About Haldor Topsoe
Haldor Topsoe Interview Questions and Answers
Updated 21 Feb 2026Project Manager Interview Experience
Candidate: Emma L.
Experience Level: Senior
Applied Via: Recruiter contact
Difficulty: Hard
Final Result: Rejected
Interview Process
4
Questions Asked
- Describe your experience managing engineering projects.
- How do you handle stakeholder conflicts?
- Explain a time you delivered a project under budget and ahead of schedule.
- Behavioral: How do you motivate a team?
- Scenario: How would you manage a delay in a critical project phase?
Advice
Prepare detailed examples of project management successes and challenges, and be ready for scenario-based questions.
Full Experience
Recruited via a headhunter, I went through multiple rounds including HR, technical panel, and a final interview with senior management. The questions were challenging and focused heavily on leadership and problem-solving. Although I was not selected, the experience was valuable.
Software Developer Interview Experience
Candidate: Markus J.
Experience Level: Mid-level
Applied Via: LinkedIn application
Difficulty:
Final Result:
Interview Process
3
Questions Asked
- Explain your experience with software development in industrial environments.
- How do you ensure code quality and maintainability?
- Describe a challenging bug you fixed.
- Behavioral: How do you handle tight deadlines?
- Technical: Solve a coding problem related to data processing.
Advice
Practice coding problems and be ready to discuss your software development lifecycle experience.
Full Experience
After applying on LinkedIn, I had a phone interview focusing on my background. Then a technical coding test was scheduled, followed by an in-person interview with the development team. The process was well-structured and professional.
Mechanical Engineer Interview Experience
Candidate: Sofia P.
Experience Level: Entry-level
Applied Via: Campus recruitment
Difficulty:
Final Result:
Interview Process
2
Questions Asked
- What do you know about Haldor Topsoe's products?
- Describe a mechanical design project you worked on.
- How do you ensure safety in your designs?
- Behavioral: Tell us about a time you worked under pressure.
Advice
Show enthusiasm for the company’s mission and be ready to discuss your academic projects.
Full Experience
I applied through campus recruitment and had a group interview followed by a one-on-one technical interview. The interviewers were friendly and interested in my academic background and motivation. I was offered an internship position shortly after.
Research Scientist Interview Experience
Candidate: Lars K.
Experience Level: Senior
Applied Via: Referral
Difficulty: Hard
Final Result: Rejected
Interview Process
4
Questions Asked
- Describe your experience with catalyst development.
- How do you design experiments to test catalyst efficiency?
- Explain a challenging research project and how you managed it.
- Behavioral: How do you handle conflicting priorities in research?
- Technical: Write a brief proposal for improving a catalytic process.
Advice
Prepare for in-depth technical questions and be ready to discuss your research methodology in detail.
Full Experience
Referred by a colleague, I went through an initial HR screening, followed by two technical interviews with research team members. The final round was a presentation of my past research. The questions were very detailed and expected a strong grasp of both theory and practical applications. I was not selected but received constructive feedback.
Process Engineer Interview Experience
Candidate: Anna M.
Experience Level: Mid-level
Applied Via: Online application via company website
Difficulty:
Final Result:
Interview Process
3
Questions Asked
- Explain a catalytic process you have worked on.
- How do you approach troubleshooting in a chemical plant?
- Describe your experience with process simulation software.
- Behavioral: Describe a time you worked in a team to solve a complex problem.
Advice
Brush up on chemical engineering fundamentals and be prepared to discuss practical problem-solving experiences.
Full Experience
I applied online and was invited for a phone screening focusing on my background in catalysis. The second round was a technical interview with a senior engineer, where they asked detailed questions about process optimization and simulation tools. The final round was with HR and the team lead, focusing on cultural fit and behavioral questions. Overall, the process was thorough but fair.
Frequently Asked Questions in Haldor Topsoe
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Common Interview Questions in Haldor Topsoe
Q: Suppose a newly-born pair of rabbits, one male, one female, are put in a field. Rabbits are able to mate at the age of one month so that at the end of its second month a female can produce another pair of rabbits. Suppose that our rabbits never die and that the female always produces one new pair (one male, one female) every month from the second month on.
Q: 9 cards are there. You have to arrange them in a 3*3 matrix. Cards are of 4 colors. They are red, yellow, blue and green. Conditions for arrangement: one red card must be in first row or second row. 2 green cards should be in 3rd column. Yellow cards must be in the 3 corners only. Two blue cards must be in the 2nd row. At least one green card in each row.
Q: Consider a pile of Diamonds on a table. A thief enters and steals 1/2 of the total quantity and then again 2 extra from the remaining. After some time a second thief enters and steals 1/2 of the remaining+2. Then 3rd thief enters and steals 1/2 of the remaining+2. Then 4th thief enters and steals 1/2 of the remaining+2. When the 5th one enters he finds 1 diamond on the table. Find out the total no. of diamonds originally on the table before the 1st thief entered.
Q: 3 policemen and 3 thieves had to cross a river using a small boat. Only two can use the boat for a trip. All the 3 policemen and only 1 thief knew to ride the boat. If 2 thieves and 1 policeman were left behind they would kill him. But none of them escaped from the policemen. How would they be able to cross the river?
Q: T, U, V are 3 friends digging groups in fields. If T & U can complete i groove in 4 days &, U & V can complete 1 groove in 3 days & V & T can complete in 2 days. Find how many days each takes to complete 1 groove individually.
Q: The citizens of planet nigiet are 8 fingered and have thus developed their decimal system in base 8. A certain street in nigiet contains 1000 (in base 8) buildings numbered 1 to 1000. How many 3s are used in numbering these buildings?
Q: A light bulb is hanging in a room. Outside of the room there are three switches, of which only one is connected to the lamp. In the starting situation, all switches are 'off' and the bulb is not lit. If it is allowed to check in the room only once.How would you know which is the switch?
Q: There are 3 sticks placed at right angles to each other and a sphere is placed between the sticks . Now another sphere is placed in the gap between the sticks and Larger sphere . Find the radius of smaller sphere in terms of radius of larger sphere.
Q: ABCDE are sisters. Each of them gives 4 gifts and each receives 4 gifts No two sisters give the same combination ( e.g. if A gives 4 gifts to B then no other sisters can give four to other one.)Â (i) B gives four to A.(ii) C gives 3 to E. How much did A,B,C,E give to D?
Q: At 6?o a clock ticks 6 times.The time between first and last ticks is 30 seconds.How long does it tick at 12?o clock?2.A hotel has 10 storey. Which floor is above the floor below the floor, below the floor above the floor, below the floor above the fifth.
Q: There is a room with a door (closed) and three light bulbs. Outside the room there are three switches, connected to the bulbs. You may manipulate the switches as you wish, but once you open the door you can't change them. Identify each switch with its bulb.
Q: The egg vendor calls on his first customer and sells half his eggs and half an egg. To the second customer, he sells half of what he had left and half an egg and to the third customer he sells half of what he had then left and half an egg. By the way he did not break any eggs. In the end three eggs were remaining . How many total eggs he was having ?
Q: Every day a cyclist meets a train at a particular crossing .The road is straight before the crossing and both are travelling in the same direction.Cyclist travels with a speed of 10 kmph.One day the cyclist come late by 25 minutes and meets the train 5 km before the crossing.What is the speed of the train?
Q: A long, long time ago, two Egyptian camel drivers were fighting for the hand of the daughter of the sheik of Abbudzjabbu. The sheik, who liked neither of these men to become the future husband of his daughter, came up with a clever plan: a race would dete
Q: There are 7 letters A,B,C,D,E,F,GAll are assigned some numbers from 1,2 to 7.B is in the middle if arranged as per the numbers.A is greater than G same as F is less than C.G comes earlier than E.Which is the fourth letter
Q: Give two dice - one is a standard dice, the other is blank (nothing painted on any of the faces). The problem is to paint the blank dice in such a manner so that when you roll both of them together, the sum of both the faces should lie between 1 and 12. Numbers from 1-12 (both inclusive) equally likely.
Q: There are four dogs/ants/people at four corners of a square of unit distance. At the same instant all of them start running with unit speed towards the person on their clockwise direction and will always run towards that target. How long does it take for them to meet and where?
Q: Consider a series in which 8 teams are participating. each team plays twice with all other teams. 4 of them will go to the semi final. How many matches should a team win, so that it will ensure that it will go to semi finals.?
Q: A man driving the car at twice the speed of auto one day he was driven car for 10 min. and car is failed. he left the car and took auto to go to the office .he spent 30 min. in the auto. what will be the time take by car to go office?
Q: There are some chickens in a poultry. They are fed with corn. One sack of corn will come for 9 days. The farmer decides to sell some chickens and wanted to hold 12 chicken with him. He cuts the feed by 10% and sack of corn comes for 30...
