Programador Sql Interview Questions

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.

710,433 programador sql interview questions shared by candidates

We're playing a game of Russian Roulette. I take 2 consecutive bullets out of the 6 bullet revolver and spin the chamber. I go first and shoot the bullet at my head, which misses. I then pass the gun to you, where you have the option of spinning the chamber, or shooting. Which would you do to maximize your probability of not dieing?
avatar

Software Engineer

Interviewed at Bloomberg

4
Nov 13, 2012

We're playing a game of Russian Roulette. I take 2 consecutive bullets out of the 6 bullet revolver and spin the chamber. I go first and shoot the bullet at my head, which misses. I then pass the gun to you, where you have the option of spinning the chamber, or shooting. Which would you do to maximize your probability of not dieing?

Say you use SVN for source control..you have several revisions of a file...R1, r2, r3..etc..Someone checked in a bug and the revision became bad..need t find the first bad revision..gave a function findBadRevision(int goodRevision, int badRevision) so for e.g the revisions were GGBB and function passes in 0,4 so the first bad revision is 2. There exists a function boolean hasBug(int revision) which will tell us if a certain revision has a bug. can assume good revision < bad revision
avatar

Software Engineer

Interviewed at Meta

3.5
Apr 28, 2012

Say you use SVN for source control..you have several revisions of a file...R1, r2, r3..etc..Someone checked in a bug and the revision became bad..need t find the first bad revision..gave a function findBadRevision(int goodRevision, int badRevision) so for e.g the revisions were GGBB and function passes in 0,4 so the first bad revision is 2. There exists a function boolean hasBug(int revision) which will tell us if a certain revision has a bug. can assume good revision < bad revision

1. Give you a data structure Seq class Sqe { int value; Seq nex; } and give you two Seq object seq., seq., compare two objects, return true if there is only one difference or no difference, false if more than two differences. 2. Giving a array which has zero and no-zero elements, move all zero elements to the end and no-zero elements to the begin.
avatar

Senior Software Engineer

Interviewed at Meta

3.5
Mar 4, 2015

1. Give you a data structure Seq class Sqe { int value; Seq nex; } and give you two Seq object seq., seq., compare two objects, return true if there is only one difference or no difference, false if more than two differences. 2. Giving a array which has zero and no-zero elements, move all zero elements to the end and no-zero elements to the begin.

Given a string 12345 and a alphabet to number mapping like a =1, b =2.., y=25, z=26 write a code to find number of possible alphabet strings from the given string. E.x. string 12345 has possible alphabet strings as {lcde,awde, abcde}.
avatar

Software Engineer

Interviewed at Meta

3.5
Oct 4, 2015

Given a string 12345 and a alphabet to number mapping like a =1, b =2.., y=25, z=26 write a code to find number of possible alphabet strings from the given string. E.x. string 12345 has possible alphabet strings as {lcde,awde, abcde}.

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