No Dp viva is too personal and GTO viva is partially and this viva continued approx 5-10 min. After this viva you're asked to choice your subordinates for command task. There will be a staff he will inform them to come on field performing command task. Remember GTO viva will be conducted on outdoor I mean in the ground. Connect them with you through effective communication trust me they can't deny your existence. 

My name is Ajwad Abir. I am the son of Md. Atiqur Islam and Rehana Amin. I passed my H.S.C from Govt. Public School and College in 2023. My hobbies mainly include outdoor games but I also like watching TV shows. I tend to think of myself as a very optimistic person; that is, I always look at the good side of things.

Share about your parents and siblings. How they helped you to groom etc.

You should say about your school college and university life. These are common questions you have to be a fluent speaker to genuinely prove you fit for this service so before delivering this information in an organized way prepare before appearing ISSB. 

Yeah you must. 

Genuinely observe there performance. Remember you should also assess yourself along with them. It's a leadership quality that you should have to be an officer. Prioritize them based on there performance. In this regards observation is key. Most of the candidates omit this observation phase and fail to give genuine feedback. 

Well you can choice anyone and this is your decision. Choice subordinates wisely. 

Just before the command task  GTO viva is conducted