Your computer uses 8 bits to represent decimal numbers (0, 1, 2, 3 and so on) in binary. What is the SMALLEST number for which an overflow error occur?

256

Explanation:

The largest number that can be represented using 8 bits (8 positions of binary 1 or 0) is 255.  This is assuming that the 8 bits are being used to represent only positive integer values.  In 8-bit binary, the decimal number is represented as 11111111.  This means that if you have an 8-bit integer variable with a decimal value of 255 stored in it (again, 11111111 in binary) and you attempt to add 1 more to it (255 + 1), the answer is 256.  256 would require a 9th bit of storage to represent it (100000000 in 9-bit binary) properly, and since the number is limited to 8 bits of storage, the system will throw an overflow error.  Overflow errors happen when you try to store a number in variable that is too small to hold the value.

Fun Fact: most modern computers use 64-bit system architecture.  This means that the largest number you can put into a single 64-bit integer variable is 9,007,199,254,740,992.  Adding 1 to that would, as you've probably guessed, cause an overflow error.

yes, but you must first make sure that you'll be able to make your turn or you can crash into other vehicles.