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Dataiku Interview Questions and Answers
Ques:- What is a web service and how does it relate to an API
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.
Ques:- What are Webhooks and how do they differ from APIs
Right Answer:
Webhooks are user-defined HTTP callbacks that are triggered by specific events in a web application, allowing real-time data transfer. They differ from APIs in that APIs require a request to be made to receive data, while webhooks automatically send data when an event occurs without needing a request.
Ques:- What is API documentation and why is it necessary
Right Answer:
API documentation is a technical manual that explains how to use an API, including its endpoints, request and response formats, authentication methods, and examples. It is necessary because it helps developers understand how to integrate and interact with the API effectively, ensuring proper usage and reducing errors.
Ques:- What is API testing and what tools can be used for it
Right Answer:
API testing is the process of verifying that an application programming interface (API) functions as expected, ensuring it meets the requirements for functionality, reliability, performance, and security. Tools that can be used for API testing include Postman, SoapUI, JMeter, RestAssured, and Swagger.
Ques:- What is the role of an API Gateway in microservices architecture
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.
Ques:- What are the Steps involved in Project implementation?
Right Answer:
1. Project Planning
2. Resource Allocation
3. Team Formation
4. Task Assignment
5. Execution
6. Monitoring and Controlling
7. Quality Assurance
8. Communication
9. Stakeholder Engagement
10. Project Closure
Ques:- What is the difference between development length & overlap length ?
Right Answer:
Development length is the length of rebar required to be embedded in concrete to develop its full strength, while overlap length is the length of rebar that is overlapped and tied together to ensure continuity in reinforcement when two bars are joined.
Ques:- ROLE & RESPONSIBILITY AT SAUDI KAYAN PROJECT.
Right Answer:
As a project manager at the Saudi Kayan project, my role and responsibilities included overseeing project planning, coordinating with stakeholders, managing resources, ensuring compliance with safety and quality standards, monitoring project progress, and delivering the project on time and within budget.
Ques:- For a small to medium company, they want to go online. Define the complete architecture for them?
Right Answer:
1. **Domain Name**: Register a domain name that reflects the company's brand.

2. **Web Hosting**: Choose a reliable web hosting service (shared, VPS, or dedicated) based on budget and expected traffic.

3. **Website Development**:
- **Content Management System (CMS)**: Use a CMS like WordPress, Shopify, or Joomla for easy content updates.
- **Design**: Create a responsive design that works on both desktop and mobile devices.

4. **E-commerce Functionality** (if applicable): Integrate e-commerce features for product listings, shopping cart, and payment processing.

5. **Database**: Set up a database (e.g., MySQL) to store user data, product information, and transaction records.

6. **Security**: Implement SSL certificates for secure data transmission and ensure regular security updates.

7. **SEO Optimization**: Optimize the website for search engines to improve visibility.

8. **Analytics**: Integrate tools like
Ques:- How do you handle scope creep or changes during a sprint
Right Answer:
During a sprint, I generally avoid scope creep. If a change request is small and doesn't impact the sprint goal, the team can discuss and decide if it can be included. If the change is significant, it goes into the product backlog to be prioritized for a future sprint.
Ques:- How do you facilitate and ensure effective sprint retrospectives
Right Answer:
To facilitate effective sprint retrospectives, I would:

1. **Set the Stage:** Create a safe and open environment where the team feels comfortable sharing.
2. **Gather Data:** Collect information about what went well, what didn't, and any challenges faced during the sprint.
3. **Generate Insights:** Facilitate a discussion to identify root causes and patterns.
4. **Decide on Actions:** Collaborate to define specific, actionable, measurable, achievable, relevant, and time-bound (SMART) improvements.
5. **Close the Retrospective:** Summarize action items and assign owners.
6. **Follow Up:** Track progress on action items in subsequent sprints to ensure continuous improvement.
Ques:- Can you describe what a sprint backlog is and how it is created
Right Answer:
A sprint backlog is a detailed plan of work for a specific sprint, derived from the product backlog. It's created during sprint planning by the development team, who select items from the product backlog they commit to complete, then break down those items into tasks and estimate the effort required for each.
Ques:- What are the benefits and challenges of continuous delivery in an Agile environment
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.
Ques:- What is the difference between a user story, a task, and an epic in Agile
Right Answer:
* **Epic:** A large, high-level user story that is too big to complete in a single iteration. It's usually broken down into smaller user stories.
* **User Story:** A small, self-contained requirement that represents a valuable piece of functionality for the end-user. It follows the format: "As a [user type], I want [goal] so that [benefit]".
* **Task:** A small, actionable item that needs to be done to complete a user story. It's a technical breakdown of the work required by the development team.
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