How to ask a native speaker's preferred input system (pinyin, bpmf, etc) What is an appropriate verb for asking native speakers which writing system(s) they are familiar with? 

I have presented the following questions to natives before, all without issues pertaining to clarity. However, I would like to know whether any sound "off" and what instead would be a standard way to ask such an inquiry. 

你用汉语拼音吗？ 

你知道汉语拼音吗？

你认识拼音吗？

你懂汉语拼音码？ 

你看的懂拼音码？

你学了哪个写作系统？
The clearest way I could ask, as a native speaker, is


  你都是用什么输入法来打字的？


输入法 refers to “input system”, and “打字” means type.