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I applied via Naukri.com and was interviewed in Apr 2022. There was 1 interview round.
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Hashtable is synchronized while hashmap is not.
Hashtable is thread-safe while hashmap is not.
Hashtable does not allow null keys or values while hashmap allows one null key and multiple null values.
Hashtable is slower than hashmap due to synchronization.
Hashtable is a legacy class while hashmap is a newer implementation.
Hashmap is not thread-safe while Concurrent Hashmap is thread-safe.
Hashmap is not suitable for multi-threaded environments as it can lead to race conditions and data inconsistencies.
Concurrent Hashmap allows multiple threads to access and modify the map concurrently without any data inconsistencies.
Concurrent Hashmap uses a technique called lock striping to achieve thread-safety.
Concurrent Hashmap is slower than Hashma...
posted on 16 Apr 2021
I applied via Referral and was interviewed in Oct 2020. There was 1 interview round.
posted on 16 Apr 2021
Implement merge sort and find kth largest element in an array.
Merge sort is a divide and conquer algorithm that recursively divides the array into two halves, sorts them and then merges them.
Kth largest element can be found using quick select algorithm or by sorting the array and returning the kth element from the end.
Merge sort has a time complexity of O(nlogn) and space complexity of O(n).
Quick select has a time comp...
I applied via Campus Placement and was interviewed in May 2021. There was 1 interview round.
I applied via Naukri.com and was interviewed in Mar 2021. There were 3 interview rounds.
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