ANSWER:

Yes, if a person gets to finish at least one rakah before the end of the time of that prayer, he got that prayer. 

Is it true that if someone catches 1 rakah before the sun rises and completes the rest of the prayer in sunrise then the fajr is valid?

Prayer | February 7, 2019 6:43 am
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What is the ruling for using digital praying mats, they have illustrations for kids and audio of Takbeer and Surah fatiha as well.
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I heard we must recite new surahs each Rakah, and don’t repeat any in each rakah. It’s this true?