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.
To increase your push ups, you should incorporate some sort of weight lifting workout. Increase the strength of your chest (pectoral) and triceps muscles will allow you to do more push ups. It is a myth that you can only train for push ups by doing push ups.