Writing this from fake account, I know most of you are good in problem solving, I just want to know how you improved your system design skill's like most of you easily cracked problem solving round's So how you guys practiced system design, I was reading a blog of I_love_Tanya_Romanova that he got rejected directly by facebook, So how you improved your design skill's. I would love to hear from Petr and other experienced coder's.