Hi Ishita,
Please ask for his/her suitable time to talk first - important thing to create a professional image of yours as an HR and your company/organization.
Then start with what kind of job role he/she is looking for and briefly explain the vacant position. If the candidate finds it interesting, continue the interview.
If the candidate is a fresher, ask questions about education, career interests, domain interests, reasons for interest in the job/domain, salary expectations, joining time, and if they seem suitable, ask them for a personal interview.
For candidates with experience, cross-check with questions on job roles, company profiles, achievements, reasons for a change, current salary, salary expectations, and joining time. Inquire about past experiences and then move on to questions based on education. You can ask questions to gauge interest in your company/job, like why they want to apply. If you find their answers suitable, invite them for a personal interview.
I hope this clarifies your query.
Regards,
Brijesh Deshmukh
Sr. Executive-HR