Hitachi Digital Services Interview Questions and Answers

Q1. I give you 3 in input output should be 14, I give you 4 in input output should be 30
Ans. 
The output is calculated using a mathematical formula based on the input number.
• The formula to calculate the output is: output = (input^2) + (input * 2)

• For example, for input 3: output = (3^2) + (3 * 2) = 9 + 6 = 15

• For example, for input 4: output = (4^2) + (4 * 2) = 16 + 8 = 24
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Q2. What is goroutine?
Ans. 
Goroutine is a lightweight thread of execution that allows concurrent programming in Go.
• Goroutines are functions or methods that run concurrently with other goroutines.

• They are managed by the Go runtime and have their own stack space.

• Goroutines are more efficient than traditional threads and can be created easily using the 'go' keyword.

• They communicate with each other using channels, which are built-in data structures ...read more
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Q3. Write program in Go include goroutine channel and wg
Ans. 
A program in Go that demonstrates the use of goroutines, channels, and a wait group.
• Create a goroutine that performs a task concurrently.

• Use channels to communicate between goroutines.

• Use a wait group to synchronize the completion of goroutines.

• Example: Calculate the sum of numbers using multiple goroutines and a channel.
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Q4. Provide alternative for time.Sleep()
Ans. 
time.Ticker is an alternative for time.Sleep() to create a repeating timer.
• Use time.Ticker to create a ticker that ticks at regular intervals.

• Use the ticker's C channel to receive the ticks.

• Stop the ticker when done using the Stop() method.
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Q1. Questions on Java 8 and multithreading
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Q2. Defaalt methods
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Q3. Functional interfaces
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Q4. Streams and Lambdas
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Q1. Managerial interview. Scenario based questions around microservices and patterns.
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Based on sql queries my sql questions

Q1. Based on data governance
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Q2. Based in data quality rules
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Q1. Salary negotations
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Q2. Other questions
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Q1. Why apply to Hitachi Vantara?
Ans. 
Hitachi Vantara offers cutting-edge technology solutions and a collaborative work environment.
• Hitachi Vantara is a global leader in digital transformation and innovation.

• The company values teamwork and encourages professional growth and development.

• I am impressed by Hitachi Vantara's commitment to sustainability and social responsibility.
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Q2. Tell me about your yourself and experience?
Ans. 
I am a recent graduate with a degree in Computer Science and experience in developing web applications using Java and JavaScript.
• Recent graduate with a degree in Computer Science

• Experience in developing web applications using Java and JavaScript

• Familiar with software development best practices
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2nd round was given an assignment to complete within an hour receive by email and send to the email.
Use OOP principles to write code in C++. Read some structured text from file then print it in certain format they provided. Write thinking about more of quality rather than solving the problem.

Q1. Explain the assignment code submitted in 2nd round. Go through all the code and explain the code thoroughly.
Ans. 
A detailed explanation of the assignment code submitted in the second round interview.
• The code initializes an array of integers and calculates the sum. Example: int[] numbers = {1, 2, 3}; int sum = 0;

• It includes a function to find the maximum value in the array. Example: int max = findMax(numbers);

• The code implements error handling for invalid inputs using try-catch blocks. Example: try { ... } catch (Exception e) { .....read more
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Q2. How differently would you write the assignment now?
Ans. 
I would approach the assignment with a better understanding of software design principles and best practices.
• I would focus on modularizing the code into smaller, reusable components

• I would pay more attention to error handling and edge cases

• I would write more comprehensive unit tests to ensure code quality

• I would consider scalability and performance optimizations in my design
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Q3. Answer questions from given sheet of C++ questions, about 5-8 questions related to OOP, then from the given coding find the error, tell what the code does. last coding questions were not junior level, if a...read more
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Q4. Answer the question about Python, tell difference between of tuple and list, if accessed out of bound vector element what's the result? what's ABC class? Again felt like exam rather than interview. and ver...read more
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Q5. Let's go through CV again, and judged the CV experience and sections, saying "Looks like you have SOME experience in the past". After such sentence I felt anger towards them, not polite at all.
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