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PHP interfaces are a way to define a contract for classes to implement specific methods.
Interfaces in PHP are similar to abstract classes but cannot have any implementation.
Classes can implement multiple interfaces in PHP.
Interfaces are declared using the 'interface' keyword.
All methods declared in an interface must be public.
Interfaces can be used to enforce a specific structure for classes to follow.
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I was interviewed in Jul 2024.
Different constraints and join methods in database queries
Constraints in database queries ensure data integrity and enforce rules on data
Join methods in database queries are used to combine rows from two or more tables based on a related column between them
Examples of constraints include primary key, foreign key, unique key, and check constraints
Examples of join methods include inner join, outer join (left, right, full
It was mostly on sub queries.
A SQL join is used to combine rows from two or more tables based on a related column between them.
Use the JOIN keyword to specify the tables to be joined
Use the ON keyword to specify the column to join on
Types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN
Two common SQL joins are INNER JOIN and LEFT JOIN.
INNER JOIN: Returns rows when there is at least one match in both tables.
LEFT JOIN: Returns all rows from the left table and the matched rows from the right table.
posted on 19 Sep 2022
I applied via Naukri.com and was interviewed before Sep 2021. There were 4 interview rounds.
posted on 4 Sep 2024
On risk assessment and as well as case study
I applied via Recruitment Consulltant and was interviewed in Sep 2023. There were 2 interview rounds.
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