Top Interview Questions, Red Flags & Killer Answers

You’ve polished your CV, rehearsed your introduction, and picked out a sharp outfit. But the moment the interviewer says “Tell me about yourself,” your mind goes blank – interview questions can feel like a minefield, but with the right preparation, you can turn anxiety into confidence, and this guide breaks down the most common questions, the hardest ones, red flags to watch for, and the killer question that tests your fit — all with practical frameworks rooted in Irish recruitment advice.

STAR answer length: 1–3 minutes (Enterprise Mobility Ireland) ·
STAR story ideal length: 2 minutes (University College Cork) ·
Behavioural question format: “Describe a time when…” (IrishJobs) ·
Weakness answer trap: Clichés like “I work too hard” (TU Dublin)

Six key facts about interview preparation, drawn from Irish career experts, reveal a consistent pattern: structured answers and honest self-awareness matter more than memorised scripts.

What are the 10 main interview questions?

Career experts across Ireland consistently identify a core set of questions that appear in nearly every interview. Knowing them in advance halves the anxiety.

Tell me about yourself

• This opener often catches candidates off guard. TU Dublin (technological university) advises structuring a concise 60-second summary of your professional journey, tailored to the role.
• Career coaches recommend starting with your current role, then your relevant past experience, and closing with why you’re interested in this job.

Why do you want this job?

• This tests your research. RBK (Irish accounting firm) suggests reviewing the job description and identifying key skills the employer wants.
• Mention specific aspects of the company’s mission, culture, or recent projects that genuinely appeal to you.

What are your greatest strengths?

• Pick a strength that matches the job requirements. Use a brief STAR example to back it up.
• Enterprise Mobility Ireland emphasises the Action part – show specifically what you did.

What is your biggest weakness?

• TU Dublin warns against clichés like “I work too hard” or “I’m a perfectionist.” Instead, choose a real weakness and describe the steps you’re taking to improve it.
• Use the STAR method to frame a story of how you recognised a flaw and acted to correct it.

Where do you see yourself in five years?

• Employers want to see ambition aligned with the company’s growth. Trinity College Dublin advises preparing examples that showcase achievements.
• Be honest but flexible – show you’re open to developing within the organisation.

Why are you leaving your current job?

• Stay positive. Never badmouth a previous employer. Frame it as a search for new challenges or growth opportunities.
• Robert Walters Ireland advises against interrupting or talking over the interviewer.

What is your salary expectation?

• Jobs.ie suggests researching typical ranges – for example, a graduate role might expect €28,000–€32,000.
• If pressed, give a range that reflects your research and be prepared to discuss benefits.

Describe a challenge you overcame

• This is a classic behavioural question. Use the STAR method: Situation, Task, Action, Result.
• University College Cork recommends delivering your story with energy and keeping it to about two minutes.

Why should we hire you?

• Summarise your unique value proposition: what you bring that other candidates don’t. Tie it to the job description.
• CPA Ireland recommends preparing at least two STAR examples before the interview.

Do you have any questions for us?

• Always have questions ready. Jobs.ie suggests asking about the biggest challenges facing the company, day-to-day responsibilities, and promotion prospects.
• Robert Walters Ireland advises against asking about pay and benefits in the first interview.

The implication: candidates who invest in structured preparation already have a clear advantage over those who wing it.

What are the 5 hardest interview questions?

Even seasoned professionals stumble on these five. Their difficulty lies in the balance between honesty and strategy.

Tell me about yourself – why it’s hardest

• Without a structure, candidates ramble. TU Dublin advises a 60-second arc: current role → relevant past → why this job.
• Practise your pitch aloud to avoid filler words.

What is your biggest weakness?

• The trap is sounding insincere. TU Dublin explicitly warns against clichéd answers.
• Use the STAR method: describe a real weakness, the steps you took to improve, and the positive outcome.

Why did you leave your last job?

• Keep it professional and forward-looking. Robert Walters Ireland emphasises not interrupting and staying positive.
• Frame it as a desire for growth or a better fit with your values.

Describe a time you failed

• Honesty is key, but don’t blame others. Enterprise Mobility Ireland says the Action part should show what you specifically did.
• End with what you learned and how you applied that lesson.

What are you most passionate about?

• This tests cultural fit. Choose a genuine interest that relates to the role or shows transferable skills.
• UCD Professional Academy suggests that if you haven’t faced a situation, explain how you would handle it.

What this means: even the most confident candidate can be undone by a lack of rehearsal. Structured practice is the only reliable defence.

What are red flags during a job interview?

Red flags run both ways. Hiring managers assess candidates, but smart candidates also evaluate the employer. TU Dublin and other Irish career services have identified 29 common red flags.

Red flags for candidates: vague job description, interviewer unprepared

• If the interviewer doesn’t know your CV or the role’s requirements, it signals poor internal communication.
• Robert Walters Ireland warns against interrupting, but also notes that an unprepared interviewer is a red flag.

Red flags for interviewers: candidate late, poor communication

• Lateness, negative body language, and dishonesty are top concerns for employers.
• IrishJobs notes that behavioural questions often reveal these traits.

29 red flags from hiring experts

• Common warning signs include: vague answers, talking too much, lack of eye contact, and unprofessional attire.
• Trinity College Dublin advises preparing examples that showcase achievements to avoid looking unprepared.

The pattern: red flags are signals of misalignment. Both parties should treat them as data points, not as deal-breakers without context.

What is the killer question in an interview?

The “killer question” is the one that separates prepared candidates from the rest. It typically tests your motivation, research, and self-awareness.

Why do you want this job?

• This question forces you to connect your skills to the company’s needs. RBK recommends reviewing the job description and identifying key skills.
• A weak answer – “I need a job” – is a hard pass.

What can you do for us that other candidates can’t?

• This is a direct challenge to differentiate yourself. Enterprise Mobility Ireland advises using “I” and quantifying your results.
• Prepare a unique selling point backed by a STAR story.

Why should we hire you?

• It’s a closing question that demands a concise summary. CPA Ireland says preparing at least two STAR examples helps you deliver this confidently.
• Keep it to 30 seconds and tie it back to the company’s goals.

The consequence: a well-prepared answer to the killer question can single-handedly tip the decision in your favour.

What are 5 good interview questions to ask the employer?

Asking thoughtful questions shows engagement and helps you assess whether the role is right for you. Trinity College Dublin and Jobs.ie provide excellent guidance.

What does a typical day look like?

• Reveals workload, autonomy, and team dynamics. Jobs.ie suggests asking about day-to-day responsibilities.

What are the team’s biggest challenges?

• Shows you’re thinking about contributions. Jobs.ie recommends asking about the biggest challenges facing the company.

How is success measured in this role?

• Helps you understand performance expectations. Trinity College Dublin advises preparing examples that showcase achievements.

What is the company culture like?

• Reveals values and work environment. Robert Walters Ireland warns against asking about pay and benefits in the first interview, but culture questions are welcome.

What are the next steps in the interview process?

• Shows interest and helps you plan. Jobs.ie suggests asking about promotion prospects and training schemes.

The implication: the questions you ask are as revealing as the answers you give. Use them to demonstrate critical thinking and genuine interest.

How to answer interview questions using the STAR method

The STAR method is the gold standard for behavioural questions. Irish career services from RBK to University College Cork recommend it. Here’s a step-by-step guide.

1. Understand the Situation – Set the context. Describe a specific event, project, or challenge. Keep it brief – one or two sentences. Enterprise Mobility Ireland says the Action part is the most important, but a clear Situation lays the foundation.
2. Define the Task – Explain your responsibility or goal in that situation. What were you asked to achieve? CPA Ireland recommends preparing at least two examples so you can pick the best one.
3. Describe the Action you took – This is the core of your answer. Use “I” not “we” to show your individual contribution. Enterprise Mobility Ireland stresses that the Action part should highlight what you specifically did. Include details like skills used, steps taken, and decisions made.
4. Explain the Result – Quantify the outcome if possible. Enterprise Mobility Ireland advises that the Result should ideally be quantified. Examples: “increased sales by 20%”, “reduced processing time by 15%”, “received positive feedback from stakeholders”.
5. Practise aloud – University College Cork recommends delivering your STAR story with energy and keeping it to about two minutes. Record yourself and check for clarity, conciseness, and confidence.

The catch: practice without structure is just rehearsal. STAR gives you structure, but only honest reflection on your own experience makes it credible.

Clarity: What we know and what’s still uncertain

Interview preparation is part science, part art. Here’s where the evidence stands.

Confirmed facts

• 10 most common interview questions are consistent across multiple sources (TU Dublin, Trinity College Dublin, Jobs.ie)
• STAR method is widely recommended for behavioural questions (RBK, CPA Ireland, UCC)
• Preparing at least two STAR examples is a common recommendation (CPA Ireland)

What’s unclear

• Exact ranking of hardest questions varies by industry and role
• Efficacy of specific answer scripts is anecdotal rather than empirically proven
• Optimal answer length differs across sources (1–3 minutes vs 2 minutes)

The pattern: the solid ground is the STAR method and the common question set. Uncertainties exist around ranking and exact scripts, but that’s where candidate judgment fills the gap.

Expert perspectives on interview preparation

“The STAR method stands for Situation, Task, Action, and Result. It’s a proven framework for answering behavioural questions.”

— RBK (Irish accounting firm)

“The Action part is the most important part of STAR because it should show what the candidate specifically did. Use ‘I’ rather than describing only team actions.”

— Enterprise Mobility Ireland

“A STAR story should be about two minutes long and delivered with energy and enthusiasm.”

— University College Cork

“Candidates should avoid clichéd weakness answers such as ‘I work too hard’ or ‘I find it difficult to delegate.'”

— TU Dublin (technological university)

These perspectives converge on a single truth: preparation beats improvisation. The STAR method, practiced and tailored, gives candidates a reliable structure. Employers, meanwhile, benefit from honest, specific answers that reveal real capability.

For job seekers in Ireland, the choice is clear: invest time in building two strong STAR stories, research the company thoroughly, and come with thoughtful questions. Interviewers, for their part, should look beyond polished scripts and probe for genuine self-awareness. The cost of a bad hire or a missed opportunity is far higher than the effort of preparation.

Frequently asked questions