computer - Related information

• With regard to the basic data coding of data communication, which is the multilevel coding in the figure?

  is this 2B1Q? ...

  Computer network

  May.16,2022
• After entering a url, do you first check the browser cache or establish a tcp connection first? Why can't caching be used when the network is off?

  calculate network correlation ...

  Computer network

  Aug.27,2021
• What are the examples of message switching network and packet switching network?

  according to the switching mode, the computer network can be divided into line switching network (Circurt Switching), message switching network (Message Switching), packet switching network (Packet Switching). our commonly used telephones are line-sw...

  Computer network

  Jun.07,2021
• Could you tell me how to calculate the subtraction of negative numbers in the bottom calculation?

  0x80000000, which is the minimum value of shaping, so why 0-0x80000000 or 0x80000000? how exactly is the symbol bit calculated ...

  Computer basic

  May.08,2021
• A > = b is to judge whether an is equal to b or whether an is greater than b first?

  in other words, a > = b equals astatb | | a > b or a > b | | astatableb? ...

  Operator determines-the-principle-of computer

  Mar.14,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b32acb-2b197.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b32acb-2b197.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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