Hi fishes,

I get this question a lot in interviews, so can anyone please let me know the answer?

When to use groupBy key and reduceBy key?

like
Posting as :
works at
You are currently posting as works at

Is this SQL related question?

This is PySpark related

Yes PySpark related

Reducebykey uses combiner, faster in performance

D

Post Photo
like

Reducebykey can not be used for non commutative and non associative operation

Related Posts

Anyone here interviewed at or work for Nice? Would like to hear your thoughts/experience. Thanks in advance!

like

Hello fish,

After how many days of PWC final round can i expect hr call. Thanks in advance

How much female software engineer expect salary for 4 year experience with skill fullstack developer ( dotnet core,SQL and angular). Many companies interview cracked but hr not ready give more than 12 13. 20 days notice period still left. How to negotiate on salary part. Please suggest

like

Hi, I currently do CyberSecurity work for Accenture and want to apply to Bain. Do any Bain folks know of any open positions? Or is there anyone I can reach out to better understand the process?

like

How do you keep interview rejections from companies and roles you really want from not breaking your heart? 😭

like
like

Got a Dubai Strategy& Senior Associate interview next week - anyone has tips/recommendations or things I should look out for? Maybe things that are different from the US.

like
like

Anybody interested in casing? BCG interview coming up next week, thanks!

like

Hey does anyone know how to best prep for the Accenture Industry X Anaylsty

Showcase
Scenario
and Strenght Based Interviews.

Thank you

like

Help needed asap! I’ve been applying to Recruitment Coordinator roles for 5 months with no sign of hope. I have a lot of unique experiences on my resume including working at a staffing agency, but no one has given me a chance. I understand that it’s not what you know, but who you know yet the connections I’ve made on LinkedIn have been unable to point me in any fruitful direction. At this point my savings is rapidly depleting and I need a position. Any leads on recruitment/administration roles?

like

Reached out to a recruiter on Linkedin about a role I liked, thought it was far fetched but now they want to schedule a call lol tips for recruiter screening at a boutique IB??

like

Had my second interview for a non legal role at a company in which a legal role just opened. Is there a way to indicate interest for both positions without damaging my chances at both?

like

Does anyone have tips for the structured interview process at a federal agency? I’m trying to transition from impact litigation at a non-profit to an agency focused on trade and consumer protection. I’ve received private sector offers but can’t seem to make it past the first round for federal government. I must have the appropriate credentials to receive an invitation at all and have researched behavioral interview prep—what am I missing?

like

Hi Microsoft Fishes,
I am not getting responses on my applications on jobs in Microsoft.

I have more than 5 years of experience into development with Python and Ruby.

They don't like application of professional worked on these ?

What kind of roles should I apply for at Microsoft?

like

Hello, got invited for Round 1 interview Deloitte consulting in S&O. I wanted to ask how challenging the verbal case was. Any tips as well

like

What does it mean when you apply to a bunch of jobs for which I am a good fit and you hear nothing back for these jobs? For some applications, I'm approaching two weeks since submission. I did get a call back to the first position I applied to; however, after the lab manager saw how much experience I had he said to release me, far too overqualified, tell him he should be applying to Senior Research Associate positions. I have ten years lab experience.

like

Any advice to help prepare for data science analyst role at top consulting firms (McKinsey & Company EY Boston Consulting Group etc)? Any materials, open source platform recommended to take on freelance data science project? When should I start actively looking and applying? I am a new grad who is working in tech as a marketing analyst I’m looking to pivot to marketing& sales data science consulting next year. Would like someone with similar backgrounds offer some practical tips.

like

Do you say you're a "consultant" in your resume? A lot of firms (Deloitte, Protiviti, etc) officially call RA jobs as such, but it feels incredibly lame/misleading to call myself that during a job search when I know we're really just a different kind of auditor...

funnylike

I’m looking to leave and go into an Internal audit position within industry. But It’s been 4+ years since I’ve interviewed for a job. Any tricks and or recommendations

like

More Posts

Anyone have good examples of using video for self promotion? Not work sample reels but more like videos that show agency culture or philosophy? And...do you think that helps biz dev effort?

Traveling after a long-term local project. Trying to decide between points/status with Marriott and Hilton. Cont:

Can someone pls tell the inhand...felt a bit confused about employee pf contribution and lta

Thanks in Advance

Post Photo
like

What are the different shift timings(day/night) in Pwc AC AC (Kolkata) ? What is the shift allowance for the same? Average bonus for 1st year ? Non tech profile

like

Looking for a nice face sunscreen that won’t break the bank and is available in jumbo size! Using a full 1mL per application makes it run out so fast. Opinions?

During meetings, why do some people blurt out the first idiotic thing that comes to mind rather than taking a second to intelligently think through their answer?

like
like

Is dropshipping still profitable in 2020?

like

Mid 30s male, based in SoCal. If any F🐠 want to chat, do reach out 😊

likeuplifting

Is it worth joining TCS on 34 LPA.
YOE: 9Yrs
Tech Stack: Salesforce

like

Has anyone relocated to Pune? I’m confused regarding the office location. And my manager who sits in UK doesn’t have any issue if I continue to WFH

Is hike are record high?

Anybody Joinng in June at pune location?

Hi Fishes,

Yesterday I attended MS hackerrank test and was able to solve some Java based MCQ and one sql query correctly but not able to execute a code with any passed test case so should I expect a call from a recruiter for an interview?

like

Any suggestions on fields and jobs to apply to as a transitioning teacher? I was thinking about getting my Scrum Master certification but open to learn of other certifications or fields that I should be looking at as a transitioning teacher. All feedback is greatly appreciated!
Thanks!

like

I need referals for Pharmacovigilance domain. I have M.Pharma and currently working as assistant professor.

like

Anyone interested in doing another?

like

Any recommendation on learning materials and/or books for a new attorney wanting to learn basics of practicing trademark law ?

I once got in trouble at work for opening mail the wrong way

Post Photo
like

Additional Posts in Data engineers India

Pls DM if interested

Post Photo
like

We are hiring for Azure Data engineers. Dm me if interested in accenture.
Exp - 2.5 years or greater

like

Hi,

I am looking for a job change and any help or refferals are appreciated. I am a data engineer having 2+ yrs of experience in Azure, MSBI Tech stack, Apache Airflow etc.

Preferred location:- Bengaluru, Hyderabad, Pune.

Thanks,
Pranshu Rughani

Hello All, In the next couple of months i am targeting companies like Apple , American express, Salesforce, Microsoft etc. Can anyone please share the required skill set and preparation strategy for these companies? YoE - 4 years Current skill set - Advanced SQL , Pyspark,Azure services, Hadoop ecosystem , shell scripting, Power BI

I am not very good at DSA.

Apple Microsoft Salesforce Amazon

like

Hi All, i got an offer from Infogain India Private Limited and Coforge . The package is same , which one is better. Please suggest.

like

Hey Fishes,

I'm in a biggest confusion here. And its pushing me to depression. Please help me if possible. I got 2 offers and both are good reputed product based companies. And offered the same role.

Fractal Infosys Tata Consultancy Wipro Accenture Microsoft IBM Cognizant

Post Photo
like

Hey Folks,

How can I find churn customers in SQL for a period of one month?

I am assuming it as
Total customers at 1st day of month - Total customers at the last dat of same month
E g 1000 on start day and 2000 on last day would give us Zero churn right?

Can someone help me out with article or videos which explains using SQL

like

Pls DM if interested asap Impetus technologies inc

Post Photo
like

Hi can anyone please help me.
I have a big sql query with almost 9 joins in it. How can I convert these joins into dataframes for faster processing?

like

Hi am azure data engineer with almost 2 years experience. Can u all suggest me any company that hires for this experience with 3 months notice period?

Hi fishes,

Need your opinion.

Working for
Wipro as azure data engineer in Spark, Hive, Azure ADF, ADB etc.

Current CTC: 17.5 LPA

Total YOE: 11 years

Relevant exp in big data: 6 yrs

Relevant exp in Azure: 2+ yrs

Got offer from Atos of 26.4 LPA. Is this a good offer? or Shall I search other job at 30+ LPA?

Getting calls from some product companies like JPMorgan Chase Chubb. How much can I expect from these product companies?

Wipro Infosys Tata Consultancy IBM Capgemini Cognizant Accenture India

like

Hi Fishes,
I have 1.8 yrs Exp and working in the Big data domain and have a few offers please help to decide on the comparatively better option based on salary, Work-life Balance, security, and Carrer Growth.

EY GDS: CTC 12 ( 11.20 Fixed )
Publicis Sapient: 16 CTC ( 14.5 LPA FIXED )
Neudesic (IBM) 16 CTC ( 14.5 FIXED + WFH Remote Complete )
PubMatic: 22.70 CTC + 2 lakhs Joining Bonus ( 16 fixed LPA + Other benifits, stocks, etc )

It will be very helpful if you can suggest with some reason.

like

Hello Everyone, I am currently working as an analyst on a Project which is based only on excel. I want to switch to a Data Engineer role, I have 1 YOE & CTC 7.4 Could you please suggest and guide me on how I can train myself to switch to a Data Engineering Job Profile. I've no idea about the tech used in Data Engineering. I just want to Switch to a tech profile. I'll be more than happy if you guys can guide me through this journey.
Thanks in Advance.

like
like
like

Has anyone given NatWest screening test for big data pyspark?? What kind of questions are there?

like

Do you think freelancing is an option for an Azure Data engineer or moving up heirarchy in corporate is a better option?

Assumptions:-

- Decent communication
- Love to design solutions and have prioir experience (about 4 years)
- Won't mind working hard for the right pay

like