Hitachi Digital Services Senior Developer Interview Questions and Answers

Q1. Core java, advanced java, spring boot, Hibernate, database
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Q2. Design pattern, previous project experience
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Python code for solving a string usecase using stack, SQL join and groupby queries

Q1. React theory questions, and 1 problem
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Q2. React and web theory questions on lifecycle methods
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Q1. General family background
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Q2. CTC discussion for current and expected
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Q1. Java 8 question about Strings.
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Q1. Diff between JDK,JVM,JRE. Equals and HashCode
Ans. 
JDK is a development kit, JRE is a runtime environment, and JVM is a virtual machine. Equals compares object values, HashCode returns a unique integer for an object.
• JDK includes JRE and development tools, while JRE includes JVM and necessary libraries

• JVM is responsible for executing Java bytecode

• Equals method compares the values of two objects, while == compares their references

• HashCode method returns a unique integer ...read more
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Q1. Given 2 Nodes 1->9 ->0 1->0 Add both of them so resulting node would be 2->0->0 190 +10 = 200 Java 8 questions
Ans. 
Add two linked lists representing numbers and return the resulting linked list.
• Traverse both linked lists and add the corresponding digits, keeping track of carry.

• Create a new node for each digit and update the carry for the next iteration.

• If one list is longer than the other, add the remaining digits to the result.

• Handle the case where the carry is not zero after all digits have been added.

• Time complexity: O(max(m,n))...read more
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Q1. Salary Expectations about the job
Ans. 
I expect a competitive salary based on my experience, skills, and the responsibilities of the role.
• I have extensive experience in senior developer roles and have consistently delivered high-quality work.

• I have a strong understanding of various programming languages and frameworks.

• I have successfully led and mentored teams in previous positions.

• I am confident in my ability to contribute to the success of the company.

• I a...read more
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Q1. Basic core java questions, spring boot and spring mvc questions and other project related questions
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Q1. Project related questions and infrastructure of application
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Q1. Salary negotiation, company policy explanation
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Q1. Mvvm, oops, broadcast receiver, activity life cycle, aidl
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Q1. Project experience,
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Q1. Discussion of salary
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Questions based on full stack

Q1. It went well, the interviewer was quite friendly
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