Yes, ConocoPhillips does a drug test prior to an offer of employment. In most cases, the drug test is a urine test or mouth swab that is done through a private laboratory and paid for by ConocoPhillips.
The dress code for ConocoPhillips corporate positions is business casual. Business casual attire is broadly defined as a code of dress that blends traditional business wear with a more relaxed style. Although some positions are remote, it is expected that you will maintain a professional appearance for on camera activities.
Yes, it is hard to get a job at ConocoPhillips. The company is known to have an extremely rigorous hiring process with several interview rounds lasting one hour each.
The initial interview with ConocoPhillips is a virtual screening (called HireVue) with pre-recorded questions in which a candidate is expected to record their responses. This feels very impersonal as you are talking to a screen with no interaction or feedback, so be sure to practice being personable and upbeat while talking to a screen.