The binary representation of +3997 is 1111 1001 1101.
In one's complement this is simply adding a sign bit and inverting all the bits:
1 0000 0110 0010
The two's complement is the one's complement plus 1:
1 0000 0110 0011
That's 13 bits. Normally the sign bit would be at an 8, 16 or 32,... bit boundary.
For -436 it's 10 0100 1100 and 10 bits
Real time system means that the system is subjected to real time, i.e., response should be guaranteed within a specified timing constraint or system should meet the specified deadline. For example: flight control system, real time monitors etc.
The answer is flash mob. They called it flash mob when a large number of people in twitter gather in group for a centralized face to face meeting. In flash mob, people are gathering to be able to create a community that is helping each other or even just talking to each other.
