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Interview prep

Delphi

In an interview, Delphi usually means questions about maintaining and modernizing a large application: how the language and memory work, how the VCL handles data and threads, and how to move old code to a modern version without stopping the business.

Before this category: Types and memory (for comparison with .NET).

Object PascalTypes, classes and records, memory management, interfaces and reference counting, the modern language: generics, anonymous methods, RTTI.
VCL and data accessForms and components, .dfm, TDataSet, ADO and FireDAC, stored procedures, threads and the UI.
Migrating Delphi 6 → 12/13Unicode, moving from ADO to FireDAC, 64-bit, a strategy for a large client, moving features to .NET.