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HALODOC Senior Data Scientist Interview Questions and Answers

Updated 9 Mar 2020

HALODOC Senior Data Scientist Interview Experiences

1 interview found

I applied via Referral and was interviewed in Feb 2020. There were 5 interview rounds.

Interview Questionnaire 

2 Questions

  • Q1. Was asked to code a tweet classifier.
  • Q2. Was asked to design a recommendation engine

Interview Preparation Tips

Interview preparation tips for other job seekers - Be prepared on basics, first principles have to be strong, design discussions and architecture of the whole solution are important.

Interview questions from similar companies

Interview experience
2
Poor
Difficulty level
-
Process Duration
-
Result
-
Round 1 - One-on-one 

(1 Question)

  • Q1. ML questions related to previous projects
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Approached by Company and was interviewed in Jan 2024. There were 2 interview rounds.

Round 1 - Technical 

(2 Questions)

  • Q1. Mimic Dataframe Merge
  • Ans. 

    Implement a function to mimic the functionality of merging two DataFrames in Python.

    • Create a function that takes two DataFrames as input.

    • Merge the two DataFrames based on a common column or index.

    • Handle different types of joins like inner, outer, left, and right joins.

    • Return the merged DataFrame as output.

  • Answered by AI
  • Q2. Improve above case by case
Round 2 - Coding Test 

1 hour - Find longest palindromic substring

I applied via LinkedIn and was interviewed before May 2021. There was 1 interview round.

Round 1 - One-on-one 

(3 Questions)

  • Q1. Leet code problem solving
  • Q2. Microservices spring boot
  • Q3. Manager round, job responsibilities, project discuss

Interview Preparation Tips

Interview preparation tips for other job seekers - Practice leet code problem solving, understanding of microservices, spring boot and spring cloud

I applied via Naukri.com and was interviewed in Dec 2021. There were 3 interview rounds.

Round 1 - Technical 

(1 Question)

  • Q1. Problem solving (coding)
Round 2 - One-on-one 

(1 Question)

  • Q1. Technical discussion
Round 3 - HR 

(1 Question)

  • Q1. HR discussion, pay discussion

Interview Preparation Tips

Topics to prepare for One Trust Senior Software Engineer interview:
  • Java
  • Angularjs
Interview preparation tips for other job seekers - Less job security, be cautious while accepting the offer. Check for layoff happened on June 9th 2022. There was a mass layoff (removed 950 employees)

I applied via Naukri.com and was interviewed in Feb 2021. There were 3 interview rounds.

Interview Questionnaire 

1 Question

  • Q1. All related to project worked on wlan testing and networking concepts

Interview Preparation Tips

Interview preparation tips for other job seekers - Overall Good.
They gave taken 3 technical and 1hr round

I applied via Naukri.com and was interviewed in Nov 2021. There were 3 interview rounds.

Interview Questionnaire 

7 Questions

  • Q1. 1) What is volatile? 2) What is constant? 3) Can we use volatile and const at a time?4) What is ISR how it works?
  • Ans. 

    Answers to questions related to software engineering concepts.

    • Volatile is a keyword used to indicate that a variable's value can be changed unexpectedly.

    • Constant is a keyword used to indicate that a variable's value cannot be changed once it is assigned.

    • Volatile and const can be used together to indicate that a variable's value cannot be changed and that it may change unexpectedly.

    • ISR stands for Interrupt Service Routi...

  • Answered by AI
  • Q2. What is pointer? Explain dangling pointer, null pointer, void pointer.
  • Ans. 

    A pointer is a variable that stores the memory address of another variable. Dangling, null, and void pointers are types of pointers.

    • Dangling pointer: a pointer that points to a memory location that has been deallocated or freed

    • Null pointer: a pointer that does not point to any memory location

    • Void pointer: a pointer that has no specific data type and can point to any data type

  • Answered by AI
  • Q3. Storage classes explain all the storage classes in c.
  • Ans. 

    Storage classes in C define the scope and lifetime of variables.

    • auto: default storage class for local variables

    • register: stores variables in CPU registers for faster access

    • static: retains value between function calls

    • extern: used to access global variables across multiple files

  • Answered by AI
  • Q4. Compilation stages.
  • Q5. Projects done at previous company with clear explanation.
  • Q6. CAN, SPI, I2C, UART differences.
  • Q7. Explain CAN data frame.
  • Ans. 

    CAN data frame is a message format used in Controller Area Network (CAN) protocol.

    • CAN data frame consists of 7 fields: Start of Frame (SOF), Arbitration ID, Control Bits, Data Length Code (DLC), Data Field, Cyclic Redundancy Check (CRC), and End of Frame (EOF).

    • The Arbitration ID field is used to identify the message priority and the source of the message.

    • The Data Field can contain up to 8 bytes of data.

    • The CRC field is...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Just go through whatever things you have kept on your resume. Go through the project. Practice C as much as possible most of the questions will be asked on C programming.

Skills evaluated in this interview

Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Approached by Company and was interviewed in Sep 2023. There were 2 interview rounds.

Round 1 - Coding Test 

2 Leetcode medium - LRU Cache and sliding window question

Round 2 - System Design 

(1 Question)

  • Q1. Design Whatsapp
  • Ans. 

    Design a messaging app like Whatsapp

    • Implement end-to-end encryption for secure messaging

    • Allow users to send text messages, images, videos, and documents

    • Include features like group chats, voice and video calls, status updates

    • Provide option for users to share their location

    • Develop a user-friendly interface with customizable settings

  • Answered by AI

Skills evaluated in this interview

Interview Questionnaire 

1 Question

  • Q1. What is Obser
  • Ans. 

    Obser is not a known term in software engineering.

    • Obser is not a known term in software engineering.

    • It is possible that the interviewer misspoke or meant to ask a different question.

    • It is important to clarify any unclear or confusing questions during an interview.

  • Answered by AI

Skills evaluated in this interview

I applied via Naukri.com and was interviewed before Sep 2020. There were 6 interview rounds.

Interview Questionnaire 

2 Questions

  • Q1. Python program like print day, month and year from current date and fibonacci series
  • Q2. Bluetooth concept basics

Interview Preparation Tips

Interview preparation tips for other job seekers - Prepare only program and basic concepts

HALODOC Interview FAQs

What are the top questions asked in HALODOC Senior Data Scientist interview?

Some of the top questions asked at the HALODOC Senior Data Scientist interview -

  1. was asked to design a recommendation eng...read more
  2. was asked to code a tweet classifi...read more

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₹18 L/yr - ₹38 L/yr
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