Trent Interview Questions and Answers

The task is to determine the maximum profit that can be achieved by performing up to two buy-and-sell transactions on a given set of stock prices.

• Iterate through the array of stock prices to find the maximum profit that can be achieved by buying and selling stocks at different points.

• Keep track of the maximum profit that can be achieved by considering all possible combinations of buy and sell transactions.

• Ensure that you sell the stock before buying again to adhere to the con...read more

The problem involves finding the optimal strategy to accumulate the maximum amount in a coin game with specific rules.

• Start by considering the base cases where there are only 1 or 2 coins.

• Use dynamic programming to keep track of the maximum amount that can be won at each step.

• Consider the different scenarios when choosing a coin from either end of the line.

• Keep track of the total winnings for both players and choose the optimal strategy to maximize your winnings.

• Implement a r...read more

The longest happy string problem involves constructing a string with 'a', 'b', and 'c' without having any three consecutive letters being the same.

• Determine the maximum number of times 'a', 'b', and 'c' can appear in the string based on the given input values.

• Construct the longest happy string by alternating between 'a', 'b', and 'c' while respecting the constraints.

• Return '1' if a correct happy string can be formed, otherwise return '0'.

The task is to return the spiral path of elements in a given matrix.

• Iterate through the matrix in a spiral path by keeping track of boundaries.

• Print elements in the order of top row, right column, bottom row, and left column.

• Continue the spiral path until all elements are printed.

Detect if a singly linked list forms a cycle by checking if a node's next pointer points back to a previous node.

• Traverse the linked list using two pointers, one moving one step at a time and the other moving two steps at a time.

• If the two pointers meet at any point, there is a cycle in the linked list.

• Use Floyd's Cycle Detection Algorithm for efficient detection of cycles in linked lists.

The minimum number of swaps required to sort an array of distinct elements in ascending order.

• Use a hashmap to store the index of each element in the array.

• Iterate through the array and swap elements to their correct positions.

• Count the number of swaps needed to sort the array.

Use two heaps to efficiently find the median in a stream of numbers.

• Maintain two heaps: a max heap for the lower half and a min heap for the upper half.

• When a new number arrives, compare it with the max of the lower half (max heap).

• If it's smaller, add it to the max heap; otherwise, add it to the min heap.

• Rebalance the heaps if their sizes differ by more than one.

• The median is the root of the max heap if it has more elements, or the average of both roots if they are equal.