Video: Dab tsi yog qhov sib txawv ntawm qhov cuam tshuam thiab txheej txheem?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Tig thiab txheej txheem ob leeg ua ib txoj haujlwm tshwj xeeb ntawm lawv qhov kev ua tiav. Qhov tseem ceeb Qhov sib txawv ntawm Kev Tshawb Fawb thiab Txheej Txheem yog tus Ua rau executes cia li tshwm sim ntawm ib qho kev tshwm sim whereas, lub Txheej txheem raug tua thaum nws tau hais meej meej.
Kuj nug, qhov twg yog qhov zoo dua los yog cov txheej txheem khaws cia?
Peb tuaj yeem ua tiav a khaws cov txheej txheem thaum twg peb xav nrog kev pab los ntawm exec hais kom ua, tab sis a ua rau tsuas tuaj yeem raug tua thaum twg ib qho kev tshwm sim (ntxig, rho tawm, thiab hloov tshiab) raug rho tawm haujlwm ntawm lub rooj uas ua rau yog txhais. Cov txheej txheem khaws cia muaj peev xwm coj input parameter, tab sis peb tsis tuaj yeem hla tsis tau raws li cov tswv yim rau a ua rau.
Ib yam li ntawd, cov txheej txheem ua haujlwm thiab qhov tshwm sim yog dab tsi? Cov txheej txheem tsis rov qab muaj txiaj ntsig lawv tsuas yog tau txais cov ntsuas thiab ua qee yam nrog lawv, muaj nuj nqi ua tib yam los ntawm lawv kuj tuaj yeem xa rov qab koj tus nqi raws li lawv txoj haujlwm. Ua rau yog hom kev tshwm sim handlers uas hnov txog qhov kev txiav txim uas koj xav tau thiab pib txheej txheem thaum qhov kev txiav txim no tshwm sim.
Ib yam li ntawd, nws raug nug, dab tsi yog tus txheej txheem trigger?
(n.) Hauv DBMS, a ua rau yog SQL txheej txheem uas pib ib qho kev nqis tes ua (piv txwv li, tua hluav taws) thaum muaj xwm txheej (INSERT, DELETE lossis UPDATE) tshwm sim. Txij li thaum ua rau yog cov xwm txheej-tsav tshwj xeeb cov txheej txheem , lawv tau khaws cia rau hauv thiab tswj hwm los ntawm DBMS.
Dab tsi yog qhov sib txawv ntawm qhov ua rau?
Hom Kev Txhaum Cai . Hauv SQL Server peb tuaj yeem tsim plaub hom kev cuam tshuam Cov Lus Txhais Lus (DDL) ua rau , Data Manipulation Language (DML) ua rau , CLR ua rau , thiab Logon ua rau.
Pom zoo:
Dab tsi yog qhov txawv ntawm qhov xwm txheej thiab qhov xwm txheej hauv ITIL?
Qhov sib txawv ntawm cov xwm txheej thiab xwm txheej hauv ITIL Ib qho xwm txheej yog kev cuam tshuam uas tsis tau npaj tseg lossis txo qis hauv kev ua haujlwm ntawm IT kev pabcuam. Ib qho kev tshwm sim yog qhov hloov me ntsis hauv lub xeev ntawm cov kab ke lossis kev pabcuam hauv IT infrastructure
Dab tsi yog qhov haujlwm ntawm OSI txheej txheej txheej txheej txheej txheem router ua haujlwm li cas?
Hauv Cov Qauv Qhib Kev Sib Txuas Sib Txuas (OSI) kev sib txuas lus, txheej txheej txheej txheem nyob ntawm Txheej 5 thiab tswj kev teeb tsa thiab rhuav tshem ntawm kev sib txuas ntawm ob qhov kev sib txuas lus kawg. Kev sib txuas lus ntawm ob qhov kawg yog hu ua kev sib txuas
Dab tsi yog qhov sib txawv ntawm cov txheej txheem programming thiab modular programming?
Structured programming yog qib qis ntawm coding hauv txoj kev ntse, thiab kev ua haujlwm modular yog qib siab dua. Modular programming yog hais txog kev sib cais qhov chaw ntawm cov kev pab cuam rau hauv kev ywj pheej thiab hloov pauv tau, los txhim kho kev sim, kev tswj xyuas, kev sib cais ntawm kev txhawj xeeb thiab rov siv dua
Dab tsi yog qhov zoo sib xws thiab qhov txawv ntawm relays thiab PLC yog dab tsi?
Relays yog electro-mechanical keyboards uas muaj coil thiab ob hom kev sib cuag uas tsis yog NO & NC. Tab sis Programmable Logic Controller, PLC yog lub khoos phis tawj me uas tuaj yeem txiav txim siab raws li qhov kev zov me nyuam thiab nws cov tswv yim & tso tawm
Dab tsi yog qhov sib txawv tseem ceeb ntawm kev sib txuas lus tsis sib xws thiab kev sib txuas lus taw qhia?
1. Hauv kev sib txuas lus tsis muaj kev sib txuas lus tsis tas yuav tsim kev sib txuas ntawm qhov chaw (sender) thiab qhov chaw (receiver). Tab sis nyob rau hauv kev sib txuas-taw qhia kev sib txuas lus kev sib txuas lus yuav tsum tau tsim ua ntej hloov cov ntaub ntawv