Deem Software Interview Questions and Answers

Q1. C# , oops & mvc. Be clear with basic concepts
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Q2. What is the four pillars of oops
Ans. 
The four pillars of OOP are Abstraction, Encapsulation, Inheritance, and Polymorphism.
• Abstraction: Hiding implementation details and showing only necessary information.

• Encapsulation: Binding data and functions that manipulate it together.

• Inheritance: Creating new classes from existing ones, inheriting their properties and methods.

• Polymorphism: Ability of objects to take on multiple forms or behaviors.
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Q3. What is mvc and how it helps the developers
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MVC stands for Model-View-Controller. It is a software design pattern that separates an application into three interconnected components.
• Model represents the data and business logic of the application

• View is responsible for rendering the user interface

• Controller handles user input and updates the model and view accordingly

• MVC helps developers to write clean, modular and maintainable code

• It also enables parallel develop...read more
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Q1. How to capture rooftop
Ans. 
To capture rooftop, use drones for aerial photography and mapping.
• Use drones equipped with high-resolution cameras to capture detailed images of the rooftop

• Ensure the drone flies at an appropriate altitude to capture the entire rooftop area

• Consider using photogrammetry software to create 3D models of the rooftop based on the images captured

• Plan the flight path of the drone to cover the entire rooftop efficiently

• Review ...read more
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Q2. How to use arcmap
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ArcMap is a geographic information system software used for creating, analyzing, and managing geographic data.
• ArcMap is part of the ArcGIS suite of software developed by Esri.

• It allows users to create maps, perform spatial analysis, and manage geographic data.

• Users can add layers of data, perform geoprocessing tasks, and create layouts for printing or sharing.

• ArcMap uses a project-based approach, where users can save t...read more
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Any word of character count how many times have reach character

Q1. Please tell me something about your self?
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Q2. How many years of experience?
Ans. 
I have over 5 years of experience in software engineering, focusing on full-stack development and agile methodologies.
• Full-Stack Development: I have worked on both front-end and back-end technologies, including React for UI and Node.js for server-side logic.

• Agile Methodologies: I have participated in multiple Agile projects, contributing to sprint planning and daily stand-ups to ensure timely delivery.

• Collaboration: I ...read more
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Q1. IOS: Explain MVVM, Memory Management, Closures, unit test cases etc.
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Q2. Android: Coroutines and Flow, CoroutineScope, Jetpack compose basics etc.
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Q1. It was mostly on scenario based questions and I was asked to code online.
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Q1. Discussion were there past projects, how different objectives were done.
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Q1. Round 1 was hackerrank test. MCQs and coding questions.
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Q2. Kafka related questions.
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Q3. Java 8 related questions. Java streams.
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Q1. System design for robust e-commarce site
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Q2. How to reduce the failure rate for payment gateway which is communicating to multiple 3rd party wallets and credit card transactionm
Ans. 
Implementing strategies to enhance reliability and reduce failure rates in payment gateway integrations.
• Implement retries with exponential backoff for failed transactions to handle temporary issues.

• Use circuit breakers to prevent overwhelming third-party services during outages.

• Monitor and log transaction failures to identify patterns and root causes.

• Implement fallback mechanisms to alternative payment methods when pri...read more
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Q1. Multithreading and Java8 coding question
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Q2. System design question on payments, design patterns and Java, Spring Questions
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