
Your aim
If you chose to pursue only one career in a particular field, one resume meets your needs. You must have different resume for every different job if your aim is to look for your chances in various unrelated industries or roles.
If your resume is for all types of jobs and industries, it should be very extensive giving all the details. In other words, hiring managers should be able to spot you as the right candidate for them and call you for an interview. If recruiters and hiring managers cannot decide what to do with your resume it will go to the trash bin.
Take assistance
The best way to know whether your resume is okay is to ask your friend or a relative to go through it. If your goals are confusing, your skills are across the board and hiring managers fail to know what you are aiming at, you need more than one resume.
Your hunt doesn't end at sending out your resumes. You must track it to know whether it is effective and you must also get feedback to gauge your success in your job search.
When you apply for jobs, make a spread sheet or take a notebook and jot down the date, the type of resume you have sent out, and where it was sent. This will give you an idea of how effective each of your resumes is. The exercise helps you remember where you had applied.
Don't get frustrated if the response to your job search is not as good as you expected. It means your resumes need to be fine-tuned. Your aim is to catch the attention of the hiring manager and for that you need a more focused resume.