Unico Connect Interview Questions, Process, and Tips

Q1. Difference between product and project management.
Ans. 
Product management focuses on the development and strategy of a product, while project management focuses on the planning and execution of a specific project.
• Product management is a long-term role, while project management is a short-term role.

• Product management involves market research, product development, and product strategy, while project management involves planning, execution, and delivery of a specific project.

• ...read more
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Q2. What is the issue flow and workflow in Jira
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Issue flow and workflow in Jira refer to the process of creating, tracking, and resolving issues within a project.
• Issue flow refers to the lifecycle of an issue, from creation to resolution

• Workflow refers to the specific steps and statuses an issue goes through in order to be resolved

• Jira allows for customization of workflows to fit the needs of a specific project or team

• Examples of workflow steps include 'To Do', 'In
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Q3. Types of frontend technologies
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Frontend technologies include HTML, CSS, and JavaScript.
• HTML is used for creating the structure of a webpage

• CSS is used for styling the webpage

• JavaScript is used for adding interactivity to the webpage

• Other popular frontend technologies include React, Angular, and Vue.js
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Q1. Tell me About Yourself, Tech Stack, Salary expectations, location.
Ans. 
I am a backend developer with expertise in Java, Spring Boot, and MySQL. I am looking for a competitive salary in a location with a strong tech community.
• Experienced in Java, Spring Boot, and MySQL

• Seeking competitive salary

• Prefer location with strong tech community
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Q1. Tell me about yourself ?
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Q2. What are the key consideration when designing a database in Mongodb ?
Ans. 
Key considerations include data modeling, indexing, sharding, and replication.
• Consider the data model carefully to ensure it fits the application's needs.

• Use indexing to improve query performance.

• Plan for sharding to distribute data across multiple servers for scalability.

• Implement replication for high availability and fault tolerance.
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Q3. How does over-indexing affect MongoDB performance, and how can it be prevented ?
Ans. 
Over-indexing in MongoDB can negatively impact performance by increasing memory usage and slowing down query execution.
• Over-indexing can lead to increased memory usage as each index consumes memory.

• Having too many indexes can slow down write operations as each index needs to be updated when a document is inserted, updated, or deleted.

• To prevent over-indexing, carefully analyze query patterns and create indexes only for...read more
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Q4. Given a collection of user details, write mongo query to increase the age by 20% for documents where age exists.
Ans. 
Mongo query to increase age by 20% for documents with age field
• Use $exists operator to filter documents with age field

• Use $mul operator to increase age by 20%

• Example: db.users.updateMany({ age: { $exists: true } }, { $mul: { age: 1.2 } })
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Q5. What are the different authentication methods used in applications ?
Ans. 
Different authentication methods include OAuth, JWT, Basic Auth, and OAuth2.
• OAuth: Allows third-party applications to access resources without sharing credentials.

• JWT (JSON Web Tokens): Securely transmit information between parties as a JSON object.

• Basic Auth: Sends user credentials in the header of each request.

• OAuth2: Authorization framework that enables a third-party application to obtain limited access to an HTTP s
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Q6. Explain the key parameters in JWT(JSON Web Token).
Ans. 
JWT key parameters include header, payload, signature, and expiration time.
• Header: Contains metadata about the token such as the type and hashing algorithm.

• Payload: Contains claims or information about the user.

• Signature: Used to verify that the sender of the JWT is who it says it is and to ensure that the message wasn't changed along the way.

• Expiration Time: Specifies the time after which the JWT expires and should no
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Q7. What is your approach for Heavy Data Handling ?
Ans. 
My approach for Heavy Data Handling involves optimizing database queries, using indexing, caching, and implementing efficient algorithms.
• Optimizing database queries by using proper indexing and avoiding unnecessary joins

• Implementing caching mechanisms to reduce the load on the database

• Using efficient algorithms for data processing and manipulation

• Batch processing large datasets to minimize resource usage

• Implementing da...read more
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Q8. What are the major difference between Promises and Callbacks in Javascript ?
Ans. 
Promises are objects representing the eventual completion or failure of an asynchronous operation, while callbacks are functions passed as arguments to be executed after a task is completed.
• Promises allow chaining multiple asynchronous operations, while callbacks can lead to callback hell.

• Promises have built-in error handling through .catch(), while callbacks rely on error-first callbacks.

• Promises are easier to read an...read more
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Q9. Can you briefly explain the request-response cycle in node.js ?
Ans. 
The request-response cycle in node.js involves a client sending a request to a server, which processes the request and sends back a response.
• Client sends a request to the server using HTTP methods like GET, POST, PUT, DELETE.

• Server receives the request, processes it, and generates a response.

• The response is sent back to the client, typically in the form of HTML, JSON, or other data formats.

• Node.js uses event-driven, no...read more
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Q10. In Redis, how would you retrieve all keys that contain the substring "xyz" ?
Ans. 
Use the KEYS command in Redis to retrieve all keys containing a specific substring.
• Use the KEYS command followed by the pattern '*xyz*' to retrieve all keys containing the substring 'xyz'.

• Be cautious when using the KEYS command as it can be resource-intensive on large datasets.

• Consider using SCAN command for better performance when dealing with large datasets.
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Q11. What is your perception of no-code tools(XANO), and have you used any ?
Ans. 
I believe no-code tools like XANO are great for rapid prototyping and simplifying development processes.
• No-code tools like XANO allow for faster development by eliminating the need for manual coding

• They are great for prototyping and testing ideas quickly

• XANO specifically offers a visual interface for building backend logic without writing code

• I have used XANO in a few projects and found it to be user-friendly and effic
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Q1. Tell me about yourself
Ans. 
I am a backend developer with 5 years of experience in building scalable and efficient web applications.
• 5 years of experience in backend development

• Proficient in languages like Java, Python, and Node.js

• Strong understanding of database management systems such as MySQL and MongoDB

• Experience in building RESTful APIs and microservices

• Familiar with cloud technologies like AWS and Azure
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Q2. Can you discuss some recent projects you have worked on and your role in them ?
Ans. 
I have worked on developing a real-time chat application and a data visualization tool for analyzing user behavior.
• Developed a real-time chat application using Node.js, Socket.io, and MongoDB.

• Created a data visualization tool using D3.js to analyze user behavior on a website.

• Collaborated with front-end developers to integrate backend functionality with the user interface.

• Implemented RESTful APIs for communication betwe
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Q3. What are the key factors to consider when designing a database ?
Ans. 
Key factors include data modeling, normalization, indexing, scalability, and performance.
• Consider data modeling to ensure efficient storage and retrieval of data.

• Normalize the database to reduce redundancy and improve data integrity.

• Use indexing to speed up data retrieval operations.

• Design for scalability to accommodate future growth and changes.

• Optimize for performance by considering query optimization and data cachin
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Q4. Have you worked with any no-code tools, such as Xano ? If yes, describe your experience.
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Q5. What is current CTC and what are your salary expectation for this role ?
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Basic coding question

Q1. Introduction and previous experience.
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Q2. Discussion about previous experience
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Q1. Js questions and react js
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Q1. How to key values from object
Ans. 
Use object[key] syntax to access values from an object
• Access value using object[key] syntax

• Key can be a string or a variable containing a string

• Example: let obj = { key: 'value' }; console.log(obj['key']);
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