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This is where you allocate the data that you have. This gives you the opportunity to have everything in order.
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What is the difference between Harvard and modified Harvard architecture?
Harvard architecture:The original Harvard architecture computer, the Harvard Mark I, employed entirely separate memory systems to store instructions and data. The CPU fetched the next instruction and loaded or stored data simultaneously and independently. This is by contrast with a Von Neumann architecture computer, in which both instructions and data are stored in the same memory system and (without the complexity of a cache) must be accessed in turn. The physical separation of instruction and data memory is sometimes held to be the distinguishing feature of modern Harvard architecture computers. However, with entire computer systems being integrated onto single chips, the use of different memory technologies for instructions (e.g. Flash memory) and data (typically read/write memory) in Von Neumann machines is becoming popular. The true distinction of a Harvard machine is that instruction and data memory occupy different address spaces. In other words, a memory address does not uniquely identify a storage location (as it does in a Von Neumann machine); you also need to know the memory space (instruction or data) to which the address applies.Modified Harvard architecture:A pure Harvard architecture computer suffers from the disadvantage that mechanisms must be provided to separately load the program to be executed into instruction memory and any data to be operated upon into data memory. Additionally, modern Harvard architecture machines often use a read-only technology for the instruction memory and read/write technology for the data memory. This allows the computer to begin execution of a pre-loaded program as soon as power is applied. The data memory will at this time be in an unknown state, so it is not possible to provide any kind of pre-defined data values to the program.The solution is to provide a hardware pathway and machine language instructions so that the contents of the instruction memory can be read as if they were data. Initial data values can then be copied from the instruction memory into the data memory when the program starts. If the data is not to be modified (for example, if it is a constant value, such as pi, or a text string), it can be accessed by the running program directly from instruction memory without taking up space in data memory (which is often at a premium).
Why does my camera tell me the memory card is full but there are no images on it?
Memory cards can have any type of data on them. Try putting it in a computer to see if it is full of other data. On the otherhand, maybe the card is defective.
What does a film in a camera do?
It stores the pictures so when you choose to get them developed the memory is still there. Compared to a memory stick of which the data could be erased.
Block diagram of 8257 dma controller?
it is a device to transfer the data directly between io device and memory without through the cpu so it performs a high-speed data transfer between memory and io device
Can phone data could be recoverd even if you remove your memory card and sim?
No, it can't UNLESS you saved some stuff to the phone and not the sim and memory card.
Compare and contrast dynamic memory allocation and the allocation of files in secondary storage?
Static Memory Allocation: Allocating the total memory requirements that a data structure might need all at once without regard for the actual amount needed at execution time. Dynamic Memory Allocation: The opposite strategy of static memory allocation - Dynamic Memory Allocation, involves allocating memory as-needed.
Which languages necessarily need heap allocation in the runtime environment?
Those that allow dynamic data structure
What is the difference between allocation and search data structure?
difference between serch data structure and allocation data structure
Advantages of dynamic memory allocation in data structure?
The main advantage of dynamic memory allocation is flexibility: the sizes of structures (or upper bounds on the sizes) do not need to be known in advance, so any size input that does not exceed available memory is easily handled. There are costs, however. Repeated calls to allocate and de-allocate memory place considerable strain on the operating system and can result in "thrashing" and decreased performance. In addition, one has to be very careful to "clean up" and de-allocate any memory that is allocated dynamically, to avoid memory leaks. The general rule of thumb is, if you can allocate memory statically, do it, because the result will probably be faster code that is easier to debug. But if you need to handle wide-ranging input sizes, then dynamic memory allocation is the way to do it.
Difference between dynamic and static memory allocation?
Static memory allocation is memory allocated on the "stack" and cannot be resized after the initial allocation, while dynamic memory allocation is memory allocated in the "heap", and can be dynamically expanded and shrunk as necessary.
What are the advatages of data structures?
Data structures allow developers to organize smaller pieces of data into one larger construct that can be repeated through dynamic memory allocations, and group this data into one single "pointer" so that memory leaks can be avoided by simplifying memory references. It also leads to more efficient code. For example, a multiplayer game would have a data structure that represents one single player, and then dynamic memory allocation would allow the developers to allocate memory to as many players as necessary. Other common examples are address books, email programs, and spreadsheets.
What is the role of heap in the dynamic memory allocation?
memory allocation has two types : static and dynamic 1) the static are for the data types that will never change in size during the program execution suxh as integers (1 and 1000 will take the same size if we declare them to have the same type). 2) while another data types such as arrays and lists , will grow and shrink during execution time (due to the addition and removing) . the HEAP is the part of the memory where such data (in part 2) are allocated.
Where is Heap located?
A Heap data structure can be located in the computer's memory, either on the stack or heap memory. The Heap memory is a region of a computer's memory space where dynamic memory allocation happens during a program's execution. It is used to store global variables, function pointers, and objects created using dynamic memory allocation.
Can heap implement recursion?
Heap is a data-structure, it cannot implement anything. On the other hand, it is true that: 1. Recursive routines might use heap. 2. You can use dynamic memory allocation (heap), to implement a stack; and use the stack to implement recursion.
What do you understand by static memory allocation and dynamic memory allocation?
MEMORY ALLOCATION MODELS……STATIC MEMORY ALLOCATION DYNAMIC MEMORY ALLOCATIONMemory is allocated before the execution of the program begins.(During Compilation)Memory is allocated during the execution of the program.No memory allocation or deallocation actions are performed during Execution.Memory Bindings are established and destroyed during the Execution.Variables remain permanently allocated.Allocated only when program unit is active.Implemented using stacks and heaps.Implemented using data segments.Pointer is needed to accessing variables.No need of Dynamically allocated pointers.Faster execution than Dynamic.Slower execution than static.More memory Space required.Less Memory space required.
What is memory allocation?
Memory allocation is the act of reserving a chunk of memory for some set of data. In programming terms, this is normally done by declaring a variable. Large arrays of data will require large blocks of contiguous memory, which the programmer must request from the operating system.
What kind of memory loses its data rapidly?
Dynamic RAM
