1 - Name two fitnah that everyone loves and a truth which everyone hates (hint: two fitnah are mentioned together in the Qur'an)?
a- 1st Other's wife (woman) and 2nd is Wealth
b- Death
2 - An obligatory salah that if missed could never be redone (qadaa') (hint: obligatory part must be agreed upon - no scholarly differences)?
Frist I want to know whats Salah? Is it Salat ?
3 - How many sahaba were ansaar and muhajir? Name those sahaba? (Hint: apply specific definition of mujahir: those who migrated from Makkah to Medina with Prophet - sal-allahu alayhi wa sallam)
oh thats too difficult. As far as my weak memory works, it was only Hazrat Abu Bakar Siddique who was with Prophet Mohammed PBHU when they reached Madina. This makes all other waiting for them sahabas. 
4 - Name the person who lived at the time of the Prophet (sal-allahu alayhi wa sallam) but he never met him, yet, the Prophet (sal-allahu alayhi wa sallam) made a dua'a for him?
I know i have read something about this , but i dont remember.
Ya Akhi too mushkil test ...