if 256k*8bit memory chips are used to form memory areas from 4000 0000H to 400F FFFFH and addressed by bytes, () chips are required.
(A). 4
(B). 8
(C). 16
(D). 32
ask for advice, how to calculate it?
if 256k*8bit memory chips are used to form memory areas from 4000 0000H to 400F FFFFH and addressed by bytes, () chips are required.
(A). 4
(B). 8
(C). 16
(D). 32
ask for advice, how to calculate it?
4000 0000H to 400F FFFFH total 2 ^ 20 = 1m bytes
1M/256K=4
it has been so long since I finished the exam that I forgot how to do such a simple question
Previous: How VsCode sets different color themes for the sidebar and the editing interface.
Next: Mongodb import json file reported the following error, help solve?
I want to implement a function of regular reconnection after a failed database connection, but I don t know why there is a memory leak, so I d like to ask the gods. to make it easier to ask questions, I tidied up the code, connected to the database d...
the middle tier I started with node (koa) has a lot of timeouts from the very beginning. I wrote the timeout control myself. At first, I wrote the timeout, then the request grew, the timeout also increased, and finally I reached several hours, and then I...
is it faster to cut and paste or copy and paste in Windows? Why? What is the principle of operation? ...
import java.util.ArrayList; import java.util.List; public class Main { ThreadLocal<Integer> threadLocal = new ThreadLocal<>(); int i; public void increment() { iPP; } public static void main(String[] args) { ...
in working memory, there are method stack frames and registers. Pc, is understandable, but why should some referenced main memory variables be copied to working memory? I don t think it s necessary at all, which leads to cache consistency problems. Or...
is there a special situation that makes memory slower than disk? Like a page break? ...
listen to Daniel s iOS performance sharing, Why, the memory performance of the simulator that comes with Mac is strong. data in the third row, visually RAM. the random access memory capacity of iPhoneX is 3G the random access memory capacity of ge...
We usually new an object, and the process of requesting memory is completed by operator new, so how does allocator in stl take over operator new to complete the memory request? How is the memory request right of an object transferred? I don t think oper...
The function of placement new is to perform the construction of objects on the memory allocated by operator new, so did new operator use placement new after using operator new to request memory? If not, how is it constructed? Does it have anything to do ...
background: on 64-bit operating system example: define 2 stuct objects with the same members (in different order) and print package main import "unsafe" type A struct { X bool Y float64 Z int16 } type B struct { Y float64...
in most cases in JAVA, objects are allocated in Eden by default, and when GC is triggered, if there is not enough space in survivor, it will be put into the old age. suppose the following scenario: eden:80M survivor1:10M survivor2:10M now survivor2 is...
NSURL *receiptURL = [[NSBundle mainBundle] appStoreReceiptURL]; NSData *receiptData = [NSData dataWithContentsOfURL:receiptURL]; post NSDictionary *dict = @{@"receipt-data": [receiptData base64EncodedStringWithOptions:0]}; dict Te...
when using Lucene to build an index, the IndexWriter object is too large to lead to memory overflow, but my IndexWriter has been created by declaring temporary variables, but after each execution of the IndexWriter.addDocument () method, the size of the ...
The example on memory Management of MDN mentions that JavaScript may decide not to allocate memory and does not know how to understand it: var s = "azerty"; var s2 = s.substr(0, 3); s2 JavaScript [0-3] var a = ["ouais ...
as shown in the picture, just opening the impression note takes up so much memory, what is it doing? ...
Use the top command to check memory under linux. at first it seems to be stable at 800m, but the memory increases by 23m every ten minutes or so. it is suspected that there is a memory leak, and it is normal and stable to use visualVM to observe the...
RT. Vue + Element single-page application, each route switch or refresh page memory will increase, especially the IE browser, simply soar, the operation will directly collapse at first thought that the plug-in does not have .browse () reason, but af...
RT, in a 64-bit system, assuming that the actual memory is 3GB, what happens if the program requests 6GB memory and writes to the requested memory? ...
Hello, prawns! free -m: topfreenmonCommit_ASActive================================================================ proc meminfo: in https: blog.famzah.net 2014 ., the author mentions a formula: MemTotal = MemFree + Buffers + Cached + SwapC...
terminate called after throwing an instance of std::system_error what (): Resource temporarily unavailable The code throws this error and then terminates what s going on ...