Android Engineer Interview Questions and Answers for Freshers

Determine the minimum number of operations needed to make a binary string beautiful by having alternating 0s and 1s.

• Iterate through the binary string and count the number of operations needed to make it beautiful by flipping the bits if they are the same.

• Keep track of the current bit and compare it with the next bit to determine if an operation is needed.

• Return the total number of operations needed for each test case.

Find the rectangle within a matrix that has the maximum sum of its elements.

• Iterate through all possible rectangles within the matrix

• Calculate the sum of each rectangle

• Keep track of the maximum sum found

Reverse nodes within blocks of specified sizes in a singly linked list.

• Iterate through the linked list and reverse nodes within each block size specified in the array.

• Handle cases where block size exceeds remaining nodes by reversing the remaining nodes as one block.

• Update pointers accordingly to reverse the nodes within each block size.