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About the test:

Backend Engineer Online Test bruger scenariebaserede MCQ'er til at evaluere kandidater om deres viden om backend-udvikling, som involverer design og implementering af server-side-logik, databaser og API'er til understøttelse af web- og mobilapplikationer. Testen vurderer kandidaternes færdigheder i at designe skalerbare og robuste arkitekturer, skrive effektiv kode på sprog som Java, Python eller Ruby, bygge og integrere med databaser, implementere RESTful API'er og debugging og optimere server-side-kode.

Covered skills:

  • Backend -udvikling
  • API -design
  • Objektorienteret programmering
  • Præstationsoptimering
  • Databasedesign
  • Softwarearkitektur
  • Systemdesign

9 reasons why
9 reasons why

Adaface Backend Engineer Test is the most accurate way to shortlist Backend Engineers



Reason #1

Tests for on-the-job skills

The Backend Engineer Online Test helps recruiters and hiring managers identify qualified candidates from a pool of resumes, and helps in taking objective hiring decisions. It reduces the administrative overhead of interviewing too many candidates and saves time by filtering out unqualified candidates at the first step of the hiring process.

The test screens for the following skills that hiring managers look for in candidates:

  • Dygtige til backend -udvikling ved hjælp af forskellige programmeringssprog
  • Stærk forståelse af databasedesign og -styring
  • I stand til at designe og udvikle API'er, der overholder industriens bedste praksis
  • Vidende i softwarearkitekturprincipper og mønstre
  • Dygtige til objektorienterede programmeringskoncepter og implementering
  • Erfaret med systemdesign og bygning af skalerbare applikationer
  • I stand til ydelsesoptimeringsteknikker og strategier
  • Dygtige til fejlfinding og fejlfinding af komplekse backend -problemer
  • Evne til at arbejde med og integrere tredjeparts-API'er
  • Kendskab til sikkerheds bedste praksis for backend -udvikling
  • Fortrolighed med cache -mekanismer og strategier
  • Forståelse af datastrukturer og algoritmer i backend -sammenhæng
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.

View sample questions

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.

How we design questions

Dette er kun en lille prøve fra vores bibliotek med 10.000+ spørgsmål. De faktiske spørgsmål om dette Backend Engineer Test vil være ikke-gåbart.

🧐 Question

Medium

Broker Replication
System Design
Solve
You are working on a large-scale, distributed, and fault-tolerant message processing system designed to handle high throughput and low latency requirements. The system is based on the publish-subscribe pattern and uses multiple brokers to distribute messages across various topics and partitions. In this architecture, both publishers and subscribers are considered clients. The brokers are responsible for replicating messages among themselves to ensure fault tolerance and data durability.
 image
A client reports successfully publishing a message on a specific topic. However, one of the subscribers has not received the message. To investigate the issue, you have gathered detailed logs and system design data, as shown below:
 image
Based on the information provided, which of the following is the most likely reason for the issue?

A: The message was not published on the topic
B: Client C is not subscribed to the correct topic
C: There is a replication lag between brokers B1 and B2
D: Client C is consuming from the wrong broker
E: The message processing system failed to acknowledge the message

Medium

Load Balancer Latency
Debugging
Solve
A backend service is experiencing intermittent latency spikes while processing incoming requests. The service is deployed in a multi-node environment with a load balancer in front. You suspect that the issue might be related to resource contention. You collect the following performance metrics from the affected nodes during a spike:
 image
Which of the following is the most probable cause of the latency spikes?
A: High memory usage on the affected nodes.
B: Disk I/O bottlenecks on the affected nodes.
C: Insufficient CPU resources on the affected nodes.
D: Uneven distribution of incoming requests by the load balancer.
E: Network latency between the load balancer and the backend nodes.

Medium

Decryptor
Strings
Solve
What does the following pseudo code print?
 image

Hard

Fibonacci codes
Time Complexity
Pseudo Code
Solve
Here are three pseudocodes for calculating the Nth Fibonacci number. Which of the following statements about these codes are true?
 image
A: Time complexity/efficiency of CODE 1, CODE 2, CODE 3 is the same.
B: CODE 2 is more space-efficient than CODE 3.
C: CODE 3 is more space-efficient than CODE 2.
D: CODE 2 is more time-efficient than CODE 1.
E: CODE 3 is more time-efficient than CODE 1.

Hard

Palindrome Test cases
Strings
Solve
Go through the following faulty palindrome detection pseudocode and test cases. For which of the test cases would the code return true?
 image
Testcases
A: a
B: aba
C: aaa
D: aac

Medium

Rewards Activities Order
Database Connection
Solve
A new popular app tracks the activities performed by its users and grants them rewards based on each individual's total activities performed in a year. This data is maintained in a database table (activitesinfo), with the following columns: userid, totalactivities, reward. This year, due to fundraising activity, the company has decided to further reward its users by enhancing the reward as per the following formula: If reward < = 4000, increase it by 2%, If 4000 < reward <= 8000, increase it by 4%, If reward > 8000, increase it by 6%.
The tech team has written three different scripts to calculate increment for each slab, each script is to run as a separate transaction. Here are the three scripts:
Script 1:
For users with reward <= 4000, set reward = reward * 1.02

Script 2:
For users with reward > 4000 and reward <= 8000, set reward = reward * 1.04

Script 3:
For users with reward > 8000, set reward = reward * 1.06
Each script is to be executed separately. Which of the following options will update the rewards as expected:
A: Execute Script 1 followed by Script 2 followed by Script 3
B: Execute Script 2 followed by Script 3; Script 1 running concurrently throughout
C: Execute Script 3 followed by Script 2; Script 1 running concurrently throughout
D: Execute Script 3 followed by Script 2 followed by Script 1
E: Execute Script 2 followed by Script 3 followed by Script 1

Easy

Registration Queue
Logic
Queues
Solve
We want to register students for the next semester. All students have a receipt which shows the amount pending for the previous semester. A positive amount (or zero) represents that the student has paid extra fees, and a negative amount represents that they have pending fees to be paid. The students are in a queue for the registration. We want to arrange the students in a way such that the students who have a positive amount on the receipt get registered first as compared to the students who have a negative amount. We are given a queue in the form of an array containing the pending amount.
For example, if the initial queue is [20, 70, -40, 30, -10], then the final queue will be [20, 70, 30, -40, -10]. Note that the sequence of students should not be changed while arranging them unless required to meet the condition.
⚠️⚠️⚠️ Note:
- The first line of the input is the length of the array. The second line contains all the elements of the array.
- The input is already parsed into an array of "strings" and passed to a function. You will need to convert string to integer/number type inside the function.
- You need to "print" the final result (not return it) to pass the test cases.

For the example discussed above, the input will be:
5
20 70 -40 30 -10

Your code needs to print the following to the standard output:
20 70 30 -40 -10

Medium

Visitors Count
Strings
Logic
Solve
A manager hires a staff member to keep a record of the number of men, women, and children visiting the museum daily. The staff will note W if any women visit, M for men, and C for children. You need to write code that takes the string that represents the visits and prints the count of men, woman and children. The sequencing should be in decreasing order. 
Example:

Input:
WWMMWWCCC

Expected Output: 
4W3C2M

Explanation: 
‘W’ has the highest count, then ‘C’, then ‘M’. 
⚠️⚠️⚠️ Note:
- The input is already parsed and passed to a function.
- You need to "print" the final result (not return it) to pass the test cases.
- If the input is- “MMW”, then the expected output is "2M1W" since there is no ‘C’.
- If any of them have the same count, the output should follow this order - M, W, C.
🧐 Question🔧 Skill

Medium

Broker Replication
System Design

3 mins

Backend
Solve

Medium

Load Balancer Latency
Debugging

3 mins

Backend
Solve

Medium

Decryptor
Strings

2 mins

Technical Aptitude
Solve

Hard

Fibonacci codes
Time Complexity
Pseudo Code

2 mins

Technical Aptitude
Solve

Hard

Palindrome Test cases
Strings

2 mins

Technical Aptitude
Solve

Medium

Rewards Activities Order
Database Connection

3 mins

Technical Aptitude
Solve

Easy

Registration Queue
Logic
Queues

30 mins

Coding
Solve

Medium

Visitors Count
Strings
Logic

30 mins

Coding
Solve
🧐 Question🔧 Skill💪 Difficulty⌛ Time
Broker Replication
System Design
Backend
Medium3 mins
Solve
Load Balancer Latency
Debugging
Backend
Medium3 mins
Solve
Decryptor
Strings
Technical Aptitude
Medium2 mins
Solve
Fibonacci codes
Time Complexity
Pseudo Code
Technical Aptitude
Hard2 mins
Solve
Palindrome Test cases
Strings
Technical Aptitude
Hard2 mins
Solve
Rewards Activities Order
Database Connection
Technical Aptitude
Medium3 mins
Solve
Registration Queue
Logic
Queues
Coding
Easy30 minsSolve
Visitors Count
Strings
Logic
Coding
Medium30 minsSolve
Reason #4

1200+ customers in 75 countries

customers in 75 countries
Brandon

Med Adaface var vi i stand til at optimere vores indledende screeningsproces med op til 75%, hvilket frigør dyrebar tid for både ansættelsesledere og vores talentindsamlingsteam!


Brandon Lee, Leder af mennesker, Love, Bonito

Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment Backend Engineer 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.

Science behind Adaface tests
Reason #6

1 click candidate invites

Email invites: You can send candidates an email invite to the Backend Engineer 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 & benchmarks

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


Learn more

About the Backend Engineer Assessment Test

Why you should use Pre-employment Backend Engineer Online Test?

The Backend Engineer Test makes use of scenario-based questions to test for on-the-job skills as opposed to theoretical knowledge, ensuring that candidates who do well on this screening test have the relavant skills. The questions are designed to covered following on-the-job aspects:

  • Backend -udvikling ved hjælp af forskellige programmeringssprog og rammer
  • Databasedesign og -styring med populære databasesystemer
  • API -design og udvikling til problemfri kommunikation mellem forskellige softwarekomponenter
  • Softwarearkitekturdesign og implementering til skalerbare og vedligeholdelige systemer
  • Objektorienterede programmeringsprincipper og bedste praksis
  • Systemdesign for at sikre effektiv og pålidelig ydelse
  • Ydelsesoptimeringsteknikker til forbedring af applikationshastighed og lydhørhed
  • Fejlfinding og fejlfindingsevner til at identificere og løse problemer
  • Versionskontrol ved hjælp af Git eller andre lignende værktøjer
  • Enhedstest og viden om test af rammer

Once the test is sent to a candidate, the candidate receives a link in email to take the test. For each candidate, you will receive a detailed report with skills breakdown and benchmarks to shortlist the top candidates from your pool.

What topics are covered in the Backend Engineer Online Test?

  • backend-udvikling

    backend-udvikling henviser til oprettelse og vedligeholdelse af serversiden-logikken, der driver websteder og applikationer. Det involverer opgaver såsom håndtering af datalagring, behandling af brugeranmodninger og styring af serverinfrastruktur. Måling af denne færdighed sikrer, at kandidater har en stærk forståelse af backend -teknologier og effektivt kan opbygge robuste og effektive backend -systemer.

  • databasedesign

    Databasedesign involverer design af struktur og organisering af databaser til Gem effektivt og hent data. Det inkluderer opgaver såsom at definere tabeller, skabe forhold mellem dem og optimere forespørgsler. Måling af denne færdighed hjælper med at måle en kandidats evne til at skabe skalerbare og velorganiserede databaser, hvilket er vigtigt for at opbygge pålidelige og performante applikationer.

  • API-design

    API-design fokuserer på at skabe godt- Designerede applikationsprogrammeringsgrænseflader (API'er), der muliggør kommunikation mellem forskellige softwarekomponenter. Det involverer bestemmelse af passende slutpunkter, anmodning/svarformater og godkendelsesmekanismer. Måling af denne færdighed sikrer, at kandidater kan skabe intuitive og udviklervenlige API'er, der fremmer let integration og effektivt samarbejde.

  • softwarearkitektur

    Softwarearkitektur omfatter design og organisering på højt niveau og organisering af Softwaresystemer. Det involverer at tage beslutninger om struktur, komponenter og interaktioner mellem et system for at imødekomme funktionelle og ikke-funktionelle krav. Måling af denne færdighed hjælper med at evaluere en kandidats evne til at skabe skalerbar, vedligeholdelig og tilpasningsdygtig softwarearkitekturer, der letter fleksibel og robust applikationsudvikling.

  • objektorienteret programmering

    Objektorienteret programmering (OOP ) er et programmeringsparadigme, der organiserer softwaredesign omkring objekter, der indkapsler data og opførsel. Det involverer at definere klasser, skabe genstande og bruge arv og polymorfisme. Måling af denne færdighed vurderer en kandidats færdigheder i at anvende OOP -principper og teknikker, hvilket gør det muligt for dem at skrive modulær, genanvendelig og udvidelig kode.

  • systemdesign

    Systemdesign fokuserer på at designe arkitekturen og Komponenter i store systemer. Det involverer at identificere systemkrav, specificere moduler og grænseflader og overveje skalerbarhed, fejltolerance og ydeevne. Måling af denne færdighed sikrer, at kandidater kan designe robuste og effektive systemer, der er i stand til at håndtere høje mængder data og brugere.

  • Performance Optimization

    Performance Optimization involverer forbedring af hastighed, effektivitet og ressourceudnyttelse af softwaresystemer. Det inkluderer opgaver såsom kodeprofilering, identificering af flaskehalse og implementering af optimeringer. Måling af denne færdighed hjælper med at identificere kandidater, der forstår vigtigheden af ​​at optimere softwareydelsen, hvilket gør dem i stand til at skabe meget lydhøre og skalerbare applikationer.

  • Full list of covered topics

    The actual topics of the questions in the final test will depend on your job description and requirements. However, here's a list of topics you can expect the questions for Backend Engineer Test to be based on.

    Backend -udvikling
    Frontend Development
    Databasedesign
    Relationsdatabaser
    NoSQL -databaser
    API -design
    Afslappede API'er
    Graphql
    Mikroservices
    Softwarearkitektur
    MVC Arkitektur
    Layered Architecture
    Begivenhedsdrevet arkitektur
    Objektorienteret programmering
    Arv
    Polymorfisme
    Indkapsling
    Abstraktion
    Systemdesign
    Skalerbarhed
    Høj tilgængelighed
    Belastning afbalancering
    Datapartitionering
    Præstationsoptimering
    Cache
    Forespørgseloptimering
    Samtidighed
    Fejlfinding
    Fejlfinding
    Undtagelseshåndtering
    Sikkerheds bedste praksis
    Godkendelse
    Bemyndigelse
    Kryptering
    Tredjeparts API-integration
    Oauth
    Webhooks
    Logning
    Fejlhåndtering
    Cache -strategier
    Datakonstruktioner
    Arrays
    Linkede lister
    Stabler
    Køer
    Hash borde
    Binære træer
    Grafer
    Algoritmer
    Sortering
    Søger
    Dynamisk programmering
    Rekursion
    Regelmæssige udtryk

What roles can I use the Backend Engineer Online Test for?

  • Backend Engineer
  • Fuld stakudvikler
  • Software ingeniør
  • API -udvikler
  • Softwarearkitekt

How is the Backend Engineer Online Test customized for senior candidates?

For intermediate/ experienced candidates, we customize the assessment questions to include advanced topics and increase the difficulty level of the questions. This might include adding questions on topics like

  • Erfaring med mikroservicesarkitektur
  • Forståelse af cloud computing og implementering
  • Kendskab til cache -mekanismer og teknikker
  • Designmønstre og deres anvendelse i softwareudvikling
  • Erfaring med containeriseringsteknologier som Docker
  • Færdigheder til at designe og vedligeholde afslappende API'er
  • Kendskab til sikkerheds bedste praksis inden for softwareudvikling
  • Erfaring med meddelelseskøer og begivenhedsdrevne arkitekturer
  • Forståelse af distribuerede systemer og deres udfordringer
  • Færdigheder i SQL og forespørgselsoptimering
  • Evne til at optimere applikationsydelse og skalerbarhed med cache -mekanismer

The coding question for experienced candidates will be of a higher difficulty level to evaluate more hands-on experience.

Singapore government logo

De ansættelsesledere mente, at de gennem de tekniske spørgsmål, som de stillede under panelinterviewene, kunne fortælle, hvilke kandidater der havde bedre scoringer, og differentierede med dem, der ikke scorede så godt. De er meget tilfreds med kvaliteten af ​​kandidater, der er på listen med Adaface -screeningen.


85%
Reduktion i screeningstid

Backend Engineer Hiring Test FAQS

Kan jeg kombinere flere færdigheder i en brugerdefineret vurdering?

Ja absolut. Brugerdefinerede vurderinger er oprettet baseret på din jobbeskrivelse og vil omfatte spørgsmål om alle must-have-færdigheder, du angiver.

Har du nogen anti-cheating eller proctoring-funktioner på plads?

Vi har følgende anti-cheating-funktioner på plads:

  • Ikke-gåbare spørgsmål
  • IP Proctoring
  • Webproctoring
  • Webcam Proctoring
  • Detektion af plagiering
  • Sikker browser

Læs mere om Proctoring Features.

Hvordan fortolker jeg testresultater?

Den primære ting at huske på er, at en vurdering er et elimineringsværktøj, ikke et udvælgelsesværktøj. En færdighedsvurdering er optimeret for at hjælpe dig med at eliminere kandidater, der ikke er teknisk kvalificerede til rollen, den er ikke optimeret til at hjælpe dig med at finde den bedste kandidat til rollen. Så den ideelle måde at bruge en vurdering på er at beslutte en tærskelværdi (typisk 55%, vi hjælper dig med benchmark) og inviterer alle kandidater, der scorer over tærsklen for de næste interviewrunder.

Hvilken oplevelsesniveau kan jeg bruge denne test til?

Hver Adaface -vurdering tilpasses til din jobbeskrivelse/ ideel kandidatperson (vores emneeksperter vælger de rigtige spørgsmål til din vurdering fra vores bibliotek på 10000+ spørgsmål). Denne vurdering kan tilpasses til ethvert erfaringsniveau.

Får hver kandidat de samme spørgsmål?

Ja, det gør det meget lettere for dig at sammenligne kandidater. Valgmuligheder for MCQ -spørgsmål og rækkefølgen af ​​spørgsmål randomiseres. Vi har anti-cheating/proctoring funktioner på plads. I vores virksomhedsplan har vi også muligheden for at oprette flere versioner af den samme vurdering med spørgsmål om lignende vanskelighedsniveauer.

Jeg er kandidat. Kan jeg prøve en øvelsestest?

Nej. Desværre understøtter vi ikke praksisforsøg i øjeblikket. Du kan dog bruge vores eksempler på spørgsmål til praksis.

Hvad er omkostningerne ved at bruge denne test?

Du kan tjekke vores prisplaner.

Kan jeg få en gratis prøve?

Ja, du kan tilmelde dig gratis og forhåndsvise denne test.

Jeg flyttede lige til en betalt plan. Hvordan kan jeg anmode om en brugerdefineret vurdering?

Her er en hurtig guide til hvordan man anmoder om en brugerdefineret vurdering på adaface.

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40 min tests.
No trick questions.
Accurate shortlisting.
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