Exceleron Software Interview Questions and Answers

The first 50 prime numbers are...

• Start with 2, the first prime number

• Check each odd number greater than 2

• Use trial division to check if a number is prime

• Stop when you have found 50 prime numbers

Sorting a file within a range

• Use a sorting algorithm like quicksort or mergesort

• Read the file and store the data in an array or list

• Sort the array or list within the given range

• Write the sorted data back to the file

I am a passionate software engineer with experience in developing web applications using various technologies.

• Experienced in developing web applications using HTML, CSS, JavaScript, and frameworks like React and Angular

• Proficient in backend development with Node.js, Express, and MongoDB

• Familiar with version control systems like Git and project management tools like Jira

I am a passionate software engineer with experience in developing web applications and a strong background in computer science.

• Experienced in developing web applications using technologies such as HTML, CSS, JavaScript, and React

• Strong background in computer science with knowledge in algorithms and data structures

• Passionate about learning new technologies and solving complex problems

I have worked on various projects including a web application for inventory management and a mobile app for fitness tracking.

• Developed a web application using React for inventory management

• Created a mobile app using Flutter for fitness tracking

• Implemented RESTful APIs for communication between frontend and backend systems

My area of interest is artificial intelligence and machine learning.

• I have experience in developing machine learning models for predictive analytics.

• I am interested in natural language processing and computer vision applications.

• I enjoy exploring deep learning algorithms and neural networks.

• I have worked on projects involving recommendation systems and image recognition.

C++ is a high-level programming language with features like object-oriented programming, templates, and memory management.

• C++ supports object-oriented programming concepts like encapsulation, inheritance, and polymorphism.

• Templates allow generic programming and code reusability.

• C++ provides low-level memory manipulation through pointers.

• Standard Template Library (STL) provides a collection of classes and functions for ...read more

Big Data refers to large and complex data sets that cannot be processed using traditional data processing methods.

• Big Data is characterized by the 3Vs - Volume, Velocity, and Variety.

• It requires specialized tools and technologies such as Hadoop, Spark, and NoSQL databases.

• Examples of Big Data include social media data, sensor data, and financial market data.

Program to reverse a string without using string function

• Iterate through the string from end to start and append each character to a new string

• Use a loop to swap the first and last characters, then move towards the middle until the entire string is reversed

• Convert the string to a character array, then swap the first and last elements until the entire array is reversed

I was responsible for designing and implementing the project's database and backend functionality.

• Designed the database schema and created the necessary tables

• Implemented the backend functionality using Java and Spring framework

• Collaborated with team members to integrate the frontend and backend components

• Tested the application and fixed any bugs or issues that arose

• Presented the project to the faculty and received pos

Keys in a database are unique identifiers used to establish relationships between tables and ensure data integrity.

• Keys are used to uniquely identify records in a database table.

• Primary keys are used to uniquely identify each record in a table.

• Foreign keys establish relationships between tables.

• Keys help enforce data integrity and maintain consistency in the database.

• Examples of keys include primary keys, foreign keys,

Issues in cloud include security, downtime, vendor lock-in, and data privacy.

• Security concerns such as data breaches and unauthorized access

• Downtime and service interruptions affecting business operations

• Vendor lock-in and limited flexibility in choosing cloud providers

• Data privacy and compliance with regulations such as GDPR and HIPAA

Developed a web application for online shopping using React and Node.js

• Implemented user authentication and authorization using JSON Web Tokens (JWT)

• Used MongoDB as the database to store user and product information

• Implemented a search feature using Elasticsearch to provide fast and accurate search results

• Integrated Stripe payment gateway for secure online transactions

The flow diagram of my final year project showcases the step-by-step process of its execution.

• The flow diagram illustrates the sequence of activities and their dependencies.

• It helps in understanding the overall structure and logic of the project.

• Each step in the diagram represents a specific task or action.

• Arrows indicate the flow of control or data between different steps.

• Decision points are represented by diamond-sha...read more

Normalisation reduces data redundancy and improves data integrity in a database.

• Prevents data duplication and inconsistencies

• Simplifies database maintenance and updates

• Improves query performance

• Enforces data integrity and consistency

• Follows best practices for database design

• Examples: breaking down a customer table into separate tables for orders, addresses, and payments

• Examples: creating a separate table for product ca...read more

I am a passionate software engineer with experience in developing web applications and a strong background in computer science.

• Experienced in developing web applications using technologies like HTML, CSS, JavaScript, and React

• Strong background in computer science with knowledge of algorithms and data structures

• Familiar with agile development methodologies and version control systems like Git

I am a problem solver, team player, quick learner, detail-oriented, and have strong communication skills.

• Problem solver - I enjoy tackling complex problems and finding innovative solutions.

• Team player - I work well with others and value collaboration in achieving goals.

• Quick learner - I am able to pick up new technologies and concepts quickly.

• Detail-oriented - I pay attention to the smallest details to ensure high-qual...read more

Yes, I have a Bachelor's degree in Computer Engineering.

• Bachelor's degree in Computer Engineering

• Experience in software development

• Knowledge of engineering principles applied to software design

My day was productive and challenging, with a lot of problem-solving and collaboration.

• Completed a major coding project ahead of schedule

• Participated in a brainstorming session with team members

• Solved a tricky bug in the codebase

• Attended a virtual meeting with stakeholders

No, I do not have any relatives in Pune. I have arranged for my accommodation in a rented apartment near the office.

• No relatives in Pune

• Accommodation arranged in a rented apartment near the office

Yes, My Passion Challenge test is a coding competition for software engineers.

• My Passion Challenge test is a coding competition that evaluates the coding skills of software engineers.

• It is designed to test problem-solving abilities, algorithmic thinking, and coding proficiency.

• Participants are given a set of coding challenges to solve within a specified time limit.

• The challenges can range from simple to complex, coveri...read more

Considering pursuing a Master's degree in Computer Science to deepen knowledge and advance career.

• Considering pursuing a Master's degree in Computer Science

• To deepen knowledge and advance career

• Examples: MS in Computer Science at XYZ University, online courses in AI and Machine Learning

To increase newspaper sales in the locality, I would focus on improving content, distribution, and marketing strategies.

• Conduct market research to understand readers' preferences and interests

• Create engaging and informative content that caters to the local audience

• Offer attractive subscription packages and discounts to encourage regular readership

• Partner with local businesses and events to increase visibility and distr...read more

I would like to add a feature that suggests nearby events and attractions based on user preferences.

• Personalized event and attraction recommendations

• Integration with ticketing platforms for revenue sharing

• Increased user engagement and retention

Algorithm to find 2 numbers in an array whose sum is equal to a target integer

• Use a hash table to store the difference between target and each element in the array

• Iterate through the array and check if the current element exists in the hash table

• Return the pair of elements that sum up to the target integer

Write a select statement to retrieve work of all users who belong to my team.

• Join USERS and WORK tables on user_id

• Join MANAGERS and USERS tables on team

• Filter by manager_id

The manifest.json file contains the most important information of a Chrome extension.

• The manifest.json file includes the version number, permissions, content scripts, background scripts, and other important details.

• It is located in the root directory of the extension.

• It is required for all Chrome extensions.

• Example: "manifest_version": 2, "version": "1.0", "permissions": ["tabs", "storage"]

Hashtable is faster for finding an item than a sorted list.

• Hashtable has constant time complexity O(1) for finding an item.

• Sorted list has logarithmic time complexity O(log n) for finding an item.

• Hashtable uses hashing to directly access the item's location.

• Sorted list requires binary search to find the item's location.

• Hashtable is ideal for large datasets with frequent lookups.

• Sorted list is ideal for datasets that re

JSON and XML are the most popular data interchange formats when using APIs.

• JSON (JavaScript Object Notation) is a lightweight format that is easy to read and write. It is widely used in web APIs.

• XML (Extensible Markup Language) is a more complex format that is also widely used in web APIs.

• Other formats include CSV (Comma Separated Values), YAML (YAML Ain't Markup Language), and Protocol Buffers.

Popular APIs for Social Commerce services

• Facebook Graph API for social media integration

• Instagram API for photo sharing and tagging

• Twitter API for real-time updates and customer engagement

• Pinterest API for product discovery and sharing

• Google Maps API for location-based services

• PayPal API for secure payment processing

Use a script to iterate through each HTML page, locate phone numbers, and update their format.

• Write a script using a programming language like Python or JavaScript to iterate through each HTML page

• Use regular expressions to locate phone numbers in the pages

• Update the format of the phone numbers as needed (e.g. adding country code, changing separators)

• Save the updated HTML pages with the new phone number format

Designing Google Suggest system

• I would start by analyzing user search patterns and frequently searched keywords

• Then, I would create a database of these keywords and their associated search results

• I would use indexing services to quickly retrieve relevant results for each keyword

• I would also implement machine learning algorithms to improve the accuracy of suggestions over time

Check if a number is a power of 2 and odd.

• To check if a number is a power of 2, use bitwise AND operator with the number and its predecessor. If the result is 0, it is a power of 2.

• To check if a number is odd, use modulus operator with 2. If the result is 1, it is odd.

• Example code in Python:

• def is_power_of_two(num):

• return num & (num - 1) == 0

• def is_odd(num):

• return num % 2 == 1

By introducing new menu items, optimizing pricing strategy, and improving the overall dining experience.

• Conduct a survey to understand the preferences of employees

• Introduce healthy and affordable meal options

• Offer discounts for bulk orders or loyalty programs

• Partner with local vendors to source fresh ingredients

• Improve the ambiance and seating arrangements

• Implement online ordering and delivery services

Reviewing 30 million ads from 42 languages in Google AdWords and rejecting non-compliant ads requires a systematic approach.

• Create a set of specific rules and guidelines for ad compliance

• Use automated tools to filter out ads that violate the rules

• Assign a team of reviewers to manually check the remaining ads

• Ensure that the reviewers are fluent in the languages of the ads they are reviewing

• Regularly update the rules and...read more