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HashMap is not thread-safe while ConcurrentHashMap is thread-safe.
HashMap is not thread-safe and can lead to ConcurrentModificationException if modified during iteration.
ConcurrentHashMap allows concurrent read and write operations without the need for external synchronization.
ConcurrentHashMap achieves thread-safety by dividing the map into segments, allowing multiple threads to operate on different segments concurren
To find the third highest salary in a SQL table, use the 'SELECT DISTINCT' statement with 'ORDER BY' and 'LIMIT'.
Use 'SELECT DISTINCT' to avoid duplicates
Order the salaries in descending order using 'ORDER BY'
Use 'LIMIT 2,1' to skip the first two highest salaries and retrieve the third highest salary
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I applied via Naukri.com and was interviewed in Mar 2021. There were 3 interview rounds.
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I appeared for an interview in Aug 2020.
Remove duplicate entries from array of strings using JavaScript
Use Set to remove duplicates
Convert Set back to array
Use spread operator to convert Set to array
Determines if words in given array are anagram or not using JS
Create a function that takes an array of strings as input
Loop through the array and sort each string alphabetically
Compare the sorted strings to check if they are equal
Return true if all strings are anagrams, else false
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