You have the certificate, relevant experience and technical ability. Your CV earns an invitation, yet the interview ends without an offer.
Qualifications open the interview-room door, but they do not complete the hiring decision. Employers also assess how you communicate, solve problems and fit the role. A capable applicant can lose an opportunity through avoidable job interview mistakes rather than a lack of ability. At Jega Outsourcing Network, we see how preparation and communication affect employers' confidence. These twelve mistakes are common, but correctable.
What Employers Are Really Assessing During an Interview
An employer is not only checking whether you can repeat your CV. They are trying to reduce the risk of a poor hire. Their questions assess:
- whether your experience is genuine and relevant;
- how clearly you listen, think and communicate;
- whether you understand the role and its working conditions;
- how you treat customers, colleagues and supervisors;
- whether you are reliable, honest and willing to learn; and
- whether your expectations match the organisation's needs.
You need clear, credible evidence that you can perform the work and behave professionally.
1. Arriving Late Without Communicating
Lateness can suggest poor planning. Lagos traffic is real, but employers expect candidates to plan for predictable delays.
Wrong approach: Arriving twenty minutes late and saying, “There was traffic,” without calling.
Better approach: Check the route, leave with a buffer and keep the recruiter's number. If an unusual disruption will delay you, send a polite message before the scheduled time with a realistic arrival estimate. For an online interview, test your connection, audio and meeting link, then join early.
2. Attending Without Researching the Employer
Knowing nothing about the organisation makes an application appear random.
Wrong approach: Answering “I do not really know” when asked what the business does.
Better approach: Review the official website, verified social pages and job description. Understand its services, customers and the role. You might say, “I understand that your company provides home care services, and this position focuses on building referral relationships and attracting suitable clients.” Research also helps you confirm the vacancy and its conditions.
3. Giving a Long, Unfocused “Tell Me About Yourself” Answer
Employers want a concise professional introduction, not your life story.
Wrong approach: Discussing family history, unrelated schooling and every job you have ever held.
Better approach: State who you are professionally, mention relevant experience and explain why this opportunity makes sense.
For example: “I am a customer service professional with three years of retail experience. In my recent role, I handled enquiries, resolved complaints and maintained accurate sales records. I am now looking for a position where I can use those skills in a more structured customer-care team.”
Keep it relevant and under two minutes.
4. Repeating Duties Without Showing Results
Job titles do not prove performance. Employers want evidence of how you worked and what improved.
Wrong approach: “I was a sales representative. I attended to customers and sold products.”
Better approach: “I advised customers on suitable products, followed up on enquiries and kept the display organised. I regularly met my weekly target and helped reduce complaints by explaining product use clearly.”
Use honest examples. Without exact figures, describe the situation, your action and the outcome. Never invent achievements.
5. Memorising Answers Instead of Listening
Rehearsed speeches fail when they do not answer the question asked.
Wrong approach: Interrupting the interviewer or forcing a memorised answer into an unrelated question.
Better approach: Listen, pause briefly and answer directly. If the question is unclear, ask: “Would you like an example from my most recent role?” Prepare themes and examples rather than scripts so you sound natural.
6. Speaking Negatively About a Previous Employer
Insulting a former employer makes an interviewer question your judgement.
Wrong approach: “My manager was terrible, and the company did not know what it was doing.”
Better approach: Keep the explanation factual and forward-looking. You could say, “The role changed significantly, and I decided to look for an opportunity with clearer responsibilities and more room to develop my customer-service skills.”
Explain serious issues calmly and focus on what you learnt.
7. Not Knowing the Information on Your Own CV
Changing dates, duties or qualifications damage trust, even when caused by an old or poorly reviewed CV.
Wrong approach: Being unable to explain a listed skill, achievement or employment period.
Better approach: Read every line. Be ready to explain each recent role, the tools used, responsibilities and reason for leaving. Correct errors before applying.
If your CV needs professional restructuring, review Jega's CV service:
https://jegaoutsourcingnetwork.com.ng/cv-service.html
8. Using Vague Claims Without Practical Examples
Words such as hardworking and team player only matter when supported by behaviour.
Wrong approach: “I work well under pressure because I am very hardworking.”
Better approach: “During a busy weekend shift, two colleagues were absent. I prioritised waiting customers, kept the supervisor updated and helped organise orders so the team could continue serving people without losing records.”
Prepare truthful examples covering service, teamwork, problem-solving and learning. Use Situation, Task, Action and Result to keep answers clear.
9. Showing Little Interest or Energy
Nervousness is normal, but one-word answers, poor eye contact or distraction can look like disinterest.
Wrong approach: Looking at your phone, answering only “yes” or “no”, or appearing surprised by basic details from the advert.
Better approach: Put your phone away, sit attentively and answer fully. Say: “I am interested because the position combines customer interaction with stock responsibility, which matches my experience.” Confidence means being prepared, present and clear.
10. Raising Salary Before Understanding the Role
Salary matters, but making it your first concern suggests you have not considered the work.
Wrong approach: Beginning the interview with, “How much will you pay me?” when the salary was already stated.
Better approach: First demonstrate suitability. When invited, refer to the advertised range: “I saw the stated salary and would be comfortable discussing it in relation to the responsibilities, schedule and benefits.” Do not accept conditions you cannot maintain.
11. Exaggerating Experience or Hiding Important Facts
Follow-up questions expose false claims about software, supervision or qualifications.
Wrong approach: Saying you are advanced in Excel when you have only opened simple spreadsheets.
Better approach: Describe your actual level and your plan to improve. For example: “I can enter and format data and use basic formulas. I have not yet worked with pivot tables, but I am currently learning them.”
Present your real ability clearly, acknowledge gaps and show that you learn responsibly.
12. Having No Thoughtful Questions
Good questions show that you are considering how to succeed, not merely how quickly you can be hired.
Wrong approach: Asking only about leave, promotion or how soon you can collect salary.
Better approach: Ask one or two relevant questions, such as:
- “What would strong performance look like during the first three months?”
- “What are the most important daily responsibilities in this role?”
- “How is the team structured, and who would supervise this position?”
- “What are the next steps in the selection process?”
Avoid questions already answered in the advert.
Your Interview Preparation Checklist
Use this checklist before every interview:
- Re-read the vacancy, your application and every line of your CV.
- Research the employer through official and reliable channels.
- Prepare a concise professional introduction.
- Select truthful examples of results, teamwork and problem-solving.
- Confirm the address, travel time, contact person and interview format.
- Choose clean, role-appropriate clothing and prepare required documents.
- Charge your phone, test online-interview equipment and keep data available.
- Plan two useful questions for the interviewer.
- Sleep reasonably, eat beforehand and leave early.
- Keep the recruiter's contact details available in case of a genuine delay.
For more practical interview preparation, read:
https://jegaoutsourcingnetwork.com.ng/blog-post.html?id=job-interview-guide-lagos-candidates
Turn Your Qualifications Into a Stronger Interview
A rejected application does not always mean you are unqualified. Your preparation, evidence or communication may need improvement. Review your last interview, change two behaviours and practise aloud with a trusted person.
Then apply selectively for roles that match your experience, location and availability. Browse vacancies:
https://jegaoutsourcingnetwork.com.ng/jobs.html
Register your CV:
https://jegaoutsourcingnetwork.com.ng/talent.html
Read The Jega Journal:
https://jegaoutsourcingnetwork.com.ng/blog.html
The goal is to help the employer see the capable, honest and prepared professional behind your qualifications.
About the Author
By Jega Outsourcing Network Ltd.
Jega Outsourcing Network Ltd provides recruitment, outsourcing, candidate support and workforce solutions for employers and job seekers in Nigeria. Our career guidance reflects practical questions and behaviours commonly observed during candidate screening and employer interviews.