Resume Screening Round: The process began with a resume screening round. Be very particular about your PAN Card, one of my friends was not allowed to give the OA because of some PAN Card issue. So fill the form very carefully.

Round 1: Technical and Cognitive Assessment

This round consisted of 90 questions divided into the following sections:

English
Logical Reasoning - I didn't prepare for English and Logical Reasoning but my friends said that IndiaBix is a good website for it.
MS Office - You can refer to some random websites to find these, just search "Accenture MS Office questions"
Pseudocode - This was very calculation based, there were 18 questions afair, all involved calculation heavy bitwise operations. I will suggest you write down the binary representation of the first 20 natural numbers before attempting this round.
Network Security and Cloud - Same as MS Office, just search on random websites for this.

The test duration is 90 minutes. You will get a mock test link 2-3 days before the actual test, just attempt it, and you will get to know about the test structure.

Round 2: Coding Round

This round commences immediately after the first round(if you pass round 1). This round consists of 2 coding questions to be completed in 45 minutes. Easy questions, the first one was a basic question, and the next one was based on basic recursion (as far as I remember).

Round 3: Communication Assessment

Approximately two days after completing the online assessment, a link is provided for the communication assessment. This round is non-eliminatory. This again consisted of 5 sections.

Reading: In this, you will be asked to read out the given sentences.
Repeating sentences: A sentence will be spoken, and you will have to repeat it (it won't be displayed on the screen; this round is mainly to test your listening skills).
Jumbled sentences: 3-4 phrases will be spoken in a jumbled manner and you will have to arrange and repeat the correct sentence. 
Summarizing Stories: A story will be spoken aloud and you will have to summarize it in your own words covering all the key aspects of it.
Question and Answer: 2 situation based questions (mine were - 1. Something around nuclear families v/s joint families 2. I don't remember)

You will easily find many youtube videos covering this round. One of those is here.

Round 4: Interview

In the interview, I was asked the following:

Introduction - Your name(if they have already addressed you once with your name then you can choose to avoid mentioning your name), your majors, minors(if any), hobbies, technology that you are working on/interested to work on.
Tell me about your projects - I told him,briefly about my motivation to do the project and how each project addressed some problem.
What challenges did you face in the project, and how did you resolve them? - Be honest in this.
How do you make your projects? - I answered by covering the following aspects: firstly, how I choose a project(observing a problem and deciding to solve it), how I approach the problem statement, exploring viable options, starting the actual implementation, and challenges resolution.
Hobbies
Do you have any questions? DO NOT SAY NO to this!! also, don't ask generic questions; ask questions specific to the company.

Mine was mainly HR based interview, I would suggest you to be ready to answer the following questions:

What are your strengths?
What are your weaknesses?
Where do you see yourself in next 5 years?
Why should we hire you?
How are you different from the other candidates?
Tell us about an incident where you demonstrated your leadership skills.
Tell us about an incident where you worked effectively under pressure.
How will you handle a situation when one of your teammates didn't complete the task assigned to him/her on time.
Why do you want to work in this company?
Why do you want to get a software role despite being in core branch?

These are few important HR questions which you must know, you can just search on LinkedIn for HR questions and you will find a bunch of docs/blogs covering the same.

They might also choose to ask you unconventional questions. I heard someone was asked how he felt about India's loss in the World Cup Final. The key is to just stay calm and be confident, they want to test your communication skills and how well you can articulate your thoughts.