VISTRA INTERNATIONAL EXPANSION Software Engineer Interview Questions and Answers

Q1. Asked everything that was present in my resume
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Q2. DBMS, OOps were asked a lot and react as well
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Q1. .net questions, web api
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Q1. Lifecycle hooks of Angular
Ans. 
Angular lifecycle hooks are methods that allow you to tap into specific points in a component's lifecycle.
• ngOnChanges: called when an input property changes

• ngOnInit: called once the component is initialized

• ngDoCheck: called during every change detection run

• ngAfterContentInit: called after content (ng-content) has been projected into the component

• ngAfterContentChecked: called after every check of the projected content

• ng...read more
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Q2. SOLID principles
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Q1. Questions on SQL
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Q1. Introduction and basic questions
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Q1. How team works in your project?
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Q1. About projects and internship
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Q2. About my experience leading a team
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This aptitude + technical MCQ test was of 120 minutes in duration. Had MCQs on quantitative ability, logical ability, Language, and technical MCQs consisted of questions on DBMS, OS, Networks, DSA. There were two coding questions as well. One on Bit Manipulating, and the other on DFS.

Q1. A question on BFS very similar to Leetcode 924. Was given one hour to discuss and come to an optimized solution with the interviewer.
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Q1. Search an element in a sorted and rotated array
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Search an element in a sorted and rotated array
• Find the pivot point where the array is rotated

• Divide the array into two sub-arrays based on pivot point

• Perform binary search on the appropriate sub-array
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Q2. SQL query on left join
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Q3. Questions on CPP memory management
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Q4. Questions related to projects done
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Q1. Propose a system for a popular media stream service
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Proposed system for a popular media stream service
• Implement a recommendation engine to suggest content based on user preferences and viewing history

• Integrate with social media platforms to allow users to share and discuss content

• Provide multiple subscription options with varying levels of access and features

• Ensure high-quality streaming with minimal buffering through the use of content delivery networks

• Implement robust...read more
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Q2. Questions related to Fullstack Tech Stacks
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Guesstimate on number of Reddit users in India. No starting input was given. Gave solution by using bottom to top approach. Tried to focus on quantifying teenagers with internet access and a particular interest about internet. Gave a figure around ~1 million in a year.

Q1. Where do you see yourself at McKinsey?
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Q1. About Project and expertise
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Q2. Why BCG?
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Q1. Polymorphism, OS Deadlock
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Q1. More about how to resolved code merge issue in Git
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60 mins and basic quants-based questions along with SQL

Q1. Multi-Threading in Python - GIL
Ans. 
Global Interpreter Lock (GIL) in Python restricts execution of multiple threads at once to prevent race conditions.
• GIL is a mutex that protects access to Python objects, preventing multiple threads from executing Python bytecodes at once.

• This means that even in a multi-threaded Python program, only one thread can execute Python code at a time.

• GIL can limit the performance of multi-threaded Python programs, especially f...read more
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Q2. Certifications in my resume - AWS and Ethical Hacking
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