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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.

711,130 desarrollador java interview questions shared by candidates

A rustic village contains one million married couples and no children. Each couple has exactly one child per year. Each couple wants a girl, but also wants to minimize the number of children they have, so they will continue to have children until they have their first girl. Assume that children are equally likely to be born male or female. Let p(t) be the percentage of children that are female at the end of year t. What is p(t)? "Can't tell" is a potential answer if you don't have sufficient information.
avatar

Senior Java Developer

Interviewed at Acuitus

4.4★
Apr 6, 2010

A rustic village contains one million married couples and no children. Each couple has exactly one child per year. Each couple wants a girl, but also wants to minimize the number of children they have, so they will continue to have children until they have their first girl. Assume that children are equally likely to be born male or female. Let p(t) be the percentage of children that are female at the end of year t. What is p(t)? "Can't tell" is a potential answer if you don't have sufficient information.

-given a binary tree, and a number in each node. Select the nodes that will maximize the overall sum such that if a node is selected its parent and children cannot be selected. Return the sum of the selected nodes. - The buildings in a a city can be represented in 2D by linear array. Given an array that represents the heights of the buildings such that the value in a specific index in the array indicates the height of the building at that location in the city. How much rain will gather in the city if it rains?
avatar

Software Engineer

Interviewed at Altera

3.4★
May 6, 2015

-given a binary tree, and a number in each node. Select the nodes that will maximize the overall sum such that if a node is selected its parent and children cannot be selected. Return the sum of the selected nodes. - The buildings in a a city can be represented in 2D by linear array. Given an array that represents the heights of the buildings such that the value in a specific index in the array indicates the height of the building at that location in the city. How much rain will gather in the city if it rains?

This wasn't incredibly difficult, but one guy asked me to design Facebook (at a high level) and another asked me to design Twitter. I thought these were really cool questions because they tested overall design smarts instead of obscure algorithmic stuff.
avatar

Software Engineer

Interviewed at Zocdoc

3.6★
Nov 16, 2014

This wasn't incredibly difficult, but one guy asked me to design Facebook (at a high level) and another asked me to design Twitter. I thought these were really cool questions because they tested overall design smarts instead of obscure algorithmic stuff.

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