1.What timing constraint would you define if you do not what the tool to throw a specific timing error across clock domain? 2. How did you initialize PCIe? what difficulties did you face and how did you overcome it? 3. You have 32 bits of data and you want to store it in a 64 memory locations? In axi transaction what would you define as burst length and burst size? 4.how do you instantiate DDR memory? 5. what does PCIe use to send interrupts?