Applied directly through BrowserStack workday website without referral.
Screening Round [R1]
Started with Introduction and then asked about the projects, to explain high level design of it.
- How does the current tech-stack fit the requirements of the XYZ project from your resume? / Which tech stack you would choose to build the XYZ project.
- Heavy Grilling based on the projects
- RabbitMQ vs redis Queue
- Why MongoDB? Why not PostgreSQL or SQL?
Questions on JS, Nodejs, ExpressJs something like
- Event Loop
- Diff between SetTimeOut and SetIntermediate
- Question on snippet of code JS
- Where is the image source stored? Img tag src=””
- How does the browser download the images? = as batches of 6 to 10 images
What happens when you enter a URL on the browser?
- Expects answer in detail
- TCP/ IP protocol
- 3 way Handshake
- Ports for HTTPS: 443 and HTTP: 80
Simple Problem at the end
Given two huge values as a String and you need to perform an Arithmetic operation
Function perform(String a, String b, String action)
In a Integer, Max value that you can store is 9999 (4 digits)
Test cases:
num1 = "12345678"
num2 = "99999999"
action = "compare"
num1="12349999"
num2="99991111"
BF: to go digit by digit
To optimise we go by chunk by chunk of size 4
Solution: a + b <= maxValue(9999) => a <= maxValue(9999) - b
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