Wane matakin Java wannan gwajin ke aunawa?

Ya haɗa daga matakin mafari zuwa na gwanaye a zama ɗaya. Tambayoyin farko sun shafi abubuwan da kowane mai amfani da Java ke fuskanta — == da .equals, Integer autoboxing, da overflow. Tambayoyin baya sun shiga cikin warware matsalar overload, generics da collections, exceptions, concurrency da Stream laziness. Makin da kuka samu zai sanya ku a ɗaya daga cikin matakai huɗu, kuma sunayen matakan an zaɓe su ne da gangan daga waɗanda ake amfani da su a tallace-tallacen ayyuka.

Shin ina buƙatar sanin wani nau'in Java na musamman?

A'a. Kowace tambaya an rubuta ta ne dangane da ainihin yadda harshen ke aiki wanda bai canza ba a cikin nau'ikan Java na zamani — ainihin abu, tsarin collections, tsarin exception da kuma ainihin abubuwan concurrency. Babu wani abu a nan da ya dogara da wani API na wani nau'in Java na musamman.

Shin wannan daidai yake da tantancewar Java da masu ɗaukar ma'aikata ke yi?

Yana ɗaukar irin tunanin karantawa-da-hasashe wanda yawancin tantancewar masu ɗaukar ma'aikata ke farawa da shi, a cikin irin wannan tsarin gajerun rubutu, wanda shine dalilin da ya sa yake aiki a matsayin shiri. Ba kwafin wani takamaiman gwajin mai ɗaukar ma'aikata bane, kuma samun maki mai kyau a nan ba takardar shaida bace. Abin da yake gaya muku shine wanne daga cikin fannoni huɗu za ku iya rasa maki, wanda shine abu mai amfani da za ku sani kafin tattaunawar fasaha.

Yaya tsawon lokacin da ake ɗauka?

Kimanin mintuna tara. Babu mai ƙidayar lokaci a kan kowace tambaya — gwajin yana auna ko kun san abin da lambar rubutun take yi, ba saurin da za ku iya danna maɓalli ba. Kuna iya yin tunani game da tambaya har tsawon lokacin da kuke so.

Dole ne in yi rajista?

A'a. Kuna iya yin gwajin kuma ku ga makin ku da rarrabuwar fannoni ba tare da asusu ba. Ƙirƙirar asusu yana da amfani ne kawai idan kuna son a adana sakamakon don ku iya kwatanta shi da wani gwaji na gaba.

Zan ga waɗanne tambayoyi na yi kuskure?

Za ku sami maki ga kowane ɗayan fannoni huɗu, don haka za ku iya ganin inda asarar ta fi yawa, tare da shawarwarin da aka yi niyya ga matakin da kuka sauka. Gwajin ba ya buga takardar amsa ga kowace tambaya, saboda tambayoyin suna juyawa kuma buga amsoshi zai sa makin ya zama maras amfani ga duk wanda ke amfani da shi don shiri.

Zan iya amfani da wannan don tantance 'yan takara?

Karantar lambar da ba a saba gani ba daidai abu ne da za a iya karewa don tantance kowane aiki da ya shafi Java, kuma wannan gwaji ne na gaskiya-ko-karya maimakon auna halaye, don haka ba ya ɗauke da matsalolin adalci da gwaje-gwajen nau'in halaye ke da shi. Idan kuna son aika shi ga masu nema kuma ku tattara sakamako a wuri ɗaya, wannan yana gudana ne ta ɓangaren ɗaukar ma'aikata na JobCannon maimakon ta wannan shafin.

Gwada Ƙwarewar Java ɗinku

Gwada Java ɗinku a fannin ainihin tsarin rubutu da nau'uka, hanyoyi/overloading/scope, collections/generics/control flow, da exceptions/concurrency/idioms. Tambayoyi 30 na karanta lamba, maki nan take ta fanni, kyauta ba tare da rajista ba.

tambayoyi 30mintuna 9

Yi wannan gwajin

Muhimman abubuwa

Menene Gwajin Java?

Wannan gwajin Java ne na yanayi: gajerun gutsuttsuran lamba 30, kowanne yana biye da tambaya game da abin da ainihin ke faruwa idan an gudanar da shi. Kwatanta String da == wanda a hankali yake duba wuraren ajiya maimakon abun ciki. Ma'ajiyar autoboxing na Integer wanda ke sa == ya yi aiki a ƙasa da 128 kuma ya kasa aiki a sama da shi. Wani toshe na finally wanda ke soke darajar dawowa ba tare da kowa ya lura ba. Kuna zaɓar amsar da ta dace da abin da lambar ainihin take bugawa ko yi, ba abin da yake kama da ya kamata ya faru ba.

Karanta ƙari

Tambayoyi 30 sun shafi fannoni huɗu — ainihin tsarin rubutu da nau'uka, hanyoyi/overloading/scope, collections/generics/control flow, da exceptions/concurrency/idioms. Waɗannan fannoni huɗu sune wuraren da karanta lamba da gudanar da lamba ke bambanta a hankali, kuma inda sanarwar aiki na “Ƙwararren Java” yawanci ke nufin wani abu na musamman da zarar kun shiga hira. Kuna samun maki a kowane fanni, don haka rauni ya bayyana a matsayin rauni maimakon a matsayin ƙaramin jimlar maki.

Yana ɗaukar kimanin mintuna tara, babu rajista, kuma babu lambar da za a rubuta ko a haɗa — kowace tambaya karantawa ce da hasashe, kamar yadda babban injiniya ke duba buƙatar ja. Sanin tsarin rubutu da sanin abin da wani takamaiman gutsure ke yi a lokacin gudanarwa ƙwarewa ce daban-daban, kuma wannan yana auna na biyun.

Abin da za ku samu