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I was interviewed in Feb 2017.
A photo viewer app for Android devices.
Use RecyclerView to display a grid of photos
Implement a caching mechanism to improve performance
Support gestures for zooming and swiping between photos
Integrate with a cloud storage service for photo storage and retrieval
Implement a search feature to allow users to find specific photos
Given an array of natural numbers, find the first missing natural number.
Sort the array and iterate through it to find the first missing number.
Use a hash set to keep track of the numbers present in the array.
The first missing number will be the smallest positive integer not present in the array.
To transfer the Ball object from one thread to another in Android, we can use Handler or AsyncTask.
Use Handler to post the Ball object from one thread to another
Create a Handler in the receiving thread and use its post() method to receive the Ball object
Alternatively, use AsyncTask to perform the transfer in the background thread and update the UI thread with the Ball object
IPC (Inter-Process Communication) methods in Android allow communication between different processes.
Binder: Android's default IPC mechanism, provides high-performance communication between processes.
AIDL (Android Interface Definition Language): Used to define the programming interface for IPC using Binder.
Intents: Used for asynchronous communication between components within an application or between different applica...
A HashMap is a data structure that stores key-value pairs and provides constant time complexity for basic operations.
Implement a hash function to convert keys into array indices
Create an array to store the key-value pairs
Handle collisions using a technique like chaining or open addressing
Implement methods like put(), get(), and remove() to interact with the HashMap
To search for contacts with duplicate names and numbers, create a search function that checks both fields.
Create a function that takes a search term as input
Iterate through the list of contacts
Check if the search term exists in the Name field or Num field
Return the contacts that match the search term
Launch mode determines how a new instance of an activity is created and added to the task stack.
Standard: Creates a new instance of the activity each time it is launched.
SingleTop: If an instance of the activity already exists at the top of the stack, it will be reused.
SingleTask: If an instance of the activity already exists in the stack, it will be brought to the front and cleared of any activities above it.
SingleIns...
Deep linking in Android allows linking to specific content within an app, enabling seamless navigation.
Deep linking is achieved by defining intent filters in the app's manifest file.
The intent filter specifies the data format and scheme for the deep link.
Deep links can be triggered from other apps, websites, or even notifications.
Handling deep links involves extracting data from the intent and navigating to the appropr
Design a screen to show 10 nearest restaurants in a list while keeping the UI uninterrupted.
Use a scrollable list view to display the restaurants
Implement a location-based search algorithm to find the nearest restaurants
Include a search bar to allow users to search for specific restaurants
Display relevant information for each restaurant such as name, rating, and distance
Implement filters or sorting options to allow use...
posted on 18 Mar 2024
It includes questions from aptitude as well as coding related questions, JAVA was the most common language in which majority of the coding questions were
posted on 23 Dec 2024
I applied via Company Website and was interviewed in Nov 2024. There were 2 interview rounds.
In the next five years, I envision myself leading a team of software engineers, working on cutting-edge technologies, and making significant contributions to the company's success.
Leading a team of software engineers
Working on cutting-edge technologies
Making significant contributions to the company's success
I am excited about the opportunity to work on complex software projects and contribute to innovative solutions.
Opportunity to work on complex software projects
Contribute to innovative solutions
Excited about the challenges and learning opportunities
Various data types in JavaScript include string, number, boolean, object, array, null, and undefined.
String: 'hello'
Number: 42
Boolean: true or false
Object: { key: value }
Array: [1, 2, 3]
Null: null
Undefined: undefined
Hoisting in JavaScript is the behavior where variable and function declarations are moved to the top of their containing scope during the compilation phase.
Variable declarations are hoisted to the top of their scope, but not their assignments.
Function declarations are fully hoisted, meaning they can be called before they are declared.
Hoisting can lead to unexpected behavior if not understood properly.
I applied via Instahyre and was interviewed in Oct 2024. There was 1 interview round.
Design LLD for Parking Lot
Create classes for ParkingLot, ParkingSpot, Vehicle, etc.
Implement methods for parking, unparking, checking availability, etc.
Consider different types of vehicles and parking spots (e.g. regular, handicapped, electric)
Include features like ticketing system, payment processing, and security measures
posted on 2 Sep 2024
The problem statement was given to solve.
Liskov Substitution Principle states that objects of a superclass should be replaceable with objects of its subclasses without affecting the program's correctness.
Subtypes must be substitutable for their base types.
Derived classes should be able to extend the functionality of base classes without changing their behavior.
Violating this principle can lead to unexpected behavior in the program.
Example: If a Square class i...
Abstraction is crucial in software development to simplify complexity, improve readability, and promote reusability.
Abstraction helps in hiding unnecessary details and focusing on essential features.
It allows developers to work at a higher level of understanding without getting bogged down in implementation details.
Abstraction promotes code reusability by creating modular and reusable components.
It improves code readab...
Unit testing is crucial in ensuring clean code by verifying the functionality of individual units of code.
Unit testing helps in identifying bugs and errors early in the development process.
It ensures that each unit of code works as expected in isolation.
Unit tests act as documentation for the codebase, making it easier for new developers to understand and modify the code.
It promotes code reusability and maintainability...
I applied via Campus Placement
Dsa problems dp and tress problem
Types of filters include low-pass, high-pass, band-pass, and band-stop filters.
Low-pass filter allows frequencies below a certain cutoff frequency to pass through.
High-pass filter allows frequencies above a certain cutoff frequency to pass through.
Band-pass filter allows a specific range of frequencies to pass through.
Band-stop filter blocks a specific range of frequencies from passing through.
Codechef easy level questions
Virtual DOM is a lightweight copy of the actual DOM used for efficient updates in web development.
Virtual DOM is a concept used in web development to improve performance by minimizing actual DOM manipulations.
Actual DOM refers to the real structure of the HTML elements on a webpage.
Virtual DOM is a representation of the actual DOM in memory that gets updated when changes are made, and then efficiently updates the actua...
I applied via Approached by Company and was interviewed in Feb 2024. There was 1 interview round.
Reactjs components are reusable, independent pieces of UI that can be composed together to build complex user interfaces.
Components are the building blocks of a React application
They can be class components or functional components
Components can have their own state and lifecycle methods
Components can be nested within other components to create a hierarchy
Examples: Button component, Navbar component, UserList component
Use the url to make a request to the API and fetch data.
Use a library like axios or fetch to make the HTTP request.
Parse the response data to extract the necessary information.
Handle any errors that may occur during the request.
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