer:
React props are short for "properties" and are used to pass data from a parent component to a child component in React. They allow components to be dynamic and reusable by providing them with different values.

Comments

Admin Feb 3, 2020

props are used to pass data to a component. They can hold single or multiple sets of values to pass to a component. They are mainly used to pass data to a component and to trigger any state changes.

Agile

Ques:- What are the benefits and challenges of continuous delivery in an Agile environment

Asked In :- KRIOS Info Solutions, Rock Solid Solutions, Shipco IT, Ziffity Solutions, Trigent Software, STIC SOFT E-SOLUTIONS, Namecheap Web Services, MatchMove India, Cloud Kinetics Technology Solutions, Sun Technology Integrators,

Right Answer:
**Benefits:** Faster time to market, reduced risk, improved quality, faster feedback, happier teams.

**Challenges:** Requires high automation, strong collaboration, cultural shift, investment in infrastructure, and robust testing.

Agile

Ques:- What are Agile ceremonies (like sprint planning, daily stand-ups, sprint reviews, retrospectives), and how do they work

Asked In :- DREAMORBIT SOFTECH PVT, Object Frontier Software, Hidden Brains InfoTech, Rock Solid Solutions, Shipco IT, Itobuz Technologies, Solace Infotech, Born Commerce, Spadeworx Software Services, TNQ Technologies,

Right Answer:
Agile ceremonies are recurring meetings within a sprint to facilitate communication, planning, and continuous improvement.

* **Sprint Planning:** The team decides what work to complete in the upcoming sprint. They discuss user stories, estimate effort, and define the sprint goal.

* **Daily Stand-up:** A brief daily meeting where the team shares progress, identifies roadblocks, and coordinates efforts. Each member typically answers: What did I do yesterday? What will I do today? Are there any impediments?

* **Sprint Review:** The team demonstrates the completed work to stakeholders, gathering feedback and ensuring alignment with expectations.

* **Sprint Retrospective:** The team reflects on the past sprint, identifying what went well, what could be improved, and defining action items to enhance future performance.

Agile

Ques:- How do you ensure that Agile teams maintain focus and productivity during iterations

Asked In :- Winsoft Technologies India Pvt. Ltd, Xoriant Solutions Pvt Ltd, AnAr Solutions, Netaxis IT Solutions (p), Addweb solutions, Fortunesoft IT Innovations, Codiant Software Technologies, Oodles Technologies, ISKPRO, Sun Technology Integrators,

Right Answer:
* **Clear Sprint Goals:** Define specific, measurable, achievable, relevant, and time-bound (SMART) goals for each iteration.
* **Daily Stand-ups:** Facilitate short, focused daily meetings to identify roadblocks and coordinate efforts.
* **Sprint Backlog Management:** Keep the sprint backlog refined, prioritized, and realistic based on team capacity.
* **Timeboxing:** Adhere to time limits for meetings and tasks to prevent scope creep and maintain momentum.
* **Focus on Value:** Prioritize tasks that deliver the most business value within the iteration.
* **Remove Impediments:** Proactively identify and resolve obstacles that hinder the team's progress.
* **Limit Work in Progress (WIP):** Encourage the team to focus on completing tasks before starting new ones.
* **Continuous Feedback:** Regularly review progress, gather feedback, and adapt plans as needed.
* **Defined "Definition of Done":** Ensure a clear understanding of what it means for a task to be considered complete.
* **Team Collaboration & Communication:** Foster open and effective communication and collaboration within the team.

Agile

Ques:- How do you prioritize features or tasks in an Agile sprint

Asked In :- Vinove Software & Services Pvt Ltd, KRIOS Info Solutions, Bold Technology Systems, AnAr Solutions, Queppelin Technology Solutions, Rock Solid Solutions, Aakit Technologies, Indocosmo Systems, Codiant Software Technologies, iROID Technologies,

Right Answer:
We prioritize features or tasks in an Agile sprint using a combination of factors like business value, risk, effort/size, dependencies, and urgency. Product Owner usually leads this, using techniques like MoSCoW (Must have, Should have, Could have, Won't have) or story pointing, to ensure the most valuable items are tackled first.

Agile

Ques:- What is Agile methodology, and how does it differ from traditional project management approaches

Asked In :- Xoriant Solutions Pvt Ltd, Bold Technology Systems, AnAr Solutions, Rock Solid Solutions, Walkover Web Solutions, Toxsl Technologies, Itobuz Technologies, Addweb solutions, Indocosmo Systems, Fortunesoft IT Innovations,

Right Answer:
Agile is an iterative and incremental approach to project management that focuses on collaboration, flexibility, and customer satisfaction. Unlike traditional, sequential (waterfall) methods, Agile embraces change throughout the project lifecycle through short development cycles called sprints.

API

Ques:- What is API authentication and what are common methods

Asked In :- Vinove Software & Services Pvt Ltd, Winsoft Technologies India Pvt. Ltd, DREAMORBIT SOFTECH PVT, Hidden Brains InfoTech, Netaxis IT Solutions (p), Queppelin Technology Solutions, Rock Solid Solutions, Shipco IT, Walkover Web Solutions, iROID Technologies,

Right Answer:
API authentication is the process of verifying the identity of a user or application trying to access an API. Common methods include:

1. **API Keys**: Unique keys provided to users to access the API.
2. **Basic Authentication**: Uses a username and password encoded in Base64.
3. **OAuth**: A token-based authentication method that allows users to grant limited access to their resources without sharing credentials.
4. **JWT (JSON Web Tokens)**: A compact, URL-safe means of representing claims to be transferred between two parties, often used for stateless authentication.
5. **HMAC (Hash-based Message Authentication Code)**: Uses a secret key to create a hash of the request, ensuring data integrity and authenticity.

API

Ques:- What is a web service and how does it relate to an API

Asked In :- Winsoft Technologies India Pvt. Ltd, Queppelin Technology Solutions, Rock Solid Solutions, STIC SOFT E-SOLUTIONS, LiteBreeze Infotech, Define Labs, QuickXpert Infotech, Tredence Analytics Solutions, Noesys Consulting, infobell IT solutions,

Right Answer:
A web service is a standardized way of allowing different applications to communicate over the internet using protocols like HTTP. It provides a method for applications to exchange data and perform operations. An API (Application Programming Interface) is a set of rules and tools that allows different software applications to interact with each other. A web service is a type of API that specifically uses web protocols to enable this interaction.

API

Ques:- What are RESTful principles and how do they apply to API design

Asked In :- STIC SOFT E-SOLUTIONS, Addweb solutions, Dhruvsoft Services, Elite Software Solutions, QUALYS SECURITY TECHSERVICES, Tredence Analytics Solutions, Spark Infosys, Noesys Consulting, Deligence Technologies, Technostacks Infotech,

Right Answer:
RESTful principles include:

1. **Statelessness**: Each API call must contain all the information needed to understand and process the request, with no stored context on the server.
2. **Client-Server Architecture**: The client and server are separate, allowing for independent development and scalability.
3. **Uniform Interface**: A consistent way to interact with resources, typically using standard HTTP methods (GET, POST, PUT, DELETE).
4. **Resource-Based**: APIs should expose resources (data entities) through URIs, and clients interact with these resources.
5. **Representation**: Resources can be represented in various formats (like JSON or XML), and clients can request the format they prefer.
6. **Cacheability**: Responses should indicate whether they can be cached to improve performance and reduce server load.

These principles guide the design of APIs to be scalable, efficient, and easy to use.

API

Ques:- What is the role of an API Gateway in microservices architecture

Asked In :- Xoriant Solutions Pvt Ltd, KRIOS Info Solutions, Netaxis IT Solutions (p), Walkover Web Solutions, Ziffity Solutions, STIC SOFT E-SOLUTIONS, TNQ Technologies, Oodles Technologies, TRICON INFOTECH PVT, Novalnet e-Solutions,

Right Answer:
An API Gateway acts as a single entry point for clients to access multiple microservices, handling requests, routing them to the appropriate services, managing authentication, rate limiting, and aggregating responses.

API

Ques:- What is OAuth and how does it work in API authentication

Asked In :- Xoriant Solutions Pvt Ltd, DREAMORBIT SOFTECH PVT, Netaxis IT Solutions (p), Queppelin Technology Solutions, Rock Solid Solutions, Toxsl Technologies, Itobuz Technologies, Define Labs, Oodles Technologies, Cyber Group India,

Right Answer:
OAuth is an open standard for access delegation commonly used for token-based authentication and authorization. It allows third-party applications to access a user's resources without sharing their credentials.

In API authentication, OAuth works by having the user authorize the application to access their data. The process involves:

1. The user is redirected to an authorization server to log in and grant permission.
2. The authorization server issues an access token to the application.
3. The application uses this access token to make API requests on behalf of the user.
4. The API validates the token and grants access to the requested resources.

communication

Ques:- What is half life period of a drug?

Asked In :- Unyscape Infocom Pvt. Ltd., Protege Solutions, ISKPRO, XIPHIAS Software Technologies, RLABS ENTERPRISE SERVICES PVT LIMITED, WBC SOFTWARE LAB, TeamLease Services, ProPhoenix Technologies, Columbus Global Services India, PRORIGO SOFTWARE PVT,

Right Answer:
The half-life period of a drug is the time it takes for the concentration of the drug in the bloodstream to reduce to half of its initial value.

communication

Ques:- If a customer wants to switch from airtel to vodaphone. How will you convince him to not to do that?

Asked In :- Media Agility, ProMobi Technologies, FYERS Securities, InfoObjects, Cervello India, Anand Rathi IT, Ryan India Tax Services, Talent Toppers, DMI Innovations, Feathersoft Info Solutions,

Right Answer:
I would highlight the benefits of staying with Airtel, such as superior network coverage, better customer service, exclusive offers, and loyalty rewards. I would also address any specific concerns they have and offer solutions to improve their experience with Airtel.

communication Networking

Ques:- What is cloud solution architecture?

Asked In :- DREAMORBIT SOFTECH PVT, Itobuz Technologies, KONE Elevator India, Razorpay-Startup, Evince Development, Newt Global India, Waffor, APPS Associates Pvt., Mindgate Solutions, Educe Solutions,

Right Answer:
Cloud solution architecture is the design and structure of cloud-based systems, including the components, services, and interactions needed to deliver applications and services over the internet. It involves selecting the right cloud services, defining how they integrate, and ensuring scalability, security, and performance.

Data Analytics

Ques:- What are outliers and how do you handle them in data analysis

Asked In :- Fluid AI, Trigent Software, Itobuz Technologies, RANDSTAD INDIA PVT, GOQii Technologies, Dhruvsoft Services, Radicle Software, Webvillee Technology, Fission Infotech, Noesys Consulting,

Right Answer:
Outliers are data points that significantly differ from the rest of the dataset. They can skew results and affect statistical analyses. To handle outliers, you can:

1. Identify them using methods like the IQR (Interquartile Range) or Z-scores.
2. Remove them if they are errors or irrelevant.
3. Transform them using techniques like log transformation.
4. Use robust statistical methods that are less affected by outliers.
5. Analyze them separately if they provide valuable insights.

Data Analytics

Ques:- What is clustering in data analysis and how is it different from classification

Asked In :- Medvarsity Online, AnAr Solutions, MattsenKumar Services, Protege Solutions, Shipco IT, Chegg India, Fortunesoft IT Innovations, GOQii Technologies, Spadeworx Software Services, Dhruvsoft Services,

Right Answer:
Clustering in data analysis is the process of grouping similar data points together based on their characteristics, without prior labels. It is an unsupervised learning technique. In contrast, classification involves assigning predefined labels to data points based on their features, using a supervised learning approach.

Techouts is a pioneering technology company at the forefront of innovation, specializing in providing cutting-edge solutions to businesses worldwide. With a mission to revolutionize industries through technology, Techouts offers a comprehensive suite of services tailored to meet the diverse needs of its clients. At the heart of Techouts' ethos lies a commitment to excellence, fueled by a team of passionate experts who are dedicated to pushing the boundaries of what is possible. Whether it's software development, artificial intelligence, cybersecurity, or cloud computing, Techouts leverages the latest advancements in technology to deliver customized solutions that drive business growth and efficiency. One of Techouts' key strengths is its ability to adapt and evolve in an ever-changing technological landscape. By staying ahead of the curve and continuously investing in research and development, Techouts ensures that its clients always have access to the most advanced and innovative solutions available. With a proven track record of success and a strong focus on customer satisfaction, Techouts has earned a reputation as a trusted partner for businesses looking to harness the power of technology to gain a competitive edge. Whether you're a startup looking to disrupt the market or a multinational corporation seeking to streamline operations, Techouts is your partner in success.

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