I have nearly 40 days time for my first placements . I want to prepare for aptitude test .How can I prepare myself effectively?

Okay I give you some options

Youtube channels for best preparation for aptitude test.

1. Study smart
2. Adda247
3. Pankaj gandhi Academy
4. Mahendras : online

I strongly suggest you first one only. Study smart

Now you have lots of apps for question solving

I am going to mention few for you i don’t know which kind of aptitude test your going to face if you mentioned properly, i might get idea which kind of difficulty your going to face in examination. Its important when i am suggesting you android apk.