Cognex Software Engineer Interview Questions
& Process
Real candidates share what happened, how many rounds they had,
and how the experience turned out.
Based on 37 interview experiences · FREE TO READ
Candidate interview experiences
First-hand accounts from people who interviewed at Cognex.
Cognex
Software Engineer
Entry Average Neutral experience No offer 2 rounds
Interview process
Recruiter call Phone screen
Interview formats
Technical Coding
Started with an email exchange and then a phone call with HR where they asked about my background. Next was a technical phone call where they asked about my background in computer vision and programming. This part included the only programming question I got. I didn't do well on it, which was a bummer since I should have known it. They were going to schedule a programming test, but after I followed up a few days later, HR sent me a rejection email. I feel like that question is super common for them, so I should've nailed it, but they also judged me pretty quickly based on just that one question. I was hoping for a wider variety of questions.
Confirmed questions1 question
- What does the expression *a++ = *b++ mean and how does it function?
Cognex
Software Engineer
Entry Easy Positive experience No offer 3 rounds
Interview process
Recruiter call Technical screen Onsite
Interview formats
Coding Technical Behavioral
I had a recruiter call first, lasted about 40 minutes with general questions. Then after two weeks, I got called for an in-person interview at the company office. This interview was pretty long, over 3 hours, from 8:15 am to 11:35 am. It was split into three parts: first, a C test with 5 questions (4 regular + 1 bonus), then an interview with a senior software engineer and a software engineer, and finally, an interview with the departmental manager.
Confirmed questions5 questions
- What are the keywords static, volatile, and register?
- Can you reverse a string without using extra memory?
- Determine the values of i, j, p, and q given the C code and the MAX macro.
Cognex
Software Engineer
Senior Average Positive experience Accept offer 11 rounds
Interview process
Recruiter call Phone screen Technical screen Onsite Presentation
Interview formats
Behavioral Technical Coding Presentation
The interview process started with a telephonic interview with the hiring manager, followed by another telephonic interview with the product manager. After that, there was a Skype interview that focused on coding. The final stage was a full-day interview, which consisted of 8 separate interviews with various team members from two different teams. All these interviews were technical. To conclude, I had to deliver a technical presentation.
Confirmed questions1 question
- Could you explain steerable filters for Gaussian 2D filtering?
Cognex Software Engineer Interview Questions
Quoted word for word from Cognex interview reports.
“Can you reverse a string without using extra memory?”
Read reports →“Regarding C pointers, what's the point of the line "a++=b++" when both 'a' and 'b' are pointers?”
Read reports →“What is a hash algorithm to search for the number of alphabets in a string?”
Read reports →“What is the result of '*i++ = *j++'?”
Read reports →“What does the expression *a++ = *b++ mean and how does it function?”
Read report →“Find the bugs in this C++ code, which has memory leaks.”
Read report →“Regarding the code ++*f = ++*g;, what would be the outcome?”
Read report →“What is the difference between a process and thread?”
Read report →“What is the increment and decrement operator in c++?”
Read report →Formats, difficulty and experience
Across all 37 Cognex interview reports.