XYZ Tech Manager / Sr Manager - Administration Interview Questions and Answers

Round duration - 45 Minutes
Round difficulty - Medium

It was in the mid day and since I applied for a Frontend role the discussion was majorly around data structure and bit of Javascript.
The interviewer was helping and good listener.

Q1. 
Merge Two Sorted Linked Lists Problem Statement
You are provided with two sorted linked lists. Your task is to merge them into a single sorted linked list and return the head of the combined linked list.
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Ans. 
Merge two sorted linked lists into a single sorted linked list without using additional space.
• Create a dummy node to start the merged list

• Compare the values of the two linked lists and add the smaller value to the merged list

• Move the pointer of the merged list and the pointer of the smaller value list

• Continue this process until one of the lists is fully traversed

• Append the remaining elements of the other list to the me
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Q2. 
Sort 0 1 2 Problem Statement
Given an integer array arr of size 'N' containing only 0s, 1s, and 2s, write an algorithm to sort the array.
Input:
The first line contains an integer 'T' representing the n...read more
Ans. 
Sort an array of 0s, 1s, and 2s in linear time complexity.
• Use three pointers to keep track of 0s, 1s, and 2s while traversing the array.

• Swap elements based on the values encountered to sort the array in-place.

• Time complexity should be O(N) and space complexity should be O(1).
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Round duration - 60 Minutes
Round difficulty - Medium

It was more of a in depth round on the framework I'm working on and problem solving.

Q1. What is the event loop and what is its significance?
Ans. 
The event loop is a mechanism in programming that allows for asynchronous execution of code.
• The event loop is a key component in JavaScript's runtime environment, responsible for handling asynchronous operations.

• It continuously checks the call stack for any pending tasks and executes them in a non-blocking manner.

• The event loop ensures that the program remains responsive by allowing other code to run while waiting for ...read more
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Q2. Can you provide examples of output-based questions in JavaScript that utilize browser APIs?
Ans. 
Output-based questions in JavaScript using browser APIs
• Example 1: Write a script that uses the Geolocation API to display the user's current location on a map

• Example 2: Create a program that uses the Web Audio API to play a sound when a button is clicked

• Example 3: Develop a web page that uses the Canvas API to draw a simple animation
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Q3. How would you design a system to support localization in a mobile app?
Ans. 
Designing a system to support localization in a mobile app
• Use resource files to store localized strings for different languages

• Implement a language selection feature for users to choose their preferred language

• Utilize localization libraries or frameworks to streamline the process

• Consider cultural differences when localizing content, such as date formats and currency symbols
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Round duration - 75 Minutes
Round difficulty - Hard

It was more of a fitment/managerial round.
Didn't had any coding questions, but was asked more on approaches and optimisations.
Discussions on the project you have worked on.

Q1. You need to find the fastest 3 horses out of a group, given that you can only race 5 horses at a time. How would you approach this problem?
Ans. 
To find the fastest 3 horses out of a group with 5 horses racing at a time, we can use a tournament style approach.
• Divide the horses into groups of 5 and race them against each other. This will give you the fastest horse in each group.

• Take the winners from each group and race them against each other. The top 3 horses in this final race will be the fastest 3 overall.

• Keep track of the results and compare the timings to d
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Q2. How do you debug the root cause of lag on a screen?
Ans. 
To debug lag on a screen, analyze code, check for memory leaks, optimize rendering, and use profiling tools.
• Analyze code to identify any inefficient algorithms or operations causing lag.

• Check for memory leaks that could be impacting performance.

• Optimize rendering by reducing the number of draw calls, optimizing shaders, and minimizing overdraw.

• Use profiling tools like Xcode Instruments or Android Profiler to identify p
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Q3. Can you explain the architecture of the app you have recently worked on?
Ans. 
The app I recently worked on is a social media platform for sharing photos and connecting with friends.
• The app follows a client-server architecture, with the client being the mobile app and the server handling data storage and processing.

• The client side is built using React Native for cross-platform compatibility.

• The server side is implemented using Node.js with a MongoDB database for storing user data and photos.

• The a...read more
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Round duration - 90 Minutes
Round difficulty - Medium

It was in the morning at our institute. There were technical and aptitude problems.

Q1. 
Star Pattern Generation
Develop a function to print star patterns based on the given number of rows 'N'. Each row in the pattern should follow the format demonstrated in the example.
The picture illustra...read more
Ans. 
Function to print star patterns based on the given number of rows 'N'.
• Iterate through each row from 1 to N

• For each row, print spaces (N-row) followed by stars (2*row-1)

• Repeat until all rows are printed
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Round duration - 30 Minutes
Round difficulty - Medium

It was actually a Techno HR round. I was asked some technical questions about OS, OOPS, COMPUTER NETWORKING, WEB DEVELOPMENT. He went through my whole resume, asked about all the projects and past working experiences. The interviewer was really good, we talked about so many other topics, from Women empowerment to Water Crises. I felt really confident while speaking because he made me so comfortable.

Q1. 
Selection Sort Algorithm
Selection sort is a sorting technique that works by repeatedly finding the minimum element (considering ascending order) from the unsorted part and placing it at the beginning of ...read more
Ans. 
Selection Sort Algorithm sorts an array by repeatedly finding the minimum element and placing it at the beginning of the unsorted part.
• Iterate through the array to find the minimum element and swap it with the first unsorted element.

• Repeat this process for each element in the array until it is fully sorted.

• Time complexity of Selection Sort is O(n^2) making it inefficient for large arrays.
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Q1. 1) single linked list problem 2) substring matching
Ans. 
The first question is about a single linked list problem, and the second question is about substring matching.
• For the single linked list problem, you may need to implement operations like insertion, deletion, and traversal.

• For substring matching, you can use algorithms like brute force, Knuth-Morris-Pratt, or Boyer-Moore.

• Examples for the single linked list problem: reversing a linked list, finding the middle element, o...read more
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Q2. Single Linked list problem
Ans. 
The question is about solving a problem related to single linked lists.
• Understand the concept of a single linked list

• Implement basic operations like insertion, deletion, and traversal

• Consider edge cases like an empty list or a list with only one node
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Q3. String problem- substring matching
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Two leetcode mediums, one on strings and the other is on trees

Q1. Its a system design round on designing notification system
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Q2. Evaluate pull vs push based system.
Ans. 
Pull vs push based system refers to how data is transferred between components in a system.
• Pull system involves the receiver requesting data from the sender when needed.

• Push system involves the sender actively pushing data to the receiver without the receiver requesting it.

• Pull systems are more efficient when the receiver does not need data constantly.

• Push systems are more efficient when real-time data updates are requ...read more
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Q3. Which works when? Refer alexxu system design book
Ans. 
The question is about understanding the timing and order of operations in a system.
• Understanding the sequence of events in a system is crucial for ensuring proper functionality.

• Timing considerations include when data is processed, when actions are triggered, and when resources are allocated.

• Examples include knowing when to update a database record after receiving user input, or when to send a notification after a certa
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Q1. Write a sample code using AngularJS
Ans. 
Sample code using AngularJS
• Create a module and controller

• Bind data to HTML using directives

• Use services for data retrieval and manipulation

• Implement two-way data binding

• Example: https://codepen.io/mohit-kumar/pen/ExjJzjM
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Q1. Why did you leave the previous company
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Q1. Why are you looking for a change?
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Q1. What is doing shared_ptr in C++?
Ans. 
shared_ptr is a smart pointer in C++ that manages the memory of a dynamically allocated object.
• shared_ptr helps in managing memory by automatically releasing the memory when the last reference to the object is destroyed.

• It allows multiple shared_ptr instances to share ownership of the same dynamically allocated object.

• shared_ptr uses reference counting to keep track of the number of shared_ptr instances pointing to the...read more
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