The Online Assessment (OA) needs to be completed within 3 days from the time of receiving the invitation email.

OA is a CodeSignal general coding assessment.

It has 4 questions and a time limit of 70 minutes.

The test is proctored throughout.

Q1: Freebie. Totally forgot.

Q2: Flatten digits and return the largest, most frequent digit.

Example: [123, 24, 12, 30, 89] => [6, 6, 3, 3, 8] => return 6.

Q3: A variant of Task Scheduler, using Greedy + Heap.

Q4: Given three arrays [a, b, operations], where the a and b arrays are integer arrays, and the operations array represents a list of operations to be performed on the a or b array. Return the result of all operations in a list.

There are two possible operations:

• [0, idx, val]: Assign val to b[idx]. b[idx] = val. Returns nothing.
• [1, target]: Return the number of all possible combinations of [i, j] such that a[i] + b[j] == target.

Example: [[1, 2, 3], [2, 2], [[1, 5], [0, 0, 1], [1, 5]] => [4, 2]

Walkthrough:

The first operation returned 4. The second operation modifies array b and returns nothing. The third operation returned 2.