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I appeared for an interview in Oct 2024, where I was asked the following questions.
Hashing is a technique used to map data to a fixed-size array, collision occurs when two different inputs produce the same hash value.
Hashing involves using a hash function to map data to a fixed-size array.
Collision happens when two different inputs produce the same hash value.
Common techniques to handle collisions include chaining and open addressing.
No, time complexity of HashMap is not always O(1).
Time complexity of HashMap is O(1) on average, but can degrade to O(n) in worst case scenarios.
Worst case scenarios include hash collisions, which can lead to linear probing and degrade performance.
Load factor and capacity of the HashMap can also affect time complexity.
In scenarios where many keys hash to the same index, the time complexity can degrade.
Common coding problems difficulty laver moderate
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I applied via Referral and was interviewed in Sep 2024. There were 2 interview rounds.
Node.js is a runtime environment that allows you to run JavaScript on the server side.
Node.js is built on Chrome's V8 JavaScript engine.
It uses an event-driven, non-blocking I/O model that makes it lightweight and efficient.
Node.js is commonly used for building server-side applications, APIs, and real-time applications.
It has a large ecosystem of libraries and frameworks, such as Express.js and Socket.io.
In Node.js, timers can be implemented using functions like setTimeout() and setInterval().
Use setTimeout() to execute a function once after a specified delay
Use setInterval() to execute a function repeatedly at a specified interval
Clear a timer using clearTimeout() or clearInterval()
Example: setTimeout(() => { console.log('Timer executed!'); }, 2000);
I applied via Campus Placement and was interviewed before May 2023. There were 2 interview rounds.
Medium to hard level questions were asked and that mostly covers basics of DSA
Hackerrank test basic kotlin and android
I appeared for an interview before May 2024, where I was asked the following questions.
I applied via Naukri.com and was interviewed in May 2021. There were 5 interview rounds.
Simple string manipulation
I applied via Referral and was interviewed before Apr 2023. There were 3 interview rounds.
MCQ on Python and some aptitude questions.
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