{"id":38473,"date":"2022-11-15T05:00:00","date_gmt":"2022-11-15T04:00:00","guid":{"rendered":"https:\/\/www.mzone.cz\/?p=38473"},"modified":"2022-11-14T20:17:32","modified_gmt":"2022-11-14T19:17:32","slug":"datovy-inzenyr-nejcastejsi-otazky-pri-pohovoru","status":"publish","type":"post","link":"https:\/\/www.mzone.cz\/en\/datovy-inzenyr-nejcastejsi-otazky-pri-pohovoru\/","title":{"rendered":"Co by m\u011bl zn\u00e1t za\u010d\u00ednaj\u00edc\u00ed datov\u00fd in\u017een\u00fdr: Nej\u010dast\u011bj\u0161\u00ed ot\u00e1zky p\u0159i pohovoru"},"content":{"rendered":"<p><strong>Profese datov\u00e9ho in\u017een\u00fdra je ve sv\u011bt\u011b IT st\u00e1le b\u011b\u017en\u011bj\u0161\u00ed a p\u0159itahuje st\u00e1le v\u00edce lid\u00ed. Dmytro Fedyukov z Parimatch Tech rad\u00ed za\u010d\u00ednaj\u00edc\u00edm datov\u00fdm in\u017een\u00fdr\u016fm, jak se p\u0159ipravit na pohovor, \u010demu firmy v\u011bnuj\u00ed pozornost b\u011bhem pohovoru, a pro\u010d jsou v t\u00e9to f\u00e1zi d\u016fle\u017eit\u011bj\u0161\u00ed m\u011bkk\u00e9 dovednosti ne\u017e ty odborn\u00e9.<\/strong><\/p><br>\n\n\n\n<p>Nejprve je t\u0159eba, aby zam\u011bstnavatel zjistil n\u011bkolik informac\u00ed t\u00fdkaj\u00edc\u00edch se kandid\u00e1t\u016f.&nbsp;<\/p><br>\n\n\n\n<h2 class=\"wp-block-heading\">1. Motivace kandid\u00e1ta<\/h2>\n\n\n\n<p>Juniorsk\u00e1 pozice je o u\u010den\u00ed. T\u00fdm, kter\u00fd p\u0159ijme za\u010d\u00ednaj\u00edc\u00edho specialistu, o\u010dek\u00e1v\u00e1, \u017ee bude d\u011blat pokroky. V souladu s t\u00edm by ti, kte\u0159\u00ed jsou p\u0159ipraveni se u\u010dit, m\u011bli m\u00edt ji\u017e spln\u011bn\u00e9 ur\u010dit\u00e9 kroky.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Pokud osoba absolvovala ur\u010dit\u00e9 kurzy, m\u00e1 titul nebo jej pr\u00e1v\u011b z\u00edsk\u00e1v\u00e1, je to dobr\u00e9 znamen\u00ed. Pokud uchaze\u010d nem\u00e1 absolutn\u011b nic, o \u010dem by se dalo mluvit, nebo naopak absolvuje des\u00edtky kurz\u016f najednou, je to \u0161patn\u00e9 znamen\u00ed.<\/p>\n<\/blockquote>\n\n\n\n<p>Proto\u017ee v prvn\u00edm p\u0159\u00edpad\u011b \u010dlov\u011bk pravd\u011bpodobn\u011b nechce skute\u010dn\u011b pokro\u010dit a v druh\u00e9m p\u0159\u00edpad\u011b zcela nerozum\u00ed tomu, co d\u011bl\u00e1 a kam sm\u011b\u0159uje.<\/p><br>\n\n\n\n<h2 class=\"wp-block-heading\">2. M\u011bkk\u00e9 dovednosti a jejich \u00farove\u0148<\/h2>\n\n\n\n<p>N\u011bkdy je pro \u010dlena t\u00fdmu d\u016fle\u017eit\u011bj\u0161\u00ed m\u00edt lep\u0161\u00ed m\u011bkk\u00e9 dovednosti ne\u017e \u201etvrd\u00e9\u201c technick\u00e9 dovednosti. Junior\u0161t\u00ed specialist\u00e9 jsou pr\u00e1v\u011b takov\u00fdm p\u0159\u00edpadem. Za\u010d\u00e1tek kari\u00e9ry je obdob\u00edm, kdy vyu\u017e\u00edv\u00e1te jednu \u010d\u00e1st sv\u00fdch dovednost\u00ed ke zvl\u00e1dnut\u00ed jin\u00e9. V souladu s t\u00edm mus\u00ed za\u010d\u00ednaj\u00edc\u00ed datov\u00fd in\u017een\u00fdr vyu\u017e\u00edvat v\u0161echny siln\u00e9 str\u00e1nky sv\u00e9 povahy, aby dos\u00e1hl pokroku. Je t\u0159eba um\u011bt kompetentn\u011b komunikovat s lidmi, kte\u0159\u00ed juniorn\u00edho specialistu u\u010d\u00ed, efektivn\u011b vst\u0159eb\u00e1vat nov\u00e9 informace a zp\u011btnou vazbu od koleg\u016f, um\u011bt zd\u016fvodnit vlastn\u00ed rozhodnut\u00ed a do jist\u00e9 m\u00edry i improvizovat. Pr\u00e1v\u011b na to \u010dasto dbaj\u00ed personalist\u00e9 p\u0159i pohovorech.<\/p><br>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.mzone.cz\/wp-content\/uploads\/2022\/11\/pexels-developer.jpg\" alt=\"Program\u00e1tor\" class=\"wp-image-38478\" width=\"829\" height=\"549\" srcset=\"https:\/\/www.mzone.cz\/wp-content\/uploads\/2022\/11\/pexels-developer.jpg 646w, https:\/\/www.mzone.cz\/wp-content\/uploads\/2022\/11\/pexels-developer-300x199.jpg 300w, https:\/\/www.mzone.cz\/wp-content\/uploads\/2022\/11\/pexels-developer-18x12.jpg 18w, https:\/\/www.mzone.cz\/wp-content\/uploads\/2022\/11\/pexels-developer-590x391.jpg 590w\" sizes=\"auto, (max-width: 829px) 100vw, 829px\" \/><\/figure><br>\n\n\n\n<h2 class=\"wp-block-heading\">3. Typ my\u0161len\u00ed<\/h2>\n\n\n\n<p>V profesi datov\u00e9ho in\u017een\u00fdra je nejd\u016fle\u017eit\u011bj\u0161\u00ed pr\u00e1v\u011b in\u017een\u00fdrsk\u00e1 \u010d\u00e1st. In\u017een\u00fd\u0159i jsou typem lid\u00ed, kte\u0159\u00ed nach\u00e1zej\u00ed \u0159e\u0161en\u00ed jak\u00e9hokoli typu probl\u00e9mu bez ohledu na to, zda m\u00e1 zku\u0161enost s ur\u010dit\u00fdm \u201astackem\u2018 nebo technologi\u00ed. Datov\u00fd in\u017een\u00fdr mus\u00ed b\u00fdt \u010dasto v\u0161estrann\u00fd: n\u011bkde napsat k\u00f3d v Pythonu, n\u011bkde v Bashi, p\u0159e\u010d\u00edst k\u00f3d v Jav\u011b atd.<\/p><br>\n\n\n\n<h2 class=\"wp-block-heading\">A nyn\u00ed k odborn\u00fdm ot\u00e1zk\u00e1m\u2026<\/h2>\n\n\n\n<p>Datov\u00fd in\u017een\u00fdr junior by m\u011bl v\u011bd\u011bt nebo alespo\u0148 um\u011bt mluvit o:<\/p><br>\n\n\n\n<h3 class=\"wp-block-heading\">git&nbsp;<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>git clone\u00a0<\/li>\n\n\n\n<li>git config\u00a0<\/li>\n\n\n\n<li>git pull\u00a0<\/li>\n\n\n\n<li>git push\u00a0<\/li>\n\n\n\n<li>git merge\u00a0<\/li>\n\n\n\n<li>git add\u00a0<\/li>\n\n\n\n<li>git branch -D\u00a0<\/li>\n\n\n\n<li>git checkout -b atd.\u00a0<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Python<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Virtu\u00e1ln\u00ed prost\u0159ed\u00ed\u00a0<\/li>\n\n\n\n<li>Pyenv\u00a0<\/li>\n\n\n\n<li>Poetry\u00a0<\/li>\n\n\n\n<li>Pip\u00a0<\/li>\n\n\n\n<li>Datov\u00e9 struktury\u00a0<\/li>\n\n\n\n<li>Roz\u0161i\u0159ov\u00e1n\u00ed\u00a0<\/li>\n\n\n\n<li>Dekor\u00e1tory\u00a0<\/li>\n\n\n\n<li>Moduly\u00a0<\/li>\n\n\n\n<li>Cykly\u00a0<\/li>\n\n\n\n<li>T\u0159\u00eddy\u00a0<\/li>\n\n\n\n<li>Asynchronn\u00ed programov\u00e1n\u00ed\u00a0<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Docker &amp; Kubernetes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sestaven\u00ed dockeru\u00a0<\/li>\n\n\n\n<li>Spu\u0161t\u011bn\u00ed dockeru\u00a0<\/li>\n\n\n\n<li>Docker cp\u00a0<\/li>\n\n\n\n<li>Co je to container?\u00a0<\/li>\n\n\n\n<li>Co je to pod a jak se li\u0161\u00ed od containeru?\u00a0<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Terraform<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Terraform init\u00a0<\/li>\n\n\n\n<li>Terraform plan\u00a0<\/li>\n\n\n\n<li>Terraform apply\u00a0<\/li>\n\n\n\n<li>Struktura soubor\u016f projektu terraform\u00a0<\/li>\n\n\n\n<li>loops\u00a0<\/li>\n\n\n\n<li>Templatefile\u00a0<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Datov\u00e9 in\u017een\u00fdrstv\u00ed<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Co je MapReduce?\u00a0<\/li>\n\n\n\n<li>Co je HDFS?\u00a0<\/li>\n\n\n\n<li>Co je to partitioning?\u00a0<\/li>\n\n\n\n<li>Jak je Hadoop uspo\u0159\u00e1d\u00e1n?\u00a0<\/li>\n\n\n\n<li>Co je lambda architecture?\u00a0<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Datov\u00e9 typy a datab\u00e1ze&nbsp;<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Co je to datab\u00e1ze?\u00a0<\/li>\n\n\n\n<li>Co jsou prim\u00e1rn\u00ed a sekund\u00e1rn\u00ed kl\u00ed\u010de?\u00a0<\/li>\n\n\n\n<li>Co jsou to indexy?\u00a0<\/li>\n\n\n\n<li>Co je normalizace a denormalizace?\u00a0<\/li>\n\n\n\n<li>Jak\u00fd je rozd\u00edl mezi rela\u010dn\u00edm a nerela\u010dn\u00edm modelem?\u00a0<\/li>\n\n\n\n<li>Co jsou to form\u00e1ty velk\u00fdch dat?\u00a0<\/li>\n\n\n\n<li>K \u010demu slou\u017e\u00ed datab\u00e1ze NoSQL?\u00a0<\/li>\n\n\n\n<li>Co je to operace CRUD?\u00a0<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Linux<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Editory: nano, micro, sublime, vi\u00a0<\/li>\n\n\n\n<li>Spr\u00e1vci bal\u00ed\u010dk\u016f: apt-get, apk, brew\u00a0<\/li>\n\n\n\n<li>Prom\u011bnn\u00e9 prost\u0159ed\u00ed\u00a0<\/li>\n\n\n\n<li>cd ls -a | -lah\u00a0<\/li>\n\n\n\n<li>chmod\u00a0<\/li>\n\n\n\n<li>cat\u00a0<\/li>\n\n\n\n<li>sed\u00a0<\/li>\n\n\n\n<li>grep\u00a0<\/li>\n\n\n\n<li>| (pipe)\u00a0<\/li>\n\n\n\n<li>&amp;&amp; atd.\u00a0<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">S\u00ed\u0165: HTTP\/HTTPS, TCP\/IP<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">SQL&nbsp;<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Co znamen\u00e1 SQL? Rozlu\u0161t\u011bte zkratku a popi\u0161te jej\u00ed \u00fa\u010del.\u00a0<\/li>\n\n\n\n<li>Jak\u00fd p\u0159\u00edkaz SQL se pou\u017e\u00edv\u00e1 k vlo\u017een\u00ed dat do tabulky?\u00a0<\/li>\n\n\n\n<li>Jak byste pomoc\u00ed jazyka SQL vybrali z tabulky 01\/27\/2021 (n\u00e1zev sloupce registrace datum) u\u017eivatele (sloupec p\u0159\u00edjmen\u00ed jm\u00e9no), jejich\u017e jm\u00e9no za\u010d\u00edn\u00e1 latinsk\u00fdm p\u00edsmenem &#8220;T&#8221; (nerozli\u0161uje se velikost p\u00edsmen)?\u00a0<\/li>\n\n\n\n<li>Zobraz\u00ed oper\u00e1tor OR v\u0161echny z\u00e1znamy, kter\u00e9 odpov\u00eddaj\u00ed alespo\u0148 jedn\u00e9 z podm\u00ednek? Vr\u00e1t\u00ed p\u0159\u00edkaz AND v\u0161echny z\u00e1znamy, pokud jsou v\u0161echny podm\u00ednky pravdiv\u00e9? (odpov\u011b\u010f by m\u011bla b\u00fdt nepravdiv\u00e1\\pravdiv\u00e1).\u00a0<\/li>\n\n\n\n<li>Jak\u00fd v\u00fdraz SQL je pou\u017eit k se\u0159azen\u00ed v\u00fdsledk\u016f?\u00a0<\/li>\n\n\n\n<li>Co jsou to agrega\u010dn\u00ed funkce SQL? Uve\u010fte p\u0159\u00edklad. A p\u0159\u00edklad po\u017eadavku na jednu agrega\u010dn\u00ed funkci podle va\u0161eho n\u00e1zoru.\u00a0<\/li>\n\n\n\n<li>Jak pomoc\u00ed jazyka SQL vypo\u010d\u00edtat medi\u00e1n a sm\u011brodatnou odchylku hodnoty Uve\u010fte p\u0159\u00edklady po\u017eadavku.\u00a0<\/li>\n\n\n\n<li>Jak\u00fd je rozd\u00edl mezi COUNT (DISTINCT (player_id)) a APPROXIMATE COUNT DISTINCT (player_id)? Kter\u00fd v\u00fdraz pracuje rychleji ve velk\u00fdch souborech dat? Bude zpracov\u00e1n\u00ed dat stejn\u00e9?\u00a0<\/li>\n\n\n\n<li>K \u010demu slou\u017e\u00ed funkce RANDOM() v jazyce SQL? Jak\u00e9 typy \u00faloh lze pou\u017e\u00edt?\u00a0<\/li>\n\n\n\n<li>Co jsou to okenn\u00ed funkce? K \u010demu se pou\u017e\u00edvaj\u00ed? Schopnost uv\u00e9st p\u0159\u00edklady okenn\u00edch funkc\u00ed.\u00a0<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">K\u00f3dov\u00e1n\u00ed v re\u00e1ln\u00e9m \u010dase<\/h2>\n\n\n\n<p>\u017div\u00e9 k\u00f3dov\u00e1n\u00ed b\u011bhem pohovoru s datov\u00fdm in\u017een\u00fdrem nen\u00ed zdaleka povinnou f\u00e1z\u00ed. Pou\u017e\u00edv\u00e1 se ve v\u011bt\u0161in\u011b p\u0159\u00edpad\u016f, kdy \u00farove\u0148 kandid\u00e1ta nebyla b\u011bhem rozhovoru pln\u011b pochopena. \u00dakol \u017eiv\u00e9ho k\u00f3dov\u00e1n\u00ed je pochopit, zda kandid\u00e1t rozum\u00ed tomu co d\u011bl\u00e1 a pro\u010d; zda rozum\u00ed z\u00e1kladn\u00edm v\u011bcem, jako jsou oper\u00e1tory, cykly, porovn\u00e1v\u00e1n\u00ed vzor\u016f atd. Pro za\u010d\u00e1te\u010dn\u00edky proto existuje jedin\u00e1 rada \u2013 sna\u017ete se proniknout do podstaty toho, co se u\u010d\u00edte. Ne podle knihy, ale tak, jak tomu rozum\u00edte. D\u011blejte chyby, opravujte je a u\u010dte se d\u00e1l.<\/p><br>\n\n\n\n<div class=\"wp-block-media-text alignwide is-stacked-on-mobile is-vertically-aligned-top\" style=\"grid-template-columns:29% auto\"><figure class=\"wp-block-media-text__media\"><a href=\"https:\/\/www.mzone.cz\/sql-vs-python-ktery-programovaci-jazyk-je-lepsi-umet-v-zacatcich-it-kariery\/\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.mzone.cz\/wp-content\/uploads\/2021\/11\/Programovaci-jazyk-SQL-1024x683.jpg\" alt=\"Programovac\u00ed jazyk SQL\" class=\"wp-image-34051 size-full\" srcset=\"https:\/\/www.mzone.cz\/wp-content\/uploads\/2021\/11\/Programovaci-jazyk-SQL-1024x683.jpg 1024w, https:\/\/www.mzone.cz\/wp-content\/uploads\/2021\/11\/Programovaci-jazyk-SQL-300x200.jpg 300w, https:\/\/www.mzone.cz\/wp-content\/uploads\/2021\/11\/Programovaci-jazyk-SQL-768x512.jpg 768w, https:\/\/www.mzone.cz\/wp-content\/uploads\/2021\/11\/Programovaci-jazyk-SQL-1536x1024.jpg 1536w, https:\/\/www.mzone.cz\/wp-content\/uploads\/2021\/11\/Programovaci-jazyk-SQL-2048x1365.jpg 2048w, https:\/\/www.mzone.cz\/wp-content\/uploads\/2021\/11\/Programovaci-jazyk-SQL-18x12.jpg 18w, https:\/\/www.mzone.cz\/wp-content\/uploads\/2021\/11\/Programovaci-jazyk-SQL-800x533.jpg 800w, https:\/\/www.mzone.cz\/wp-content\/uploads\/2021\/11\/Programovaci-jazyk-SQL-400x267.jpg 400w, https:\/\/www.mzone.cz\/wp-content\/uploads\/2021\/11\/Programovaci-jazyk-SQL-500x333.jpg 500w, https:\/\/www.mzone.cz\/wp-content\/uploads\/2021\/11\/Programovaci-jazyk-SQL-1170x780.jpg 1170w, https:\/\/www.mzone.cz\/wp-content\/uploads\/2021\/11\/Programovaci-jazyk-SQL-590x393.jpg 590w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure><div class=\"wp-block-media-text__content\">\n<h4><a href=\"https:\/\/www.mzone.cz\/sql-vs-python-ktery-programovaci-jazyk-je-lepsi-umet-v-zacatcich-it-kariery\/\">SQL vs. Python: Kter\u00fd programovac\u00ed jazyk je lep\u0161\u00ed um\u011bt v za\u010d\u00e1tc\u00edch IT kari\u00e9ry?<\/a><\/h4><br>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Profese datov\u00e9ho in\u017een\u00fdra je ve sv\u011bt\u011b IT st\u00e1le b\u011b\u017en\u011bj\u0161\u00ed a p\u0159itahuje st\u00e1le v\u00edce lid\u00ed. Dmytro Fedyukov z Parimatch Tech rad\u00ed za\u010d\u00ednaj\u00edc\u00edm datov\u00fdm in\u017een\u00fdr\u016fm, jak se p\u0159ipravit na pohovor, \u010demu firmy v\u011bnuj\u00ed pozornost b\u011bhem pohovoru, a pro\u010d jsou v t\u00e9to f\u00e1zi d\u016fle\u017eit\u011bj\u0161\u00ed m\u011bkk\u00e9 dovednosti ne\u017e ty odborn\u00e9. Nejprve je t\u0159eba, aby zam\u011bstnavatel zjistil n\u011bkolik informac\u00ed t\u00fdkaj\u00edc\u00edch [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":34002,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"kk_blocks_editor_width":"","_kiokenblocks_attr":"","_kiokenblocks_dimensions":"","footnotes":""},"categories":[65],"tags":[5632,2117,5638,800,5177,4478,5637,4476,5188,141,482,5187,434,19,5635,5633,5634,2025,5636],"class_list":["post-38473","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technika","tag-datovy-inzenyr","tag-it","tag-linux","tag-pocitace","tag-pohovor","tag-programator","tag-programovaci-jazyk","tag-programovani","tag-python","tag-rady","tag-rady-a-tipy","tag-sql","tag-technika","tag-technologie","tag-vedomosti","tag-vyvojar","tag-zacatecnik","tag-zacatky","tag-znalosti"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Co by m\u011bl zn\u00e1t za\u010d\u00ednaj\u00edc\u00ed datov\u00fd in\u017een\u00fdr: Nej\u010dast\u011bj\u0161\u00ed ot\u00e1zky p\u0159i pohovoru - Mzone<\/title>\n<meta name=\"description\" content=\"Profese datov\u00e9ho in\u017een\u00fdra je ve sv\u011bt\u011b IT st\u00e1le b\u011b\u017en\u011bj\u0161\u00ed a p\u0159itahuje st\u00e1le v\u00edce lid\u00ed. 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