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Koo App Sde1 Interview Questions and Answers

Updated 5 Jun 2024

Koo App Sde1 Interview Experiences

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Sde1 Interview Questions & Answers

user image Anonymous

posted on 5 Jun 2024

Interview experience
3
Average
Difficulty level
Hard
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Campus Placement and was interviewed before Jun 2023. There were 3 interview rounds.

Round 1 - Coding Test 

I have been asked 1 DSA question and 1 SQL question as the company came for campus recruitment.

Round 2 - Technical 

(3 Questions)

  • Q1. Discussion on Java and its fundamentals.
  • Q2. Dynamic Programming question.
  • Q3. Discussion over projects.
Round 3 - HR 

(1 Question)

  • Q1. Basic HR questions like why you want to join us and all.

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Round 1 - Technical 

(8 Questions)

  • Q1. 1. What is a doubly-linked list? And real-world applications.
  • Ans. 

    A doubly-linked list is a data structure where each node contains a reference to both the previous and next nodes.

    • Allows traversal in both directions

    • Used in implementing LRU cache

    • Used in browser history

    • Used in undo-redo functionality

  • Answered by AI
  • Q2. 2. Advantage of doubly linked list over singly LL?
  • Ans. 

    Doubly linked list allows traversal in both directions, while singly linked list only allows traversal in one direction.

    • Doubly linked list allows for efficient deletion of nodes compared to singly linked list.

    • Doubly linked list can be traversed in both forward and backward directions.

    • Doubly linked list can be used to implement a stack or queue.

    • Singly linked list requires less memory than doubly linked list.

    • Doubly linke...

  • Answered by AI
  • Q3. 3. Applications of Graph Data Structure
  • Ans. 

    Graph data structure is used in various applications such as social networks, routing algorithms, and recommendation systems.

    • Social networks use graphs to represent users and their connections.

    • Routing algorithms use graphs to find the shortest path between two points.

    • Recommendation systems use graphs to analyze user behavior and suggest relevant items.

    • Graphs are also used in computer networks, image processing, and mac...

  • Answered by AI
  • Q4. 4. Tree Traversals (Inorder, Preorder and Postorder)
  • Q5. 5. Remove duplicate elements and sort related scenario-based questions. Have to discuss the approach and then have to code it.
  • Q6. 6. Similar to bubble sort. Have to discuss the approach and then have to code it.
  • Q7. 7. What is the difference between In-memory DB and MySQL?
  • Ans. 

    In-memory DB stores data in RAM for faster access while MySQL stores data on disk.

    • In-memory DB is faster than MySQL as it eliminates disk I/O operations.

    • In-memory DB is suitable for real-time applications that require low latency.

    • MySQL is suitable for applications that require data persistence and durability.

    • In-memory DB may not be suitable for large datasets as it requires a lot of RAM.

    • MySQL supports complex queries a...

  • Answered by AI
  • Q8. 8. SQL related basic questions
Round 2 - Technical 

(7 Questions)

  • Q1. 1. Difference between RDBMS and NoSQL
  • Ans. 

    RDBMS is a structured database that uses SQL while NoSQL is a non-relational database that doesn't use SQL.

    • RDBMS stores data in tables with predefined schema while NoSQL stores data in documents, key-value pairs, or graphs.

    • RDBMS is good for complex queries and transactions while NoSQL is good for scalability and handling unstructured data.

    • Examples of RDBMS include MySQL, Oracle, and SQL Server while examples of NoSQL i

  • Answered by AI
  • Q2. 2. What is indexing?
  • Ans. 

    Indexing is the process of organizing data in a database or search engine to improve search efficiency.

    • Indexing creates a data structure that allows for faster retrieval of information.

    • It involves creating an index that maps the location of data in a database or search engine.

    • Indexing can be done on various types of data, such as text, numbers, and dates.

    • Examples of indexing methods include B-tree, hash, and bitmap ind

  • Answered by AI
  • Q3. 3. Scenario-based question: One employee table is there. We execute query One without indexing, one with indexing. What will be the difference?
  • Q4. 4. Explain the internal working of the above question.
  • Ans. 

    The question is unclear and requires clarification.

    • The question is not specific about what 'above question' it is referring to.

    • The term 'internal working' is also vague and needs to be defined.

    • Without more information, it is impossible to provide a meaningful answer.

  • Answered by AI
  • Q5. 5. Print the right view of the binary tree. Have to discuss the approach and then have to code it.
  • Q6. 6. Different modifications in the above question and then have to tell approaches like print left view of a binary tree.
  • Q7. 7. Print internal nodes of a binary tree (internal nodes means except nodes present in the left and right view)
  • Ans. 

    Print internal nodes of a binary tree (excluding left and right view nodes)

    • Traverse the tree in post-order and check if the node has both left and right children

    • If yes, then it is an internal node and print it

    • If no, then continue traversing the tree

    • Example: For the tree 1-2-4-5-3, the internal nodes are 2 and 4

  • Answered by AI
Round 3 - HR 

(1 Question)

  • Q1. They ask you to introduce yourself, followed by questions regarding your background goals, strengths, etc.

Interview Preparation Tips

Topics to prepare for Park Plus Sde1 interview:
  • Questions from your projects
Interview preparation tips for other job seekers - It is advisable to practice questions online from resources like Leetcode to improve your problem-solving ability. Good Knowledge of Database Management and DSA is essential. While explaining your approach to the interviewer, it would be great to explain it with some examples, which will make it easier for him to understand your approach.

Skills evaluated in this interview

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Approached by Company and was interviewed before Oct 2022. There were 4 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Don’t add your photo or details such as gender, age, and address in your resume. These details do not add any value.
View all Resume tips
Round 2 - Technical 

(1 Question)

  • Q1. Merge Sort based question
Round 3 - Technical 

(1 Question)

  • Q1. DP based question
Round 4 - Behavioral 

(1 Question)

  • 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.

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Just medium leetcode questions

Skills evaluated in this interview

I applied via Naukri.com and was interviewed before Feb 2021. There were 2 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 Resume tips
Round 2 - Group Discussion 

Market related question

Interview Preparation Tips

Interview preparation tips for other job seekers - Keep knowledge in advance. Marketing and sales related.

I applied via Indeed and was interviewed before Jun 2019. There were 4 interview rounds.

Interview Questionnaire 

3 Questions

  • Q1. Business problems and case studies
  • Q2. Guesstimates
  • Q3. Experience to date
  • Ans. 

    I have 3 years of experience working as a Data Analyst in the finance industry.

    • Analyzed financial data to identify trends and make recommendations

    • Created reports and dashboards using tools like Tableau and Excel

    • Collaborated with cross-functional teams to improve data quality and accuracy

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Use your basic aptitude.

I applied via Recruitment Consulltant and was interviewed before Sep 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 Resume tips
Round 2 - Assignment 

Question regarding market understanding

Round 3 - One-on-one 

(2 Questions)

  • Q1. Why do you want switch job?
  • Q2. What campaign would you like to run in this Navratri?

Interview Preparation Tips

Topics to prepare for ShareChat Senior Associate interview:
  • Short video industry
Interview preparation tips for other job seekers - Learn about competitors. Have a good understanding of market. Get knowledge of trending content.
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Company Website and was interviewed before Nov 2022. There were 2 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 Resume tips
Round 2 - Technical 

(2 Questions)

  • Q1. SQL Joins Question
  • Q2. Tough Python Questions
Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(1 Question)

  • Q1. JS basics, promise, async await, debounce, etc.

Interview Preparation Tips

Interview preparation tips for other job seekers - Na
Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(1 Question)

  • Q1. Few questions of javascript along with coding round and few angular related concepts
Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(1 Question)

  • Q1. Joins and basics
Round 2 - Case Study 

Netflix user churn case study,
Uber booking number reduce

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Koo App Interview FAQs

How many rounds are there in Koo App Sde1 interview?
Koo App interview process usually has 3 rounds. The most common rounds in the Koo App interview process are Coding Test, Technical and HR.
What are the top questions asked in Koo App Sde1 interview?

Some of the top questions asked at the Koo App Sde1 interview -

  1. Discussion on Java and its fundamenta...read more
  2. Dynamic Programming questi...read more

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