Lokal App Analyst Interview Questions and Answers

Q1. There was just 1 to on chatting - i believe the interviewer himself doesn't know anything
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Q2. What's your name?
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Q3. Previous job detials
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Q4. Expectations in this company
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Q1. Merge Sort based question
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Q1. DP based question
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Q1. Design API Rate Limiter
Ans. 
Design an API rate limiter to control the number of requests a user can make within a certain time frame.
• Implement a token bucket algorithm to track and limit the number of requests per user.

• Set a maximum limit of requests per user per time frame (e.g. 100 requests per hour).

• Use a sliding window to track the requests and reset the limit after the time frame expires.
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Q1. DSA round and medium level
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Q2. Merge sort type/variation
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Q1. Data Structure and Algorithms
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Q1. System Design LLD round
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Round duration - 60 Minutes
Round difficulty - Easy

This round consisted of DSA questions and they were looking for good coding practices.

Q1. 
Aggressive Cows Problem Statement
Given an array representing positions of stalls and an integer ‘K’ representing the number of aggressive cows, determine the largest minimum distance between any two cows ...read more
Ans. 
The problem is to assign aggressive cows to stalls in a way that maximizes the minimum distance between any two cows.
• Sort the array of stall positions in ascending order.

• Use binary search to find the largest minimum distance between cows.

• Check if it is possible to assign cows with this minimum distance by iterating through the sorted array.

• If it is possible, update the maximum distance and continue binary search for a ...read more
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Q2. 
Next Greater Element Problem Statement
Given a list of integers of size N, your task is to determine the Next Greater Element (NGE) for every element. The Next Greater Element for an element X is the firs...read more
Ans. 
The task is to find the next greater element for each element in the given array.
• Iterate through the array from right to left.

• Use a stack to keep track of the elements that are greater than the current element.

• For each element, pop elements from the stack until a greater element is found or the stack is empty.

• If a greater element is found, it is the next greater element for the current element.

• If the stack becomes empt...read more
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Round duration - 60 Minutes
Round difficulty - Easy

This round consisted of React related questions, javascript questions.

It was a DSA ALGO Medium round

Q1. Design an analytics system
Ans. 
Designing an analytics system for data analysis and visualization
• Define the goals and objectives of the analytics system

• Identify the data sources and types of data to be collected

• Choose appropriate tools and technologies for data processing and analysis

• Design a data model and architecture for storing and accessing data

• Implement data visualization techniques for presenting insights to users
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Q1. General HR questions about salary, workstyle, motivation etc
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Basic stack and array questions

Q1. Design question on creating a funnel for referral approvals in company
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Q2. Which DB is the best choice
Ans. 
There is no one-size-fits-all answer to which DB is the best choice, as it depends on the specific requirements of the project.
• Consider the type of data being stored (structured, unstructured, etc.)

• Evaluate the scalability and performance needs of the project

• Take into account the budget and resources available for maintenance and support

• Look at the existing technology stack and compatibility with other systems

• Consider ...read more
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Q1. Creating feed of fb with ads integrated
Ans. 
Integrate ads into Facebook feed for monetization
• Utilize Facebook Audience Network for ad integration

• Implement native ads for seamless user experience

• Use targeting options to display relevant ads to users
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Q1. Tell about event loop.
Ans. 
Event loop is a mechanism in programming that allows for asynchronous execution of code by continuously checking for and handling events.
• Event loop is commonly used in JavaScript to handle asynchronous operations.

• It allows for non-blocking I/O operations by delegating tasks to the operating system.

• Event loop continuously checks the event queue for any pending events and executes them in a sequential manner.

• Example: In ...read more
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