PHP

How comparison with NULL affects the result of a SELECT query

Getting departments where only men rated above five

Code restructuring in an online store system

Identify architectural flaws in the provided code

Detect and fix errors in class implementation

Output the ids from table B that are missing in table A

Intern — Middle

МТС

Implementing a phone number field in the Tilda profile form

Development of a standard CI pipeline for a Symfony project

Modifying an array while iterating over it

Error detection in the presented code

Function to clear duplicate values in the 'value' column of a table

Extracting missing identifiers from the second table

Intern — Middle

МТС

Implementing report result caching

Merging two sorted arrays into one

Conversion of AST of an arithmetic expression into a string representation of code

Identifying issues in cache lifetime verification implementation

Message distribution algorithm from multiple queues considering quotas and full channel load

Determining the current user status (online/offline) in a video broadcasting system

Junior — Senior

МТС

Handler and sorter of a potentially infinite stream of natural numbers

Checking the correctness of nested brackets