Pramata Knowledge Solutions Full Stack Developer Interview Questions and Answers

Round duration - 30 minutes
Round difficulty - Easy

This round mainly consisted of some questions on advanced JS topics like Execution Context, Callback queue, Micro task queue, Promises, etc.

Round duration - 60 minutes
Round difficulty - Medium

This round was more technical compared to the previous one. The interviewer was a senior developer. If questions were not answered, answers would be given/explained.

Q1. What are some aggregate operators in MongoDB?
Ans. 
Aggregate operators in MongoDB are used for data aggregation and manipulation.
• Some aggregate operators in MongoDB include $sum, $avg, $min, $max, $push, $addToSet, $first, $last, $project, $match, $group, $sort, $limit, $skip.

• Example: db.collection.aggregate([{$group: {_id: '$field', total: {$sum: '$value'}}}])
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Round duration - 30 minutes
Round difficulty - Easy

This round was mainly to assess my experience level, roles, and responsibilities from my previous company. Salary negotiations also happened here.

2 Query question and 3 coding questions

Q1. Basic oops , Java script and Networking questions.
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Q2. What is object orienteered programming.
Ans. 
Object oriented programming is a programming paradigm based on the concept of objects, which can contain data and code.
• Objects are instances of classes, which define the structure and behavior of the objects.

• Encapsulation, inheritance, and polymorphism are key principles of object oriented programming.

• Example: Java, C++, Python are popular languages that support object oriented programming.
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Q3. Different Events in java script
Ans. 
Events in JavaScript are actions or occurrences that happen in the browser that the code can respond to.
• Events can be triggered by user actions (like clicking a button), browser actions (like page load), or system events (like a timer expiring)

• Event listeners are used to listen for and respond to events

• Common events include click, mouseover, keydown, submit, etc.
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Q4. Event listeners
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Project , coding question, DBMS

Q1. Basic personal details
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Aptitude test was of 1 hr

It was about 1 hr duration

Q1. What do you know about oops
Ans. 
Object-oriented programming paradigm focusing on objects and classes
• Encapsulation: Bundling data and methods that operate on the data into a single unit (object)

• Inheritance: Ability of a class to inherit properties and behavior from another class

• Polymorphism: Ability to present the same interface for different data types

• Abstraction: Hiding the complex implementation details and showing only the necessary features
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Q2. Tell me about encapsulation
Ans. 
Encapsulation is the concept of bundling data and methods that operate on the data into a single unit.
• Encapsulation helps in hiding the internal state of an object and restricting access to it.

• It allows for better control over the data by preventing outside interference.

• Encapsulation also promotes code reusability and modularity.

• Example: In object-oriented programming, classes encapsulate data fields and methods to ope...read more
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Q1. How do you manage your team
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Q2. Why should I hire you
Ans. 
I bring a unique blend of technical skills, problem-solving abilities, and a passion for collaboration that drives successful projects.
• Proven experience in multiple programming languages, including Java and Python, demonstrated through successful project completions.

• Strong problem-solving skills, exemplified by a project where I optimized an algorithm, reducing processing time by 30%.

• Excellent teamwork and communicatio...read more
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Simple aptitude think logically

Basic coding string and array concepts

Q1. Object Oriented concepts
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Q2. Basic coding questions
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Q1. Object Oriented concepts
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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
Ans. 
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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Q1. Implement tail f
Ans. 
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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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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