Question

The 16-bit registers are available with their extended size of 32 bits, by adding the registers with a prefix of

(a) X

(b) E

(c) 32

(d) XX

I got this question in an online interview.

My doubt stems from Register Organisation of 80386 -1 in chapter 32-bit Processors-80386, 80387 and 80486 of Microprocessor

Answer 1

Right option is (b) E

To explain I would say: A 32 bit register, known as an extended register, is represented by the register name with a prefix of E.