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Hitachi Energy
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I applied via Naukri.com and was interviewed in Jun 2024. There were 3 interview rounds.
Map, reduce, and filter are higher-order functions commonly used in functional programming to manipulate arrays.
Map: Transforms each element in an array based on a provided function.
Reduce: Reduces an array to a single value by applying a function to each element.
Filter: Creates a new array with elements that pass a certain condition.
Closures are functions that have access to variables from their containing scope.
Closures can access variables from their outer function even after the outer function has finished executing.
Closures can be used to create private variables in JavaScript.
Closures are commonly used in event handlers and callbacks.
Redux sagas are middleware libraries for managing side effects in Redux applications.
Redux sagas are used to handle asynchronous actions in Redux, such as API calls or timers.
They are implemented as generator functions that can pause and resume execution.
Redux sagas provide a more structured and testable approach to handling side effects compared to traditional Redux middleware like Thunk.
Common use cases for redux sag...
Function to find sum of array using reduce
Use the reduce method to iterate through the array and accumulate the sum
Convert array elements to numbers before summing them up
Handle edge cases like empty array or non-numeric elements
Example: const array = ['1', '2', '3']; const sum = array.reduce((acc, curr) => acc + Number(curr), 0);
Hitachi Energy is a global technology leader that provides innovative and sustainable energy solutions.
Hitachi Energy offers a wide range of products and services for the energy sector, including grid integration, digital solutions, and consulting services.
The company focuses on creating a more sustainable energy future through its advanced technologies and expertise.
Hitachi Energy is known for its commitment to innova...
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I appeared for an interview in Sep 2017.
I applied via Naukri.com and was interviewed before Sep 2022. There were 2 interview rounds.
The main difference between .NET and .NET Core is that .NET Core is a cross-platform, open-source framework while .NET is a Windows-only framework.
NET Core is cross-platform, meaning it can run on Windows, macOS, and Linux, while .NET is limited to Windows.
.NET Core is open-source, allowing for community contributions and faster updates, while .NET is primarily developed by Microsoft.
.NET Core is modular, allowing deve...
Functions return a single value, while stored procedures can perform multiple operations and return multiple values.
Functions return a single value, while stored procedures can return multiple values.
Functions are called in SQL statements, while stored procedures are called using the EXECUTE command.
Functions cannot modify the database state, while stored procedures can.
Functions are precompiled and stored in the datab...
I applied via Referral and was interviewed in May 2024. There was 1 interview round.
20 min - 20 questions
I applied via Referral and was interviewed before Mar 2020. There were 3 interview rounds.
posted on 27 Mar 2025
I appeared for an interview in Feb 2025, where I was asked the following questions.
I specialize in full-stack development, focusing on JavaScript frameworks, cloud computing, and agile methodologies.
Proficient in JavaScript frameworks like React and Angular for building dynamic user interfaces.
Experienced in backend development using Node.js and Express, enabling seamless API integration.
Skilled in cloud services such as AWS and Azure, optimizing application deployment and scalability.
Familiar with a...
I applied via Recruitment Consultant and was interviewed in Mar 2021. There were 3 interview rounds.
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.
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.
I applied via Campus Placement and was interviewed before Aug 2023. There were 2 interview rounds.
I am a software engineer with 5 years of experience in developing web applications using Java, Spring, and Angular.
5 years of experience in software development
Proficient in Java, Spring, and Angular
Strong problem-solving skills
Experience working in Agile development environment
I appeared for an interview before Feb 2024.
Object oriented programming is a programming paradigm based on the concept of objects, which can contain data and code.
Encapsulation: bundling data and methods that operate on the data into a single unit (object)
Inheritance: allows a class to inherit properties and behavior from another class
Polymorphism: ability for objects to be treated as instances of their parent class or as instances of their own class
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