Siemens Energy Senior Engineer Mechanical Interview Questions and Answers

Q1. Related to previous job questions
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Q1. About virtual DOM and it's implementation
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Q2. Implementation of map, reduce, filter
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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.
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Q3. Closures and their implementation
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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.
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Q4. Redux sagas and their practical use cases
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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
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Q5. Basic javascript output questions
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Q1. Write a function to find the sum of the array using reduce.
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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);
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Q2. About form validation techniques
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Q3. UseCallback and useMemo
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Q1. What do you know about Hitachi energy
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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
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Q2. Why do you want to join only Hitachi energy.
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Q1. Technical questions related to electrical engineering
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Q2. Domain related questions
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20 min - 20 questions

Q1. Asset management process
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Q2. Per MW cost with rational?
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Per MW cost with rational refers to the cost of generating one megawatt of electricity with a logical and reasonable approach.
• Per MW cost with rational is calculated by taking into account all the expenses incurred in generating one megawatt of electricity.

• This includes the cost of fuel, maintenance, labor, and other operational expenses.

• The cost can vary depending on the type of power plant, fuel source, and location.

• ...read more
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Q1. Case study, operation excellence,
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Q1. Mining Previous experience dewatering shift operations
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