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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.

711,453 programador sql interview questions shared by candidates

The first question is two find the largest and second largest value at each level of a binary tree. You don't need to return all values, just print out instead. the second question is to return a value in an array with the probability proportional to the weight of the value within the array. For example, in an array [4,5,6], return 4 with probability 4/15, 5 with 5/15 and 6 with 6/15. You are given a function that returns a random real number between 0 and 1
avatar

Software Engineer

Interviewed at Meta

3.5★
Nov 7, 2016

The first question is two find the largest and second largest value at each level of a binary tree. You don't need to return all values, just print out instead. the second question is to return a value in an array with the probability proportional to the weight of the value within the array. For example, in an array [4,5,6], return 4 with probability 4/15, 5 with 5/15 and 6 with 6/15. You are given a function that returns a random real number between 0 and 1

In most cases you need to have some experience with CUDA. If you want to increase your chances of getting a job offer you need to know very well about linked lists. We used the collabedit.com for the interview. It is like a chat but for coding. I got the following question on the screen of collabedit: // There is a chunk of memory in the kernel address space represented by kernelResource and an API exists to clear it. An IOCTL path exists to take a request from user-mode and using O/S services eventually dispatches to API_ZeroResource. From a security perspective what concerns do you have with this implementation? How would you fix them? // // KERNEL // BYTE kernelResource[10] = {0}; int API_ZeroResource( in_params *pParams ) { if (pParams->offset + pParams->length > sizeof(kernelResource)) return ERR_INVALID_LIMIT; memset(kernelResource + pParams->offset, 0, pParams->length); return 0; } // // USER // void ZeroResource() { in_params params = { ??? }; // an ioctl path exists to call API_ZeroResource ioctl( CMD_ZeroResource, &params ); }
avatar

Software Engineer

Interviewed at NVIDIA

4.4★
May 13, 2016

In most cases you need to have some experience with CUDA. If you want to increase your chances of getting a job offer you need to know very well about linked lists. We used the collabedit.com for the interview. It is like a chat but for coding. I got the following question on the screen of collabedit: // There is a chunk of memory in the kernel address space represented by kernelResource and an API exists to clear it. An IOCTL path exists to take a request from user-mode and using O/S services eventually dispatches to API_ZeroResource. From a security perspective what concerns do you have with this implementation? How would you fix them? // // KERNEL // BYTE kernelResource[10] = {0}; int API_ZeroResource( in_params *pParams ) { if (pParams->offset + pParams->length > sizeof(kernelResource)) return ERR_INVALID_LIMIT; memset(kernelResource + pParams->offset, 0, pParams->length); return 0; } // // USER // void ZeroResource() { in_params params = { ??? }; // an ioctl path exists to call API_ZeroResource ioctl( CMD_ZeroResource, &params ); }

An operation "swap" means removing an element from the array and appending it at the back of the same array. Find the minimum number of "swaps" needed to sort that array. Eg :- 3124 Output: 2 (3124->1243->1234) How to do it less than O(n^2) ?
avatar

Software Engineer Intern

Interviewed at Meta

3.5★
Nov 3, 2012

An operation "swap" means removing an element from the array and appending it at the back of the same array. Find the minimum number of "swaps" needed to sort that array. Eg :- 3124 Output: 2 (3124->1243->1234) How to do it less than O(n^2) ?

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