Ocado Group Automation Control Software Engineer interview questions

Calculate the length of the longest palindrome in a string

Well this interview lasted four hours and i really couldnt get a chance to ask any questions, they just want to sell you the company. Aparantly its a good thing they arent making money because otherwise they would be paying tax?! They must think im a retard to think its good not to make a profit! I was told they have spend 10 years working on the automation of their warehouses and basically it didnt work for 6 of those years because the idiotic management outsourced the programming to different firms. As you can guess when they bolted it together it didnt work. The last 4 years since then they have something they call "unified code" and now write all the function blocks for the plcs. These blocks have no servo control, just single bit i/os all the servo systems must be third party. Basically they wasted millions of bankers money and still cant get it run properly/efficiently to make profit.