The main reason to set a field size in access is to limit the lengths of value in the table.
Field size determines the limits or determines the maximum of text that can be input in the text or number field. Also, it may reduce data entry errors in changing the field size in access.
In more technical terms, a computer virus is a type of malicious code or program written to alter the way a computer operates and is designed to spread from one computer to another. A virus operates by inserting or attaching itself to a legitimate program or document that supports macros in order to execute its code.
Answer:
This can be done by sharing some number b/w Alice and Bob.
Let a number c is shared b/w Alice and Bob.
c should not be shared with Chris.
Now, Alice can share (a xor c) with Chris but not to Bob.
Similarly, Bob can share (b xor c) with Chris but not to Alice.
So, Now Chris know (a xor c) and (b xor c).
Chris can calculate (a xor b) = (a xor c) xor ( b xor c).....
So Chris can calculate (a xor b) with satisfying all constraints.
