Podcast
Questions and Answers
What happens when the main memory is full in iOS?
What happens when the main memory is full in iOS?
- The system automatically reboots.
- No impact on the system.
- Virtual memory is disabled.
- Processes are terminated until there is enough free memory. (correct)
Why does Android not write memory pages back to flash storage on mobile devices?
Why does Android not write memory pages back to flash storage on mobile devices?
- It improves system performance significantly.
- It drains the battery and shortens flash storage lifespan. (correct)
- It speeds up disk access.
- It helps in reducing virtual memory.
What occurs when a process needs to use memory in a memory page that triggers a page fault?
What occurs when a process needs to use memory in a memory page that triggers a page fault?
- The memory page is mapped to a vacant memory frame. (correct)
- The process terminates immediately.
- The memory page is stored in flash storage.
- The system crashes.
Why do virtual memory addresses differ from physical addresses?
Why do virtual memory addresses differ from physical addresses?
What can lead to thrashing in a system?
What can lead to thrashing in a system?
Why must other pages be stored on disk before loading new memory pages?
Why must other pages be stored on disk before loading new memory pages?
What happens to the stack each time a function is called?
What happens to the stack each time a function is called?
Which memory area in C++ grows when memory is allocated with 'new'?
Which memory area in C++ grows when memory is allocated with 'new'?
What is the consequence of a program exceeding its maximum stack size?
What is the consequence of a program exceeding its maximum stack size?
In which direction does the heap generally grow in memory?
In which direction does the heap generally grow in memory?
Which memory area is shared among all threads in a running process?
Which memory area is shared among all threads in a running process?
What condition is very unlikely to occur when allocating memory from the stack?
What condition is very unlikely to occur when allocating memory from the stack?
What happens when a process accesses memory at a virtual address that is not backed by physical memory?
What happens when a process accesses memory at a virtual address that is not backed by physical memory?
What is the purpose of dividing the address space into fixed-size blocks called memory pages?
What is the purpose of dividing the address space into fixed-size blocks called memory pages?
What happens if a memory page needs to be evicted from main memory but has not been modified?
What happens if a memory page needs to be evicted from main memory but has not been modified?
What is the consequence of having no more available page frames in main memory?
What is the consequence of having no more available page frames in main memory?
Which hardware exception occurs when a memory page is not mapped in the main memory?
Which hardware exception occurs when a memory page is not mapped in the main memory?
What distinguishes iOS's handling of virtual memory from systems that support paging?
What distinguishes iOS's handling of virtual memory from systems that support paging?
What is the main purpose of the custom allocator discussed in the text?
What is the main purpose of the custom allocator discussed in the text?
What is the primary role of the functions allocate() and deallocate() in the custom allocator?
What is the primary role of the functions allocate() and deallocate() in the custom allocator?
What does the rebind struct within the custom allocator template aim to do?
What does the rebind struct within the custom allocator template aim to do?
How are instances of ShortAlloc compared to ensure they are using the same arena?
How are instances of ShortAlloc compared to ensure they are using the same arena?
Why is it beneficial to use an allocator and arena with a standard container?
Why is it beneficial to use an allocator and arena with a standard container?
What is the primary state that the custom allocator holds?
What is the primary state that the custom allocator holds?
What is the main characteristic of the Mallocator struct described in the text?
What is the main characteristic of the Mallocator struct described in the text?
Which global functions are primarily used by the Mallocator struct for allocation and deallocation?
Which global functions are primarily used by the Mallocator struct for allocation and deallocation?
What should be done when deallocating memory allocated with Mallocator?
What should be done when deallocating memory allocated with Mallocator?
Why is a stateless allocator considered the least complicated allocator to write?
Why is a stateless allocator considered the least complicated allocator to write?
What makes a stateful allocator more preferable than a stateless allocator in certain scenarios?
What makes a stateful allocator more preferable than a stateless allocator in certain scenarios?
How does the implementation of the arena class relate to the concept of stateful allocators?
How does the implementation of the arena class relate to the concept of stateful allocators?
