Why you should use Java & SQL Online Test?

The Java & SQL -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: Forståelse af Java Basics Dygtige til objektorienterede programmeringskoncepter Evne til at håndtere undtagelser effektivt Stærk viden om SQL Basics Ekspertise inden for databasedesign Færdighed i forespørgsel og manipulering af data Dygtige i Java -kodning Erfaring med designmønstre Dygtige til multithreading og samtidighed Kendskab til servlets og JSP

Java & SQL Online Test

Q: What topics are covered in the Java & SQL Online Test?

Java Basics Objektorienteret programmering Undtagelser SQL Basics Databasedesign Forespørgsel og manipulering af data Java -kodning

About the test:

Java SQL -testen evaluerer kandidater om deres evne til at arbejde med relationelle databaser ved hjælp af Java -programmeringssprog. Testen vurderer kandidater til grundlæggende til avancerede koncepter om SQL -forespørgsler, databasedesign og Java -programmering. Nøglefærdigheder og emner, der evalueres, inkluderer forståelse af relationelle databaser, SQL -forespørgsler, Java -databaseforbindelse (JDBC), datamodellering og datamanipulation ved hjælp af Java. Testen inkluderer også et kodningsspørgsmål til test af praktiske programmeringsevner.

Covered skills:

Java Basics
Undtagelser
Databasedesign
Java -kodning

Objektorienteret programmering
SQL Basics
Forespørgsel og manipulering af data

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9 reasons why

Adaface Java & SQL Test is the most accurate way to shortlist Java -udviklers

Reason #1

Tests for on-the-job skills

The Java & SQL 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:

Demonstrerer færdigheder i Java Basics
Anvender objektorienterede programmeringskoncepter effektivt
Håndterer undtagelser og fejl effektivt
Viser en stærk forståelse af SQL Basics
Demonstrerer viden om principper for databasedesign
I stand til at forespørge og manipulere data i SQL -databaser
Kompetent i Java -kodning

Reason #2

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

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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 Java & SQL -test vil være ikke-gåbart.

🧐 Question
Easy Custom Exception Exception Handling Custom Exceptions	Solve
What does the following code output?
Hard Holding References	Solve
What does the following Java code output?
Medium Abstract Interface OOPs Interfaces	Solve
Given following interface: Which of these are correct classes?
Medium Garbage Collection Garbage Collection	Solve
After which line is "bs" object, created on Line 4, eligible for garbage collection?
Hard Static Init Blocks OOPs	Solve
What does the following code output? 1) G A B E D H 2) G B A D E H 3) G B A D E H C F 4) C F G A B E D H 5) C F G B A D E H 6) G C F A B E D H 7) G C F B A D E H
Medium Multi Select JOIN GROUP BY	Solve
Consider the following SQL table: How many rows does the following SQL query return?
Medium nth highest sales Nested queries User Defined Functions	Solve
Consider the following SQL table: Which of the following SQL commands will find the ‘nth highest Sales’ if it exists (returns null otherwise)?
Medium Select & IN Nested queries	Solve
Consider the following SQL table: Which of the following SQL queries would return the year when neither a football or cricket winner was chosen?
Medium Sorting Ubers Nested queries Join Comparison operators	Solve
Consider the following SQL table: What will be the first two tuples resulting from the following SQL command?
Hard With, AVG & SUM MAX() MIN() Aggregate functions	Solve
Consider the following SQL table: How many tuples does the following query return?
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
	Easy Custom Exception Exception Handling Custom Exceptions	2 mins Java	Solve
What does the following code output?
	Hard Holding References	2 mins Java	Solve
What does the following Java code output?
	Medium Abstract Interface OOPs Interfaces	2 mins Java	Solve
Given following interface: Which of these are correct classes?
	Medium Garbage Collection Garbage Collection	2 mins Java	Solve
After which line is "bs" object, created on Line 4, eligible for garbage collection?
	Hard Static Init Blocks OOPs	2 mins Java	Solve
What does the following code output? 1) G A B E D H 2) G B A D E H 3) G B A D E H C F 4) C F G A B E D H 5) C F G B A D E H 6) G C F A B E D H 7) G C F B A D E H
	Medium Multi Select JOIN GROUP BY	2 mins SQL	Solve
Consider the following SQL table: How many rows does the following SQL query return?
	Medium nth highest sales Nested queries User Defined Functions	3 mins SQL	Solve
Consider the following SQL table: Which of the following SQL commands will find the ‘nth highest Sales’ if it exists (returns null otherwise)?
	Medium Select & IN Nested queries	3 mins SQL	Solve
Consider the following SQL table: Which of the following SQL queries would return the year when neither a football or cricket winner was chosen?
	Medium Sorting Ubers Nested queries Join Comparison operators	3 mins SQL	Solve
Consider the following SQL table: What will be the first two tuples resulting from the following SQL command?
	Hard With, AVG & SUM MAX() MIN() Aggregate functions	2 mins SQL	Solve
Consider the following SQL table: How many tuples does the following query return?
	Easy Registration Queue Logic Queues	30 mins Coding	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	30 mins Coding	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	💪 Difficulty	⌛ Time
	Custom Exception Exception Handling Custom Exceptions	Java	Easy	2 mins	Solve
What does the following code output?
	Holding References	Java	Hard	2 mins	Solve
What does the following Java code output?
	Abstract Interface OOPs Interfaces	Java	Medium	2 mins	Solve
Given following interface: Which of these are correct classes?
	Garbage Collection Garbage Collection	Java	Medium	2 mins	Solve
After which line is "bs" object, created on Line 4, eligible for garbage collection?
	Static Init Blocks OOPs	Java	Hard	2 mins	Solve
What does the following code output? 1) G A B E D H 2) G B A D E H 3) G B A D E H C F 4) C F G A B E D H 5) C F G B A D E H 6) G C F A B E D H 7) G C F B A D E H
	Multi Select JOIN GROUP BY	SQL	Medium	2 mins	Solve
Consider the following SQL table: How many rows does the following SQL query return?
	nth highest sales Nested queries User Defined Functions	SQL	Medium	3 mins	Solve
Consider the following SQL table: Which of the following SQL commands will find the ‘nth highest Sales’ if it exists (returns null otherwise)?
	Select & IN Nested queries	SQL	Medium	3 mins	Solve
Consider the following SQL table: Which of the following SQL queries would return the year when neither a football or cricket winner was chosen?
	Sorting Ubers Nested queries Join Comparison operators	SQL	Medium	3 mins	Solve
Consider the following SQL table: What will be the first two tuples resulting from the following SQL command?
	With, AVG & SUM MAX() MIN() Aggregate functions	SQL	Hard	2 mins	Solve
Consider the following SQL table: How many tuples does the following query return?
	Registration Queue Logic Queues	Coding	Easy	30 mins	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
	Visitors Count Strings Logic	Coding	Medium	30 mins	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.

Reason #4

1200+ customers in 75 countries

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

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Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment Java & SQL -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 Java & SQL -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.

Reason #7

Detailed scorecards & benchmarks

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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.

Reason #9

Advanced Proctoring

Learn more

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About the Java & SQL Assessment Test

Why you should use Pre-employment Java & SQL Online Test?

The Java & SQL -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:

Forståelse af Java Basics
Dygtige til objektorienterede programmeringskoncepter
Evne til at håndtere undtagelser effektivt
Stærk viden om SQL Basics
Ekspertise inden for databasedesign
Færdighed i forespørgsel og manipulering af data
Dygtige i Java -kodning
Erfaring med designmønstre
Dygtige til multithreading og samtidighed
Kendskab til servlets og JSP

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 Java & SQL Online Test?

java basics
java basics dækker de grundlæggende koncepter og syntaks for Java -programmeringssproget. Dette inkluderer emner såsom variabler, datatyper, kontrolstrukturer og grundlæggende input/output -operationer. Det er vigtigt at måle denne færdighed i testen som et stærkt fundament i Java Basics er nødvendig for effektiv programmering i Java.
objektorienteret programmering
objektorienteret programmering (OOP) er et programmeringsparadigme, der muliggør organisering og styring af kode gennem brug af genstande, klasser og arv. Denne dygtighed evaluerer den enkeltes evne til at anvende OOP -principper, herunder indkapsling, polymorfisme og abstraktion, i Java. Måling af denne færdighed er afgørende, da OOP bruges i vid udstrækning i Java -udvikling og fremmer modulær og genanvendelig kode.
undtagelser
Undtagelser henviser til håndtering af uforudsete begivenheder, der kan forstyrre den normale strøm af Programudførelse. Denne færdighed involverer at forstå forskellige typer undtagelser, såsom kontrollerede og ukontrollerede undtagelser, og ved hjælp af try-catch-blokke til at håndtere dem korrekt. Måling af denne færdighed sikrer, at kandidaten effektivt kan håndtere fejlscenarier og skrive robuste og pålidelige Java -kode.
SQL Basics
SQL Grundlæggende dækker grundlæggende koncepter og syntaks for det strukturerede forespørgselssprog (SQL ). Dette inkluderer emner som oprettelse og manipulering af databaser, definition af tabeller og forespørgselsdata. Det er vigtigt at måle denne færdighed, da SQL er et standardsprog til interaktion med relationelle databaser, og en stærk forståelse af SQL -grundlæggende er afgørende for at arbejde med datalagring og hentning.
databasedesign
Databasedesign involverer at skabe struktur og organisering af et databasesystem. Denne færdighed omfatter design af databaseskemaer, etablering af forhold mellem tabeller og optimering af databasens ydelse. Måling af denne færdighed er vigtig, da en veludviklet database forbedrer dataintegritet, reducerer redundans og forbedrer den samlede systemeffektivitet.
Forespørgsel og manipulering af data
Forespørgsel og manipulering af datafokus på at hente og at have hentet og at hente og at hente og at hente og at hente og at have hentet og hentning og Ændring af data, der er gemt i databaser ved hjælp af SQL. Denne færdighed evaluerer kandidatens evne til at skrive komplekse SQL -forespørgsler, udføre operationer såsom indsatser, opdateringer og sletning og forstå databasetimeringsteknikker. Måling af denne færdighed er afgørende, da den vurderer kandidatens kompetence i at arbejde med data i den virkelige verden og deres evne til effektivt at manipulere og styre det.
java-kodning
java-kodning tester kandidatens evne At skrive korrekt og effektiv Java -kode til at løse specifikke problemer eller implementere den ønskede funktionalitet. Denne færdighed dækker forskellige aspekter, herunder kodestruktur, algoritmisk tænkning og overholdelse af bedste praksis. Måling af denne færdighed er vigtig for at vurdere kandidatens praktiske programmeringsevner og deres færdigheder i implementering af løsninger ved hjælp af Java-programmeringssprog.
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 Java & SQL -test to be based on.
Java -variabler
Java -datatyper
Java Control Flow
Java -operatører
Java Arrays
Java -klasser
Java arv
Java -polymorfisme
Java indkapsling
Java undtagelseshåndtering
SQL -datatyper
Oprettelse af SQL -bord
SQL -forespørgsler
SQL slutter sig til
SQL -aggregeringer
SQL -begrænsninger
SQL -underspil
SQL -indeksering
SQL -visninger
SQL -transaktioner
Database normalisering
Relationsdatabasedesign
Databaseskemaer
Syreegenskaber
Forespørgseloptimering
Enhedsrelationship (ER) diagrammer
Datamodellering
Primære nøgler
Udenlandske nøgler
Databaseindeksering
Databasevisninger
Database udløser
Java -fil I/O
Java undtagelsestyper
Undtagelseshåndtering af bedste praksis
Java try-catch-endelig
Kontrolleret vs ukontrollerede undtagelser
Java brugerdefinerede undtagelser
SQL Indsæt udsagn
SQL -opdateringsopgørelser
SQL Slet udsagn
SQL Select -udsagn
SQL -filtrering
SQL -sortering
SQL Aggregering
SQL Grouping
Java-objektorienteret design
Java arv mod komposition
Java Abstraction
SQL -normalisering
SQL -denormalisering
SQL -indekseringsstrategier
Java -kodningskonventioner
Java -fejlfinding
Java -kodeoptimering
SQL -datamanipulation
SQL Data Definition
SQL -datakontrol

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What roles can I use the Java & SQL Online Test for?

Java -udvikler
Softwareingeniør Java
Backend Java -udvikler
SQL -udvikler
Java Full Stack Developer
Java Application Developer
SQL -databaseudvikler

How is the Java & SQL 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

Demonstreret ekspertise inden for performance -tuning
Evne til at optimere SQL -forespørgsler
Erfaring med avancerede databasekoncepter
Dygtige til applikationstest og fejlsøgning
Kendskab til dvale rammer
Stærk forståelse af foråret rammer
Dygtige til afslappende webtjenester
Erfaring med mikroservicesarkitektur
Evne til at udvikle skalerbare og robuste applikationer
Ekspertise i Agile Software Development Practices
Stærk viden om designprincipper og mønstre

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

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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

Se den fulde casestudie

Java & SQL 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.