Prepare for and practice interview questions from Spirent Communications.

Spirent Communications Interview Questions

A/B Testing

Algorithms

Analytics

Machine Learning

Probability

Product Metrics

Python

Statistics

Spirent Communications Interview Guides

Suppose there exists a new airline named Jetco that flies domestically across North America. Jetco recently had a study commissioned that tested the boarding time of every airline, and it came out that Jetco had the fastest average boarding times of any airline.

What factors could have biased this result, and what would you look into?

What could potentially bias the average boarding time in favor of an airline that only flies domestically?

What could potentially bias the average boarding time in favor of an airline that only flies domestically?

Boarding Times Bias

A new airline came out as the fastest average boarding times compared to other airlines.  What factors could have biased this result and what would you look into?

You are testing hundreds of hypotheses with many t-tests. What considerations should be made?

What is a key disadvantage of the F-test when compared to multiple t-tests?

What is a key disadvantage of the F-test when compared to multiple t-tests?

Hundreds of Hypotheses

You are testing hundreds of hypotheses with many t-tests. What considerations should be made?

Let’s say you work for a social media company that has just done a launch in a new city. Looking at weekly metrics, you see a slow decrease in the average number of comments per user from January to March in this city.

The company has been consistently growing new users in the city from January to March.

What are some reasons why the average number of comments per user would be decreasing and what metrics would you look into?

What metric could be used to measure if active users are still engaging on the platform despite an overall decrease in the average number of comments per user?

What metric could be used to measure if active users are still engaging on the platform despite an overall decrease in the average number of comments per user?

Decreasing Comments

How would you investigate a decline in the average number of comments per user?

Job Title:Staff Software Engineer, Network Security Requisition #:2888 Country:U.S.State:TexasCity:PlanoExempt/Non-Exempt:ExemptJob Type:Regular Full-timeDuration:(If not Full Time) Area of Interest:EngineeringJob Overview:Staff Software Engineer, Network SecurityJob Overview:Spirent Communications is seeking an outstanding Staff Software Engineer, Network Security who will be a core member of the security engineering team whose responsibility is to develop the network security test components and content for the award-winning Spirent Avalanche product family.We are looking for a self-starter, an individual who understands network security products and can learn new network security threats quickly.The ideal candidate will work well independently as well as within a team.The Staff Software Engineer, Network Security will work closely with members of our Product Management, User Experience, and User Interface Engineering teams to design and develop new software products as well as to enhance our existing products and online offerings.The ideal candidate will thrive on developing innovative ideas for advanced security and cyber range testing.Spirent is its employees.Finding the flexible path to help you realize your passion and ambition is central to our success as a global leader in test and measurement.At Spirent we work together to find the right route to develop your skills and experience, nurturing your curious spirit to find new solutions for our customers and extend your own knowledge.We help you push the boundaries in a culture that gives you the freedom to innovate.Working at the frontiers of next generation technologies opens up new opportunities all the time.And of course life outside work changes too.So we make sure your career path flexes to keep you going in the right direction and at the right speed.Are you innovative enough to work at Spirent?Job Responsibilities: Add new features as well as enhance attack and fuzzing frameworks (i.e., test engines) Work closely with application development teams to deliver new cybersecurity test components and content. Contribute to attack library (i.e., exploits targeting vulnerabilities) as well as validate level of maliciousness of new malware samples. Interact with Product Manager to fully understand the requirements and be able to develop the user story of those services. Document and demonstrate solutions by providing good written documentation, flowcharts, layouts, diagrams, charts and presentations. Able to work outside of your comfort zone by contributing to discussions and decisions on both upstream (front-end) and downstream (back-end) tasks. Will be expected to provide accurate forecasts of work effort and to clearly communicate implementation risks and design trade-offs to peers and team members. Work within a test driven development team where unit tests are integrated from the earliest stages of the development cycle; familiarity with Scrum and Agile Software Development methodologies strongly preferred. Communicate effectively, both verbal and written. Accountable individual contributor and good team player. Self-motivated and a problem solver.Job Requirements: BS or MS in Computer Science or equivalent with relevant work experience. 10years experience. Proven background in the network security field with an understanding of firewalls, filtering, IP networking and routing. Strong level knowledge of internal architectures of botnets/zombies, malware including mobile malware. Strong knowledge of internal workings and latest methodologies of Botnets, Malware and Distributed Denial of Service attacks. Strong verbal and written communication skills. Strong C/C+experience in Unix/Linux environment. Strong knowledge of scripting languages (i.e., Ruby, Python). Strong investigative and analytics problem solving skills. Ability to do packet level analysis and reverse engineering. Strong knowledge of network/application/mobile penetration testing, vulnerability research, exploit coding.Posted by StartWire..

Job Title:Product Manager, Applications and Security Requisition #:3097 Country:U.S.State:TexasCity:PlanoExempt/Non-Exempt:ExemptJob Type:Regular Full-timeDuration:(If not Full Time) Area of Interest:EngineeringJob Overview:Product Manager, Applications and SecurityJob Overview:Spirent Communications is seeking an outstanding Product Manager for the Applications and Security Business Unit.This is a hands-on role handling the day-to-day activities of product management.The Product Manager will work daily with the assigned agile development teams to make sure product development projects remain on schedule as well as accept completed user stories and defect fixes.This role will support pre-sales opportunities and perform market research within assigned market segment and define marketing requirements to assist with product roadmap development.The role requires a broad skill set that leverages experiences in product development, quality assurance, datacenter, service provider and enterprise infrastructure.This includes working side-by-side with the engineering team and other product managers to manage the product development process.The position requires strong analytical and communication skills and the ability to distill the key issues from complex problems.Additionally, the Product Manager will also be integral part of customer issue escalation and problem resolution internal process.We are looking for a self-starter, an individual who can evaluate feature requests and defects quickly and who works well independently as well as within a team.Spirent is its employees.Finding the flexible path to help you realize your passion and ambition is central to our success as a global leader in test and measurement.At Spirent we work together to find the right route to develop your skills and experience, nurturing your curious spirit to find new solutions for our customers and extend your own knowledge.We help you push the boundaries in a culture that gives you the freedom to innovate.Working at the frontiers of next generation technologies opens up new opportunities all the time.And of course life outside work changes too.So we make sure your career path flexes to keep you going in the right direction and at the right speed.Are you innovative enough to work at Spirent?Job Responsibilities: Create and maintain competitive strategy that incorporates detailed knowledge of network cyber security markets, devices (hardware and virtual based), solutions and technologies. Create marketing requirements (MRD) based on customer requirements and translate them into documented use cases and product requirements for engineering. Create user stories, including acceptance criteria, that can be completed within a sprint. Acceptance of user story or defect fix completion by scrum teams. Review and prioritize product and release backlogs. Attend daily scrum meetings to clarify any requirements or defects. Attend iteration preplanning, planning, demo and retrospective meetings. Provide product validation testing assistance as needed to confirm product release candidates. Support pre-sales opportunities via on-site visits, presentations and product demonstrations. Develop product collateral including presentations to sales engineers and easy to understand datasheets for customers. Travel up to 25 % of time.Job Requirements: BS in Computer Science or technical related field. Experience delivering products using Software Development Life Cycle (SDLC) with an Agile/Scrum Process. Demonstrated domain experience in layer 4-7 protocols. Comfortable making presentations and facilitating meetings, both internal &amp; client facing Strong verbal and written communication skills. Ability to learn new technologies related to a wide range of application layer testing including storage, media, and web technologies. Strong interpersonal skills, demonstrated ability to build trust and strong relationships. Strong conceptual, analytical and strategic thinking skills. Experience working in a highly collaborative and dynamic team environment. 3years experience.Qualifications: MS, Computer Science or EE Expertise in TCP/IP networking and Internet technologies including firewalls, web application firewalls, IPS/IDS sensors, remote access (IPsec, SSL VPN) devices as well as anti-malware solutions. Experience with Test &amp; Measurement tools like Spirent, Ixia, Swifttest, etc.Posted by StartWire..

Question	Topic	Difficulty	Ask Chance
Boarding Times Bias	Statistics	Medium	Very High
Hundreds of Hypotheses	Statistics	Medium	Very High
Decreasing Comments	Product Metrics	Easy	Very High

Spirent Communications Interview Questions

Spirent Communications Interview Guides

Spirent Communications Interview Questions

Spirent Communications Opening Jobs