Siemens Energy Mern Full Stack Developer Interview Questions and Answers

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...read more

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...read more

PV solar refers to photovoltaic solar technology, which converts sunlight into electricity using solar panels.

• PV solar technology uses solar panels made of photovoltaic cells to convert sunlight into electricity.

• The rejection rate of cells by a company can vary depending on the quality control measures in place.

• Topcon Technology is a solar cell manufacturing technique that involves creating a thin layer of semiconducto...read more

The salary structure of my current role is competitive and includes a base salary, performance bonuses, and benefits.

• My current role has a base salary that is determined based on my experience and qualifications.

• In addition to the base salary, I have the opportunity to earn performance bonuses based on my individual and team achievements.

• I also receive benefits such as health insurance, retirement plans, and paid time ...read more

My notice period in my last company was 30 days.

• Notice period in my last company was 30 days

• I had to serve the full notice period before joining a new company

• During the notice period, I completed all pending tasks and handed over my responsibilities to my team members

• I ensured a smooth transition by documenting important information and providing necessary training to my colleagues