HSBC Group Interview Questions and Answers

The problem involves finding the length of the longest increasing path in a 2-D matrix starting from a given cell.

• Use dynamic programming to keep track of the longest increasing path starting from each cell.

• Implement a recursive function to explore all possible paths from a cell.

• Update the length of the longest path for each cell based on the maximum path length from its neighbors.

• Consider edge cases such as boundary conditions and handling negative values in the matrix.

Implement update and rangeSum operations on an integer array based on given queries.

• Implement update(l, r, val) by adding (val + i) to arr[l + i] for all i in range (0, r - l).

• Implement rangeSum(l, r) to return the sum of elements in the array from index l to r.

• Handle queries using 1-based indexing.

• Ensure constraints are met for input values.

• Output the sum of arr[l..r] for each rangeSum operation.

The problem involves determining if a given pattern aligns with a list of words in the same sequence.

• Iterate through the pattern and words list simultaneously to check for matching sequences.

• Use a hashmap to store the mapping between characters in the pattern and words in the list.

• Compare the mappings to determine if the pattern and words align in the same sequence.

Count substrings with unique characters in a given string

• Use a sliding window approach to keep track of unique characters in a substring

• Use a set to store characters in the current window and update the window accordingly

• Increment the count of valid substrings whenever a new character is added to the set

Debugging a Java code involves identifying and fixing errors in the code to ensure it runs correctly.

• Start by understanding the error message or symptoms of the issue.

• Use debugging tools like breakpoints, watches, and logging to track the flow of the code.

• Review the code logic and check for common mistakes like typos, incorrect variable assignments, or logic errors.

• Test different scenarios to reproduce the issue and narrow down the root cause.

• Consider code reviews or pair pro...read more