what is the typical sentence for 12020(a)(4) state of california
Penal Code 12020(a)(4), carrying a concealed dirk or dagger (which means a knife or other stabbing weapon) is a misdemeanor with a maximum of a year in jail.
There's no such thing as a "typical sentence." It depends on the circumstances and the defendant's record, and can range from only a fine to the full year in jail.
That code section is actually a "wobbler," meaning it can be charged as either a felony (maximum 3 years in state prison) or a misdemeanor (max of 1 year in county jail).
While many first time offenders are charged with the misdemeanor, depending on your record (if any) and the facts of the case, it could potentially be charged as a felony.