[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-391109-105":59,"doc-detail-391109-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","java-developer-interview-questions","Java Developer Interview Questions","","A curated set of interview questions for evaluating Java developers across general candidate qualities and role-specific technical knowledge. It outlines what to assess beyond academic performance, including algorithm fundamentals, database understanding, modeling approach, and staying current with technology through books, blogs, social platforms, GitHub activity, and open source involvement or hackathons. It then provides concrete questions on linked lists cycles, ACID databases, Java typing, OOP concepts, polymorphism, encapsulation, parameter passing, abstract classes vs interfaces, factory and Singleton patterns, equality differences, Java EE vs Java SE, checked vs runtime exceptions, concurrency maps, async servlets, lambda expressions, and code-logic/garbage-collection reasoning.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":20,"@type":76,"position":81},"https://docshare.wps.com/document/exam/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/java-developer-interview-questions/391109/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/java-developer-interview-questions/391109.png","ImageObject",300,407,{"name":92,"@type":93},"Margaret","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-09","2026-09-25",true,{"@type":102,"interactionType":103,"userInteractionCount":52},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What non-technical qualities should be assessed for Java developer candidates?","Question",{"text":112,"@type":113},"Focus on willingness to learn, qualified skills, and passion for the job. Also probe how candidates stay up to date via books, blogs, Twitter, GitHub activity, contributions to open source, hackathons, and side projects.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What are some computing science questions included in the profile?",{"text":117,"@type":113},"Examples include detecting whether a linked list has a cycle, and describing characteristics of an ACID database system.",{"name":119,"@type":110,"acceptedAnswer":120},"Which Java role-specific topics are covered by the questions?",{"text":121,"@type":113},"Topics include static vs dynamic typing, polymorphism/inheritance/encapsulation, passing arguments in Java, abstract class vs interface usage, object factory vs Singleton implementation, equality (== vs equals), shallow vs deep comparison, Java EE vs Java SE, and checked vs runtime exceptions.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},391109,1790740754,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":52,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":14,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":24,"preview_page_count":4},137451207643,"https://ap-avatar.wpscdn.com/davatar_3d24733baf745e90a7e4bdd5f77d97b2","Workable is affordable recruiting software. Simple, intuitive and made for teams.  \nJava Developer interview questions  \nThis Java Developer interview profile brings together a snapshot of what to look for in candidates, with a balanced sample of suitable interview questions.  \nIn some respects even the most technical role demands qualities common to strong candidates for all positions: the willingness to learn; qualified skills; passion for the job.  \nEven college performance, while it helps you to assess formal education, doesnʼt give a complete picture. This is not to underplay the importance of a solid background in computer science. Somethings to look for:  \n• Understanding of basic algorithmic concepts  \n• Discuss basic algorithms, how would they find/think/sort  \n• Can they show a wider understanding of databases  \n• Do they have an approach to modelling?  \nDo they stay up to date with the latest developments? If so, how? Probe for their favourite technical books. Who are they following on Twitter, which blogs do they turn to?  \nAre they active on Github? Do they contribute to any open source software projects? Or take part in Hackathons. In short, how strong is their intellectual interest in their chosen field? How is this demonstrated? Ask for side projects (like game development) . Committed, inquisitive candidates will stand out.  \nComputing Science Questions  \n How do you know if a linked list has a cycle in it? As in, one of the nodes in the linked list points to a previous node in the list.  \n Describe the characteristics of an ACID database system.  \nRole Specific Questions  \n Is Java a statically or dynamically typed language?  \n What do you mean by polymorphism, inheritance and encapsulation?  \n Do arguments in Java get passed by reference or by value?  \n What is the difference between an abstract class and an interface and when would you use one over the other?  \n Why use an object Factory and how would you implement the Singleton pattern?  \n What is the difference between “==” and equals(…) method? What is the difference between shallow comparison and deep comparison of objects?  \n How is Java EE related to Java SE?  \n How are Runtime exceptions different from Checked exceptions?  \nTry Workable for free, for [15 days:](15 days: www.workable.com)[ ](15 days: www.workable.com)[www.workable.com](15 days: www.workable.com), no downloads or credit card required  \nWorkable is affordable recruiting software. Simple, intuitive and made for teams.  \n What is the difference between HashMap, ConcurrentHashMap and a Map returned by Collections.synchronizedMap?  \n Servlets 3.0 introduced async support. Describe a use case for it.  \n Why do you think lambda expressions are considered such a big thing in Java 8?  \n Given this code fragment:  \nclass Engine { }  \npublic class App {  \npublic static void main(String[] args) {  \nEngine e = new Engine();  \nEngine e1 = e;  \ne = null;  \n}  \n}  \nWhich statement is true about this code?  \n1. It creates an object and the object is eligible for garbage collection.  \n2. It creates an object and the object is not eligible for garbage collection.  \n3. It creates two objects: e and e1 . The e object is eligible for garbage collection.  \n4. It creates two objects and both the objects are not eligible for garbage collection.  \n Is this possible in Java?  \nA extends B, C  \nTry Workable for free, for [15 days:](15 days: www.workable.com)[ ](15 days: www.workable.com)[www.workable.com](15 days: www.workable.com), no downloads or credit card required","cbCaieJivQknXZ6c","https://ap.wps.com/l/cbCaieJivQknXZ6c","pdf",329326,"English","# Java Developer Interview Questions\n## Candidate evaluation criteria\n## Computing science questions\n## Role specific questions","[{\"question\":\"What non-technical qualities should be assessed for Java developer candidates?\",\"answer\":\"Focus on willingness to learn, qualified skills, and passion for the job. Also probe how candidates stay up to date via books, blogs, Twitter, GitHub activity, contributions to open source, hackathons, and side projects.\"},{\"question\":\"What are some computing science questions included in the profile?\",\"answer\":\"Examples include detecting whether a linked list has a cycle, and describing characteristics of an ACID database system.\"},{\"question\":\"Which Java role-specific topics are covered by the questions?\",\"answer\":\"Topics include static vs dynamic typing, polymorphism/inheritance/encapsulation, passing arguments in Java, abstract class vs interface usage, object factory vs Singleton implementation, equality (== vs equals), shallow vs deep comparison, Java EE vs Java SE, and checked vs runtime exceptions.\"}]","Java Developer Interview Questions | PDF",1790349244]