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About the test:

Data Wrangling Test evaluerer en kandidats færdigheder i rengøring, omdannelse og organisering af rå data til et struktureret format, der er egnet til analyse. Det tester deres forståelse af datamodellering, fortolkning, analyse og indgangsprocesser.

Covered skills:

  • Dataekstraktion
  • Dataintegration
  • Data validering
  • Datatolkning
  • Data parsing
  • Kvalitetsvurdering
  • Datamodellering
  • Dataanalyse

9 reasons why
9 reasons why

Adaface Data Wrangling Assessment Test is the most accurate way to shortlist Dataanalytikers



Reason #1

Tests for on-the-job skills

The Data Wrangling 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:

  • Evne til at udtrække data fra forskellige kilder
  • Evne til at analysere og rengøre data
  • Evne til at integrere og kombinere data fra flere kilder
  • Evne til at vurdere kvaliteten af ​​data
  • Evne til at validere data og identificere eventuelle uoverensstemmelser
  • Evne til at oprette datamodeller
  • Evne til at fortolke data og drage meningsfulde konklusioner
  • Evne til at analysere data ved hjælp af statistiske metoder og værktøjer
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 Data Wrangling Test vil være ikke-gåbart.

🧐 Question

Easy

Healthcare System
Data Integrity
Normalization
Referential Integrity
Solve
You are designing a data model for a healthcare system with the following requirements:
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A: A separate table for each entity with foreign keys as specified, and a DoctorPatient table linking Doctors to Patients.
B: A separate table for each entity with foreign keys as specified, without additional tables.
C: A combined PatientDoctor table replacing Patient and Doctor, and separate tables for Appointment and Prescription.
D: A separate table for each entity with foreign keys, and a PatientPrescription table to track prescriptions directly linked to patients.
E: A single table combining Patient, Doctor, Appointment, and Prescription into one.
F: A separate table for each entity with foreign keys as specified, and an AppointmentDetails table linking Appointments to Prescriptions.

Hard

ER Diagram and minimum tables
ER Diagram
Solve
Look at the given ER diagram. What do you think is the least number of tables we would need to represent M, N, P, R1 and R2?
 image
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Medium

Normalization Process
Normalization
Database Design
Anomaly Elimination
Solve
Consider a healthcare database with a table named PatientRecords that stores patient visit information. The table has the following attributes:

- VisitID
- PatientID
- PatientName
- DoctorID
- DoctorName
- VisitDate
- Diagnosis
- Treatment
- TreatmentCost

In this table:

- Each VisitID uniquely identifies a patient's visit and is associated with one PatientID.
- PatientID is associated with exactly one PatientName.
- Each DoctorID is associated with a unique DoctorName.
- TreatmentCost is a fixed cost based on the Treatment.

Evaluating the PatientRecords table, which of the following statements most accurately describes its normalization state and the required actions for higher normalization?
A: The table is in 1NF. To achieve 2NF, remove partial dependencies by separating Patient information (PatientID, PatientName) and Doctor information (DoctorID, DoctorName) into different tables.
B: The table is in 2NF. To achieve 3NF, remove transitive dependencies by creating separate tables for Patients (PatientID, PatientName), Doctors (DoctorID, DoctorName), and Visits (VisitID, PatientID, DoctorID, VisitDate, Diagnosis, Treatment, TreatmentCost).
C: The table is in 3NF. To achieve BCNF, adjust for functional dependencies such as moving DoctorName to a separate Doctors table.
D: The table is in 1NF. To achieve 3NF, create separate tables for Patients, Doctors, and Visits, and remove TreatmentCost as it is a derived attribute.
E: The table is in 2NF. To achieve 4NF, address any multi-valued dependencies by separating Visit details and Treatment details.
F: The table is in 3NF. To achieve 4NF, remove multi-valued dependencies related to VisitID.

Medium

University Courses
ER Diagrams
Complex Relationships
Integrity Constraints
Solve
 image
Based on the ER diagram, which of the following statements is accurate and requires specific knowledge of the ER diagram's details?
A: A Student can major in multiple Departments.
B: An Instructor can belong to multiple Departments.
C: A Course can be offered by multiple Departments.
D: Enrollment records can link a Student to multiple Courses in a single semester.
E: Each Course must be associated with an Enrollment record.
F: A Department can offer courses without having any instructors.

Medium

Dividends
Financial Analysis
Percentage and Average Calculations
Solve
Consider the following line chart which shows the money invested by a company in production each year and the sales made by the company each year. If the pie chart shows the shareholding pattern of the company and the company gives 10% of the profit as dividends to its share holders then what is the average dividend received by retail investors from 2000 to 2004?
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Medium

Laptop Brands
Proportions and Percentages
Financial Reasoning
Solve
Given below is the list of laptop brands and their details in which some data is missing. If the cost price of Dell is 3/5 of the cost price of Lenovo, then what will be the %profit of Dell?
 image

Hard

Median
Trend Analysis
Statistical Reasoning
Solve
 Consider the following line chart which shows the sales of five different companies from 2000 to 2009. Which of the following companies has the maximum percentage increase in the median from 2000 to 2004 and 2005 to 2009.
 image

Medium

Hiring Developer
Skewed Data
Graph
Solve
Two companies A and B hired developers from the year 2001 to 2005. The given bar graph shows the hiring details. 
 image
 image
Now select the statements that are true based on the given details.

A: The data given for Company A is skewed to the left.
B: The data given for Company B is skewed to the right.
C: The data given for Company A is skewed to the right.
D: For Company B, mean and mode are equal.
E: For Company B, mean is equal to median but less than mode.
F: For Company A, median is less than mode but greater than mean.

Medium

Negative correlation
Solve
Saffi, one of the popular schools in San Francisco did a school wide study of the students in middle school. The study found that there is a negative correlation between the time spent on Facebook per day by students and their academic achievement. How can we understand the results of this study?
A: An increase in time spent on Facebook per day causes a drop in the academic achievement of students at the middle school level.

B: There is an association between an increase in time spent on Facebook per day and the drop in the academic achievement of students at Saffi. 

C: An increase in the time spent on Facebook per day causes a drop in the academic achievement of students at Saffi. 

D: There is an association between an increase in time spent on Facebook per day and the drop in the academic achievement of students at the middle school level.
🧐 Question🔧 Skill

Easy

Healthcare System
Data Integrity
Normalization
Referential Integrity

2 mins

Data Modeling
Solve

Hard

ER Diagram and minimum tables
ER Diagram

2 mins

Data Modeling
Solve

Medium

Normalization Process
Normalization
Database Design
Anomaly Elimination

3 mins

Data Modeling
Solve

Medium

University Courses
ER Diagrams
Complex Relationships
Integrity Constraints

2 mins

Data Modeling
Solve

Medium

Dividends
Financial Analysis
Percentage and Average Calculations

3 mins

Data Interpretation
Solve

Medium

Laptop Brands
Proportions and Percentages
Financial Reasoning

2 mins

Data Interpretation
Solve

Hard

Median
Trend Analysis
Statistical Reasoning

3 mins

Data Interpretation
Solve

Medium

Hiring Developer
Skewed Data
Graph

3 mins

Data Analysis
Solve

Medium

Negative correlation

2 mins

Data Analysis
Solve
🧐 Question🔧 Skill💪 Difficulty⌛ Time
Healthcare System
Data Integrity
Normalization
Referential Integrity
Data Modeling
Easy2 mins
Solve
ER Diagram and minimum tables
ER Diagram
Data Modeling
Hard2 mins
Solve
Normalization Process
Normalization
Database Design
Anomaly Elimination
Data Modeling
Medium3 mins
Solve
University Courses
ER Diagrams
Complex Relationships
Integrity Constraints
Data Modeling
Medium2 mins
Solve
Dividends
Financial Analysis
Percentage and Average Calculations
Data Interpretation
Medium3 mins
Solve
Laptop Brands
Proportions and Percentages
Financial Reasoning
Data Interpretation
Medium2 mins
Solve
Median
Trend Analysis
Statistical Reasoning
Data Interpretation
Hard3 mins
Solve
Hiring Developer
Skewed Data
Graph
Data Analysis
Medium3 mins
Solve
Negative correlation
Data Analysis
Medium2 mins
Solve
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 mod 75 %, hvilket frigjorde kostbar tid for både ansættelsesledere og vores talentanskaffelsesteam!


Brandon Lee, Leder af mennesker, Love, Bonito

Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment Data Wrangling 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 Data Wrangling 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

Se prøvescorekort
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 Data Wrangling Online Test

Why you should use Pre-employment Data Wrangling Test?

The Data Wrangling 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:

  • Dataekstraktion ved hjælp af forskellige metoder
  • Data parsing med præcision og nøjagtighed
  • Dataintegration for problemfri dataflow
  • Kvalitetsvurdering for at sikre dataintegritet
  • Datavalidering for at identificere og korrigere fejl
  • Datamodellering til effektiv repræsentation
  • Datatolkning for at udlede indsigt
  • Dataanalyse ved hjælp af statistiske teknikker
  • Håndtering af undtagelser og fejl i datamanipulation
  • Effektiv styring af store datasæt

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 Data Wrangling Test?

  • Data-parsing

    Data-parsing involverer opdeling af komplekse datastrukturer i mindre , meningsfulde komponenter. Det er vigtigt at måle denne færdighed til at evaluere kandidatens evne til at udtrække specifikke oplysninger og manipulere data til videre behandling.

  • dataintegration

    Dataintegration henviser til at kombinere data fra forskellige kilder til en Unified og konsistent format til analyse. Testning af denne færdighed hjælper med at bestemme kandidatens dygtighed til at fusionere datasæt og forberede dem til nøjagtig dataanalyse og rapportering.

  • kvalitetsvurdering

    Kvalitetsvurdering involverer evaluering af pålideligheden, nøjagtigheden og fuldstændigheden af ​​data . Denne færdighed måles i testen for at vurdere kandidatens evne til at identificere og rette op på uoverensstemmelser, fejl eller duplikationer i det indsamlede datasæt.

  • datavalidering

    Datavalidering indebærer verifikation af integriteten og nøjagtighed af data ved at udføre valideringskontrol baseret på definerede regler eller begrænsninger. Måling af denne færdighed hjælper med at evaluere kandidatens dygtighed til at identificere og løse problemer med datakvalitet for at sikre datakonsistens og pålidelighed at understøtte effektiv datastyring og analyse. Denne færdighed måles i testen for at vurdere kandidatens evne til at skabe strukturerede datamodeller, der muliggør effektiv dataorganisation, opbevaring og hentning.

  • datatolkning

    Datatolkning henviser til forståelsen og analyse af data for at udlede meningsfuld indsigt og tage informerede beslutninger. Testning af denne færdighed hjælper med at evaluere kandidatens evne til at fortolke datavisualisering, statistisk analyse og andre teknikker til at udtrække værdifuld information.

  • dataanalyse

    Dataanalyse involverer anvendelse af statistiske og analytiske metoder til undersøgelse , transformere og evaluere data for at drage konklusioner og tage datadrevne beslutninger. Test af denne færdighed hjælper med at vurdere kandidatens dygtighed i at bruge forskellige teknikker og værktøjer til at afdække mønstre, tendenser, korrelationer og outliers i dataene.

  • 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 Data Wrangling Test to be based on.

    Dataekstraktion
    Webskrabning
    API -integration
    Regex
    Datarensning
    Datatransformation
    Data fusionering
    Data deduplikation
    Dataprofilering
    Data validering
    Data -revision
    Modellering af enhedsforhold
    Dimensionel modellering
    Datatolkning
    Datavisualisering
    Beskrivende statistik
    Hypotese testning
    Regressions analyse
    Tidsserieanalyse
    Korrelationsanalyse
    Prøveudtagning af data
    Dataudforskning
    Dataaggregering
    Datafiltrering
    Datatransformation
    Datavisualiseringsteknikker
    Dataklassificering
    Dataklynge
    Datasammendrag
    Geospatial analyse

What roles can I use the Data Wrangling Test for?

  • Dataanalytiker
  • Dataforsker
  • Dataingeniør
  • Dataarkitekt
  • Business analytiker
  • Database Administrator
  • Datakvalitetsanalytiker
  • Specialisering af datavisualisering
  • Machine Learning Engineer
  • Kvantitativ analytiker

How is the Data Wrangling 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

  • Identificering af mønstre og tendenser i data
  • Anvendelse af datakranglingsteknikker til rengøring af data
  • Optimering af datalagring og hentning
  • Implementering af datatransformationsoperationer
  • Oprettelse af datarørledninger til automatisering
  • Udførelse af funktionsteknik til forudsigelig modellering
  • Implementering af avanceret datavisualisering
  • Gennemførelse af hypotesetest for datavalidering
  • Anvendelse af maskinlæringsalgoritmer til forudsigelig analyse
  • Design af datadrevne strategier for forretningsbeslutninger
Singapore government logo

Ansættelseslederne mente, at de gennem de tekniske spørgsmål, som de stillede under panelinterviewene, var i stand til at fortælle, hvilke kandidater der havde bedre score og differentieret sig med dem, der ikke scorede så godt. De er meget tilfreds med kvaliteten af ​​de kandidater, der er nomineret med Adaface-screeningen.


85%
Reduktion i screeningstid

Data Wrangling Hiring Test Ofte stillede spørgsmål

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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