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GfK MODE
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GfK MODE Data Engineer Interview Questions, Process, and Tips
GfK MODE Data Engineer Interview Experiences
1 interview found
Anonymous
I applied via Referral and was interviewed in Sep 2024. There were 2 interview rounds.
(2 Questions)
- Q1. What is coalesce
- Ans.
Coalesce is a function used to return the first non-null value in a list of expressions.
Coalesce function is commonly used in SQL to handle null values.
It takes multiple arguments and returns the first non-null value.
Example: COALESCE(column1, column2, 'default') will return the value of column1 if not null, else column2, and if both are null, it will return 'default'.
- Q2. What is repartition
- Ans.
Repartition is the process of redistributing data across partitions in a distributed system.
Repartitioning helps in balancing the workload and improving performance in distributed computing environments.
It involves moving data between partitions based on certain criteria such as key values or hash functions.
Repartitioning can be done in Spark using operations like repartition() or coalesce().
(2 Questions)
- Q1. Non repeatable character
- Ans.
A non repeatable character is a character that appears only once in a given string.
Iterate through the string and count the frequency of each character
Identify the characters that have a frequency of 1
Return the first non repeatable character found
- Q2. Sort list without sort method
- Ans.
Sort list without using sort method
Create a custom sorting function using loops
Compare each element with every other element to determine the correct order
Swap elements based on the comparison results
Skills evaluated in this interview
Interview questions from similar companies
I appeared for an interview in Jul 2017.
Interview Questionnaire
3 Questions
- Q1. Tell me about yourself?
- Ans.
I am a data analyst with a strong background in statistics and programming.
I have a Bachelor's degree in Statistics and have completed several courses in programming languages like Python and SQL.
I have experience working with large datasets and conducting data analysis using statistical techniques.
I am proficient in data visualization tools like Tableau and have created interactive dashboards to present insights.
I hav...
- Q2. Why this company?
- Ans.
I am interested in this company because of its strong reputation in the data analytics industry and its commitment to innovation.
The company has a proven track record of success in the data analytics industry.
It has a strong reputation for delivering high-quality insights and solutions.
The company values innovation and encourages employees to think creatively.
There are opportunities for professional growth and developm...
- Q3. Why do you want to make a career in this field inspite being an engineer?
- Ans.
I am passionate about using data to solve complex problems and make informed decisions.
Data analysis allows me to apply my analytical skills and engineering background to extract valuable insights from data.
I enjoy working with numbers, statistics, and programming, which are all essential skills in the field of data analysis.
Data analysis offers a wide range of opportunities to work on diverse projects and industries, ...
Interview Preparation Tips
Experience: The written test consists of 2 sections. First section is of verbal reasoning which is very easy. And second section consists of data interpretation, quant questions.
Tips: Speed and accuracy are important in this test. Daily practicing of aptitude can get you through the exam.
Duration: 45 minutes
Total Questions: 40
Round: Technical + HR Interview
Experience: After entering the interview room, the first question asked to me was "Walk me through your CV ".After that, I was asked some puzzle questions, one math question and a case study question which was bit difficult. The interviewer was trying to make me stressed by picking one of my strengths and saying that he considers it as my weakness. He was not convinced with whatever I said but in order to overcome above stress be clam and cool. Say what you know without hesitation, be strong, and be yourself. Last but not the least, don't bluff because he will eventually figure it out, even if you bluff say it convincingly.
Tips: Be perfect about what you have written in your CV and just be yourself.
Round: HR Interview
Experience: HR round was very cool . Actually the panel was friendly with me. They asked some common HR questions. That's it about this round.
Tips: Be fluent and develop good communication skills.
College Name: NIT Bhopal
I applied via Job Portal and was interviewed before Nov 2020. There were 3 interview rounds.
Interview Questionnaire
1 Question
- Q1. I was asked about SQL,java excel and tableau questions
Interview Preparation Tips
I applied via Walk-in and was interviewed before Jun 2021. There were 2 interview rounds.
(1 Question)
- Q1. What is EPS? Why balance sheet always match?
- Ans.
EPS stands for Earnings Per Share. Balance sheet always matches due to the fundamental accounting equation.
EPS is a financial metric that measures the profit earned by a company per outstanding share of common stock.
It is calculated by dividing the net income of the company by the total number of outstanding shares.
Balance sheet always matches because of the fundamental accounting equation which states that assets must...
(1 Question)
- Q1. What is depreciation and amortization?
- Ans.
Depreciation and amortization are accounting methods used to allocate the cost of assets over their useful lives.
Depreciation is the allocation of the cost of tangible assets, such as buildings or equipment, over their useful lives.
Amortization is the allocation of the cost of intangible assets, such as patents or copyrights, over their useful lives.
Both depreciation and amortization are non-cash expenses that reduce t...
Interview Preparation Tips
- Accounting principles
I applied via Recruitment Consultant and was interviewed before Nov 2020. There was 1 interview round.
Interview Questionnaire
2 Questions
- Q1. Python programming questions
- Q2. Custom Exceptional Handling
Interview Preparation Tips
I applied via Naukri.com
Interview Questionnaire
1 Question
- Q1. About education qualification. Experience, knowledge about the position.
Interview Preparation Tips
Interview Preparation Tips
I applied via Recruitment Consulltant and was interviewed in Feb 2023. There were 3 interview rounds.
A problem solving aptitude game based test which is also known as pymetric test.
(2 Questions)
- Q1. 1. Basic question about yourself
- Q2. 2. Related to domain
Interview Preparation Tips
Be honest
Show recruiters a learning attitude
Selected
I applied via Campus Placement and was interviewed before May 2023. There were 2 interview rounds.
Py and big data general questions
(2 Questions)
- Q1. Quiz questions was asked
- Q2. Tell me about yourself
I applied via Referral and was interviewed before May 2022. There were 3 interview rounds.
There was around 6-7 query to write
Requires good SQL query skills
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