Hitachi Interview Questions and Answers

There were 4 sections and first one was quant, second one was logical, third was English and finally 3 coding questions in last section

4 codes and 5 technical questions

Q1. Explain multi threading
Ans. 
Multi threading is the ability of a CPU to execute multiple threads concurrently.
• Allows for parallel execution of tasks, improving performance

• Each thread has its own stack and runs independently

• Threads can communicate and synchronize using shared memory

• Examples: running multiple tasks simultaneously in a web server, processing data in parallel
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Q2. What is polymorphism
Ans. 
Polymorphism is the ability of a single function or method to operate on different types of data.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• It enables a single interface to be used for different data types.

• Examples include method overloading and method overriding in object-oriented programming.
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Q3. Diff b/w inner and outer joins
Ans. 
Inner join returns only the rows that have matching values in both tables, while outer join returns all rows from both tables.
• Inner join: returns rows with matching values in both tables

• Outer join: returns all rows from both tables, with NULL values where there is no match

• Example: Inner join - SELECT * FROM table1 INNER JOIN table2 ON table1.id = table2.id

• Example: Outer join - SELECT * FROM table1 LEFT OUTER JOIN table...read more
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Q1. Why should we hire you
Ans. 
I am highly organized, detail-oriented, and have a strong background in compliance and regulations.
• I have a proven track record of successfully managing compliance issues in previous roles.

• My attention to detail ensures that all tasks are completed accurately and efficiently.

• I am dedicated to staying up-to-date on all relevant regulations and guidelines in the field.

• I have excellent communication skills, which allow me...read more
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Q2. Why do you leave you your current organization
Ans. 
Seeking new challenges and growth opportunities
• Desire for career advancement

• Looking for new challenges and learning opportunities

• Seeking a better work-life balance

• Relocation to a new city or country

• Company restructuring or downsizing

• Better salary or benefits offered by new organization
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Q3. What are you looking forward to in Our organization
Ans. 
I am looking forward to the opportunity to contribute to a dynamic and innovative organization that values teamwork and professional growth.
• Opportunity to contribute to a dynamic organization

• Value placed on teamwork

• Opportunities for professional growth
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Q4. What is the size of the largest team you've handled
Ans. 
I have managed a team of 15 members in my previous role.
• Managed a team of 15 members in my previous role

• Delegated tasks effectively to ensure smooth workflow

• Provided guidance and support to team members to achieve goals
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Q5. Can you multitask
Ans. 
Yes, I am able to multitask effectively in order to handle multiple tasks simultaneously.
• I have experience juggling multiple projects and deadlines in my previous roles

• I prioritize tasks based on urgency and importance

• I am able to switch between tasks seamlessly without compromising on quality

• I use tools like to-do lists and calendars to stay organized and on track
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Q1. Difference between deadlock blocking and questions related to deadlock and blocking
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Q2. What are Isolation levels and which is default one and how to specify different isolation from default one.
Ans. 
Isolation levels determine the level of visibility of changes made by other transactions.
• Isolation levels include Read Uncommitted, Read Committed, Repeatable Read, and Serializable.

• The default isolation level in most databases is Read Committed.

• To specify a different isolation level, you can use SQL statements like SET TRANSACTION ISOLATION LEVEL in SQL Server or SET TRANSACTION in Oracle.
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Q3. Their were many other question related to performance tunning and indexes.
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Q1. What are your role & responsibility?
Ans. 
As an Executive Assistant, my role is to provide high-level administrative support to executives by managing schedules, coordinating meetings, handling correspondence, and performing various tasks to ensure the smooth operation of the office.
• Manage executive's calendar and schedule appointments

• Coordinate meetings and conferences, including preparing agendas and taking minutes

• Handle correspondence, emails, and phone cal...read more
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Q2. Why do you looking for a change?
Ans. 
Seeking new challenges and growth opportunities in a dynamic work environment.
• Looking to expand my skill set and take on new responsibilities

• Interested in working for a company with a strong mission and values

• Seeking a more collaborative and innovative work culture

• Want to explore different industries and broaden my professional network
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Q3. What is your current CTC?
Ans. 
My current CTC is $60,000 per year.
• My current CTC is $60,000 per year

• I am currently earning $5,000 per month

• My annual salary is $60,000
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