SAP Senior Software Engineer Interview Questions and Answers

Q1. Opps, overloading and overriding, factory n singleton patteren
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Q2. Collections HashMap internal working
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Q1. Write polyfill for array map
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Q1. Tell me about your experience?
Ans. 
I have over 8 years of experience in software development, specializing in backend systems and database management.
• Developed scalable backend systems using Java and Spring framework

• Designed and optimized database schemas for performance

• Led a team of developers in implementing new features and resolving technical issues

• Worked on integrating third-party APIs for enhanced functionality
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Q2. Asked deeply on my current project?
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Q3. What are difficulties you faced in your work?
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Difficulties faced include complex technical challenges, tight deadlines, and communication issues.
• Complex technical challenges such as optimizing performance of a large-scale system

• Tight deadlines requiring quick turnaround on projects

• Communication issues with team members or stakeholders leading to misunderstandings
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Q1. Get minimum from stream. Query based.
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Q2. Minimum number of platforms for trains. Arrival n departure time is given.
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Q1. Design Instagram feed
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Designing Instagram feed involves displaying user's photos and videos in a visually appealing and user-friendly manner.
• Display user's posts in a grid layout with images/videos and captions

• Allow users to like, comment, and share posts

• Implement infinite scrolling to load more posts as user scrolls down

• Include a search bar to search for specific users or hashtags
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A code to identify errors and write Junit. Optimise the code as well.

Q1. Stacks using queue
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Implementing a stack using two queues
• Use two queues to simulate a stack

• Push operation: Enqueue the element to queue 1

• Pop operation: Dequeue all elements from queue 1 to queue 2, dequeue the last element from queue 1, then swap the queues

• Top operation: Return the front element of queue 1

• Example: Push 1, 2, 3 - Queue 1: [1, 2, 3], Queue 2: []

• Example: Pop - Queue 1: [1, 2], Queue 2: [3]
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Q2. BFS and Knapsack problem, previous project experience
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