Engineer Interview Questions | Glassdoor

# Engineer Interview Questions

Engineers are responsible for designing and building products. In an interview context, expect to be quizzed on your technical skills, and also evaluated for your ability to work as a part of a team to get things built. The specific questions you are asked will depend on what type of engineering position you are looking for. Try a specific engineering discipline, such as software engineer, electrical engineer, or mechanical engineer.

## Top Interview Questions

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### Associate RF Engineer at C Squared Systems was asked...

Feb 11, 2015
 What is DAS?2 AnswersDistrusted Antenna System its for indoors, stadium, venues, and airports."Distributed Antenna System". Allows cellular carriers to extend cell phone coverage in buildings, stadiums, airports, etc.

### Computer Vision/Machine Learning Software Engineer at Gauss Surgical was asked...

Jun 17, 2014
 Why does one use MSE as a measure of quality. What is the scientific/mathematical reason for the same?2 AnswersMean-Square error is an error metric for measuring image or video quality it is popular video and image quality metric because the analysis and mathematics is easier with this L2-Norm metric. Most video and image quality experts will agree that MSE is not a very good measure of perceptual video and image quality.The mathematical reasoning behind the MSE is as follows: For any real applications, noise in the readings or the labels is inevitable. We generally assume this noise follows Gaussian distribution and this holds perfectly well for most of the real applications. Considering 'e' follows gaussian distribution in y=f(x) + e and calculating the MLE, we get MSE which is also L2 distance. Note: Assuming some other noise distribution may lead to other MLE estimate which will not be MSE.

### Java Software Engineer at Help Scout was asked...

May 24, 2016
 Write a method to determine if a string starts with an uppercase letter.1 Answerwouldn't it just be return string.charAt(0) == string.charAt(0).toLowerCase()

### Mechanical Engineer at Tesla was asked...

Sep 7, 2015
 Asked how the strength to weight ratio of aluminum and steel compared.1 Answerstrength-to-weight ratio in typically the material's strength (which is force per unit area upon failure) divided by its density. Aluminum has a tensile strength of 572 MPa and a density of 2.81 g/cm^3 which computes to . Steel, on the other hand has a tensile strength of 505 MPa and a density of 8.00 g/cm^3. So, as can be seen, aluminum has a higher strength-to-weight ratio than steel

### IOS Developer Engineer at DeNA was asked...

Jan 13, 2014
 What are the App states. Explain them?1 AnswerActive: app is foreground Background: app is not foreground but still executing codes Inactive: app is suspended

### Product Design Engineer at Apple was asked...

Jun 13, 2016
 What are 5 different variables of a coil spring you can change to affect spring force?1 AnswerMaterial, wire diameter, wire cross sectional shape, coil diameter, coil length

May 7, 2015

### Devops/Operations Engineer at Roblox was asked...

Sep 17, 2015
 Q: How would you architect a service that would detect and protect nodes that were being attacked by bots?1 AnswerI think the answer could be using module_evasive , as it detects the DoS attacks and prevents them by not accepting requests from that client.