Yes. A short pause to organize your thinking is usually better than immediately giving an unstructured list of ideas.

Brainstorming is still testing structured thinking. A brief pause lets you create two or three logical categories, which makes the ideas easier to follow and often helps you generate more of them.

If asked how a retailer could grow, you might take 20 seconds and then organize ideas into existing customers, new customers, and new products or channels instead of throwing out promotions, acquisitions, and pricing in random order.

Tell the interviewer you would like a moment to organize your thoughts, build a simple structure, then brainstorm within it. Practice doing this quickly so the pause feels deliberate rather than hesitant. If useful, this guide on case interview insight generation gives more detail.

Yes, take the pause. 20 seconds feels longer to you than to them.