Is it necessary to have a resume when looking for a job?

Jobs that don't require resumes are generally found by coolies or through relationships. A resume is needed for a normal job search, because a resume is a brief introduction sent by a job seeker to a recruiting unit. Including their basic information: name, gender, age, nationality, native place, political outlook, education, contact information, as well as self-evaluation, work experience, study experience, honor and achievements, job search desire, brief understanding of this job, etc.

So a good resume is very important for finding a job.