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Desenvolvedor Java Interview Questions

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Desenvolvedor Java Interview Questions

Prepare-se para responder a perguntas técnicas que testam seu conhecimento básico de Java. Os entrevistadores também podem fazer perguntas abertas para avaliar suas habilidades de codificação e solução de problemas. Prepare-se para perguntas não técnicas relacionadas à sua gestão de tempo, comunicação interpessoal e ética profissional.

Principais perguntas de entrevista para desenvolvedor(a) Java e como respondê-las

Question 1

Pergunta 1: Qual é a diferença entre HashTable e HashMap no Java?

How to answer
Como responder: Os entrevistadores usam perguntas técnicas para avaliar seu treinamento formal e seu conhecimento da linguagem de programação Java. Demonstre suas habilidades de comunicação. Mesmo que você tenha bastante experiência com codificação, revise os conceitos básicos de Java antes da entrevista.
Question 2

Pergunta 2: Crie um programa para determinar se 243 é um número de Armstrong.

How to answer
Como responder: Os entrevistadores usam perguntas abertas para testar suas habilidades de codificação. Essa pergunta avalia sua capacidade de solucionar problemas usando um algoritmo Java. Explique seu raciocínio usando um editor de código ou uma lousa para resolver o problema.
Question 3

Pergunta 3: Como você cria códigos de qualidade quando precisa trabalhar em vários projetos Java ao mesmo tempo?

How to answer
Como responder: Desenvolvedores Java normalmente trabalham em vários projetos ao mesmo tempo. Os entrevistadores usam perguntas como essa para testar suas habilidades organizacionais e de gestão de tempo. Além disso, eles também avaliam seu compromisso com um trabalho de qualidade. Se você tiver experiência na área, inclua exemplos de trabalhos que demonstram alta qualidade e gestão de tempo eficaz.

30,890 desenvolvedor java interview questions shared by candidates

1. OOps concepts with examples. 2. Write a java program to find the first duplicate in an array. 3. Write a java program to print the occurrences of each character. 4. Explain the approach to print middle element in a linked list. 5. Given a string str = "hfjsk6485lop", sort the string and print the characters first and print digits last. 6. Find a missing a element in an array. 7. Collection framework hierarchy. 8. Difference between abstract class and interface. 9. What is association and aggregation . 10. some code snippets to answer. 11. Internal working of a hash map, what is the case if two elements hash code is same. 12. What are the challenges that you faced in your projects how you have handled them. 13. Difference between string, stringBuffer, String builder. 14. Difference between final, finally, finalize. 15. Difference between Exception and Error. 16. Can you throw custom exception with Error Object. 17. Exception handling hierarchy.
avatar

Software Engineer - Java Developer

Interviewed at Siemens

4.1★
Jul 9, 2021

1. OOps concepts with examples. 2. Write a java program to find the first duplicate in an array. 3. Write a java program to print the occurrences of each character. 4. Explain the approach to print middle element in a linked list. 5. Given a string str = "hfjsk6485lop", sort the string and print the characters first and print digits last. 6. Find a missing a element in an array. 7. Collection framework hierarchy. 8. Difference between abstract class and interface. 9. What is association and aggregation . 10. some code snippets to answer. 11. Internal working of a hash map, what is the case if two elements hash code is same. 12. What are the challenges that you faced in your projects how you have handled them. 13. Difference between string, stringBuffer, String builder. 14. Difference between final, finally, finalize. 15. Difference between Exception and Error. 16. Can you throw custom exception with Error Object. 17. Exception handling hierarchy.

Q1) Write simple java code for ,whether given string have character "i" ,using stream API only. Ex: If input is "hello" word, output will be false, as the word doesn't have letter "i". Q2) what is volatile keyword is used for? Q3)explain oops concepts? Q4)why java doesn't support multiple inheritance, what happens if we try to implement? can you explain with some example ? Q5)what is multi threading? Do you know about executor ? Q6)what is REST? Q7)When we are opening a google page, which type of request it is?GET or POST or other requests? Q8)how Requests are mapping with servlets in SPRING MVC? can you explain? Q9)Why spring boot s required,when we have many spring components already?Advanatages of Springboot? Q10)what is Springboot profiling concept? Q11)What are the things you write or configure,in your spring boot application,related to tomcat? Q12)what collections you used in your project?explain How hashmap buckets internally works? Q13)DIfference between HTTP and HTTPS? Q14)What type of errorcodes you get genearlly, when you access a REST webservice using browser? etc
avatar

Java Developer

Interviewed at Synechron

4.1★
Jun 7, 2022

Q1) Write simple java code for ,whether given string have character "i" ,using stream API only. Ex: If input is "hello" word, output will be false, as the word doesn't have letter "i". Q2) what is volatile keyword is used for? Q3)explain oops concepts? Q4)why java doesn't support multiple inheritance, what happens if we try to implement? can you explain with some example ? Q5)what is multi threading? Do you know about executor ? Q6)what is REST? Q7)When we are opening a google page, which type of request it is?GET or POST or other requests? Q8)how Requests are mapping with servlets in SPRING MVC? can you explain? Q9)Why spring boot s required,when we have many spring components already?Advanatages of Springboot? Q10)what is Springboot profiling concept? Q11)What are the things you write or configure,in your spring boot application,related to tomcat? Q12)what collections you used in your project?explain How hashmap buckets internally works? Q13)DIfference between HTTP and HTTPS? Q14)What type of errorcodes you get genearlly, when you access a REST webservice using browser? etc

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