How many topics should I prepare?

Five to eight for most roles. Prepare the essential requirements first and the nice-to-haves after.

How long before the interview should I start?

A week is enough to go through each topic once and practise the hardest ones twice. Even two days helps if you focus on the top three topics.

What if the job description is vague?

Use the job title and the company's other adverts for similar roles to fill the gaps, and prepare the common questions for that role.

How to prepare for an interview using the job description

Last updated 12 November 2026

The job description is the best study guide you will get: it tells you what the interviewer will check. Read it as a list of topics, put them in order, and prepare one topic at a time, out loud, until you can answer a follow-up question on each.

Step 1: Pull the topics out of the job description

Go through the advert line by line and write down every skill, tool or behaviour it asks for, in a few words each. "Write SQL queries to analyse sales" becomes "SQL joins and aggregation"; "work closely with stakeholders" becomes "explaining findings to non-technical people".

Duties tell you what you will be asked to explain or demonstrate.
Requirements tell you what they will test directly.
Nice-to-haves are where a good answer sets you apart.
Words about teamwork, ownership or customers mean behavioural questions.

Step 2: Rank them

Put first what the advert repeats or lists as essential, and what you are least sure about. Five to eight topics is enough for most roles; more than that and you will prepare nothing well.

Step 3: Learn, then answer out loud

For each topic, read a short explanation and a worked example, then answer two or three interview-style questions without notes. Saying the answer is different from knowing it: you find the gaps when you have to put it into words.

Step 4: Practise one topic at a time

A short interview on a single topic, with follow-up questions, shows you whether you can go one level deeper than your first answer. The next time, practise different questions on the same topic rather than repeating the ones you already know.

Step 5: Finish with a full mock interview

When each topic feels solid, take one complete practice interview for the whole role, so you get used to switching between topics, as you will on the day.

Doing this with HireFlow Agent

JD Prep does steps 1 to 4 for you: paste the job description and it lists the topics with the line of the advert each comes from. Each topic has a short lesson with a quiz (free), and a focused AI interview of 5 to 30 minutes on just that topic (one credit). Every new interview on a topic asks different questions from the ones before.

Prepare this job description topic by topic

Paste it into JD Prep: get its topics, a short lesson on each and a focused practice interview of the length you choose.

Try JD Prep

Frequently asked questions

How many topics should I prepare?: Five to eight for most roles. Prepare the essential requirements first and the nice-to-haves after.
How long before the interview should I start?: A week is enough to go through each topic once and practise the hardest ones twice. Even two days helps if you focus on the top three topics.
What if the job description is vague?: Use the job title and the company's other adverts for similar roles to fill the gaps, and prepare the common questions for that role.