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Hitachi Energy
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Hitachi Energy Data Engineer Interview Questions and Answers
Hitachi Energy Data Engineer Interview Experiences
1 interview found
navin k
(3 Questions)
- Q1. Difference between ADF and synapse in Azure
- Ans.
ADF is a cloud-based data integration service while Synapse is an analytics service that brings together big data and data warehousing.
ADF is used for data integration and orchestration tasks, while Synapse is used for big data analytics and data warehousing
ADF allows you to create data pipelines to move and transform data, while Synapse provides a unified experience for data preparation, data management, data warehous...
- Q2. What RDD & why
- Ans.
RDD stands for Resilient Distributed Dataset, a fundamental data structure in Apache Spark.
RDD is a fault-tolerant collection of elements that can be operated on in parallel.
RDDs are immutable, meaning they cannot be changed once created.
RDDs support two types of operations: transformations (creating a new RDD from an existing one) and actions (returning a value to the driver program).
- Q3. What SCD1 and SCD2
- Ans.
SCD1 and SCD2 are types of slowly changing dimensions used in data warehousing.
SCD1 (Type 1): Overwrites old data with new data, losing historical information.
SCD2 (Type 2): Keeps track of historical data by creating new records for changes.
SCD1 is simpler and faster, while SCD2 provides more detailed historical information.
Example: SCD1 would update a customer's address directly, while SCD2 would create a new record w...
Skills evaluated in this interview
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Anonymous
I applied via Shine and was interviewed in Mar 2024. There was 1 interview round.
(5 Questions)
- Q1. SQL MongoDB Postgress MySQL
- Q2. What is MySQL and its responsibilities?
- Ans.
MySQL is a popular open-source relational database management system.
MySQL is used for storing and managing data in a structured format.
It allows users to create, read, update, and delete data using SQL queries.
MySQL is commonly used in web applications to store user information, product data, and more.
It supports features like transactions, indexing, and replication for data consistency and reliability.
- Q3. What is SQL and its main role as db engg.?
- Ans.
SQL is a programming language used for managing and querying relational databases.
SQL stands for Structured Query Language
Main role is to interact with databases by querying, updating, and managing data
Used to create, retrieve, update, and delete data in relational databases
Allows for data manipulation, data definition, and data control operations
Examples include SELECT, INSERT, UPDATE, DELETE statements
- Q4. What is mongoDB ?
- Ans.
mongoDB is a popular NoSQL database management system.
NoSQL database
Document-oriented
Scalable and flexible
Supports dynamic schemas
Used for handling large volumes of data
- Q5. What is postgress?
- Ans.
PostgreSQL is an open-source relational database management system known for its robustness and extensibility.
PostgreSQL is commonly referred to as Postgres.
It is known for its ACID compliance, extensibility, and support for various data types.
PostgreSQL supports SQL and JSON querying, as well as various programming languages for stored procedures.
It is widely used in enterprise applications and web development.
Example...
Skills evaluated in this interview
(2 Questions)
- Q1. What is Helm chart?
- Q2. What does automated build check for
Easy and medium porblems are asked
Easy and medium problem are asked
(2 Questions)
- Q1. Easy for yourself
- Q2. Your family bg
kiran pokharkar
(3 Questions)
- Q1. Just half hour interview Oops concept
- Q2. . Net and angular basics
- Q3. Project in details
(3 Questions)
- Q1. What if team is not supporting you
- Q2. Manager is not agree
- Q3. 5 year your goals
I applied via Naukri.com
(1 Question)
- Q1. Sir i want to apply for job in your company
Interview Preparation Tips
- Current Job
Selected
I applied via Company Website and was interviewed before Sep 2022. There were 2 interview rounds.
(6 Questions)
- Q1. What does siemens-energy do?
- Ans.
Siemens Energy is a global energy technology company providing solutions for sustainable energy generation, transmission, and distribution.
Siemens Energy offers products and services for power generation, transmission, and distribution
They focus on sustainable energy solutions such as wind power, gas turbines, and grid technology
The company also provides digital solutions for energy management and optimization
Siemens E...
- Q2. Technical knowledge about compressors
- Q3. 3D modelling in Nx, solidworks, E3D,...
- Ans.
3D modelling software like Nx, Solidworks, and E3D are commonly used in engineering for designing and visualizing complex systems.
3D modelling software like Nx, Solidworks, and E3D are used for creating detailed 3D models of mechanical components and systems.
These software tools allow engineers to simulate and analyze the behavior of their designs before manufacturing.
They are essential for designing products in indust...
- Q4. P&ID, piping iso & BOM related questions
- Q5. SAP ERP knowledge
- Q6. Valves, expansion joints, bellows, noise hood, pressure vessels, intercoolers, LOS , Separator, volume bottle, etc. Design knowledge related questions
Interview Preparation Tips
Skills evaluated in this interview
I applied via Naukri.com and was interviewed in May 2021. There were 4 interview rounds.
Interview Questionnaire
1 Question
- Q1. Coding questions,basic python questions
Interview Preparation Tips
I applied via Referral and was interviewed in Sep 2023. There were 4 interview rounds.
There are more the 10 people in the group discussion round i was selected one of them
(2 Questions)
- Q1. They asked about azure data factory, azure databricks, azure technology
- Q2. What is azure data factory
- Ans.
Azure Data Factory is a cloud-based data integration service that allows you to create, schedule, and manage data pipelines.
Azure Data Factory is used to move and transform data from various sources to destinations.
It supports data integration and orchestration of workflows.
You can create data pipelines using a visual interface or code.
It integrates with various data sources like Azure Blob Storage, SQL Database, and m
(1 Question)
- Q1. They asked about my college project
Skills evaluated in this interview
Pavan Kumar
I applied via Recruitment Consultant and was interviewed in Mar 2021. There were 3 interview rounds.
Interview Questionnaire
4 Questions
- Q1. 1. Coding question on max sum of subsequence ?
- Q2. 2. Coding in question of finding number with most frequency when input array size is ~ 1M.
- Ans.
Finding number with most frequency in 1M size array of strings.
Use a hash table to store the frequency of each number.
Iterate through the array and update the frequency in the hash table.
Find the number with the highest frequency in the hash table.
- Q3. 3. Find lenght of linked list in single iteration.
- Ans.
To find length of linked list in single iteration, use two pointers and traverse the list until the end.
Use two pointers, one moving one node at a time and the other moving two nodes at a time.
Traverse the list until the end is reached.
The number of iterations taken by the faster pointer to reach the end is the length of the linked list.
- Q4. In dept of Cassandra, Applciation performance improvement, troubleshooting.
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Hitachi Energy Data Engineer Interview Process
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