Hitachi Digital Services Accountant Interview Questions and Answers

Some mcq questions and coding question. Both where easy to medium level. Prepare combination/permutation/Time complexity etc

A question related to Binary search and some other follow ups.

Q1. Explain random forest
Ans. 
Random forest is an ensemble learning method that builds multiple decision trees and merges them to improve accuracy and prevent overfitting.
• Random forest is a type of ensemble learning method.

• It builds multiple decision trees during training.

• Each tree is built using a subset of the training data and a random subset of features.

• The final prediction is made by averaging the predictions of all the individual trees.

• Random...read more
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Q2. What is boosting
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Boosting is a machine learning ensemble technique where multiple weak learners are combined to create a strong learner.
• Boosting is an iterative process where each weak learner is trained based on the errors of the previous learners.

• Examples of boosting algorithms include AdaBoost, Gradient Boosting, and XGBoost.

• Boosting is used to improve the accuracy of models and reduce bias and variance.
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Q1. Service desk parameter
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Q2. Troubleshooting and call handling
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Q1. SQL Windows functions based questions
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Q2. Detail explanation of one project which handled previously
Ans. 
Developed a data analysis tool for tracking customer behavior
• Created a database to store customer data

• Designed algorithms to analyze customer interactions with the website

• Generated reports to identify trends and patterns in customer behavior
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Q1. As per your skills, excel, power BI
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Q2. Communication , speed writing
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Q1. Tell me about yourself
Ans. 
I am a dedicated and detail-oriented analyst with a strong background in data analysis and problem-solving.
• I have a Bachelor's degree in Statistics and have completed multiple data analysis projects during my studies.

• I am proficient in using statistical software such as R and Python for data analysis.

• I have experience in conducting market research and creating reports to help businesses make informed decisions.

• I am a q...read more
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Q2. What do you know about our client
Ans. 
Our client is a multinational technology company specializing in software development and cloud services.
• Our client is known for their popular operating system used by millions of people worldwide.

• They offer a wide range of productivity software and cloud services for businesses and individuals.

• The company was founded in the 1970s by Bill Gates and Paul Allen.

• They are also involved in hardware products such as laptops,
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Q1. Prior Experience
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Q2. Capital Market, Hedge Fund
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Q3. Derivatives, Scenario-based question
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Q1. Prior Experience
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Q2. How do you handle escalations?
Ans. 
I handle escalations by addressing the issue promptly, involving necessary stakeholders, and providing regular updates.
• Address the issue promptly to prevent further escalation

• Involve necessary stakeholders to gather input and support

• Provide regular updates to all parties involved to ensure transparency and progress

• Implement solutions to prevent similar escalations in the future
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Q3. What was the toughest escalation I have ever managed
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Q4. Excel - Index, Match, Lookups - XLookup, VLookup, HLookup
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Q5. Job Description
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Q1. Long term vs short-term securities
Ans. 
Long-term securities are investments held for an extended period, while short-term securities are held for a shorter duration.
• Long-term securities typically have maturity dates of over one year, such as bonds or stocks.

• Short-term securities have maturity dates of one year or less, like Treasury bills or certificates of deposit.

• Long-term securities offer higher potential returns but also higher risk, while short-term se...read more
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Q2. Data analysis, vizualization
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Q3. Yield to Maturity, the relationship between yield and interest
Ans. 
Yield to Maturity is the total return anticipated on a bond if it is held until it matures.
• Yield to Maturity is the annual rate of return an investor can expect to earn if the bond is held until it matures.

• It takes into account the bond's current market price, par value, coupon interest rate, and time to maturity.

• Yield to Maturity helps investors compare different bonds and make informed investment decisions.

• For exampl...read more
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Q4. About my project
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Q5. Job Description
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