C/Visual C - Is Memory Affected in Data Structure?

Hello Everyone, Can anyone explain me do I know how the memory is affected by signed and unsigned numbers? Actually, I am preparing some topics for the data structure interview and I have doubts regarding this. If anyone knows please suggest me.

char c = 1 bits 00000001
char c = -1 bits 11111111
short s = 1 bits 0000000000000001
short s = -1 bits 1111111111111111
int i = 1 bits 00000000000000000000000000000001
int i = -1 bits 11111111111111111111111111111111

If the sign bit is 1, then the number is negative.

Data structures may be padded for data alignment as mentioned in “How to avoid wasting megabytes of memory a few bytes at a time.” Those unused bytes used to align fields in the data structure contribute to the wasted bandwidth every time the data structure is loaded from memory or stored to memory.

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