Answer: openbook

AnswerCrossword Clue
OPENBOOK

Ingenue's countenance, e.g.

OPENBOOK

Easiest kind of test?

OPENBOOK

Type of test

OPENBOOK
Like some examinations
OPENBOOK
Test type
OPENBOOKKind of test
OPENBOOKKind of exam
OPENBOOKType of exam
OPENBOOKArtless one
OPENBOOKSomething easily understood.
OPENBOOKSomething fully known