Memory Management in iOS Apps

Explain how memory management works in iOS applications. Cover ARC, strong/weak/unowned references, common sources of retain cycles, and how you prevent leaks or excessive memory use in practice.

Problem

Explain how memory management works in iOS applications. Cover ARC, strong/weak/unowned references, common sources of retain cycles, and how you prevent leaks or excessive memory use in practice.

What to Cover

How ARC manages object lifetime
When to use strong, weak, and unowned
How retain cycles happen in delegates, closures, and timers
How to detect and debug memory issues
How to reduce memory footprint beyond just fixing leaks

Strong Answer Signals

Explains ownership clearly

Uses a concrete retain-cycle example

Distinguishes leaks from high memory usage

Mentions debugging tools like Memory Graph or Instruments

Problem

Explain how memory management works in iOS applications. Cover ARC, strong/weak/unowned references, common sources of retain cycles, and how you prevent leaks or excessive memory use in practice.

What to Cover

How ARC manages object lifetime
When to use strong, weak, and unowned
How retain cycles happen in delegates, closures, and timers
How to detect and debug memory issues
How to reduce memory footprint beyond just fixing leaks

Strong Answer Signals

Explains ownership clearly

Uses a concrete retain-cycle example

Distinguishes leaks from high memory usage

Mentions debugging tools like Memory Graph or Instruments

Problem

Explain how memory management works in iOS applications. Cover ARC, strong/weak/unowned references, common sources of retain cycles, and how you prevent leaks or excessive memory use in practice.

What to Cover

How ARC manages object lifetime
When to use strong, weak, and unowned
How retain cycles happen in delegates, closures, and timers
How to detect and debug memory issues
How to reduce memory footprint beyond just fixing leaks

Strong Answer Signals

Explains ownership clearly

Uses a concrete retain-cycle example

Distinguishes leaks from high memory usage

Mentions debugging tools like Memory Graph or Instruments

Interview Guides

Problem

What to Cover

Strong Answer Signals

Problem

What to Cover

Strong Answer Signals

Memory Management in iOS Apps

Problem

What to Cover

Strong Answer Signals

Problem

What to Cover

Strong Answer Signals