Kyndryl Senior Technical Lead Interview Questions and Answers for Experienced

Q1. Good core understanding
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Q2. Architectural concept based
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Q1. All core questions about java8 ,java,spring ,database,kafka,rabbitmq,datastructure, singleton,coding questions . Questions like how java adopted stream.. what is internally done to adopt collection to st...read more
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Code test which i hd not attended

Q1. Scenario based technical question
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Q2. Code Test , write pseudo code for problem
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Scenario based question and pseudo code for technical problem

Q1. What are your salary expectations?
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Q1. Unix: 1)How we simply find files in directory 2)count of word by using grep command 3)how we kill the particular process 4)command for findout kernal version and on which operating system we worked on 5)w...read more
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Technical interview questions on Unix and SQL
• To find files in a directory, use the 'find' command

• To count words using grep, use the '-c' option

• To kill a particular process, use the 'kill' command with the process ID

• To find the kernel version and operating system, use the 'uname' command

• The 'top' command is used to monitor system processes and resource usage

• A zombie process is a process that has completed execution but ...read more
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Q1. 1) project flow which I worked in previous organization 2)which linux operating system used 3)what is the application server in your project 4)what is the webserver 5)how you login to your application 6)w...read more
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Questions related to project flow, Linux OS, application and web server, troubleshooting, ticketing tool, and handling critical situations.
• Worked on Agile methodology with JIRA as ticketing tool

• Used Ubuntu as the Linux operating system

• Tomcat was the application server and Apache was the web server

• Logged in to the application using LDAP authentication

• Performed troubleshooting by analyzing logs and using debugging tools

• H...read more
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Q1. Is live data is life cycle aware. If it's aware what does ViewModel do?
Ans. 
Yes
• LiveData is lifecycle aware and can be used to observe changes in data.

• ViewModel provides a way to store and manage UI-related data across configuration changes.

• ViewModel can hold LiveData objects to provide data to the UI.

• LiveData and ViewModel work together to ensure data consistency and prevent memory leaks.
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Q2. How does viewmodel survive when activity is destroyed on configuration?
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The ViewModel survives configuration changes by being retained by the system.
• ViewModels are designed to survive configuration changes like screen rotations or language changes.

• When an activity is destroyed and recreated, the ViewModel is not destroyed and retains its data.

• The ViewModel is associated with the activity's lifecycle and is retained until the activity is finished.

• The retained ViewModel instance can be acces...read more
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Q3. Advantage of mvp over mvc.
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MVP offers better separation of concerns and easier unit testing compared to MVC.
• MVP separates the presentation layer from the business logic, making it easier to maintain and modify the codebase.

• MVP allows for easier unit testing as the presenter can be tested independently from the view.

• MVP provides better decoupling between components, enabling easier code reuse and scalability.

• MVP promotes a clear separation of con...read more
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Q4. How does SSL pinning works?
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SSL pinning is a security technique that ensures a client only communicates with a server using a pre-defined public key.
• SSL pinning involves hardcoding the server's public key in the client's code or configuration.

• During the SSL handshake, the client checks if the server's public key matches the pinned key.

• If the keys match, the connection is established; otherwise, it is rejected.

• Pinning prevents man-in-the-middle at
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Q5. How do you achieve data security when saving data persistanly.
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Data security can be achieved through encryption, access controls, backups, and regular security audits.
• Encrypt sensitive data using strong encryption algorithms.

• Implement access controls to restrict unauthorized access to the data.

• Regularly backup the data to prevent data loss.

• Conduct regular security audits to identify and fix vulnerabilities.

• Use secure protocols and communication channels for data transfer.

• Implement...read more
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Q6. Where to save encription key?
Ans. 
Encryption keys should be securely stored in a separate key management system.
• Encryption keys should not be stored alongside the encrypted data.

• Use a dedicated key management system (KMS) to store and manage encryption keys.

• Implement strong access controls and authentication mechanisms for the KMS.

• Consider using hardware security modules (HSMs) for added security.

• Regularly rotate encryption keys to minimize the impact
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Use java 8 to find the first repeated character in a given string