Yes you can take the PMP exam even if you are not working currently, as per PMI you have to show 4500 hours experience(or 7500 hours in case of diploma) in last 8 years. reetika Hi Sanket ,
Pull-ups are helpful to build arm and back strength. Normal push-ups are great for chest strength. Close-grip push-ups help with arm strength as well. Done correctly, both also have secondary beneficial effects on basic core strength. Top net it out, adding push-ups and pull-ups to your workouts will help build upper-body strength, size and definition.
Here is a graphic of the muscles used in push ups. Compare it with the following about bench press. Both will give you a bigger chest and some more arm and shoulder size. Push ups work the stomach more. I've been working out in the gym for more than 40 years. My advice to anyone who will listen is to do a lot of push ups. Yes, I know the bench will get you stronger than push ups, but it is push ups that will allow you to bench when you get my age.