Promatics Technologies Node JS Developer Interview Questions and Answers

Basic Logical programs

Q1. Explain laravel Structure
Ans. 
Laravel is a PHP framework with a structured architecture for building web applications efficiently.
• MVC Architecture: Laravel follows the Model-View-Controller pattern, separating logic, presentation, and data.

• Directory Structure: Key directories include app (application logic), config (configuration files), and routes (URL definitions).

• Eloquent ORM: Laravel provides an Object-Relational Mapping system for database int...read more
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Q2. Database migration
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Q3. What is indexing in database
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Indexing in databases improves data retrieval speed by creating a data structure that allows quick access to rows in a table.
• Indexes are like a book's index, allowing quick location of data without scanning the entire table.

• Common types of indexes include B-trees, hash indexes, and full-text indexes.

• For example, a B-tree index allows efficient range queries, while a hash index is optimal for equality searches.

• Indexes c...read more
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Q4. What is controller ,What is Route
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Q1. Why you leave your previous Company
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Q2. What is your role in previous company
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Mixture of aptitude and coding questions

Implementing a design shown on paper, using php

Q1. Technical questions asked
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Q2. And also about last company experiences
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Q1. Question around priority queue
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Q2. Decode strings leetcode
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Decode strings involves interpreting encoded patterns like '3[a2[c]]' to produce 'accaccacc'.
• Use a stack to handle nested structures. Example: For '2[abc]', push '2' and 'abc' onto the stack.

• Iterate through the string, building numbers and characters. Example: '3[a2[c]]' becomes '3', 'a', '2', 'c'.

• When encountering ']', pop from the stack until '[' is found, then repeat the string as per the number. Example: '2[c]' bec...read more
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Q1. System design questions scenario based
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Q1. Questions on multidimensional tree
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Q1. Explain basics of c#
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C# is a programming language developed by Microsoft for building a wide range of applications on the .NET framework.
• C# is an object-oriented language with features like classes, inheritance, and polymorphism.

• It is strongly typed, meaning variables must be declared with a specific data type.

• C# supports modern programming concepts like async/await for asynchronous programming.

• It is commonly used for developing desktop, w...read more
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Q2. C# basics oops sql server
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Q1. Oops? .net core features
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Q1. Implement tail f
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Implementing 'tail -f' allows real-time monitoring of file changes, displaying new lines as they are added.
• Use file handling in Python to open a file in read mode.

• Utilize a loop to continuously read new lines from the file.

• Implement a sleep function to avoid busy waiting and reduce CPU usage.

• Example: Use 'with open(filename) as f:' to manage file context.

• Use 'f.seek(0, 2)' to move to the end of the file before reading ...read more
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Logical reasoning ,verbal aptitude , two java program and html
duration 1hr

Hand written java coding 5 problem statement oops, String, Arrays and others

Q1. About infiniti software solution
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Q2. Questions in java
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