Help with IST Exam

[VAkena]

How many different numbers can be represented by an integer variable stored in two bytes of memory?

[Virtual01]

@VAkena

 

Ok don't quote me on this but here is what I think:

 

2 bytes is 16 bits. First bit is used for the sign (+ or -), which leaves 15 bits left to carry numerical data. 2^15 is 32768. That is how many values can be represented as positive numbers or zero. Multiply it by two to get 65536 to account for negative values. Subtract 1 because the question asks how many different numbers can be represented, and even though technically zero in this case be both positive and negative, the value remains the same so it does not count towards the total. Your final answer is 65535 values.

 

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