Let's call my college colleague Andrew.

Andrew knows that we have a really tight deadline to complete 2 different assignments to deliver in the same weekend for evaluation.

Andrew says that we really knows about coding, although we doesn't understand the most basic principles about OOP (like encapsulation, for example).

Whenever I asked for help, Andrew said that is "going to do some research" and that what I'm asking is "really hard". He then asked every single other group if then could provide him, with some code so he could "understand" what I asked him to do.

Once they said "no" he would come and tell me he really tried but hadn't be able to do it, 2 days after needed it, delaying the whole project.

Don't be like Andrew.