Hi! Don't worry too much about the interview. It's more casual than I expected.
1. Essay - As long as you know your resources, and am manage to summarise the key points/ideas, you are good to go. I went the extra mile to source out other articles and stuff, but in the end, the essay only asked you to refer to the ones that you were given.
2. Cognitive test - this is nothing to worry about. It's easy and simple, and you just have to do as much as you can within the given time. Nobody completes this test. It requires basic maths and English.
3. Group interview - Giving an opposing view will make you stand out (with good support, ofc). Don't hog, let everyone talk, but at the same, don't be afraid to voice out. This is where additional information is useful (e.g. I manage to insert the knowledge I got from all the extensive research I did).
4. Individual interview - the questions are basic, but my biggest tip is to know the curriculum well. Don't ask things that you can already find on the website (e.g. CCA, holiday breaks). The question "why social work" is inevitable. They will also ask you about your extra curriculum activities, volunteer work etc because at this point GPA is no longer the factor. They want to see if you actually KNOW what you're getting yourself into. Basically, this is the time where you need to market yourself.
I hope this helps! All the best!