Why your questions matter
The questions you ask serve two purposes: they show genuine interest and critical thinking, and they give you information you actually need to make a decision. Most candidates treat this as a formality and ask one generic question. Saying "I cannot think of anything" signals low curiosity. Prepare three to five questions before every interview, knowing you may only get to ask two or three depending on time.
Questions that make a strong impression
"What does success look like for this role in the first 90 days?" Shows you are already thinking about contribution rather than just whether you will get the job. Also gives genuinely useful information about priorities. If the answer is vague, that tells you something too.
"What are the biggest challenges the team is facing right now?" Invites honesty and signals you are not naive about the work being hard. It also gives you material for your follow-up: "Having heard about the challenges around X, I thought you might find this relevant."
More strong questions to consider
"How did the person who previously held this role progress?" Tells you about growth opportunities and culture. "What do people here find most surprising about the culture once they join?" Gets past the marketing answer to something real. Most interviewers give genuinely interesting responses because it sidesteps the defensive reflex that "what is the culture like?" can trigger. "What are the most important decisions this role will be involved in?" Decision-making authority reveals more about actual seniority and influence than a job title does.
Questions to avoid
Questions about salary and benefits in early rounds. Appropriate later once an offer is being discussed. Bringing them up in a first-round interview signals compensation is driving your interest. Questions answered in the job description or on the website. "What does your company do?" suggests you have not prepared. Do your homework so your questions start from an informed base.
How many questions to ask
Prepare five questions and expect to ask two or three. Some will have been answered during the interview. When the interviewer has covered a question you prepared, say so: "You actually answered what I was going to ask about X, which was helpful." This signals active listening.
Do not rush your questions. If the interviewer says they have time for one more, ask the one you genuinely most want answered, not the most impressive-sounding one.