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About the test:

The Blockchain Developer Online Test uses scenario-based multiple choice questions to evaluate candidates on their technical knowledge and practical skills related to blockchain development, covering topics such as blockchain architecture, consensus algorithms, smart contracts, cryptocurrency, token economics, decentralized applications (dApps), and blockchain security. The test aims to determine candidates' ability to build innovative blockchain solutions that solve real-world problems and meet business needs.

Covered skills:

  • Participant Roles
  • Chain code
  • Validation
  • Hyperledger Composer
See all covered skills

9 reasons why
9 reasons why

Adaface Blockchain Developer Test is the most accurate way to shortlist Blockchain Developers



Reason #1

Tests for on-the-job skills

La prueba de desarrollador de blockchain ayuda a los reclutadores y gerentes de contratación a identificar candidatos calificados de un grupo de currículums, y ayuda a tomar decisiones de contratación de objetivos. Reduce la sobrecarga administrativa de entrevistar a demasiados candidatos y ahorra tiempo filtrando candidatos no calificados.

El desarrollador de blockchain de Adaface, las pantallas de prueba en línea, los candidatos para los reclutadores de habilidades típicas buscan roles administradores/especialistas de SharePoint:

  • Experiencia trabajando con grandes bases de código
  • Experiencia con proyectos de código abierto
  • Competencia en C ++, Java, JavaScript
  • Conocimiento de algoritmos comunes y estructuras de datos
  • Familiaridad con la criptografía y las redes P2P
  • Conocimiento de la concurrencia y la escritura de código multiproceso eficiente y seguro

Los reclutadores y los gerentes de contratación pueden utilizar las ideas generadas a partir de esta evaluación para identificar a los mejores candidatos para los roles de desarrolladores de blockchain. Las características anti-trato le permiten sentirse cómodo realizando evaluaciones en línea. La prueba en línea de Blockchain Developer es ideal para ayudar a los reclutadores a identificar qué candidatos tienen las habilidades para hacer bien en el trabajo.

Reason #2

No trick questions

no trick questions

Traditional assessment tools use trick questions and puzzles for the screening, which creates a lot of frustration among candidates about having to go through irrelevant screening assessments.

The main reason we started Adaface is that traditional pre-employment assessment platforms are not a fair way for companies to evaluate candidates. At Adaface, our mission is to help companies find great candidates by assessing on-the-job skills required for a role.

Why we started Adaface ->
Reason #3

Non-googleable questions

We have a very high focus on the quality of questions that test for on-the-job skills. Every question is non-googleable and we have a very high bar for the level of subject matter experts we onboard to create these questions. We have crawlers to check if any of the questions are leaked online. If/ when a question gets leaked, we get an alert. We change the question for you & let you know.

These are just a small sample from our library of 10,000+ questions. The actual questions on this Blockchain Developer Test will be non-googleable.

🧐 Question

Medium

51% Attacks
Solve
A 51% attack is perhaps the most discussed threat to any public Blockchain asset. A 51% attack happens when a certain miner or mining pool, that owns more than 50% of all the network’s hashing power, acts maliciously to disturb the network’s operation.
For example: Two Bitcoin Cash mining pools, carried out a 51% attack on the Bitcoin Cash blockchain in order to stop an unknown miner from taking coins that they weren’t supposed to have access to, while the network forked.
Which of the following CAN be done by a miner employing a 51% attack?

A: Double spend their coins
B: Reverse confirmed transactions
C: Steal funds from a certain address
D: Prevent transactions from being confirmed
E: Create false transactions that never happened

Medium

Evidence
Solve
Breed Chasing, solo engineer is planning to create new cryptocurrency, NEWCRAIGLIST and build a blockchain that facilitates buying and selling second-hand items with NEWCRAIGLIST from each other. Breed expects the platform to be used for international transactions and devised the following process:

- Before a transaction is considered complete, the purchaser must put the funds in an escrow service
- The sender must enter the courier tracking number into that same escrow
Palmart, toy store giant in US is asked by lawmakers to provide evidence that proves the store’s toys are not produced through child labour. Palmart’s toys are transferred between 7 parties between creation and placement at the store. Palmart is considering using blockchain to solve this problem. Discretion in the reading and writing of transactions is highly important to the store chain to protect its proprietary interests. Review the following possible solutions and pick the best approach that solves Palmart’s problem:
Option A:
Use a public blockchain that supports assets.
Then create a new toy asset for each item created. 
When the toy is transferred to the next party, mandate that the associated blockchain asset to be transferred to the next party's blockchain account with required metadata.
Lawmakers can now view transactions and transfers at any time.

Option B: 
Use a permissioned blockchain.
Require that every party involved in the process to host a node on the Palmart's network. 
Create a new toy asset for each item created. 
When the toy is transferred to the next party in the process, have the previous party use a web portal to initialize a chain code Smart Contract to transfer control of the asset. 
When the next party receives the asset have them use a web portal to initialize a chain code Smart Contracts to acknowledge receipt of the asset. 
Provide read-only permissions to the lawmakers so they can receive the evidence they are looking for.
🧐 Question🔧 Skill

Medium

51% Attacks
3 mins
Blockchain
Solve

Medium

Evidence
3 mins
Blockchain
Solve
🧐 Question🔧 Skill💪 Difficulty⌛ Time
51% Attacks
Blockchain
Medium3 mins
Solve
Evidence
Blockchain
Medium3 mins
Solve
Reason #4

1200+ customers in 75 countries

customers in 75 countries
Brandon

With Adaface, we were able to optimise our initial screening process by upwards of 75%, freeing up precious time for both hiring managers and our talent acquisition team alike!


Brandon Lee, Head of People, Love, Bonito

Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment Blockchain Developer Test in your hiring process is that it is an elimination tool, not a selection tool. In other words: you want to use the test to eliminate the candidates who do poorly on the test, not to select the candidates who come out at the top. While they are super valuable, pre-employment tests do not paint the entire picture of a candidate’s abilities, knowledge, and motivations. Multiple easy questions are more predictive of a candidate's ability than fewer hard questions. Harder questions are often "trick" based questions, which do not provide any meaningful signal about the candidate's skillset.

Reason #6

1 click candidate invites

Email invites: You can send candidates an email invite to the Blockchain Developer Test from your dashboard by entering their email address.

Public link: You can create a public link for each test that you can share with candidates.

API or integrations: You can invite candidates directly from your ATS by using our pre-built integrations with popular ATS systems or building a custom integration with your in-house ATS.

invite candidates
Reason #7

Detailed scorecards & comparative results

Reason #8

High completion rate

Adaface tests are conversational, low-stress, and take just 25-40 mins to complete.

This is why Adaface has the highest test-completion rate (86%), which is more than 2x better than traditional assessments.

test completion rate
Reason #9

Advanced Proctoring


Acerca de los roles de desarrollador de blockchain

Blockchain es un libro mayor compartido e inmutable que facilita el proceso de grabación de transacciones y seguimiento de activos en una red comercial.

Un desarrollador de blockchain es alguien que crea y optimiza los protocolos de blockchain, diseña la arquitectura de los sistemas blockchain y crea contratos inteligentes y aplicaciones web que utilizan tecnología blockchain.

Las responsabilidades típicas del desarrollador de blockchain incluyen:

  • Investigar, diseñar, desarrollar y probar tecnologías blockchain
  • Lluvia de ideas y ayuda a evaluar las aplicaciones para nuevas herramientas y tecnologías a medida que evolucionan continuamente
  • Mantener y extender las aplicaciones actuales del cliente y servidor responsables de la integración y la lógica comercial
  • Documentar nuevas soluciones y mantener la de las existentes

What roles can I use the Blockchain Developer Test for?

  • Blockchain Developer
  • Blockchain Engineer

What topics are covered in the Blockchain Developer Test?

Base de datos distribuida descentralizada
Blockchain de bitcoin
Blockchain de Ethereum
Tipos de blockchains
Registros
Sistemas descentralizados
Libro mayor distribuido
Acuñación
Encriptación
Bloques
Identificadores de bloque
Árboles de merkle
Libro mayor incorruptible
Prueba de trabajo
Prueba de estanque
Gasto doble
Algoritmos criptográficos
Firma ciega
Intercambio secreto
Transacciones fuera de cadena
Contabilidad ejecutiva
51% de ataque
Politica de seguridad
Algoritmos de consenso
Algoritmo RSA
Singapore government logo

The hiring managers felt that through the technical questions that they asked during the panel interviews, they were able to tell which candidates had better scores, and differentiated with those who did not score as well. They are highly satisfied with the quality of candidates shortlisted with the Adaface screening.


85%
reduction in screening time

FAQs

¿Puedo combinar múltiples habilidades en una evaluación personalizada?

Si, absolutamente. Las evaluaciones personalizadas se configuran en función de la descripción de su trabajo e incluirán preguntas sobre todas las habilidades imprescindibles que especifique.

¿Tiene alguna característica anti-trato o procuración en su lugar?

Tenemos las siguientes características anti-trate en su lugar:

  • Preguntas no postradas
  • Procuración de IP
  • Procedor web
  • Procedores de cámara web
  • Detección de plagio
  • navegador seguro

Lea más sobre las funciones de procuración.

¿Cómo interpreto los puntajes de las pruebas?

Lo principal a tener en cuenta es que una evaluación es una herramienta de eliminación, no una herramienta de selección. Una evaluación de habilidades está optimizada para ayudarlo a eliminar a los candidatos que no están técnicamente calificados para el rol, no está optimizado para ayudarlo a encontrar el mejor candidato para el papel. Por lo tanto, la forma ideal de usar una evaluación es decidir un puntaje umbral (generalmente del 55%, lo ayudamos a comparar) e invitar a todos los candidatos que obtienen un puntaje por encima del umbral para las próximas rondas de la entrevista.

¿Para qué nivel de experiencia puedo usar esta prueba?

Cada evaluación de AdaFace está personalizada para su descripción de trabajo/ persona candidata ideal (nuestros expertos en la materia elegirán las preguntas correctas para su evaluación de nuestra biblioteca de más de 10000 preguntas). Esta evaluación se puede personalizar para cualquier nivel de experiencia.

¿Cada candidato tiene las mismas preguntas?

Sí, te hace mucho más fácil comparar los candidatos. Las opciones para las preguntas de MCQ y el orden de las preguntas son aleatorizados. Tenemos características anti-trato/procuración en su lugar. En nuestro plan empresarial, también tenemos la opción de crear múltiples versiones de la misma evaluación con cuestiones de niveles de dificultad similares.

Soy candidato. ¿Puedo probar una prueba de práctica?

No. Desafortunadamente, no apoyamos las pruebas de práctica en este momento. Sin embargo, puede usar nuestras preguntas de muestra para la práctica.

¿Cuál es el costo de usar esta prueba?

Puede consultar nuestros planes de precios.

¿Puedo obtener una prueba gratuita?

Sí, puede registrarse gratis y previsualice esta prueba.

Me acabo de mudar a un plan pagado. ¿Cómo puedo solicitar una evaluación personalizada?

Aquí hay una guía rápida sobre cómo solicitar una evaluación personalizada en Adaface.

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No trick questions.
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