For Screening Test Cover following topics in detail
1)Everything about Sindh (Geography,Historical Sites,Poets,Famous personalities,districts etc)
2)General Knowledge of Pakistan(Lakes,Parliament,Monuments,Cities, Geography)
3)Current Affairs(Current happenings of past 2- 3 years like football worldcup,elections 2018,Turkey elections 2018 etc)
4)Currencies and Capitals(Confimed 1 to 2 questions from these 2)
5)Inventions,Basic physics concepts and Basic Biology
6)Geography(For world geography i recommend to study locations of famous seas,oceans,peaks,ports etc)
7)Last but no least English which includes synonyms and antonmys which are too random to predict,analogies again are random but u can focus to grammar usage questions like prepositions and tenses,active passive and narration.

I recommend you to study first 4 plus geography in detail rest just go through a little because in other portions the questions are so random to be prepared for.