Webskitters Interview Questions, Process, and Tips

Q1. How to fetch data from MongoDB
Ans. 
To fetch data from MongoDB, use the find() method with optional query parameters.
• Use the find() method to retrieve data from a MongoDB collection

• You can pass query parameters to filter the results

• Use the findOne() method to retrieve a single document
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Q2. How node is works
Ans. 
Node.js is a runtime environment that allows you to run JavaScript on the server side.
• Node.js uses an event-driven, non-blocking I/O model, making it lightweight and efficient.

• It is commonly used for building server-side applications, APIs, and real-time applications.

• Node.js is built on the V8 JavaScript engine and uses an event loop to handle asynchronous operations.
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Q3. What is middleware
Ans. 
Middleware is software that acts as a bridge between different applications or components, allowing them to communicate and work together.
• Middleware facilitates communication between different software components

• It can handle tasks such as data transformation, security, and routing

• Examples include message brokers like RabbitMQ, API gateways like Kong, and web servers like Apache Tomcat
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Q4. What is req and res
Ans. 
req and res are commonly used abbreviations for request and response objects in web development.
• req stands for request object, which contains information about the incoming HTTP request from the client.

• res stands for response object, which is used to send back a response to the client based on the request.

• In Node.js, req and res are often used in Express.js framework for handling HTTP requests and responses.
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Q5. How to upload file in server
Ans. 
To upload a file to a server, you can use a form with a file input field or use a server-side script to handle the file upload process.
• Create a form with a file input field in HTML.

• Use a server-side script (e.g. PHP, Node.js) to handle the file upload process.

• Validate the file type and size before uploading.

• Move the uploaded file to a designated folder on the server.

• Provide feedback to the user after the file has been
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Q6. All about RESTApis
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Q7. Why use mongoose for mongoDB
Ans. 
Mongoose provides a schema-based solution for modeling data in MongoDB, making it easier to work with complex data structures.
• Mongoose simplifies interactions with MongoDB by providing a schema-based solution

• It allows for defining data models with validation rules and relationships between data

• Mongoose also provides middleware functions for pre and post processing of data operations
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Q8. How to use soft delete
Ans. 
Soft delete is a technique used to mark records as deleted without actually removing them from the database.
• Add a 'deleted_at' column to the database table to store the timestamp of when the record was soft deleted

• Update queries to set the 'deleted_at' timestamp when a record is soft deleted

• Modify queries to exclude soft deleted records by checking for 'deleted_at' column being null
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Q9. Oops concept and some es6 related
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Q1. Salary negotiations
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Q1. Fundamental of React.js & JavaScript?
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Q2. Usememo / usecallbak
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Q1. All the questions were from angular and javascript
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Q2. One question was from coding
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Q1. Not a specific question .
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It depends

Q1. Your working experience
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Q1. Basic Of OPPS Related Questions
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Reverse a string of this array

Q1. Array related questions
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Q2. Single dimensional array
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Q3. Reverse string in this array
Ans. 
Reverse strings in an array
• Iterate through each string in the array

• Reverse each string using built-in functions or manual reversal

• Store the reversed strings back in the array
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