QCI Interview Questions and Answers

Q1. How would you utilize AWS or Azure services to create scalable web applications
Ans. 
Utilize AWS or Azure services for scalable web applications
• Use AWS Elastic Beanstalk or Azure App Service for easy deployment and scaling

• Leverage AWS Lambda or Azure Functions for serverless computing

• Utilize AWS Auto Scaling or Azure Autoscale to automatically adjust resources based on traffic

• Store data in AWS RDS or Azure SQL Database for scalable database solutions

• Use AWS CloudFront or Azure CDN for content delivery
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Q2. How would you tackle memory leaks if the system your working on was experiencing this issue?
Ans. 
I would use memory profiling tools to identify the source of the leaks and then fix them by properly managing memory allocation and deallocation.
• Use memory profiling tools like Valgrind or Instruments to identify the source of the leaks

• Review the code to ensure proper memory allocation and deallocation practices are being followed

• Implement smart pointers or garbage collection to automatically manage memory

• Use static co...read more
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Q3. Have you worked on legacy systems?
Ans. 
Yes, I have experience working on legacy systems.
• I have successfully maintained and upgraded legacy systems to meet current business needs.

• I have refactored legacy code to improve performance and scalability.

• I have integrated new technologies with legacy systems to enhance functionality.

• I have experience troubleshooting and debugging issues in legacy systems.
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Q1. Are you capable to work with cross functional teams and handle disputes effectively
Ans. 
Yes, I have experience working with cross functional teams and resolving disputes effectively.
• I have successfully collaborated with team members from different departments to achieve project goals.

• I am skilled at mediating conflicts and finding mutually beneficial solutions.

• I prioritize open communication and actively listen to all team members' perspectives.

• I have experience using conflict resolution techniques such a
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Q1. What is the difference between HashMap and ConcurrentHashMap?
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Q2. HashMap is not thread-safe, but ConcurrentHashmap is thread-safe and allows concurrent access.
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Q1. Talk about your work experience. Detailed questions about projects that I worked on.
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Q2. Why are you interested in switching.
Ans. 
Seeking new challenges and growth opportunities in a dynamic field.
• Interested in leveraging my skills and experience in a new environment

• Excited about the potential to work on innovative products

• Looking for opportunities to expand my knowledge and expertise
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Q3. Do you use any food delivery apps frequently? What would you improve in Swiggy?
Ans. 
Yes, I frequently use food delivery apps like Swiggy.
• I use Swiggy at least a few times a week for ordering food.

• I appreciate the wide variety of restaurants and cuisines available on Swiggy.

• Improvement suggestion: Enhance the user interface for a smoother ordering experience.

• Improvement suggestion: Implement a more accurate delivery time estimation system.

• Improvement suggestion: Offer more personalized recommendations
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Q4. What is northstar metric, what would be northstar metric for Swiggy
Ans. 
Northstar metric is the key metric that drives the core value of a product. For Swiggy, the northstar metric could be Daily Active Users (DAU) or Orders per User.
• Northstar metric is the single metric that best captures the core value that your product delivers to customers.

• For Swiggy, the northstar metric could be Daily Active Users (DAU) as it represents the number of unique users who engage with the platform on a dai...read more
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Q1. Explain what you worked on, how did you grow the adoption of the feature.
Ans. 
I worked on improving the adoption of a new feature by conducting user research, implementing user feedback, and creating targeted marketing campaigns.
• Conducted user research to understand user needs and preferences

• Implemented user feedback to make necessary improvements to the feature

• Created targeted marketing campaigns to promote the feature to the right audience
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Q2. Design product to manage risks during an event. Sub-question- How would this change if the target market is tier 3 cities in India
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Mintu Babu lives in a smaller house than her brother and in a larger house than her parents. Her children reside with her, and she has no other relatives. If Mintu Babu's relative U lives in a larger house than her relative S, then all the following may be true except: \n\n1) S is U's father \n\n2) S is U's mother \n\n3) U is younger than S \n\n4) S is younger than U

Q1. 1. merge two linked list
Ans. 
Merge two sorted linked lists without creating new nodes by rearranging existing nodes.
• Traverse both linked lists simultaneously

• Compare the values of nodes and rearrange pointers accordingly

• Continue until one of the lists is fully traversed
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Q2. 2. reverse a linked list.
Ans. 
Reverse a linked list by changing the direction of pointers.
• Start with three pointers: current, previous, and next.

• Iterate through the linked list, updating pointers to reverse the direction.

• Update the head of the linked list to be the previous node once iteration is complete.
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Q1. What is react why it's used?
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Q1. What is virtual DOM in react?
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Filter and shot the filter block based on title using redux?

Q1. Can you please introduce yourself?
Ans. 
I am a Software Development Engineer with 5 years of experience in developing web applications using Java, Spring, and Angular.
• 5 years of experience in software development

• Proficient in Java, Spring, and Angular

• Strong problem-solving skills

• Experience in developing web applications

• Good team player
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Q2. What type of questions are being asked?
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2 coding questions,20 mcq-from coderbyte

Q1. They told selected, but still not scheduled 1:1 round, never wait, they gave mail also selected, but not scheduled 1:1 , its having 2 months
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Q1. Still now not scheduled
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Test was of 1.5 hrs and it was online. It was completely based on technical questions.

This test was offline and it was a pen paper test wherein 10 questions will be given you have to write code or spot the error and correct them.

Q1. Asked questions about React
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Q2. Question based on project
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