Digiqal Mern Full Stack Developer Interview Questions and Answers

Q1. Convert Roman to integer
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Q2. SQL queries optimisation & SQL engine
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Aptitude questions with some basic coding questions

They have given 3 coding questions and some pseudo codings

Q1. Tell about your self
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Q2. Some coding questions
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Q1. What are the key features of artificial intelligence?
Ans. 
Key features of artificial intelligence include learning, reasoning, problem-solving, perception, and language understanding.
• Learning: AI systems can learn from data, improving their performance over time. Example: Machine learning algorithms.

• Reasoning: AI can draw conclusions from available information. Example: Expert systems in diagnostics.

• Problem-solving: AI can find solutions to complex problems. Example: Optimiza...read more
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Q2. What are the steps involved in developing content?
Ans. 
Developing content involves planning, creating, reviewing, and publishing to ensure quality and relevance.
• 1. Research: Identify the target audience and gather relevant information. Example: Conduct surveys to understand user needs.

• 2. Planning: Outline the content structure and key messages. Example: Create a content calendar for blog posts.

• 3. Creation: Write, design, or produce the content. Example: Draft articles, cre...read more
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Q3. How can you effectively lead a successful team during your phase?
Ans. 
Effective leadership in software development involves communication, collaboration, and fostering a positive team culture.
• Establish clear goals: Define project objectives and ensure everyone understands their roles, like using Agile methodologies for clarity.

• Encourage open communication: Create an environment where team members feel comfortable sharing ideas and feedback, such as regular stand-up meetings.

• Foster collab...read more
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Based on JavaScript and Java.

A task based on JavaScript.

Q1. What is MERN Stack?
Ans. 
MERN Stack is a JavaScript-based technology stack for building dynamic web applications using MongoDB, Express.js, React, and Node.js.
• MongoDB: A NoSQL database that stores data in flexible, JSON-like documents.

• Express.js: A web application framework for Node.js that simplifies server-side development.

• React: A front-end library for building user interfaces, allowing for the creation of reusable UI components.

• Node.js: A ...read more
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Q2. NA for now
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Q1. Create a todo app with react and basic form validation
Ans. 
Create a todo app with react and basic form validation
• Use React to create components for adding, displaying, and deleting todos

• Implement basic form validation using state and event handlers

• Utilize CSS for styling the app and make it user-friendly
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Q2. Second most occuring character in the string
Ans. 
Find the second most occurring character in a string.
• Create a frequency map of characters in the string

• Sort the characters based on their frequency

• Return the second most frequent character
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Q3. Write a program to find sum and average of the digits that appear in the string, ignoring all other characters. string="PYnative29@#8496"
Ans. 
Program to find sum and average of digits in a string, ignoring other characters.
• Iterate through each character in the string and check if it is a digit.

• If it is a digit, convert it to an integer and add it to the sum.

• Keep track of the count of digits to calculate the average at the end.
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Q1. Find the second most occurrence of string.
Ans. 
Find the second most occurrence of string in an array of strings.
• Create a dictionary to store the count of each string in the array

• Sort the dictionary by count in descending order

• Return the key of the second element in the sorted dictionary
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Before Aptitude Test, There was a telephonic interview round in which they test your communication and ask questions about your education and projects. You just have to show your confidence to pass this round. After that, the aptitude test was quite easy. There are 15 questions all are doable in just 15 to 20 minutes of time span.

After that, The coding round takes place in which they provide you with a device with an online compiler of your preferred programming language and ask you to solve 4 questions without using any built-in function. The questions are based on Linked Lists, Stacks, Arrays, etc. You have to do it all manually. This round lasts up to 1 hour.

Q1. The technical round takes place in which they ask different questions from your coding round, a few concept-based ones, and also a few questions to test your thinking and problem-solving abilities like the...read more
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