Smart Cloud Infotech Senior Software Engineer Interview Questions and Answers for Experienced

Q1. Explain technical challenges you have come across and how did you overcome it?
Ans. 
I faced a technical challenge while implementing a complex algorithm for real-time data processing.
• Identified the bottleneck in the algorithm by profiling the code

• Optimized the algorithm by implementing data structures and algorithms with lower time complexity

• Tested the optimized solution thoroughly to ensure correctness and performance

• Collaborated with team members to brainstorm alternative approaches
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Q2. Explain the main feature of JavaScript frameworks
Ans. 
JavaScript frameworks provide pre-written code to simplify and speed up web development.
• Helps in organizing code and improving code quality

• Provides reusable components for faster development

• Offers built-in features like routing, state management, and data binding

• Examples: React, Angular, Vue
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Q1. Invert bits of a number
Ans. 
Invert the bits of a given number
• Use bitwise XOR operator (^) with 1 to flip each bit

• Repeat the process for all bits in the number

• Return the inverted number
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Q2. How do you support backward compatibility whiel designing a system
Ans. 
Backward compatibility can be supported by using versioning, deprecation strategies, and maintaining clear communication with users.
• Use versioning to clearly distinguish between different versions of the system

• Implement deprecation strategies to phase out old features gradually

• Maintain clear communication with users about upcoming changes and provide migration paths

• Consider using compatibility layers or adapters to bri...read more
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MCQ type questions related to Front end, Back end and involved few coding questions in the MCQ format

Q1. How would you debug an application to solve a production defect that was raised?
Ans. 
I would start by reproducing the issue, analyzing logs, checking code changes, and using debugging tools.
• Reproduce the issue to understand the exact scenario where the defect occurs.

• Analyze logs to identify any error messages or warnings related to the defect.

• Check recent code changes to see if any recent modifications could have caused the defect.

• Use debugging tools like breakpoints, logging, and profiling to trace th...read more
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Q2. What would you do if a defect can't be fixed?
Ans. 
I would analyze the impact of the defect and explore alternative solutions.
• Analyze the impact of the defect on the overall system functionality

• Discuss with the team to brainstorm alternative solutions

• Consider workarounds or temporary fixes while a permanent solution is being developed
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Q3. How would you implement breaking changes in the application?
Ans. 
Breaking changes can be implemented by following a structured process to minimize impact on users.
• Communicate the changes to stakeholders in advance

• Provide detailed documentation on the changes and how to adapt to them

• Implement versioning to allow users to choose when to adopt the changes

• Use feature flags to gradually roll out the changes and monitor impact

• Run thorough testing to ensure the changes do not introduce new
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Q1. Java and Springboot questions
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25 Aptitude questions - Normal level

3 coding question : Level - Moderate

Q1. Deep Javascript questions
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Q2. Reactjs qusetions
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Q1. Salary negotiation
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Q1. What is Kubernetes ? why it is required? how it is different from Docker swarm?
Ans. 
Kubernetes is an open-source container orchestration platform that automates the deployment, scaling, and management of containerized applications.
• Kubernetes is required to manage and scale containerized applications efficiently.

• It provides features like automatic scaling, self-healing, load balancing, and rolling updates.

• Kubernetes uses a declarative approach to define the desired state of the application and ensures ...read more
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Q2. What is ECS? How it is different from EKS?
Ans. 
ECS is a container management service by AWS, while EKS is a managed Kubernetes service.
• ECS (Elastic Container Service) is a container management service provided by AWS.

• ECS allows you to easily run and scale containerized applications on AWS.

• EKS (Elastic Kubernetes Service) is a managed Kubernetes service by AWS.

• EKS simplifies the process of deploying, managing, and scaling containerized applications using Kubernetes.

• ...read more
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Find give number is a prime or not

Q1. About project, daily tasks
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Q1. Explain promise in js
Ans. 
Promises in JavaScript are objects that represent the eventual completion or failure of an asynchronous operation.
• Promises are used to handle asynchronous operations such as fetching data from an API or reading a file.

• They provide a cleaner and more readable way to write asynchronous code compared to using callbacks.

• Promises have three states: pending, fulfilled, or rejected.

• They can be chained together using methods l...read more
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Q2. Explain setTimeout()
Ans. 
setTimeout() is a function in JavaScript that allows you to delay the execution of a function for a specified amount of time.
• setTimeout() takes two parameters: a function to be executed and a delay time in milliseconds

• The function passed to setTimeout() is executed once after the specified delay

• setTimeout() returns a unique identifier (timeout ID) that can be used to cancel the execution of the function using clearTime...read more
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