All About IT Blockchain Developer Interview Questions and Answers

Based on JavaScript and Java.

A task based on JavaScript.

Q1. Peak element in array
Ans. 
A peak element in an array is an element that is greater than or equal to its neighbors.
• Iterate through the array and check if the current element is greater than its neighbors.

• If the element at index i is greater than or equal to elements at indices i-1 and i+1, it is a peak element.

• Example: ['1', '3', '2', '4', '1'] has peak elements at index 1 and 3.
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Q2. 2 dimentional array rotate 90 degree
Ans. 
Rotate a 2D array by 90 degrees clockwise
• Transpose the array

• Reverse each row of the transposed array
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Pollitices current generation

3 hours coding test and majorly focus on javascript.

Q1. Oops concept, comparator vs comparable , design principles. TDD , Circuit breaker design , integration testing , diff between hibernate and jpa , springboot annotations , restApi basics .
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Q1. Basic hr questions
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There were 5 questions and we need to solve 4 questions in java. Mostly Array and string based.

Q1. It was 1 hour round 1. Technical Questions based on React, JavaScript, NodeJs.
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Q2. 2. Coding Round in React & JavaScript.
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Q1. It was Techno-Managerial Round. 1. Scenario based questions 2. Technical questions related to my skill sets. 3. Tools and Technologies used. 4. Previous Project Experience related Questions.
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Q1. 1. Self Introduction 2. Previous Work Experience 3. Explained about their Company Culture and explained about my Job Responsibilities.
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Q1. Difference between view and m-view
Ans. 
View is a virtual table based on a SQL query, while materialized view (m-view) is a physical copy of the data from the query.
• View is a virtual table that does not store data physically, while m-view is a physical copy of the data.

• Views are updated dynamically when queried, while m-views need to be refreshed to update the data.

• M-views are useful for improving query performance by pre-computing and storing results.
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Q1. Opps concepts, DSA algorithm
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