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Desarrollador Java Interview Questions

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Desarrollador Java Interview Questions

En una entrevista para un puesto de desarrollador Java, prepárate para responder preguntas técnicas destinadas a evaluar tus conocimientos básicos de Java. El posible que también te formulen preguntas abiertas para evaluar tus habilidades de programación y de resolución de problemas. Prepárate para afrontar preguntas no técnicas centradas en tus habilidades de comunicación interpersonal, de organización del tiempo y de ética en el trabajo.

Preguntas de entrevista más frecuentes para desarrollador/a Java y cómo responderlas

Question 1

Pregunta n.º 1: ¿Cuál es la diferencia entre HashTable y HashMap en Java?

How to answer
Respuesta recomendada: Los entrevistadores usarán preguntas técnicas para evaluar tu cualificación formal y tus conocimientos del lenguaje de programación Java. Aprovecha tu respuesta para exponer tus habilidades de comunicación. Aunque lleves años programando, quizás te convenga repasar tus nociones básicas de Java antes de la entrevista.
Question 2

Pregunta n.º 2: Escribe un programa para determinar si 243 es un número Armstrong.

How to answer
Respuesta recomendada: Usarán preguntas abiertas para poner a prueba tus habilidades de programación. Esta pregunta permite evaluar tu capacidad para resolver un problema utilizando un algoritmo de Java. Explica tu planteamiento mientras utilizas un editor de código o pizarra.
Question 3

Pregunta n.º 3: ¿Cómo lograrías elaborar código de calidad si tuvieras que simultanear varios proyectos Java?

How to answer
Respuesta recomendada: Los desarrolladores Java a menudo tienen que trabajar en varios proyectos a la vez. Las personas que realizan la entrevista utilizan preguntas como esta para poner a prueba tus habilidades organizativas y de gestión. Las empresas también intentan evaluar tu compromiso de calidad con tu trabajo. Si tienes experiencia como desarrollador, incluye ejemplos de tu experiencia profesional que demuestren tu capacidad para producir trabajo de calidad y para gestionar el tiempo de manera eficiente.

710,207 desarrollador java interview questions shared by candidates

You are given an integer N and an integer M. You are supposed to write a method void findBestCoinsThatMinimizeAverage(int N, int M) that prints the best collection of N coins that minimize the average number of minimum coins needed to generate values from 1 to M. So, if M = 100, and N = 4, then if we use the set {1, 5, 10, 25} to generate each value from 1 to 100, so that for each value the number of coins are minimized, i.e. 1 = 1 (1 coin), 2 = 1 + 1 (2 coins),..., 6 = 1 + 5 (2 coins), ..., 24 = 5 + 5 + 5 + 5 + 1 + 1 + 1 + 1 (8 coins), and we take the average of these coins, we would see that the average comes out to ~5.7. But if we instead use {1, 5, 18, 25}, the average would come out to be 3.7. We are to find that set of N coins, and print them, that produce the minimum average.
avatar

Software Engineer

Interviewed at Meta

3.6★
May 9, 2012

You are given an integer N and an integer M. You are supposed to write a method void findBestCoinsThatMinimizeAverage(int N, int M) that prints the best collection of N coins that minimize the average number of minimum coins needed to generate values from 1 to M. So, if M = 100, and N = 4, then if we use the set {1, 5, 10, 25} to generate each value from 1 to 100, so that for each value the number of coins are minimized, i.e. 1 = 1 (1 coin), 2 = 1 + 1 (2 coins),..., 6 = 1 + 5 (2 coins), ..., 24 = 5 + 5 + 5 + 5 + 1 + 1 + 1 + 1 (8 coins), and we take the average of these coins, we would see that the average comes out to ~5.7. But if we instead use {1, 5, 18, 25}, the average would come out to be 3.7. We are to find that set of N coins, and print them, that produce the minimum average.

I got to the third and final interview stage with the company for which I had to prepare a presentaion talking about myself, how I would fit into the company and what I know about them. Previously I had a successful skype interview and a face to face interview where I impressed and was told to keep doing what i'm doing. So at this final interview stage I had prepared a presentaion about the company and I conducted additional research (as any normal person would), only to be told after a brief chat with an executive before I was supposed to do my presentation, that they wouldn't be taking my application further. Bare in mind this is just before I was supposed to do my presentation that I had prepared and had rehearsed for a considerable amount of time. I'm not angry/annoyed that I didn't get on to the graduate programme, because if i'd have been given the opportunity and they didn't think i'd be suited to it then I would say 'ok fair enough', i'm fuming at the fact that they wouldn't even let me conduct my presentation that they ask all graduates to make as part of the interview process to get onto the LIFT programme. When he was telling me why I hadn't got any further he almost seemed to take pleasure in telling me he'd done the same to over half the other graduates at this stage and didn't allow them to present either. As a whole this tells me the company is completely unprofessional, that their interview process is ridiculously flawed and that the executive who gave me my final interview is a horrible little man who takes pleasure in other people's failure due to his own lack of knowledge around how an interview should work.
avatar

Graduate LIFT Programmer

Interviewed at IESA

2.5★
Dec 13, 2017

I got to the third and final interview stage with the company for which I had to prepare a presentaion talking about myself, how I would fit into the company and what I know about them. Previously I had a successful skype interview and a face to face interview where I impressed and was told to keep doing what i'm doing. So at this final interview stage I had prepared a presentaion about the company and I conducted additional research (as any normal person would), only to be told after a brief chat with an executive before I was supposed to do my presentation, that they wouldn't be taking my application further. Bare in mind this is just before I was supposed to do my presentation that I had prepared and had rehearsed for a considerable amount of time. I'm not angry/annoyed that I didn't get on to the graduate programme, because if i'd have been given the opportunity and they didn't think i'd be suited to it then I would say 'ok fair enough', i'm fuming at the fact that they wouldn't even let me conduct my presentation that they ask all graduates to make as part of the interview process to get onto the LIFT programme. When he was telling me why I hadn't got any further he almost seemed to take pleasure in telling me he'd done the same to over half the other graduates at this stage and didn't allow them to present either. As a whole this tells me the company is completely unprofessional, that their interview process is ridiculously flawed and that the executive who gave me my final interview is a horrible little man who takes pleasure in other people's failure due to his own lack of knowledge around how an interview should work.

1.What is latest version of android and whats the new features for developer 2 .Difference bw paracables and serializable 3. what is build.gradle 4.how to switch bw fragment to activity 5. methods of adapter 6. what is request body parameter in network call 7. how we can do migration in room db
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Android Developer

Interviewed at Hidoc Dr

5★
Oct 14, 2019

1.What is latest version of android and whats the new features for developer 2 .Difference bw paracables and serializable 3. what is build.gradle 4.how to switch bw fragment to activity 5. methods of adapter 6. what is request body parameter in network call 7. how we can do migration in room db

useless questions, not even 1 technical question for a technical role. 1st time in my carrier i have seen an Interview without even 1 technical question shot out & i'm wondering how i got rejected if there is not even one technical discussion happened . It's a time pass show. I hold another offer with another leading aerospace organization before diving in for boeing interview for the same developer position which means the skills sets remains same. Please think 100 times before applying for boeing position. It's a waste of 1 months Plus to know the status of the selection.I feel bad to be part of this Muppets show.
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Java Developer

Interviewed at Boeing

3.7★
May 18, 2016

useless questions, not even 1 technical question for a technical role. 1st time in my carrier i have seen an Interview without even 1 technical question shot out & i'm wondering how i got rejected if there is not even one technical discussion happened . It's a time pass show. I hold another offer with another leading aerospace organization before diving in for boeing interview for the same developer position which means the skills sets remains same. Please think 100 times before applying for boeing position. It's a waste of 1 months Plus to know the status of the selection.I feel bad to be part of this Muppets show.

Basically the interview questions were data structure. The first one was just a simple data structure question, but the second one was mathematical question. I hadn't expected that kind of questions would be asked, so I got really confused. The questions was to prove that Y is a multiple of six, where there are consecutive three numbers X, Y, Z and X and Z are a prime number. I was totally stuck at the point and couldn't make it.
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Software Engineer

Interviewed at IXL Learning

3.3★
Jan 23, 2013

Basically the interview questions were data structure. The first one was just a simple data structure question, but the second one was mathematical question. I hadn't expected that kind of questions would be asked, so I got really confused. The questions was to prove that Y is a multiple of six, where there are consecutive three numbers X, Y, Z and X and Z are a prime number. I was totally stuck at the point and couldn't make it.

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