Which of the following addresses a portion of the primary memory by specifying the actual address of the
memory location?
A.
direct addressing
B.
Indirect addressing
C.
implied addressing
D.
indexed addressing
Explanation:
Effective address = address as given in instruction. This requires space in an instruction for quite a large
address. It is often available on CISC machines which have variable-length instructions, such as x86. Some
RISC machines have a special Load Upper Literal instruction which places a 16-bit constant in the top half of a
register. An OR literal instruction can be used to insert a 16-bit constant in the lower half of that register, so that
a full 32-bit address can then be used via the register-indirect addressing mode, which itself is provided as
“base-plus-offset” with an offset of 0.
http://en.wikipedia.org/wiki/Addressing_mode
KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer
Security, page 186.
http://www.comsci.us/ic/notes/am.html