They asked about:

HashMap and finding vowels in my name

ConcurrentHashMap and hash functions

Difference between == and equals in OOP

SQL joins and writing a query for the second highest value

SQL query to change the column name in the SELECT output (e.g., SELECT id AS number)

Question

They asked about:

HashMap and finding vowels in my name

ConcurrentHashMap and hash functions

Difference between == and equals in OOP

SQL joins and writing a query for the second highest value

SQL query to change the column name in the SELECT output (e.g., SELECT id AS number)

Emgage