Tenaga Nasional Berhad Interview Questions and Answers

Q1. Tell me about yourself
Ans. Starting from curriculum to end up with experience and some small personal details in between
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Q2. Where do you see yourself in next 5 year
Ans. Look at the company hierarchy and look at yourself as growth perspective.
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Q1. Related questions my job
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Manager related

There were a total of 60 technical questions asked

Q1. Interview questions asked were related to both HR and Technical
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Q1. Technical questions related to electrical engineering
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Q2. Domain related questions
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Q1. Tell me about yourself? PowerBI, SQL, work experience, Data mining,data profiling, power query power pivot, next 5 years
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Q1. What are your salary expectations?
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Q2. Share details of your previous job.
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Q3. Tell me about yourself.
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Q1. 1.Why did you apply for this position? 2.What did you do in your previous job? (in great detail) 3.Some statistics questions 4.Short presentation (<5 min) about one topic (one slide)
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Q1. About virtual DOM and it's implementation
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Q2. Implementation of map, reduce, filter
Ans. 
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
Ans. 
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.
Ans. 
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
Ans. 
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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Coding with UML diagrams

Q1. C++ Question related to pointers
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Q2. C++ problem solving
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Q1. C++ problem solving.
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Q1. Managerial round with some problem solving.
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Q1. Salary discussion.
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Q2. Joining date confirmation.
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