exactly 3 address

at the most 3 address

no unary operators

none of these

add a new name

make an inquiry

add a new name and make an inquiry

all of these

it is simple to implement

it never gets into an infinite loop

both it is simple to implement and it never gets into an infinite loop

none of these

insert symbols onto the stack and onto the input

delete symbols from the stack

delete symbols from the input

all of these

replacing run-time computation by compile time computation

replacing a costly operation by a relatively cheaper one

Both replacing run-time computation by compile time computation & replacing a costly operation by a relatively cheaper one

removing loop invariant computation