OPNET
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OPNET Interview Questions & Reviews in Washington, DC

All Interviews Received Offers

Getting the Interview 

41%
41%
16%

Interview Experience 

22%
66%
11%

Interview Difficulty 

Average Difficulty
9 candidate interviews Back to all interview questions
Relevance Date Difficulty
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No Offer

Neutral Experience

Average Interview

Software Engineer Interview

Software Engineer
Bethesda, MD

I applied online - interviewed at OPNET in March 2013.

Interview Details – I was given the details about the Company the the position requirement. Started the interview by asking me the level of Expertise in C, C++. Then the interview went by asking questions in Networking area and finally ending with the next steps in the process.

Interview Question – Advantages of Binary Tree and Hash Table over each other   Answer Question

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6 people found this helpful

No Offer

Negative Experience

Difficult Interview

Software Engineer Interview

Software Engineer
Bethesda, MD

I applied online and the process took 4+ weeks - interviewed at OPNET.

Interview Details – My OPNET interview process came in five steps:

1. 15-30 minute get-to-know-you phone call with an HR person
2. 60 minute technical phone call with a engineer
3. Timed at-home coding test
4. 60 minute technical phone call to review the results with a more senior engineer
5. Full 8 hour day spent at their Bethesda office. This included demos of their products, two more code tests, two more test-review sessions, more get-to-know-you interviews with mid to upper level staff, free lunch.

This might seem overly thorough, but it makes more sense than a 5 minute phone call and a two hour technical interview. When they decide to hire a candidate they want to be 100% sure he or she is the right fit.

All code tests were timed and focused on OO concepts and algorithms. All of them were done in notepad with no IDE, no compiling and thus no need to be syntactically correct. The most important part was the follow up conversation when you get a chance to explain your solution and thought process.

During the process I was surprised by OPNET's emphasis on academic pedigree. Several people I spoke to pointed out how the founders of the company went to MIT, and that many of them also went to impressive ivy league schools like Yale and Stanford. I was further surprised when they asked my college GPA. After ten years out of school I don't see how that information relevant (and I could barely remember). I too went to an impressive ivy league school and I can tell you first hand that it really doesn't mean much. If you're smart then you're smart and that's about it. Some of the brightest engineers I know are self-taught and went to what some might consider "unimpressive" schools. However I understand why this would be used to filter out candidates. As far as the engineers go, some were extremely serious and others were more casual and friendly, but everyone was certainly smart, passionate and excited about their work.

I was told in the beginning that if I made it to the full day session they would know right away whether they'd like to extend an offer. Three weeks later and I have yet to hear back. I've emailed my original HR contact several times and she keeps brushing me off. I am taking this as a "no", but I think if a candidate took this much time out of their schedule (including using a full vacation day) then OPNET should have the professional courtesy to give a prompt response, whether its yes or no, plus some shred of feedback.

Interview Question – See above description of the code tests   Answer Question

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Accepted Offer

Positive Experience

Difficult Interview

Senior Consultant Interview

Senior Consultant
Bethesda, MD

I applied through an employee referral and the process took 1 week - interviewed at OPNET.

Interview Details – The hire process starts with a 1-hour do at home test on routing. They expect to have an a solved problem within 1 hour. After submitting your work an engineer will call you to discuss your answers. If you are doing well you will have got the question 100% correct. Then they will challenge you on alternative design and architecture ideas. If you do well at this questions you will have a half-day interview session at OPNET. This day consists of 5-7 interviews some technical, some fit, and one with the CEO or CTO. You will also have lunch with a bunch of current employees.

Interview Question – Diagramming the TCP/IP communication.   View Answer

Negotiation Details – The negotiations were like all other employment negotiations. I negotiated up my salary because their profit sharing was not as good as my previous employer. I also up negotiated my days of vacation.

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Accepted Offer

Positive Experience

Average Interview

Applications and Network Performance Engineer Interview

Applications and Network Performance Engineer
Bethesda, MD

I applied online and the process took 1+ week - interviewed at OPNET in June 2012.

Interview Details – Hiring was quick. One technical phone interview and then an onsite Interview in a weeks time entire day with 3 tests. It was OK.

Interview Question – Nothing really.   Answer Question

Negotiation Details – Usually not Negotiated.

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No Offer

Neutral Experience

Difficult Interview

AppTransaction Xpert Interview

AppTransaction Xpert
Bethesda, MD

I applied through college or university and the process took 4+ weeks - interviewed at OPNET in March 2012.

Interview Details – Applied online. Received a pre-screening interview than set up a phone technical interview. Was asked basic networking and coding questions. Then took a one-hour coding test in which I had to design a system to accept planes that are ready for take off and allow one at a time to take off based on priority. I did this with four different queues, each having a different priority. Reviewed this with a senior engineer. Asked performance questions, how I could have improved it, how I would have used a different data structure. Waiting for next step.

Interview Question – How would you implement a binary tree?   Answer Question

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No Offer

Neutral Experience

Average Interview

Software Engineer Interview

Software Engineer
Bethesda, MD

The process took 3 days - interviewed at OPNET in May 2011.

Interview Details – The process consisted of screening, coding problem and a code review

1) Screening round was a telephonic interview by senior developer who asked questions on Networking and Java.

2) Next was coding round in which, the recruiter gave 2hrs time limit and gave 3 coding problem.

First 2 problems were pretty basic. The third one was little time consuming. It was a simple OO problem of queueing based on priority.

Interview Question – About design patterns?   Answer Question

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No Offer

Neutral Experience

Easy Interview

Java Developer Interview

Java Developer
Bethesda, MD

The process took 3 weeks - interviewed at OPNET in January 2011.

Interview Details – The process consisted of screening, coding problem and a code review

after a screening by senior developer, the recruiter gave a fixed a one hour time frame and gave a coding problem.

It was a simple OO problem of queueing the Aircrafts based on priority.

Next. the code review: questions on the running time for the algorithm. Clean and more generalization is expected from the code.

I havnt heard from the recruiter after the review.

Interview Questions

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Declined Offer

Neutral Experience

Average Interview

Engineering Interview

Engineering
Bethesda, MD

I applied through college or university and the process took 5 days - interviewed at OPNET in November 2010.

Interview Details – time complexity
arrays vs linked list

Interview Questions

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No Offer

Neutral Experience

Average Interview

Software Engineer Interview

Software Engineer
Bethesda, MD

I applied online and the process took a day - interviewed at OPNET in May 2010.

Interview Details – 30 min phone interview. Mostly C & Networking questions. Asked me if I finished CCNA although my resume says otherwise.

Interview Questions

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