ISRO-2018

Question

DU-chains(Definition use) in compiler design

(a). consist of definition of a variable and all its uses, reachable from that definition.

(b). are created using a form of static code analysis

(c). are prequisite for many compiler optimization including constant propagation and common sub-expr elimination

(d). All

Answer 1

https://en.wikipedia.org/wiki/Use-define_chain

All of these