HashedIn by Deloitte Interview Questions and Answers

They had three coding questions for 1:30 hr and Two technical rounds and at last they had fitment round

Q1. Reverse the array
Ans. 
Reverse the array of strings
• Create a new array and iterate through the original array in reverse order, adding each element to the new array

• Alternatively, you can use the reverse() method on the array itself
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Q2. Detect a loop in the linked list
Ans. 
Use Floyd's Tortoise and Hare algorithm to detect a loop in a linked list.
• Initialize two pointers, slow and fast, at the head of the linked list.

• Move slow pointer by one step and fast pointer by two steps.

• If they meet at any point, there is a loop in the linked list.
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Q1. Questions where based on sysytem design
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Q2. Low level system design questions , design a tic tac toe game
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Q1. Company culture fit
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Q2. People vs Process
Ans. 
Balancing people and processes is essential for effective team management.
• Effective team management requires a balance between focusing on people and processes.

• Investing in developing strong relationships with team members can lead to better collaboration and productivity.

• Establishing clear processes and guidelines can help streamline workflows and ensure consistency in performance.

• Regularly evaluating and adjusting bo...read more
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Q1. MS proficiency related questions
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Q2. Data analysis related questions
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Senior Management case study scenario, conflict management

3 coding question 1 easy 2 med, 1 hard have to do in 90 mins

Q1. Asked about benefits of linked list, tree, graph
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Q2. Questions on SQL
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Q1. You are given n bulbs and a function that can identify a faulty bulb at any location among the n bulbs. If a bulb is found to be faulty, all subsequent bulbs will also be faulty. How can you determine the ...read more
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Q2. To rotate an array by k places to the left
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Q3. To find the second highest salary.Sql question
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1.5 hours
1) maximum subarray sum - LeetCode;
2) keto eating banana - LeetCode;
3) the third one was difficult - dynamic programming question.

Q1. Maximum subarray sum Length of Binary tree Merge Two sorted Linked List
Ans. 
The maximum subarray sum problem involves finding the contiguous subarray within a one-dimensional array of numbers which has the largest sum.
• Use Kadane's algorithm to find the maximum subarray sum efficiently.

• Consider all possible subarrays and calculate their sums to find the maximum.

• Dynamic programming can be used to solve this problem efficiently.

• Example: For array [-2, 1, -3, 4, -1, 2, 1, -5, 4], the maximum subar...read more
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Q2. Quesions from projects, OOPs, Web Development.
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Q3. Pagination, Hoisting etc.
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Q4. DML, DDL etc
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Q1. System Design Relational Schema Table Designing SQL
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Q2. Project discussion + Html js code + basic ques on ML etc
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Arrays and dp questions

Q1. Maximum depth of binary tree
Ans. 
The maximum depth of a binary tree is the longest path from the root node to a leaf node.
• The maximum depth of a binary tree can be calculated recursively by finding the maximum depth of the left and right subtrees and adding 1.

• The maximum depth of an empty tree is 0.

• Example: For a binary tree with root node A, left child B, and right child C, the maximum depth would be 2.
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Q2. Is anagram or not
Ans. 
An anagram is a word or phrase formed by rearranging the letters of another, using all original letters exactly once.
• Anagrams must use all the original letters exactly once.

• Example: 'listen' and 'silent' are anagrams.

• Anagrams can be phrases too: 'A gentleman' and 'Elegant man'.

• They are often used in word games and puzzles.
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