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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 Feb 2022. There were 3 interview rounds.
posted on 13 Jul 2024
I applied via Referral and was interviewed in Jan 2024. There were 2 interview rounds.
I applied via Naukri.com and was interviewed before May 2023. There were 2 interview rounds.
I applied via Naukri.com and was interviewed in Feb 2022. There were 3 interview rounds.
posted on 12 May 2021
based on 1 interview
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Senior Software Engineer
461
salaries
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245
salaries
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185
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salaries
| ₹14.1 L/yr - ₹40 L/yr |
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