Wonderla Holidays Associate Software Engineer Interview Questions and Answers

The assignment was to display a flight list and implement sort and filter functionality.

Basic of react native concepts and live machine coding round

Q1. Coding Question and resume based questions
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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. 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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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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First round was on basics of java. It was surprising to have such questions asked to interviewee applying for a lead role.

Q1. It was majorly around system design. HLD, LLD and scalability and adaptability issues.
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Q1. What We Take General Column Cover
Ans. 
General column covers are used to protect and enhance the appearance of structural columns in buildings.
• General column covers are typically made of materials such as metal, stone, or composite materials.

• They are used to provide a decorative finish to columns, hiding any imperfections or structural elements.

• Column covers can also serve as a protective barrier, preventing damage from environmental factors or accidental i...read more
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Q2. What is Design Strength
Ans. 
Design strength refers to the maximum stress a material or structure can withstand without failure.
• Design strength is a key factor in determining the safety and reliability of civil engineering projects.

• It is typically determined through extensive testing and analysis of materials and structures.

• Design strength is often expressed as a factor of safety, which accounts for uncertainties and variations in real-world condi...read more
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Q1. What you like in jubilant as Company
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Q1. Salary Expectation while you join
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Q2. Current Experience with any other brand
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