sentence 1: How do I build my profile for top B-schools?
 sentence 2: How do I build my profile for Harvard, Wharton, INSEAD etc.? sentence 1: What are the trickiest questions asked in an interview?
 sentence 2: What are some of the most interesting and difficult questions asked in job interviews and what are their answers? sentence 1: How do I improve my SAT scores?
 sentence 2: How should I improve my SAT score?
same meaning
same meaning
not same meaning