RFPIO Software Developer Interview Questions and Answers

Q1. Tree question with basic DFS solutions
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Q2. LIS DP question
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Q1. Let var const difference
Ans. 
var, let, and const are all used to declare variables in JavaScript, but they have different scopes and mutability.
• var is function-scoped and can be redeclared and reassigned

• let is block-scoped and can be reassigned but not redeclared

• const is block-scoped and cannot be reassigned or redeclared
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Q2. Polyfills of bind method
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Polyfills of bind method provide a way to use the bind method in older browsers that do not support it natively.
• Polyfill code typically checks if the bind method is available and if not, it creates a new function that mimics the behavior of bind.

• One common polyfill for the bind method is the following: Function.prototype.bind = Function.prototype.bind || function() { // polyfill code here };

• Polyfills are often used to ...read more
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Q1. Make a search bar in React
Ans. 
Create a search bar component in React for filtering data
• Create a functional component for the search bar

• Use state to store the search query

• Implement a onChange event handler to update the search query

• Filter the data based on the search query
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Q2. React js core concepts
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Q1. How you structure your work
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Q2. How you make a project from scratch
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There were 50 question out of which if you score 20 you were passed out to next round, No negative markings.

Q1. Exception handling, spring boot
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Q2. Oops concepts, java streams
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1hr
DSA
C++
Javascript
Hackerrank

Two DSA question on Appcoder platform

Q1. What is SAAS, IAAS?
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Q2. Difference between soap and rest services
Ans. 
SOAP is a protocol, REST is an architectural style for web services.
• SOAP is a protocol, while REST is an architectural style for web services

• SOAP uses XML for message format, REST can use various formats like JSON, XML, etc.

• SOAP is more rigid and has built-in security features, REST is more flexible and relies on underlying protocols for security

• SOAP has strict rules for communication, REST is more lightweight and simp...read more
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30 Questions Of Aptitude regarding Logical thinking etc

2 Coding Questions regarding Programming in C language

Q1. Questions based on projects worked and skills mentioned in resume
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Q1. Questions on Projects worked and skills mentioned and some company questions.
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Q1. Resume overview and work experience discussion
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Q2. Asked for expected salary
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Manager and employee problem. Given a table with id, Employee, managerId. Print the hierarchy in a tree format.

Q1. What are DNS,and Schemas ?
Ans. 
DNS stands for Domain Name System, used to translate domain names to IP addresses. Schemas define the structure of data.
• DNS is like a phone book for the internet, translating domain names to IP addresses

• Schemas define the structure of data in databases or programming languages

• DNS helps in resolving domain names like www.google.com to IP address like 172.217.7.238

• Schemas ensure data consistency and integrity by defining...read more
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Q2. Could you please explain the process of the request-response cycle?
Ans. 
The request-response cycle is the process of a client sending a request to a server, which then processes the request and sends back a response.
• Client sends a request to the server

• Server processes the request

• Server sends back a response to the client

• Communication typically happens over HTTP protocol

• Examples: When you type a URL in a browser, it sends a request to the server which then sends back the webpage
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Q3. What is a good programmer?
Ans. 
A good programmer is someone who is skilled in problem-solving, has strong technical knowledge, and is able to work well in a team.
• Strong problem-solving skills

• Solid technical knowledge

• Ability to work well in a team

• Continuous learning and improvement

• Good communication skills

• Attention to detail

• Creativity and innovation

• Adaptability to new technologies

• Efficient coding practices
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Q4. Why do we need DSA ?
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Q5. What is node js and why do we use the node on backend? can we create a frontend with the help of node js
Ans. 
Node.js is a runtime environment that allows you to run JavaScript on the server side. It is commonly used for building backend applications.
• Node.js is built on Chrome's V8 JavaScript engine and uses an event-driven, non-blocking I/O model, making it lightweight and efficient for handling multiple connections.

• It allows developers to use JavaScript for server-side scripting, enabling them to write both client-side and s...read more
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