What is this logical circuit and how does it work?

Question

This is the logic circuit I've drawn a truth table and I've found that when:

C and D are true, then Q is true and complement Q is false

C is true but D is false, then complement Q is true and Q is false

The rest I don't see how you could know. Any tips or pointers?

Answer 1

It is a D-latch!

When C is true (1) the value of D goes to Q.
When C is false (0), anything happens. (The Q dont change)

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