IBM Software Engineer Interview Questions, Process, and Tips

Q1. Why are you leaving the current organisation
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Q2. Where do you see yourself in 5 years
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Q1. Technical questions on cobol
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Q1. Salary Negotiation
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Q1. Describe Quick sort
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Quick sort is a comparison-based sorting algorithm that uses divide and conquer strategy to sort an array.
• Divide the array into two sub-arrays based on a pivot element

• Recursively sort the sub-arrays

• Combine the sorted sub-arrays to get the final sorted array

• Example: [3, 6, 8, 10, 1, 2, 1] -> [1, 1, 2, 3, 6, 8, 10]
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Q2. What is JWT, describe within 1 minute?
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JWT stands for JSON Web Token, a compact and self-contained way to securely transmit information between parties as a JSON object.
• JWT is commonly used for authentication and information exchange in web applications.

• It consists of three parts: header, payload, and signature.

• The header typically consists of the type of token and the signing algorithm.

• The payload contains the claims, which are statements about an entity (...read more
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Q3. Lowest common ancestor of 2 nodes in a tree
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The lowest common ancestor of two nodes in a tree is the node that is the closest ancestor to both nodes.
• Traverse the tree from the root to find the paths from the root to each node.

• Compare the paths to find the last common node between the two paths.

• The last common node is the lowest common ancestor.
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