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Wells Fargo
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I applied via Job Fair and was interviewed in Jun 2022. There were 2 interview rounds.
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I applied via Naukri.com and was interviewed before Apr 2020. There were 3 interview rounds.
SCD Type 2 is a technique used to track historical changes in data over time in a data warehouse.
SCD Type 2 maintains a separate row for each change in data, with a start and end date.
It requires a surrogate key to uniquely identify each row.
Informatica provides a built-in SCD Type 2 transformation to implement this technique.
Example: tracking changes in customer addresses over time.
Find an odd occurring number among even occurring numbers.
Use XOR operation to cancel out even occurring numbers and get the odd occurring number.
Iterate through the array and XOR each element with the result variable.
The final result will be the odd occurring number.
Print the spiral order of a binary tree and matrix.
For binary tree, use level order traversal and alternate direction for each level.
For matrix, use four pointers to traverse in spiral order.
Example for binary tree: 1 -> 2 -> 3 -> 4 -> 5 -> 6 -> 7 -> 8 -> 9
Example for matrix: 1 2 3 4 -> 8 7 6 5 -> 9 10 11 12 -> 16 15 14 13
Finding pairs in an array with a given sum.
Iterate through the array and for each element, check if the difference between the given sum and the element exists in the array.
Use a hash table to store the elements of the array and their indices for faster lookup.
If there are multiple pairs with the same sum, return any one of them.
If no pair is found, return null or an empty array.
Find total number of k element with given avg in an array in minimum time complexity.
Use sliding window technique to traverse the array in O(n) time complexity.
Maintain a sum variable to keep track of the sum of elements in the window.
If the sum of elements in the window is equal to k times the given avg, increment the count.
Move the window by subtracting the first element and adding the next element in the array.
Printing non-boundary elements of a binary tree
Traverse the tree in any order (preorder, inorder, postorder)
Check if the current node is not a boundary node (not the first or last node in its level)
If it is not a boundary node, print its value
Recursively traverse its left and right subtrees
I have a strong background in software engineering and a passion for innovation, making me a valuable asset to HSBC.
I have a proven track record of successfully delivering high-quality software solutions in previous roles.
I am highly skilled in various programming languages and technologies, including Java, Python, and SQL.
I have experience working in agile development environments, allowing me to adapt quickly to chan...
posted on 21 May 2024
Transaction management in Java involves managing database transactions to ensure data integrity and consistency.
Use JDBC or JPA for transaction management
Begin a transaction with 'beginTransaction()' method
Commit the transaction with 'commit()' method
Rollback the transaction with 'rollback()' method
Api design using Spring boot involves creating RESTful APIs with Spring framework for efficient communication between client and server.
Use @RestController annotation to define RESTful web services
Utilize @RequestMapping annotation to map HTTP requests to specific handler methods
Implement request and response bodies using @RequestBody and @ResponseBody annotations
Leverage Spring Boot's auto-configuration and embedded s
Design patterns are reusable solutions to common problems in software design.
Design patterns help in creating flexible, maintainable, and scalable software.
Some common design patterns include Singleton, Factory, Observer, and Strategy.
Each design pattern has a specific purpose and can be applied in different scenarios.
Understanding design patterns can improve code quality and make development more efficient.
I applied via Approached by Company and was interviewed before Jun 2023. There were 4 interview rounds.
posted on 25 Jun 2023
DSA round was the first round in the coding test
posted on 27 Jun 2023
I appeared for an interview before Jun 2022.
based on 4 reviews
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