There are a number of different types of interviews. In some cases, you'll only need to succeed at one of these to land the role.
The traditional and still most common form of interview. You'll attend the employer's office and be questioned on your suitability for the job by an individual or panel. Face-to-face interviews usually last between 45 minutes and two hours and may be preceded or followed by tests and exercises. The questions may be strengths-based or competency-based.
Most often used by employers early in the application process to filter large numbers of applicants down to a more manageable number. If you're successful you'll typically be invited to a face-to-face interview or assessment center. Expect a telephone interview to last around half an hour.
Increasingly popular among large employers, and even more so during the CV-19 pandemic. Video interviews can be live or pre-recorded and will tend to last around half an hour.