>>>>Hi everybody,
>>>>
>>>>This is a puzzle, which could be asked on a interview. I could not find a best answer.
>>>>
>>>>There is a 100 floor building. You have two glass balls. You need to find out the floor number, starting from which these balls will broke by minimal number of steps.
>>>>
>>>
>>>What is definition of a step in this case?
>>
>>I think, one dropping of a ball is a step.
>
>Are you saying that I need to find out the lowest floor of this building where a glass ball will break when dropped and I need to explain how it could be determined in the least number of actions?
>
>Renoir

Yes, exactly. Thanks for translating this problem into proper English for me :)