Video: Muaj pes tsawg lub ntsiab lus tseem ceeb tam sim no tau txhais hauv Java lus Mcq?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Hauv Java programming lus , a Lo lus tseem ceeb yog ib qho ntawm 51 tseg lus uas muaj predefined lub ntsiab lus hauv lus ; vim qhov no, programmers tsis tuaj yeem siv lo lus tseem ceeb raws li cov npe sib txawv, txoj hauv kev, cov chav kawm, lossis lwm yam kev txheeb xyuas. Ntawm no 51 lo lus tseem ceeb , 49 yog siv thiab 2 tsis siv.
Tom qab ntawd, cov lus tseem ceeb hauv Java yog dab tsi?
Java reserved lus. Java reserved lus yog cov ntsiab lus uas tau tseg los ntawm Java ua haujlwm lossis lwm yam kev siv uas tsis tuaj yeem siv los ua tus cim (xws li, sib txawv npe, function names, class names). Yog hais tias ib tug reserved lo lus twb siv raws li ib tug sib txawv , koj yuav tau txais ib qho yuam kev los yog npaj txhij txog qhov tshwm sim.
Ib sab saum toj no, yog sau cov lus tseg hauv Java? Java Reserved Keywords List . tseeb, cuav thiab null tsis yog tseg lus tab sis tsis tuaj yeem siv los ua tus cim, vim tias nws yog cov ntawv ntawm cov khoom tsim hauv.
Kuj Paub, lo lus tseem ceeb hauv Java yog dab tsi?
interface yog ib lo lus tseem ceeb siv tau. Kev xaiv B tsis yog vim tias txawm tias "String" yog a chav kawm hom hauv Java, "txoj hlua" tsis yog lo lus tseem ceeb. Option C tsis yog vim " ntab "yog a chav kawm hom. Lo lus tseem ceeb rau Java primitive yog ntab.
Puas yog lub ntsiab lus tseem ceeb hauv Java?
Java default lo lus tseem ceeb . A Java default lo lus tseem ceeb yog ib qho kev hloov kho nkag. Yog hais tias koj tsis tau muab ib qho kev hloov kho rau cov hloov pauv, txoj hauv kev, tus tsim thiab, cov chav kawm, los ntawm ua ntej , nws yog xam raws li default access modifier.
Pom zoo:
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