College of Engineering, Pune

What is your HSC score? For getting admission in any engineering college you need HSC score and JEE or CET score. If your percentile (50% wattage to HSC score and 50% wattage to JEE or CET score) is above 90 or as you belong to reservations if your percentile is above 80 you will get admission in COEP in third round but to wait for round three is very risky and chances are also less like we can't say anything so, calculate your percentile and if you wish wait for second round. Also, if your branch is not decided and you are ready to take any branch in COEP then you have to fill all the branches in option form.

Your question is incomplete I guess, regarding the college name.
Though for getting admission in any engineering college you require HSC score and JEE or CET score. If your percentile (50% wattage to HSC score and 50% wattage to JEE or CET score) is above 90 then you will get COEP and even if your percentile is above 80 then you will definitely get a good engineering college.

Yes, you can get admission in COEP for direct second year in the respective branch if you have done diploma and when your marks are above 90%.

The procedure for getting admission in COEP or any engineering college is registration should be done from DTE. Visit the ARC Centre, then fill the option form. All the information regarding procedure is provided on the DTE website (type DTE in Google and read all the notification).

Google has not yet visited the campus but yes, in coming years, it will recruit from COEP.

Your percentile is 55.27. This score is less to get admission in COEP or VIT but you can get admission in VIIT or CIT.

Diploma is very good for technical knowledge but the salary you will get after completing the same will always be higher than Diploma.
Production engineering in COEP is a sandwich branch but you are compulsory do two internships of 6 months in different companies for completing your degree.

What is your HSC score?
Generally, for getting admission in any engineering college you require HSC, JEE or CET score.
If your percentile (50% weightage to HSC score and 50% weightage to JEE or CET score) is above 90 then you can get admission in COEP or VJTI.
Also, if you are ready to take any branch and belong to reservations then you will definitely get admission in COEP, if your percentile is above 90.

Obviously, CEG Guindy will be a better choice.

To get a lateral entry in any engineering college the procedure is you have to register through DTE website (type DTE on the Google and visit the first link). Second, after the registration, you have to fill the option form for any query. There are ARC centres or FRC centres, they will definitely help. But to get any information like cutoffs or any other thing to read all the information given on DTE website.
All the best.