Coding Interview Prep: DSA/SQL

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Iqukethe izikhangisoUkuthenga ngaphakathi nohlelo

Mayelana nalolu hlelo lokusebenza

Ukulungiselela ingxoxo yokubhala amakhodi yemibuzo ephakamayo: izakhiwo zedatha nama-algorithms, imibuzo yengxoxo ye-SQL kanye nohlelo lokuncintisana, ngamathrekhi amathathu anezifundo ezimfushane ezingama-90 nezifundo ezingama-360. Funda iphethini, uphendule umbuzo ongemuva kwayo, bese ubhala ikhambi ku-Python bese ulisebenzisa.

Ingxoxo yokubhala amakhodi akuyona ukuhlolwa kwenkumbulo. Umxoxi ufuna ukuzwa ukuthi kungani impendulo eyodwa esebenzayo idlula enye. Uhlelo lokusebenza luqala ngalokho kanye: umbuzo owodwa wangempela, i-Two Sum, kanye nezixazululo ezimbili ezifanele ezisebenza eceleni kwezinombolo ezifanayo ezingama-64, lapho konke ukuqhathanisa kubalwa esikrinini sakho. Impendulo efanayo, umsebenzi omningi kakhulu. Leso sikhala yilokho okushiwo yi-O enkulu kanye nobunzima besikhathi.

IZINGOMA EZINTATHU, IZIFUNDO EZINGU-90
• Izakhiwo Zedatha Nama-Algorithm: ubunzima, ama-array kanye nezikhombisi ezimbili, izintambo, ukuhlunga, usesho lwe-binary, uhlu oluxhunyiwe, ama-stack kanye nemigqa, amamephu e-hash, ukuphindaphinda, izihlahla, ama-heaps, amagrafu ane-BFS kanye ne-DFS, ukulandelela emuva, ama-algorithms ahahayo, uhlelo oluguquguqukayo, izindlela ezimfushane, ukuzama, ukuthola i-union, ukuphathwa kwe-bit kanye nezisekelo zokuklama uhlelo
• I-SQL yezingxoxo: SELECT kanye ne-WHERE gotchas, imibuzo ephezulu-N, GROUP BY kanye ne-HAVING, zonke izinhlobo ze-JOIN, NULL handling, ama-subqueries kanye nama-CTE, imisebenzi yewindi (ROW_NUMBER, RANK, LAG, LEAD), izikhala kanye neziqhingi, ukuhlaziywa kweqembu kanye ne-funnel, EXPLAIN kanye ne-indexing, ukuthengiselana, ukwakheka kweschema
• Uhlelo Lokuncintisana: abahluleli kanye nezinqumo eziku-inthanethi, ukufaka okusheshayo kanye nokukhipha, izilinganiso "zizodlula", izibalo ze-prefix, usesho oluphelele, ithiyori yenombolo kanye ne-combinatorics, i-DP ethuthukisiwe, i-Dijkstra, i-Fenwick kanye nezihlahla ze-segment, ama-algorithms ezintambo kanye nethiyori yomdlalo

Inkambo yokuqala yazo zonke Ithrekhi imahhala: Imibuzo Yengxoxo Ye-SQL Fundamentals, i-Python Warm-Up ye-DSA, kanye ne-Wamukelekile e-Arena.

IZINKINGA EZINGU-60 ZOKUKHODA OZIXAZULULAYO ​​KU-PYTHON
• Umhleli wekhodi owakhelwe ngaphakathi: bhala ikhambi lakho, ulisebenzise bese ulihlola
• Izinselelo ezingama-20 ezilula, ezingama-20 eziphakathi nezingama-20 zokubhala ikhodi eqinile, kusukela ku-Two Sum, Valathesi Evumelekile kanye Nokusesha Okubili kuya ku-Merge Intervals, Ukushintsha Kwemali, Ukubamba Amanzi Emvula, Hlela Ibanga kanye Nokuphuka Kwamagama
• Kuqoqwe ngephethini: ama-array kanye ne-hashing, izintambo, izikhombisi ezimbili, ifasitela elishelelayo, i-matrix, uhlelo oluguquguqukayo, ukuhaha kanye nokubuyela emuva

AMAPHROJEKTHI AMAPHETHENI AYI-20 AQONDISWAYO
• Yakha iphethini eyodwa isinyathelo ngesinyathelo: izikhombisi ezimbili, amamephu e-hash, ifasitela elishelelayo, usesho lwe-binary, i-stack, i-BFS kugridi, i-DFS yesihlahla, i-heap top-k, izikhawu, ukuzama, izibalo ze-prefix, ama-algorithms egrafu nokuningi
• Kuzo zonke izinyathelo ukhetha ibhulokhi yekhodi efanele bese ubona ukuthi kungani isebenza

ZIQHEKEZELE PHAKATHI KWEMISEBENZI
• Imibuzo nezimpendulo ezingama-50 zengxoxo njengamakhadi okufiphaza: cabanga kuqala, bese wembula impendulo
• Imibuzo engama-50 yemibuzo kanye nezikhathi zokubuyekeza ukuguqula "Ngikufundile" kube "Ngiyakukhumbula"
• Ishidi lokukhohlisa elinokufakwa okungu-67 ezakhiweni zedatha, ama-algorithms kanye ne-SQL
• Gcina imibuzo, gcina amanothi kunoma yisiphi isifundo, futhi wakhe imigqa kanye ne-XP
• Umeluleki we-AI ochaza umqondo ngolimi olulula uma wenqaba ukuchofoza

NGUBANI
• Abafundi abalungiselela umsebenzi wokuqala wokufunda noma indima yeziqu
• Abathuthukisi balungiselela inhlolokhono yobuchwepheshe
• Abahlaziyi bedatha kanye nonjiniyela abalindele imibuzo ye-SQL ku-loop yokuqasha
• Noma ubani ofuna ukufunda ama-algorithms kahle, hhayi nje ukukhumbula izimpendulo

Izifundo zimfushane ngokwanele ukuhamba. Uhlelo lokusebenza lutholakala ngezilimi ezingu-22.

MAHHALA NOKUHLE
Mahhala: inkambo yokuqala yethrekhi ngayinye, izinkinga ezimbili zokubhala ikhodi, iphrojekthi eyodwa eqondiswayo, amakhadi emibuzo, imibuzo, ishidi lokukhohlisa kanye nemibuzo emithathu yomeluleki we-AI ngosuku.

I-Pro ivula zonke izifundo ezingu-90, zonke izinkinga zokubhala ikhodi ezingu-60, zonke iphrojekthi ezingu-20 eziqondiswayo, izitifiketi zezifundo kanye nezimpendulo zomeluleki we-AI ezingenamkhawulo. Okubhaliselwe kuvuselelwa ngokuzenzakalelayo futhi kungakhanselwa nganoma yisiphi isikhathi ku-Google Play.

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