The coding challenge is a foundation of a technical interview in software engineering, data engineering, or even data science. Almost all job interviews I have seen or experienced in the market require you to pass several coding challenges to prove that you have sufficient problem-solving skills.
Of course, there are many arguments whether the coding challenge is a proper tool to evaluate your professional skill sets. However, it’s still a standard that you need to be familiar with and master it to land your dream job in tech.
One problem I experienced during the coding interview preparation is that the…
Data engineering is an essential field in the data industry. There are a lot of needed activities dealing with data so that we can gain a data-driven decision. The examples could be
The demand for data engineering continues growing every day.
As a data enthusiast in this field, I thought this is a valuable skill that anyone…
Recently, I have been working on building a data pipeline to transfer the data from a relational database management system (RDBMS) to the Hadoop ecosystem (HDFS). With limited time resources, I have to finish the data pipeline within seven days from scratch. Also, I got the suggestion that it should complete the entire thing within three days.
At that point in time, my knowledge about the Hadoop ecosystem configuration and docker was nearly nothing. I know the concept of what a distributed system is, but to configure it by myself was almost impossible. It is easier to scare from what…
Reporting is the foundation of any business. In daily life, you somehow have to ingest the new data from a report to decide where to go next every day. The report can come in various formats such as Microsoft Excel, Web application, or exporting from an enterprise resource planning system (ERP).
I have recently got a request to build a dashboard that replicates the business number in the crafted report. The finance team manually created this report monthly. The most tedious process is to export the source files from the SAP system and manually place it in excel. …
As a data scientist/analyst, your job is to produce a report that contained many insights for business decisions. A report can be made by several useful tools such as Microsoft Excel, SAP, or customized with the programing language such as SAS, R, or Python. The result can be sent through internal email to a stakeholder or publish through the centralized dashboard.
Like everyone else, I am a data analyst who uses python for making a report or presentation in daily life. My usual assignment is to make an ad-hoc analysis within 2–3 hours to present to the management team.
We all have limited time in our life.
24 hours a day is relatively short if you have many things to achieve. We all dream about a productive life to get whatever we want to be done with ease.
However, life is not that easy and sends so many distractions to you, especially in 2020.
We all have social media, entertainment platform, online publications, etc., in our hands.
We can spend a day on it without bored. This is quite a difference compared to ten to twenty years ago.
The more time we spend on those distractions, the less number…
Machine learning pipeline is an essential part of data application. We build it to transform the raw data into an insightful prediction. The pipeline contains many steps such as data ingestion, data preprocessing, feature engineering, model fitting, and performance evaluation.
When data scientists start developing the ML pipeline, they try to build the whole pipeline fast and re-iterate the process by changing some hyper-parameter to get the best result. There are many hyper-parameters to tweak in this process.
It would be best if we can track the variation of those hyper-parameters. We will gain a deeper understanding of our ML…
Learning new trends from watching Korean Netflix’s series.
Spoiler alert: this article may contain information about this drama. Please feel free to skip it first if you have not watched it yet. But, if you don’t mind, let’s dive in!
Recently, I have watched the Netflix series called STARTUP. It’s a Korean drama that is on-air every SAT and SUN at 9 PM. The story is about a group of people who dream of establishing a startup business on their own.
Seem straightforward and not interested, right?
But, the exciting part is that the main character of this series is…
Data analytics, science, and engineering have grown much popularity in the last few years. It creates a new standard for the industry. Every company needs to invest or establish a data office within their organization.
It becomes standard in 2020 that you can have a prediction model for marketing leads, improving your check-in method with facial recognition., or looking at the elegant dashboard for making a business decision.
Exceptional use cases always come first to build the momentum of the analytics trend. Executives want to see a result before investing a massive amount of funds into a new direction.