KwickClips Cyber Safety and Ethics · 43 sec · free
Which constructor runs first?
Short answer. The base one.
Which destructor runs first?
The derived one.
B is derived from A
| 1. A() base constructor |
| 2. B() derived constructor |
| 3. ~B() derived destructor |
| 4. ~A() base destructor |
Remember
| Constructors: base first |
| Destructors: derived first |
Base or derived, whose constructor runs first? B is derived from A. First the A constructor runs. Then the B constructor runs. At the end, tilde B runs. Tilde A runs last. Constructors run base first. Destructors run derived first.
This clip is from the full lesson: Inheritance: Extending Classes — 8 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: NIOS Senior Secondary Computer Science (330), Programming All levels C++
More KwickClips from this lesson
Which is the parent?42 sec
What mode does a class use if none is written?41 sec
What does multiple mean?40 secDisclaimer. KwickAcademy is free study material for general learning and revision. Parts of it, including the voice-over, are produced with the help of AI tools and may contain errors; if you spot one, please tell us and we will correct it. Syllabus, marks and exam details follow the latest official board publications available to us, and boards can change them at any time, so always confirm against your board's official website and your school. Using this material does not guarantee any marks or result. Board names and trademarks belong to their owners; Kwickprep is not affiliated with or endorsed by any examination board. We never ask for passwords, OTPs or ID numbers. Your progress is saved only in this browser. Full disclaimer · Privacy