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Loyalytics Data Engineer Interview Questions, Process, and Tips
Loyalytics Data Engineer Interview Experiences
1 interview found
Soundarya Nachimuthu
(2 Questions)
- Q1. What is Union All in SQL and how it works?
- Ans.
Union All in SQL is used to combine the result sets of two or more SELECT statements, including duplicate rows.
Union All is used to combine the results of multiple SELECT statements into a single result set.
It includes all rows from each SELECT statement, even if there are duplicate rows.
The number of columns and data types must be the same in all SELECT statements being combined.
Example: SELECT column1 FROM table1 UNI
- Q2. What is ETL and ELT?
- Ans.
ETL stands for Extract, Transform, Load and ELT stands for Extract, Load, Transform.
ETL involves extracting data from various sources, transforming it to fit into a target schema, and loading it into a data warehouse.
ELT involves extracting data, loading it into a target system, and then transforming it as needed within the target system.
ETL is commonly used in traditional data warehousing scenarios, while ELT is often...
(2 Questions)
- Q1. How does Union all works with a given scenario?
- Ans.
Union all combines the results of two or more SELECT statements into a single result set.
Union all is used to combine the results of multiple SELECT statements into a single result set.
It includes all rows from each SELECT statement, even if there are duplicates.
The number of columns and data types must be the same in all SELECT statements.
Example: SELECT column1 FROM table1 UNION ALL SELECT column1 FROM table2;
Example...
- Q2. Python code to merge 3 columns and rows.
- Ans.
Python code to merge 3 columns and rows in a dataframe.
Use the pandas library in Python to work with dataframes.
Use the concat() function to merge columns and rows.
Specify the axis parameter as 1 to merge columns.
Skills evaluated in this interview
Data Engineer Jobs at Loyalytics
Interview questions from similar companies
Anonymous
Interview Questionnaire
3 Questions
- Q1. About my self and my experience.
- Q2. What's the reason for leaving previous job?
- Q3. Technical question depends on process.
I applied via Walk-in and was interviewed before Jun 2020. There was 1 interview round.
Interview Questionnaire
1 Question
- Q1. Da tools
Interview Preparation Tips
I applied via Company Website and was interviewed before Jun 2020. There were 4 interview rounds.
Interview Questionnaire
2 Questions
- Q1. Python data structures
- Q2. MongoDB database algorithms
- Ans.
MongoDB database algorithms are used for efficient data storage, retrieval, and processing.
MongoDB uses various algorithms for indexing, sharding, and aggregation.
Indexing algorithms include B-tree, hash, and text search indexes.
Sharding algorithms include range-based, hash-based, and zone-based sharding.
Aggregation algorithms include map-reduce and aggregation pipeline.
MongoDB also uses algorithms for query optimizati
Interview Preparation Tips
Skills evaluated in this interview
I appeared for an interview before Dec 2020.
(1 Question)
Round duration - 120 Minutes
Round difficulty - Medium
- Q1.
Ninja and His Secret Information Encoding Problem
Ninja, a new member of the FBI, has acquired some 'SECRET_INFORMATION' that he needs to share with his team. To ensure security against hackers, Ninja dec...
- Ans.
The task is to encode and decode 'SECRET_INFORMATION' for security purposes and determine if the transmission was successful.
Read the number of test cases 'T'
For each test case, encode the 'SECRET_INFORMATION' and then decode it
Compare the decoded string with the original 'SECRET_INFORMATION'
Print 'Transmission successful' if they match, else print 'Transmission failed'
(1 Question)
Round duration - 60 Minutes
Round difficulty - Medium
- Q1.
Equilibrium Index Problem Statement
Given an array
Arrconsisting of N integers, your task is to find the equilibrium index of the array.An index is considered as an equilibrium index if the sum of elem...
- Ans.
Find the equilibrium index of an array where sum of elements on left equals sum on right.
Iterate through the array and calculate prefix sum and suffix sum at each index.
Compare prefix sum and suffix sum to find equilibrium index.
Return the left-most equilibrium index or -1 if none found.
Round duration - 50 Minutes
Round difficulty - Easy
Interview Preparation Tips
Tip 1 : Focus more on SQL
Tip 2 : Keep up with ongoing projects in the company
Tip 1 : Be honest about what you add.
Tip 2 : Don't forget to mention extra curriculars.
Skills evaluated in this interview
I appeared for an interview in Aug 2017.
Interview Preparation Tips
Experience: every one put their views
Tips: just tell anything. no one listen
Duration: 5 minutes
Round: Test
Experience: online test
Tips: do those question which can be solved without usingpen paper first
Duration: 5 minutes
Total Questions: 50
Skills: Relieving Pressure
I appeared for an interview in Sep 2016.
Interview Questionnaire
2 Questions
- Q1. Behavioral questions, what will you choose knowledge or money?Why?, etc . Other curricular activities that showcase your managerial skills, etc
- Q2. Focused on projects from resume and cross questioning. Can ask you about the tools or languages related questions if you have added that to CV. Followed by guesstimates where you will have to provide detai...
Interview Preparation Tips
Tips: It is advantageous if you have prior experience with data handling tools eg advanced EXCEL , SPSS
I appeared for an interview before Nov 2016.
Interview Preparation Tips
Experience: Only Written
Duration: 1 hour 45 minutes
Total Questions: 100
Skills: Proficiency In English, Basic concepts of computer, Commerce background with 50%
I applied via Walk-in and was interviewed before Feb 2021. There were 4 interview rounds.
(1 Question)
- Q1. Scenario based question SQL questions advanced Excel questions like v lookup h lookup
(1 Question)
- Q1. About the project complete description of the project what we have done and how
(5 Questions)
- Q1. Why should we hire you?
- Q2. Why are you looking for a change?
- Q3. What are your strengths and weaknesses?
- Q4. Tell me about yourself.
- Q5. What are your salary expectations?
Interview Preparation Tips
I appeared for an interview before Nov 2019.
Interview Questionnaire
4 Questions
- Q1. How do you know about this company?
- Q2. I have research about this company from various ways and collect a good bunch of information and decided to hire job from this company.
- Q3. In which skill you are fit to perfect?
- Q4. Well, iam a quick learner i grab new things at early stage i like to learn new things and perfection is my desire i try to get learn fast and getting knowledge is my aim.
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Loyalytics Data Engineer Interview Process
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Loyalytics Data Engineer Reviews and Ratings
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Rating in categories
2-4 Yrs
₹ 10.06-15 LPA
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