Analog Devices interview questions

Design a D flipflop, Design a nand Gate with transistors, Explain the real output of the nand Gate, Explain the capacitance of the NAND gate and how It affects to trise and tfall Translate It in a MOSFET and get the capacitance, design a layout of a nand Gate, he tried to Explain me somethimg if i didn't know how to do It and see if could learn from It and apply It in another cases

I was given an RF front-end LNA design, as described and annotated over the phone, and was asked about performance characteristics, operating points, and potential improvements or design changes.