As you asked about some tips to clear IES exam in 1st attempt, I am
mentioning some of them below



Go over the syllabus and select important subjects:

You should have a very strong idea of the syllabus. Identify the subjects
which carry the majority marks, start preparing with the ones that carry the
highest marks

Solve Past year questions:

The most important measure you need to take. This guarantees you have an
idea of what you need to know, what you already know, and identify the
pockets where you need to work on.

Set your own targets and limits:

Accurately note down the subject/chapter/topic you intend to study in say a
week/day. Test yourself to meet the set target within the decided deadline.
This will ensure you have a steady pace while preparing.

Get a study mate:

I am not a big fan of Group studies: they produce more noise than results,
but having a study mate can occasionally be helpful. You can monitor each
other’s' progress, discuss doubts, create a healthy constructive competition
between each other.

Make thorough, well thought of, clean notes:

They are very helpful while last minute revision.

Join a test series/ coaching centre if possible. Do not freak out if you
cannot.

For English and GS, solve past years' questions from IES, IFS, NDA
examinations. Remember that they carry only 200 marks while the technical
part is of 800 marks- your priority should always be to get the technical part
straight first.

Here are some books that you can use for the preparation:

Arihant Publication - General Studies

Upkar Publication - General Studies

RPH Editorials

Made Easy Publishers

Disha Publication - Disha Experts

RS Agrawal

GK Publication

Lucent Publication - General Studies

The Hindu - Daily New Paper for Current Affairs

Economic Times

Economic Survey

Chronicle Magazine