104. Destructors-II

Question.3

A developer controls the scope of interrupt disabling using braces:

void process() {
   // Interrupts enabled here
   {
       InterruptGuard guard; // Interrupts disabled
       critical_operation();
   } // guard destroyed -- interrupts re-enabled
   normal_operation();  // Interrupts enabled again
}

What technique does this demonstrate?

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RAII with scoped lifetime -- the inner braces limit how long interrupts are disabled
Block-scoped variable shadowing
Exception handling with try-catch
Lazy initialization of the guard

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