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Senior Frontend Engineer Interview Questions

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1,539 senior frontend engineer interview questions shared by candidates

5. HIRING MANAGER INTERVEW (1 hour, Zoom). Two interviews in one: one part was a traditional interview describing my experience and why I wanted to work for Datadog and what I wanted to do at Datadog, and the other part was the presentation of a project that I had worked on in the past. They wanted to see that I had a sense of ownership of the project, that I had experience working across teams, that I was capable of leading a team and being the point person for implementing a technically challenging solution. They wanted to know how I navigated the difficulties of heading a project. I prepared a diagram ahead of time using excalidraw to explain the technical aspects and architecture to make things go a bit smoother.
avatar

Senior Software Engineer - Frontend

Interviewed at Datadog

4★
Aug 4, 2023

5. HIRING MANAGER INTERVEW (1 hour, Zoom). Two interviews in one: one part was a traditional interview describing my experience and why I wanted to work for Datadog and what I wanted to do at Datadog, and the other part was the presentation of a project that I had worked on in the past. They wanted to see that I had a sense of ownership of the project, that I had experience working across teams, that I was capable of leading a team and being the point person for implementing a technically challenging solution. They wanted to know how I navigated the difficulties of heading a project. I prepared a diagram ahead of time using excalidraw to explain the technical aspects and architecture to make things go a bit smoother.

You have an in-memory tree data structure. each node can have multiple children (can be more than 2). it's not search or balanced. Task: serialize it to a file so that you can deserialize it later with the same structure node values can be just any integers
avatar

Senior FrontEnd Engineer

Interviewed at Microsoft

4★
May 4, 2016

You have an in-memory tree data structure. each node can have multiple children (can be more than 2). it's not search or balanced. Task: serialize it to a file so that you can deserialize it later with the same structure node values can be just any integers

1. Given binary matrix write algorithm to find rectangle with largest area. e.g. [ [1,0,0,0] [0,1,1,1] [0,1,1,1] [0,0,0,0] 2. Analog to MS paint where you click a point, and all connected areas are auto filled with a color, you're given a matrix/grid with random number in it, so write a function that takes as parameters: canvas (matrix), x/y coordinates, and the color number to replace with. e.g. coordinates: 1,3, newColor:3 [[0,1,1,2,0,1] [1,0,2,2,1,1] [1,0,2,2,2,0]] so all adjacent 2's should be replaced with 3 3. Design front-end for an online chess game 4. Manager interview, just conversation about the interview process and about your background
avatar

Senior Software Engineer - Frontend

Interviewed at Microsoft

4★
May 7, 2022

1. Given binary matrix write algorithm to find rectangle with largest area. e.g. [ [1,0,0,0] [0,1,1,1] [0,1,1,1] [0,0,0,0] 2. Analog to MS paint where you click a point, and all connected areas are auto filled with a color, you're given a matrix/grid with random number in it, so write a function that takes as parameters: canvas (matrix), x/y coordinates, and the color number to replace with. e.g. coordinates: 1,3, newColor:3 [[0,1,1,2,0,1] [1,0,2,2,1,1] [1,0,2,2,2,0]] so all adjacent 2's should be replaced with 3 3. Design front-end for an online chess game 4. Manager interview, just conversation about the interview process and about your background

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