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Jaya Sai Solar Energy Senior Database Developer Interview Questions and Answers
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Anonymous
Selected
I applied via Naukri.com and was interviewed in Jun 2024. There were 3 interview rounds.
(5 Questions)
- Q1. About virtual DOM and it's implementation
- 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.
- Q3. Closures and their implementation
- Ans.
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.
- 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...
- Q5. Basic javascript output questions
(3 Questions)
- 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);
- Q2. About form validation techniques
- Q3. UseCallback and useMemo
(2 Questions)
- 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...
- Q2. Why do you want to join only Hitachi energy.
Interview Preparation Tips
Skills evaluated in this interview
Coding with UML diagrams
(2 Questions)
- Q1. C++ Question related to pointers
- Q2. C++ problem solving
(1 Question)
- Q1. C++ problem solving.
(1 Question)
- Q1. Managerial round with some problem solving.
(2 Questions)
- Q1. Salary discussion.
- Q2. Joining date confirmation.
Coding round with 1 medium qun
(2 Questions)
- Q1. Why string is immutable
- Ans.
String is immutable in Java to ensure security, thread safety, and optimization.
Immutable strings are thread-safe as they cannot be modified concurrently by multiple threads.
String pooling allows Java to reuse common string literals, improving memory efficiency.
Immutable strings prevent accidental changes, ensuring data integrity and security.
- Q2. Method name in Function FI
- Ans.
The method name in a Functional Interface (FI) is the name of the abstract method defined in the interface.
The method name in a Functional Interface is the name of the single abstract method defined in the interface.
For example, in the Functional Interface 'Runnable', the method name is 'run'.
The method name is used to implement the functional interface using lambda expressions.
I applied via Referral and was interviewed in May 2024. There was 1 interview round.
20 min - 20 questions
C++ coding question with UML diagram
(1 Question)
- Q1. Problem solving question
(1 Question)
- Q1. Problem solving question
(1 Question)
- Q1. About salary discussion and notice period
Interview Preparation Tips
Selected
I applied via Naukri.com and was interviewed before Sep 2022. There were 2 interview rounds.
(2 Questions)
- Q1. What is the difference between .net and .net core?
- Ans.
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...
- Q2. What is the difference between function and stored procedure?
- Ans.
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 was interviewed in Sep 2017.
Interview Questionnaire
3 Questions
- Q1. Basic questions : Lift desiging , probability and normal questions based on arrays and string. Resume overview.
- Q2. OOPs, BigData , basic C++ and other stuff was asked.
- Q3. Talked about yourself. Strengths , weaknesses about your life and other future perspective.
Interview Preparation Tips
Experience: No basic criteria. CG matters
Tips: CG matters
Round: Test
Experience: 16 quantitative(16mins) + 14 logical(14mins) + 22 english(18mins) + 12 questions based on C++C, OOPs(15 mins) + 2Coding questions(very simple based on arrays and mathematics like prime numbers, permutations, string balancing)
Tips: Platform : amcat , try to give mock tests on amcat to boost up your speed and try to attempt atleast one coding question.
Duration: 1 hour 50 minutes
Total Questions: 66
Skills: Logical Reasoning, LOGICAL THINKING ABILITIES, Object Oriented Programming (OOP) Basics, Confidence, Probabiity, Data Strrutures, Strings
College Name: IIT Roorkee
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