☛ DB is called as define byte used as a directive in the assembler.

☛ It is used to define the 8 bit data in binary ,hexadecimal or decimal formats.

☛ It is the only directive that can be used to define ASCII strings larger than two characters.

☛ DB is also used to allocate memory in byte sized chunks.

☛ The assembler always converts the numbers lnto hexadecimal.