Airtel Africa Senior Software Engineer Interview Questions and Answers

Q1. Technical Interview + Coding
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Q1. Technical Interview
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The coding test was for 90 mins, and comprised of questions from topics such as DP and hashtables. It was taken on hackerrank platform

Q1. One question related to hashing (particularly about hashcode and equals method)
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Q2. A variation of number of connected islands from graph
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Q1. Thread synchronisation, print alternate numbers using 5 different threads
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Q2. C++ Related questions were asked, in which I was asked about how can I find the size of Object, difference between malloc and calloc. What are semaphores and how are they used
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Q1. It was completely on the project worked on using the spring boot. 1)how to handle if the applciation is restarting continuously 2)how to load multiple applccation property file in sequential way 3)how to h...read more
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Q1. Project related questions
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Coding Leetcode medium question

Q1. Design BookMyShow HLD and LLD
Ans. 
Design high-level and low-level architecture for BookMyShow
• HLD should include components like user interface, booking engine, payment gateway, etc.

• LLD should detail the classes, methods, and interactions within each component

• Use technologies like Java, Spring Boot, MySQL for backend and React for frontend

• Consider scalability, fault tolerance, and security in the design
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Q1. Salary, Role Expectations and Negotiations
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Q1. Technical Questions relevant to your domain and your previous experience.
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Q1. This Round is with your manager and Questions relevant to behavior, self-confidence, technical in quick overview
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Q1. Relevant to experience and self confidence, salary Discussion and further process guidelines
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Q1. Basic PHP Questions on Arrays, implode, explode function difference, include, require difference.etc
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Q2. Basics MySQL questions, asked some queries
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Q1. Asked questions based on payment gateway.
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Q1. Salary discussion, explained roles and responsibilities
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Coding test data structures and language related

Q1. Related to resume technology
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1. Reversing a linked list.
2. Find all substrings in a string.

Q1. Oops Concepts, DBMS, Array Manipulation, Design Patterns.
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Q2. System Design- Design an online food delivery platform
Ans. 
Design an online food delivery platform
• Identify target audience and their needs

• Create a user-friendly interface for ordering food

• Develop a robust backend system for managing orders and deliveries

• Partner with local restaurants to offer a wide variety of cuisines

• Implement a payment gateway for secure transactions

• Provide real-time order tracking for customers

• Ensure food safety and quality through proper packaging and deli...read more
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