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Blinkit SDE-2 Interview Questions, Process, and Tips

Updated 20 May 2022

Blinkit SDE-2 Interview Experiences

1 interview found

SDE-2 Interview Questions & Answers

user image Anonymous

posted on 20 May 2022

I appeared for an interview in May 2022.

Round 1 - Face to Face 

(1 Question)

Round duration - 60 Minutes
Round difficulty - Medium

Timing was around 11 am
Environment was great, it intrigued me to join Blinkit.

  • Q1. 

    Pair Sum Problem Statement

    You are given an integer array 'ARR' of size 'N' and an integer 'S'. Your task is to find and return a list of all pairs of elements where each sum of a pair equals 'S'.

    Note:
    ...
  • Ans. 

    Find pairs of elements in an array that sum up to a given value, sorted in a specific order.

    • Sort the array in non-decreasing order.

    • Use two pointers approach to find pairs with sum equal to 'S'.

    • Return pairs in sorted order based on first value, with smaller second value coming first.

  • Answered by AI
Round 2 - Face to Face 

(3 Questions)

Round duration - 60 Minutes
Round difficulty - Medium

Timing 11 am
Interviewer had good knowledge

  • Q1. Can you explain the activity lifecycle in Android development?
  • Ans. 

    Activity lifecycle in Android development involves various states like onCreate, onStart, onResume, onPause, onStop, onDestroy.

    • Activity is created with onCreate() method

    • Activity becomes visible with onStart() and onResume() methods

    • Activity goes into background with onPause() method

    • Activity is stopped with onStop() method

    • Activity is destroyed with onDestroy() method

  • Answered by AI
  • Q2. Can you explain the fragment lifecycle in Android development?
  • Ans. 

    Fragment lifecycle in Android involves various states like created, started, resumed, paused, stopped, and destroyed.

    • Fragments are created using the onCreateView() method.

    • Fragments go through states like created, started, resumed, paused, stopped, and destroyed based on user interactions and system events.

    • Fragment lifecycle methods include onCreate(), onStart(), onResume(), onPause(), onStop(), and onDestroy().

  • Answered by AI
  • Q3. Can you explain the MVVM pattern?
  • Ans. 

    MVVM is a design pattern that separates the user interface from the business logic and data model.

    • MVVM stands for Model-View-ViewModel

    • Model represents the data and business logic

    • View represents the UI components

    • ViewModel acts as an intermediary between the Model and View, handling user input and updating the Model

    • MVVM promotes separation of concerns and easier unit testing

  • Answered by AI
Round 3 - Face to Face 

Round duration - 30 Minutes
Round difficulty - Easy

This round is cultural fit round

Interview Preparation Tips

Professional and academic backgroundI applied for the job as SDE - 2 in BangaloreEligibility criteriaNoGrofers interview preparation:Topics to prepare for the interview - Data structures, Threading and synchronisation, Kotlin vs Java, Activities lifecycle, Fragment lifecycle, Android services, Reduce APK size, Create analytics libraryTime required to prepare for the interview - 1 monthInterview preparation tips for other job seekers

Tip 1 : Prepare easy/medium level data structures questions in leetcode. Solve atleast 50 questions of multiple types like strings, arrays, tree, linked list, graph
Tip 2 : Go through Android basic questions like lifecycle, live data, MVC/mvp/ mvvm pattern, retrofit, data binding
Tip 3 : Atleast solve 5 design questions like how to build Instagram, analytics library, crashlytics

Application resume tips for other job seekers

Tip 1 : be concise 
Tip 2 : write only those keywords which you have in depth knowledge

Final outcome of the interviewSelected

Skills evaluated in this interview

Interview questions from similar companies

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
No response

I applied via Job Portal and was interviewed in Jun 2024. There were 3 interview rounds.

Round 1 - Coding Test 

I don't remember the ques

Round 2 - Technical 

(1 Question)

  • Q1. System design of notification system
  • Ans. 

    Design a scalable notification system for sending real-time alerts to users.

    • Use a distributed system to handle high volume of notifications.

    • Implement message queues for asynchronous processing.

    • Utilize push notifications for mobile devices.

    • Include a user preference system for customizing notification settings.

    • Consider implementing a notification history feature for users to view past alerts.

  • Answered by AI
Round 3 - Technical 

(1 Question)

  • Q1. System design of google pay
  • Ans. 

    Google Pay is a digital wallet platform and online payment system developed by Google.

    • Google Pay uses secure tokenization to protect user's payment information.

    • It integrates with various payment methods like credit/debit cards, UPI, and NFC.

    • The system handles transactions, user authentication, and merchant integrations.

    • Google Pay leverages Google's infrastructure for scalability and reliability.

    • It provides features lik

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Look for interview exp

Skills evaluated in this interview

SDE-2 Interview Questions & Answers

Spinny user image Anonymous

posted on 14 Apr 2023

Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
-

I applied via LinkedIn and was interviewed in Mar 2023. There were 5 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Coding Test 

3 Coding question, mix of easy medium and hard questions. Online proctored on Hackerrank

Round 3 - Technical 

(1 Question)

  • Q1. 1. A variation on 2 sum problem (based on number of digits) 2. Average of node value and its subtree (Count no of nodes where average of the subtree and the node itself equals to the node value). It was t...
  • Ans. 

    2 sum problem variation based on number of digits and finding nodes where average of subtree and node value equals node value.

    • For the 2 sum problem variation, use a hash table to store the digits and their indices.

    • For the subtree problem, use a recursive function to traverse the tree and calculate the average.

    • Examples: [1, 2, 3, 4, 5] with target 7 and tree with root 5, left child 4, right child 6, should return 2 and

  • Answered by AI
Round 4 - Technical 

(1 Question)

  • Q1. I was asked an LLD question about a system to manage and track cars and their maintenance. Also some questions based on run time polymorphism and SQL
Round 5 - One-on-one 

(1 Question)

  • Q1. Discussion with the CTO. You get to explain about the work you did and some clarifying questions.

Interview Preparation Tips

Interview preparation tips for other job seekers - Practice DSA from standard sheets available and also some variations on them. Practice SQL and LLD questions as well. Entire process will be quite smooth

Skills evaluated in this interview

SDE-2 Interview Questions & Answers

Meesho user image Anonymous

posted on 21 May 2022

I appeared for an interview in Jun 2021.

Round 1 - Face to Face 

(2 Questions)

Round duration - 60 minutes
Round difficulty - Medium

- It was a face to face (virtually) round.
- Two questions one after one and you are expected to pass all the test cases.
- Question was Easy and Medium Easy. (tags: stack, array, bfs, dfs, array)

- Timing: Afternoon
- Interviewer: he was nice, as I was able to solve both question, he was very happy, and given me the feedback.

  • Q1. 

    Remove Consecutive Duplicates from String

    Given a string STR consisting of both lower and upper case characters, your task is to remove consecutive duplicate characters and return the newly formed string.

    ...
  • Ans. 

    The task is to remove consecutive duplicate characters from a given string and return the new string.

    • Iterate through the characters of the string

    • Compare each character with the next character

    • If they are the same, skip the next character

    • If they are different, append the current character to the new string

  • Answered by AI
  • Q2. 

    Number of Islands Problem Statement

    You are provided with a 2-dimensional matrix having N rows and M columns, containing only 1s (land) and 0s (water). Your goal is to determine the number of islands in t...

  • Ans. 

    The task is to find the number of islands present in a 2-dimensional array filled with ones and zeroes.

    • Iterate through each cell in the array

    • If the cell is land (1) and not visited, perform a depth-first search to find all connected land cells

    • Increment the count of islands for each connected component found

  • Answered by AI
Round 2 - Coding Test 

Round duration - 135 minutes
Round difficulty - Medium

Machine Coding.

Timing: Afternoon
The interviewer was answering my questions nicely.

Round 3 - HR 

Round duration - 60 minutes
Round difficulty - Medium

Hiring Manager.
Interviewer: Sr Engineering Manager.
Timing: evening.

The environment was cool.

Interview Preparation Tips

Eligibility criteria7+ CGPAMeesho interview preparation:Topics to prepare for the interview - Data Structures: - Arrays, Stack, Sliding Windows, Two Pointers, BFS, DFS, Dynamic Programming(Medium) OOPS & LLD:- Educative (Grokking the Object-Oriented Programming)- Design Patterns: Refactoring guru- Multithreading - Udemy (Java Multithreading, Concurrency & Performance Optimization)HLD:- Educative: grokking-the-system-design-interview- Book: System Design Interview – An Insider's Guide (Alex Xu)Database:- Relational database: articles blogsTime required to prepare for the interview - 4 MonthsInterview preparation tips for other job seekers

Tip 1 : Stick to one coding platform either do it from geeks for geeks, coding ninja or leetcode. Never jump from one platform to other. Focus on Building the concept rather than solving it.
Tip 2 : Follow the Grooking the Object-Oriented Programming, and try to follow SOLID principle as much as you can. If possible take some MOCK interviews.
Tip 3 : Build your concept on Relational databases, you should be able to design the table structures and relationships.
Tip4: You should aware of your project and your contribution to it. Project Objective should be clear. You should know the tech stack used in project, and reason for choosing it.

Application resume tips for other job seekers

Tip 1 : Don't write too many paragraphs in the project description, It should be pointwise.
Tip 2 : Don't highlight too many skills, like HTML CSS kind of things.
Tip 3 : One page.
Tip 4 : If you are not a fresher, no need to mention school achievements.

Final outcome of the interviewSelected

Skills evaluated in this interview

SDE-2 Interview Questions & Answers

Meesho user image Anonymous

posted on 11 Nov 2022

I appeared for an interview in May 2022.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - One-on-one 

(1 Question)

  • Q1. Data Structures and Algorithms
Round 3 - Technical 

(1 Question)

  • Q1. Machine Coding round

Interview Preparation Tips

Interview preparation tips for other job seekers - Strong at Data Structures and Algorithms, and good system design knowledge

I applied via Naukri.com and was interviewed before Mar 2021. There were 3 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Aptitude Test 

Online aptitude test with general aptitude questions.

Round 3 - One-on-one 

(1 Question)

  • Q1. Basic js, ES6 features, Angular Questions, Node.js Lifecycle, event loop, mongodb questions, some HR questions

Interview Preparation Tips

Interview preparation tips for other job seekers - Prepare what you are going to appear for, means technologies!

I applied via Recruitment Consultant and was interviewed in Jun 2020. There was 1 interview round.

Interview Questionnaire 

1 Question

  • Q1. Questions are about fresh department only

Interview Preparation Tips

Interview preparation tips for other job seekers - You should know about fresh department

I appeared for an interview before Sep 2020.

Round 1 - Face to Face 

(2 Questions)

Round duration - 60 Minutes
Round difficulty - Easy

  • Q1. 

    0/1 Knapsack Problem Statement

    A thief is planning to rob a store and can carry a maximum weight of 'W' in his knapsack. The store contains 'N' items where the ith item has a weight of 'wi' and a value of...

  • Ans. 

    Yes, the 0/1 Knapsack problem can be solved using dynamic programming with a space complexity of not more than O(W).

    • Use a 1D array to store the maximum value that can be stolen for each weight capacity from 0 to W.

    • Iterate through each item and update the array based on whether including the item would increase the total value.

    • The final value in the array at index W will be the maximum value that can be stolen.

  • Answered by AI
  • Q2. 

    Find the Second Largest Element

    Given an array or list of integers 'ARR', identify the second largest element in 'ARR'.

    If a second largest element does not exist, return -1.

    Example:

    Input:
    ARR = [2,...
  • Ans. 

    Find the second largest element in an array of integers.

    • Iterate through the array to find the largest and second largest elements.

    • Handle cases where all elements are identical.

    • Return -1 if a second largest element does not exist.

  • Answered by AI
Round 2 - Video Call 

(1 Question)

Round duration - 60 Minutes
Round difficulty - Easy

System Design Round

  • Q1. Design a system for Twitter, discussing its architecture, key components, and scalability considerations.
  • Ans. 

    Design a scalable system for Twitter with key components and architecture.

    • Use microservices architecture for scalability and fault isolation.

    • Key components include user service, tweet service, timeline service, and notification service.

    • Use a distributed database like Cassandra for storing tweets and user data.

    • Implement a message queue like Kafka for handling real-time updates and notifications.

    • Use a caching layer like ...

  • Answered by AI
Round 3 - HR 

Round duration - 30 Minutes
Round difficulty - Easy

It is just a formality

Interview Preparation Tips

Professional and academic backgroundI applied for the job as SDE - 1 in BangaloreEligibility criteriaResume shortlistingSwiggy interview preparation:Topics to prepare for the interview - OOPS, Data Structures, Core Java, Algorithms, DBMS, SQL,Time required to prepare for the interview - 3 monthsInterview preparation tips for other job seekers

Tip 1 : System Design
Tip 2 : Practice questions from leetcode
Tip 3 : Have some projects.

Application resume tips for other job seekers

Tip 1 : Mention what you know 
Tip 2 : Good previous work to showcase

Final outcome of the interviewSelected

Skills evaluated in this interview

I applied via Referral and was interviewed in Feb 2021. There were 4 interview rounds.

Interview Questionnaire 

2 Questions

  • Q1. Technical Questions (SQL and Python)
  • Q2. Business case studies

Interview Preparation Tips

Interview preparation tips for other job seekers - Brush up SQL skills, learn different methods of solving the same problem, learn basics of python, especially Pandas and Numpy

Interview Questionnaire 

10 Questions

  • Q1. What do you do when your schedule is interrupted? How you handle it?
  • Q2. PreOrder traversal without recursion?
  • Ans. 

    PreOrder traversal without recursion is done using a stack to simulate the function call stack.

    • Create an empty stack and push the root node onto it.

    • While the stack is not empty, pop a node from the stack and process it.

    • Push the right child of the popped node onto the stack if it exists.

    • Push the left child of the popped node onto the stack if it exists.

  • Answered by AI
  • Q3. Build a bst out of the unsorted array by looping over the array and inserting each element to the tree?
  • Ans. 

    Yes

    • Create an empty binary search tree (BST)

    • Loop over the unsorted array

    • For each element, insert it into the BST using the appropriate insertion logic

    • Repeat until all elements are inserted

    • The resulting BST will be built from the unsorted array

  • Answered by AI
  • Q4. Find 2 elements in array whose sum is equal to given number?
  • Ans. 

    The question asks to find two elements in an array whose sum is equal to a given number.

    • Iterate through the array and for each element, check if the difference between the given number and the current element exists in the array.

    • Use a hash set to store the elements as you iterate through the array for efficient lookup.

    • Return the pair of elements if found, otherwise return a message indicating no such pair exists.

  • Answered by AI
  • Q5. How many types of trigger?
  • Ans. 

    There are two types of triggers: DML triggers and DDL triggers.

    • DML triggers are fired in response to DML (Data Manipulation Language) statements like INSERT, UPDATE, DELETE.

    • DDL triggers are fired in response to DDL (Data Definition Language) statements like CREATE, ALTER, DROP.

    • Examples: A DML trigger can be used to log changes made to a table, while a DDL trigger can be used to enforce certain rules when a table is alt

  • Answered by AI
  • Q6. Can trigger be used with select statement?
  • Ans. 

    Yes, triggers can be used with select statements in SQL.

    • Triggers are database objects that are automatically executed in response to certain events, such as insert, update, or delete operations.

    • While triggers are commonly used with insert, update, and delete statements, they can also be used with select statements.

    • Using triggers with select statements allows you to perform additional actions or validations before or af...

  • Answered by AI
  • Q7. Indexing in mysql? How many types of indexing in mysql?
  • Ans. 

    Indexing in MySQL improves query performance. There are several types of indexing in MySQL.

    • Indexes are used to quickly locate data without scanning the entire table.

    • Types of indexing in MySQL include B-tree, hash, full-text, and spatial indexes.

    • B-tree indexes are the most common and suitable for most use cases.

    • Hash indexes are used for exact match lookups.

    • Full-text indexes are used for searching text-based data efficie...

  • Answered by AI
  • Q8. Engines in mysql?
  • Ans. 

    Engines in MySQL are the underlying software components that handle storage, indexing, and querying of data.

    • MySQL supports multiple storage engines, each with its own strengths and features.

    • Some commonly used engines in MySQL are InnoDB, MyISAM, and Memory.

    • InnoDB is the default engine in MySQL and provides support for transactions and foreign keys.

    • MyISAM is known for its simplicity and speed but lacks transaction suppo...

  • Answered by AI
  • Q9. Singlton pattern?
  • Q10. Can a constructor be private?
  • Ans. 

    Yes, a constructor can be private.

    • A private constructor can only be accessed within the class itself.

    • It is often used in singleton design pattern to restrict object creation.

    • Private constructors are also useful for utility classes that only contain static methods.

  • Answered by AI

Interview Preparation Tips

Skills: Algorithm, Data structure
College Name: na

Skills evaluated in this interview

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