KFintech Senior Engineer Interview Questions and Answers

Data structures and algo. 2 ques were asked in hackerrank

Q1. Questions related to System design
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Q1. Basic question related to Spring and Java
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Q1. What are SSL certificates?
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SSL certificates are digital certificates that authenticate the identity of a website and encrypt information sent to the server.
• SSL certificates ensure secure communication between a user's browser and a website's server.

• They use encryption to protect sensitive data such as login credentials, credit card information, etc.

• SSL certificates are issued by Certificate Authorities (CAs) and contain information about the web...read more
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Q2. What are the ways to secure REST API?
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Securing REST API involves using authentication, authorization, encryption, and input validation.
• Use authentication methods like OAuth, JWT, or API keys to verify the identity of clients.

• Implement authorization to control access to resources based on user roles and permissions.

• Encrypt data transmission using HTTPS to protect sensitive information from being intercepted.

• Validate and sanitize input data to prevent inject
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Q3. What if your application is down for 1 hour in one site in prod?
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I would investigate the root cause, work on fixing the issue, and implement measures to prevent it from happening again.
• Investigate the root cause of the downtime, such as network issues, server failures, or software bugs

• Work on fixing the issue promptly to minimize impact on users and business operations

• Implement measures to prevent similar downtime in the future, such as redundancy, monitoring, and failover mechanism
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Q4. How do you make sure a throttling system process dropped messages from a slow downstream service?
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Implement a throttling system to handle dropped messages from a slow downstream service.
• Implement a queue to store messages from the downstream service.

• Set a maximum queue size and drop messages when the queue is full.

• Use a timestamp to track when messages were received and process them in order.

• Implement a retry mechanism to reprocess dropped messages after a certain time.

• Monitor the queue size and processing speed to
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Q1. Product Knowledge
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Q2. Aptitude for fintech
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Q1. Past experience
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Q2. Knowledge of products
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Q1. Cultural fit of the candidate
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Q2. Vision for next 2-3 years
Ans. 
To lead the team in achieving strategic goals, driving innovation, and fostering a culture of collaboration and growth.
• Develop and implement strategic plans to drive business growth

• Lead and mentor team members to enhance their skills and performance

• Identify and capitalize on emerging trends and technologies in the industry

• Foster a culture of collaboration, innovation, and continuous learning

• Build strong relationships w...read more
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Q1. Why do you want to work with ACKO?
Ans. 
I want to work with ACKO because of their innovative approach to insurance and their strong focus on customer satisfaction.
• Innovative approach to insurance - ACKO's use of technology to simplify the insurance process is impressive.

• Strong focus on customer satisfaction - ACKO's commitment to providing excellent customer service sets them apart from other insurance companies.

• Opportunity for growth and learning - I believ...read more
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Q2. What is insurance?
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Insurance is a financial product that provides protection against financial losses resulting from unexpected events.
• Insurance involves a contract between an individual or entity (the policyholder) and an insurance company.

• The policyholder pays a premium in exchange for coverage and protection against specified risks.

• Types of insurance include health, life, auto, home, and business insurance.

• Insurance helps individuals ...read more
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Q1. SQL questions ex- Student table and employees
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Q2. Linux command questions
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Q3. SQL query write test
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Q4. Monitoring tools like control M and etc.
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Q5. Cloud knowledge in AWS
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AWS is a cloud computing platform that offers a wide range of services for storage, computing power, networking, and more.
• AWS provides services such as EC2 for virtual servers, S3 for storage, and RDS for databases

• Knowledge of AWS IAM for managing access control and security

• Understanding of AWS Lambda for serverless computing

• Experience with AWS CloudFormation for infrastructure as code

• Familiarity with AWS VPC for netwo
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They will give some 2 or more SQL questions you should write a query for that, scenario based question on real time production application issues

Q1. Salary expections
Ans. Ask maximum salary what they are offering
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Q2. Prefer Location
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Q1. One leetcode easy-medium problem
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Q2. Java, springboot and oops question
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Q1. Project related questions
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Q2. System design questions
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Quite tough as it had all maths questions

Q1. What is financial crime ?
Ans. 
Financial crime refers to illegal activities that involve the use of financial systems to deceive or defraud individuals or organizations.
• Financial crime includes activities such as money laundering, fraud, embezzlement, and insider trading.

• It often involves complex schemes to conceal the true source or destination of funds.

• Financial crime can have serious consequences for individuals, businesses, and the economy as a ...read more
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Q2. What are the stages of AML ?
Ans. 
The stages of AML (Anti-Money Laundering) include customer due diligence, transaction monitoring, and reporting suspicious activities.
• Customer Due Diligence: Verifying the identity of customers and assessing their risk level.

• Transaction Monitoring: Monitoring transactions for any unusual or suspicious activities.

• Reporting Suspicious Activities: Reporting any suspicious activities to the appropriate authorities.

• Examples...read more
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Q1. What is KYC ?
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KYC stands for Know Your Customer, a process used by financial institutions to verify the identity of their clients.
• KYC is a regulatory requirement to prevent money laundering and fraud.

• It involves collecting personal information such as name, address, and identification documents.

• KYC also includes assessing the risk of a customer and monitoring their transactions for suspicious activities.

• Examples of KYC documents inc...read more
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Q2. What is PEP ?
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PEP stands for Politically Exposed Person, referring to individuals who are entrusted with prominent public functions.
• PEPs are considered higher risk for potential involvement in bribery, corruption, and money laundering due to their position of influence.

• Financial institutions are required to conduct enhanced due diligence on PEPs to mitigate risks.

• Examples of PEPs include government officials, heads of state, and sen
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Q1. Machine coding: Design in-memory document search
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Q1. HLD: Design a ad-click aggregation service
Ans. 
Design an ad-click aggregation service for tracking and analyzing ad clicks.
• Use a distributed system to handle high volume of ad click data

• Implement real-time processing for immediate insights on ad performance

• Utilize a database to store aggregated ad click data for reporting and analysis
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