Decimal Technologies Senior Software Engineer Interview Questions and Answers

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
Answered by AI
Add your answer
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
Answered by AI
Add your answer

Q1. How do you manage your team
Add your answer
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
Answered by AI
Add your answer

Q1. Oops? .net core features
Add your answer

Application developement

2 DSA questions Both are from DP

Q1. 2 Questions , 1 is DSA
Add your answer
Q2. Second question is Puzzle
Add your answer

Q1. Question around priority queue
Add your answer
Q2. Decode strings leetcode
Ans. 
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
Answered by AI
Add your answer

Q1. System design questions scenario based
Add your answer

Q1. Questions on multidimensional tree
Add your answer

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'}}}])
Answered by AI
Add your answer

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.

Round duration - 180 minutes
Round difficulty - Hard

The test link had 3 days expiry so I could attempt test anytime. It was conducted on doselect.com

Q1. 
Equilibrium Indices in a Sequence
You are given an array/list named 'SEQUENCE', which consists of 'N' integers. The task is to identify all equilibrium indices in this sequence.
Explanation:
An equilibr...read more
Ans. 
The task is to find the equilibrium indices of a given sequence, where the sum of elements at lower indices is equal to the sum of elements at higher indices.
• Iterate through the sequence and calculate the total sum of all elements

• Initialize a left sum and right sum as 0

• For each index, update the left sum and right sum and check if they are equal

• If they are equal, add the index to the equilibrium indices

• Return the equil...read more
Answered by AI
Add your answer

Round duration - 60 minutes
Round difficulty - Medium

Video interview round wherein I was asked to wrote code for the problem statements given by the interviewer. The problems were mainly focused on advanced JS concepts like asynchonous progamming, timers, closures, and data structure problems around arrays, sets, linked list etc.

Q1. 
Rearrange Linked List Problem Statement
Given a singly linked list in the form 'L1' -> 'L2' -> 'L3' -> ... 'Ln', your task is to rearrange the nodes to the form 'L1' -> 'Ln' -> 'L2' -> '...read more
Ans. 
The task is to rearrange the nodes of a singly linked list in a specific order without altering the data of the nodes.
• Iterate through the linked list to find the middle node using the slow and fast pointer technique.

• Reverse the second half of the linked list.

• Merge the first and reversed second half of the linked list alternatively to get the desired order.
Answered by AI
Add your answer

Round duration - 30 minutes
Round difficulty - Easy

This was the last round with HR wherein they judged cultural fit and there was discussion on things like my expectations v/s their expectations etc.

It was simple and easily solvable.

There was 2 programs must pass the testcases.

There was written test of programming.

Q1. Why you choose infiniti
Ans. 
I chose Infiniti for its innovative culture, commitment to excellence, and opportunities for professional growth in software development.
• Innovative Culture: Infiniti fosters creativity, allowing developers to work on cutting-edge technologies like AI and machine learning.

• Commitment to Excellence: The company's focus on high-quality software aligns with my personal values of delivering robust and reliable solutions.

• Prof...read more
Answered by AI
Add your answer
Q2. Share about your self
Ans. 
I am a passionate software developer with a strong background in full-stack development and a love for problem-solving.
• Education: Bachelor's degree in Computer Science from XYZ University.

• Experience: 3 years of experience in developing web applications using React and Node.js.

• Projects: Developed an e-commerce platform that increased sales by 30% within the first quarter.

• Skills: Proficient in JavaScript, Python, and SQL...read more
Answered by AI
Add your answer

Q1. Oops concepts in java
Add your answer
Q2. Features
Add your answer