@khost @Vadim_Klimets @xalexvp02 @basimdev32 thanks to all of you! Fixed!

2018 Feb 4, 5:12:22 PM

Uncertain question. The question should ask about how to check for undefined, but not check is variable defined.

2018 Jan 24, 5:11:58 PM

UNDEFINED

2018 Jan 21, 6:47:37 PM

Uncertain question.

2017 Jun 1, 8:46:06 PM

Change the description: "Select all correct options that allow to check if a variable vRast is UNDEFINED."

2016 Mar 28, 8:32:53 PM

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