Educational Initiatives Full Stack Developer Interview Questions and Answers

Q1. Introduction and knowledge of ERP
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Q2. Previous Experience
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Basic Aptitude test

Coding Round is little tough.

Q1. Formal conversation about the projects and all that kind of stuff
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Q2. What kind of project you have worked on
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Q3. How you tackles different project
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They will give you problem to solve

Machine coding round

Q1. Find duplicates in an array
Ans. 
Use a hash set to find duplicates in an array of strings.
• Create a hash set to store unique elements.

• Iterate through the array and check if the element is already in the hash set.

• If it is, then it is a duplicate. If not, add it to the hash set.
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Q2. Find single duplicate element in an array where contents of the array are length of array - 1
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Create a student support system

Q1. Design an order and payments system for an EdTech company
Ans. 
Design an order and payments system for an EdTech company
• Allow users to browse and select courses

• Implement a shopping cart for users to add courses

• Integrate payment gateways for secure transactions

• Provide order confirmation and receipt to users

• Allow users to track their order status
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3 questions, 1 hour. Questions mostly on DP, Graphs and strings

Q1. Pollfill for Promise Function
Ans. 
Pollfill is a function that returns a promise which resolves when a condition is met.
• Pollfill function should return a promise

• The promise should resolve when a specific condition is met

• Use polling mechanism to check the condition at regular intervals
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Q2. Difference between throttling and Debouncing
Ans. 
Throttling limits the number of times a function can be called over time, while debouncing ensures a function is only called after a certain amount of time has passed without it being called.
• Throttling limits the rate at which a function can be called, preventing it from being called more than once in a specified time frame.

• Debouncing waits for a specified amount of time to pass after the last time a function was calle...read more
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Q1. About Myself in details
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Q2. Past internships and work experiences
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Q1. Primary keys, Unique key
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Q2. Usage advantages and disadvantages of Indexing
Ans. 
Indexing improves data retrieval speed but can increase storage and maintenance costs.
• Faster query performance: Indexes allow for quicker data retrieval. For example, searching for a user by ID is faster with an index.

• Reduced I/O operations: Indexes minimize the number of disk reads required to find data, enhancing performance.

• Increased storage requirements: Indexes consume additional disk space, which can be significa...read more
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SQL- 1 departments with no users
2 dept_id and their respective no. of users

DSA1: Most frequent no. in an array
DSA2: Zero Sum subarray exists

Basic coding maths aptitude java python communication skills test

Java coding c plus python SQL oracle dbmsos

Given two arrays [1, 1, 2, 3, 1] and [2, 1, 1, 3, 1], write the code to check for their equality, where equality means that both arrays contain the same elements. Approach 1 involves sorting the arrays and then using a for loop to check for equality; however, sorting has a higher time complexity. The interviewer prefers a solution with O(n) time complexity. Approach 2 suggests using a HashMap to count the occurrences of each element, allowing us to achieve this in O(n) time complexity.