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Programador Sql Interview Questions

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Programador Sql Interview Questions

SQL son las siglas de Structured Query Language (lenguaje de consulta estructurado) y un programador SQL es la persona encargada de crear bases de datos SQL y las aplicaciones que funcionan con ellas. Por lo general, utilizan tablas de diseño y recursos de almacenamiento para mayor estabilidad, fiabilidad y rendimiento. En una entrevista para un puesto de programador SQL, pueden hacerte preguntas sobre tus conocimientos de programación y habilidades de resolución de problemas.

Preguntas de entrevista más frecuentes para programador/a SQL y cómo responderlas

Question 1

Pregunta n.º 1: ¿Qué tipos de claves existen en SQL y cuándo las usarías?

How to answer
Respuesta recomendada: Esta pregunta te permite mostrar tus conocimientos de SQL. Explica los tipos más comunes de claves en SQL e indica cómo pueden identificar filas y columnas en las tablas. Las claves funcionan como identificadores únicos, lo que permite que los usuarios recuperen los datos con facilidad.
Question 2

Pregunta n.º 2: ¿Qué tipos de normalización existen en SQL y cuándo los usas?

How to answer
Respuesta recomendada: La normalización en SQL suele utilizarse para organizar datos y reducir redundancias. Puedes demostrar tu experiencia explicando los métodos de normalización que más usas. Por ejemplo, muchos programadores dividen una tabla grande en varias más pequeñas para facilitar la lectura.
Question 3

Pregunta n.º 3: ¿Con qué lenguajes de programación estás familiarizado?

How to answer
Respuesta recomendada: Muchos desarrolladores usan además JavaScript, HTML, Python, PL/SQL y otros lenguajes. Enumera los lenguajes que conoces y explica cómo los has usado en tu empleo anterior. Además, menciona los títulos de programación que posees.

711,068 programador sql interview questions shared by candidates

I was asked to write a program to find common items between 2 lists.I used java to write the program. I wrote the program which was iterating the smaller array list and used contains. The Hiring manager argues with me saying that the code is not efficient enough because 'contains' method on arraylist would lead to o(n) and that would result in O(m*N)(which is incorrect) In the interview, I was not able to google it and I was taken aback when he was talking so assertively as I assumed that he understands java. However, after I hung up the phone I realized that I am indeed right and that the algorithm I created was very efficient. The interviewer came to the interview with a view to reject me. Its a waste of time. They should let subject mattter experts do the interviews, not the people with background in c/C++ interview java guys or the other way round. The hiring manager seemed very professorial background. I tried to tell recruiter to let them know the problem, but I do not think even she has any clue on how to approach.
avatar

Senior Software Engineer

Interviewed at Tripadvisor

3.5★
Feb 5, 2015

I was asked to write a program to find common items between 2 lists.I used java to write the program. I wrote the program which was iterating the smaller array list and used contains. The Hiring manager argues with me saying that the code is not efficient enough because 'contains' method on arraylist would lead to o(n) and that would result in O(m*N)(which is incorrect) In the interview, I was not able to google it and I was taken aback when he was talking so assertively as I assumed that he understands java. However, after I hung up the phone I realized that I am indeed right and that the algorithm I created was very efficient. The interviewer came to the interview with a view to reject me. Its a waste of time. They should let subject mattter experts do the interviews, not the people with background in c/C++ interview java guys or the other way round. The hiring manager seemed very professorial background. I tried to tell recruiter to let them know the problem, but I do not think even she has any clue on how to approach.

You have one billion numbers, implement getRandom() which returns a random number from them. Constaints: 1. No duplicate returning value. 2. getRandom() will at most be invoked 100 million times. Then optimize for space.
avatar

Software Engineer

Interviewed at Tripadvisor

3.5★
Jan 11, 2010

You have one billion numbers, implement getRandom() which returns a random number from them. Constaints: 1. No duplicate returning value. 2. getRandom() will at most be invoked 100 million times. Then optimize for space.

The hardest problem posed was the C# function I had to write. Write a function that accepts a character parameter such as "8" and then returns its digit value which would be 8 in this case. You cannot use any helper functions, casting or conversion functions. int ParseCharToInt(char c)
avatar

Software Engineer

Interviewed at Cornerstone OnDemand

3.2★
Jan 25, 2013

The hardest problem posed was the C# function I had to write. Write a function that accepts a character parameter such as "8" and then returns its digit value which would be 8 in this case. You cannot use any helper functions, casting or conversion functions. int ParseCharToInt(char c)

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