Chick-fil-A Senior Software Engineer 2 Interview Questions and Answers

Q1. What if auth token expires during a call. How do we retry?
Ans. 
Retry the call with a new auth token
• Check if the auth token has expired during the call

• Generate a new auth token

• Retry the call with the new auth token
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Q2. We use authenticator for it. It is provided by retrofit
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Q1. Basics of Angular and Kendo
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Q2. Versions used in technologies
Ans. 
Different technologies have different versions that are used for development.
• Each technology has its own versioning system (e.g. Semantic Versioning for JavaScript libraries)

• New versions often include bug fixes, new features, and improvements

• It's important to stay updated with the latest versions to ensure compatibility and security
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Create an business application with angular 14 and kendo

Q1. Why should we hire you Do you want to do Post graduation
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Q2. Why should we hire you Do you want to do Post graduation Do want to reallocate
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Q1. Software development lifecycle
Ans. 
Software development lifecycle is a process of planning, designing, developing, testing, deploying, and maintaining software.
• It involves various stages such as planning, analysis, design, implementation, testing, deployment, and maintenance.

• Each stage has its own set of activities and deliverables.

• It helps in ensuring that the software is developed efficiently and meets the requirements of the stakeholders.

• It also help...read more
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Q2. App security & deployment in play store
Ans. 
App security is crucial for deployment in Play Store. Follow best practices to ensure secure deployment.
• Use HTTPS for all network communication

• Implement secure authentication and authorization mechanisms

• Regularly update and patch the app to fix security vulnerabilities

• Use code obfuscation and encryption to protect against reverse engineering

• Conduct regular security audits and penetration testing

• Follow Google Play Store
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DSA , medium n easy leetcode question was there

Q1. Low level design
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Q2. DSA and computer fundamental
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Q1. How to refresh access token if an api fails due to it
Ans. 
Refresh the access token by making a request to the authentication server
• Check the response code of the API call to determine if it's due to an expired access token

• If the response code indicates token expiration, make a request to the authentication server to get a new access token

• Update the access token in the application's authentication header and retry the failed API call
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DSA questions:
1. Replace array of 1s and 0s with 0s in all rows and cols
2. Kandane's algo question

Q1. What is db cluster
Ans. 
A db cluster is a group of databases that work together to provide high availability and scalability.
• Consists of multiple database instances working together

• Provides redundancy and fault tolerance

• Allows for load balancing and scaling

• Examples: Amazon Aurora, Google Cloud Spanner
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Q2. Java collections, filters vs interceptors
Ans. 
Filters and interceptors are used in Java collections to manipulate or control the flow of data.
• Filters are used to selectively include or exclude elements from a collection based on certain criteria.

• Interceptors are used to perform actions before or after certain operations on a collection.

• Examples: Java 8 Stream API filters, Servlet filters for HTTP requests, Hibernate interceptors for database operations.
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Q1. Zigzag traversal of tree
Ans. 
Zigzag traversal of a tree is a method to visit the nodes in a tree in a zigzag pattern.
• Use a queue to perform a level order traversal of the tree.

• For each level, alternate the direction of traversal (left to right, then right to left).

• Store the values of the nodes in each level in an array of strings.
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Q2. 3 Technical rounds Core Java and Springboot ques. RabbitMQ, annotations, multithreading, interface, concurrent hashmap, response body, Rest Api
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