what is the basic difference between direct and sequential memory access?
242394
"Sequential access must begin at the beginning and access each element in order, one after the other. Direct access allows the access of any element directly by locating it by its index number or address. Arrays allow direct access. Magnetic tape has only sequential access, but CDs had direct access.
537053
Difference between DDR2 and DDR3. DDR2 and DDR3 are types of RAM, Random Access Memory. DDR RAM offers speed of 1600 MB/s, DDR2 RAM offers speed of 3200 MB/s and DDR3 offers speed of 6400 MB/s.
766897
Most modern processors do not address memory at the granularity of single bits but limit the size of the smallest chunk of memory that can be accessed to an 8-bit byte. This is called byte-addressable memory. With byte-addressable memory, a 24-bit immediate could directly address any of 224 bytes, i.e., 16 MiB.
1189474
The first sequence performs an operation using DATA1 as operand; the second perform using DATA2. They can be considered to perform the same operation with a variable parameter or argument. Such a parameter is called a macro instruction argument, or dummy argument.
352917
Memory Management in Windows uses Tree data structure and Linux uses Linked List data structure. Windows uses Cluster demand Paging where the pages are bought only when they are needed but simultaneously. Linux uses Demand paging where the pages will not be swapped from disk to RAM until they are needed.
1103854
The distinction is very important in traditional disk-based systems, where each disk seek will take around 10ms. Sequentially writing data to that same disk takes about 30ms per MB. ... As each random write gets smaller, you pay more and more of a penalty for the disk seeks.
1270635
It's programmable (ie you can set the contents ONCE, after that you'll need to erase it again) And it's a read only memory because it's non-volatile (state preserved through loss of power) and you cannot write to it like a typical SRAM. In fact you can only selectively flip bits in one direction - from 0 to 1.
961055
The data memory type may be used to declare variables only. ... This memory is directly accessed using 8-bit addresses and is the on-chip RAM of the 8051. It has the shortest (fastest) access time but the amount of data is limited in size (to 128 bytes or less). Variables declared data are located in the DATA memory class.
767853
Instructions are stored in memory and the contents of the PC register are used as the starting address from where the next to be executed instruction is read. Because the length of an 68k instruction is bytes can vary decoding and reading the instruction from memory (steps 1 and 2) is an iterative process.
371807
Sequential access means given an element, I can access the next one, or maybe the previous one, just as easily as accessing the given element. Eg: linked list. Random/direct access means given an element, I can access any other element in the structure just as easily.
1123120
Direct mapping maps each block of main memory into only one possible cache line. Associative mapping permits each main memory block to be loaded into any line of the cache. The set-associative mapping combines both methods while decreasing disadvantages.
272384
The difference between static and dynamic memory allocation is that in static memory allocation once the memory is allocated, the memory size is fixed while in dynamic memory allocation, once the memory is allocated, the memory size can be changed.
1346825
"Sequential access must begin at the beginning and access each element in order, one after the other. Direct access allows the access of any element directly by locating it by its index number or address. ... If you are on a railroad train, to go from one car to another you must use sequential access.
813650
Basically, an array is a set of similar data objects stored in sequential memory locations under a common heading or a variable name. ... While a linked list is a data structure which contains a sequence of the elements where each element is linked to its next element.
135151
There are two main types of RAM: Dynamic RAM (DRAM) and Static RAM (SRAM). ... It keeps data in the memory as long as power is supplied to the system unlike DRAM, which has to be refreshed periodically. As such, SRAM is faster but also more expensive, making DRAM the more prevalent memory in computer systems.
174397
There is no difference. RAM is RAM is RAM. Some RAM is faster or has tighter timings but it's still just RAM. With the last few generations of CPUs from both Intel and AMD the memory controller is on the CPU and there is very little benefit from high speed memory except in certain specific applications.
305204
The 1-byte instruction has an opcode alone. The 2 bytes instruction has an opcode followed by an eight-bit address or data. ... While storing the 3 bytes instruction in memory, the sequence of storage is, opcode first followed by low byte of address or data and then high byte of address or data.