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About the test:

The Backend Engineer Online Test uses scenario-based MCQs to evaluate candidates on their knowledge of backend development, which involves designing and implementing server-side logic, databases, and APIs to support web and mobile applications. The test assesses candidates' proficiency in designing scalable and robust architectures, writing efficient code in languages such as Java, Python, or Ruby, building and integrating with databases, implementing RESTful APIs, and debugging and optimizing server-side code.

Covered skills:

  • REST APIs
  • Coding
  • Web Fundamentals
  • Databases
See all covered skills

9 reasons why
9 reasons why

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



Reason #1

Tests for on-the-job skills

バックエンドエンジニアテストは、採用担当者と雇用マネージャーが履歴書のプールから資格のある候補者を特定するのに役立ち、客観的な雇用決定を下すのに役立ちます。それは、あまりにも多くの候補者へのインタビューの管理オーバーヘッドを減らし、資格のない候補者を除外することで時間を節約します。

ADAFACEバックエンドエンジニアオンラインテスト画面典型的なスキルリクルーターの候補者は、バックエンドエンジニアの役割を探します。

-PHP、Python、Ruby、Java、.Net、JavaScript、およびその他のプログラミング言語の知識

  • HTMLとCSSの広範な理解
  • Nginx、Apache、J2EEなどのWebサーバーテクノロジーの知識
  • OOPおよびソフトウェア設計の概念に関する詳細な知識
    • データベース管理システムとNOSQLデータベースの理解
    • Linux/Unixの知識
    • Perl、Shell Scriptingなどのスクリプト言語の理解
    • サスとラスの実用的な知識

この評価から生成された洞察は、採用担当者と雇用マネージャーがバックエンドエンジニアの役割に最適な候補者を特定するために使用できます。アンチチート機能を使用すると、オンラインで評価を実施することに慣れることができます。バックエンドエンジニアのオンラインテストは、リクルーターがどの候補者が仕事でうまくやるスキルを持っているかを特定するのを支援するのに理想的です。

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 Backend Engineer Test will be non-googleable.

🧐 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

Medium

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.

Medium

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
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

Longest Road
logic
hashmaps
Solve
A startup company E-Motors is building driverless automated cars. The car contains a sensor that checks the road quality for the next N meters to decide the optimal speed at which the cars should move. We are given recorded data by the sensor in the form of an array, where each element of the array is the rating given to 1 meter of the road in sequence. 

The rating given by the sensor is from 1 to 100, where 100 represents the road with the best condition, and any rating above 60 is optimal. Find the longest stretch of road in meters that is categorized as optimal by the sensor.

The input is an array of "strings" which needs to be converted from string to integer/number inside the function.

Medium

Visitors Count
Strings
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

Medium

Fibonacci codes
Time Complexity
Pseudo Code
2 mins
Technical Aptitude
Solve

Medium

Palindrome Test cases
Strings
2 mins
Technical Aptitude
Solve

Medium

Rewards Activities Order
Database Connection
3 mins
Technical Aptitude
Solve

Easy

Registration Queue
Logic
30 mins
Coding
Solve

Medium

Longest Road
logic
hashmaps
25 mins
Coding
Solve

Medium

Visitors Count
Strings
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
Medium2 mins
Solve
Palindrome Test cases
Strings
Technical Aptitude
Medium2 mins
Solve
Rewards Activities Order
Database Connection
Technical Aptitude
Medium3 mins
Solve
Registration Queue
Logic
Coding
Easy30 minsSolve
Longest Road
logic
hashmaps
Coding
Medium25 minsSolve
Visitors Count
Strings
Coding
Medium30 minsSolve
Reason #4

1200+ customers in 75 countries

customers in 75 countries
Brandon

Adafaceを使用すると、初期スクリーニングプロセスを75%以上最適化することができ、採用マネージャーとタレント獲得チームの両方にとって貴重な時間を解放しました!


Brandon Lee, 人々の頭, 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.

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 & 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


バックエンドエンジニアの役割について

バックエンドは、コンピューターアプリケーションまたはプログラムのコードのコンポーネントを機能させることを指しますが、ユーザーは表示できません。ほとんどのデータと運用上の構文は、コンピューターシステムのバックエンドで保持され、アクセスされます。

バックエンドエンジニアは、多くの場合、ソフトウェアプログラムの構造の作成を担当しています。主に、フロントエンド開発者とUXデザイナーが使用するビジネスロジック、サーバースクリプト、アプリケーションプログラミングインターフェイス(API)の構築について責任を負います。

####典型的なバックエンドエンジニアの責任は次のとおりです。

-C ++、Ruby、Scala、およびJavaで高速で応答性があり、スケーラブルなソフトウェアを作成します

  • エンドユーザーのニーズを理解するために、製品および設計チームと協力する
  • 顧客プロジェクトのためのサービスとシステムアーキテクチャの作成と実装
  • 機能を超えたチームと協力して、新しいアイデアを生成します
  • コードレビュー、単体テスト、自動化を完了することにより、コードの品質を維持するのを支援します
  • データストレージシステムを作成および展開します
  • 効果的なフロントエンド統合を確保するためにバックエンドのユーザビリティを設定する
  • バックエンドソフトウェアエンジニアリングのベストプラクティスを確立します

What roles can I use the Backend Engineer Test for?

  • Backend Engineer
  • Software Engineer
  • Full Stack Engineer

What topics are covered in the Backend Engineer Online Test?

キャップ定理

表現状態転送

休み
NOSQLデータベース
SQLインジェクション
継続的インテグレーション
mongodb
機能テスト
受け入れ試験
GOプログラム

相互運用性、再利用可能性、ゆるい結合

ウェブサービス
コンテナ化
マイクロサービスアーキテクチャ
性能試験

高可用性

原子性、一貫性、分離、耐久性

酸性特性
スティッキーセッションロードバランシング
セッションアフィニティ

繰り返さないでください

乾燥した原則

複製は悪です

死の原則
クラスター化されていないインデックス
継続的インテグレーション
継続的な配達
継続的な展開
モノリシック建築

サービス指向アーキテクチャー

SOAアーキテクチャ
APIゲートウェイパターン
SSL/TLS
Bツリーインデックス
ベースプロパティ
分散トランザクション
スパイクテスト
12因子アプリの原則
安らかなAPIデザイン
Singapore government logo

採用マネージャーは、パネルのインタビュー中に尋ねた技術的な質問を通して、どの候補者がより良いスコアを持っているかを知ることができ、得点しなかった人と差別化することができたと感じました。彼らです 非常に満足しています 候補者の品質は、ADAFACEスクリーニングで最終候補になりました。


85%
スクリーニング時間の短縮

FAQs

複数のスキルを1つのカスタム評価に組み合わせることはできますか?

そのとおり。カスタム評価は、職務内容に基づいて設定され、指定したすべての必須スキルに関する質問が含まれます。

アンチチートまたは監督の機能はありますか?

次のアンチチート機能があります。

  • グーグル不可能な質問
  • IP監督
  • Webの提案
  • ウェブカメラの監督
  • 盗作の検出
  • 安全なブラウザ

[プロクチャリング機能](https://www.adaface.com/proctoring)の詳細をご覧ください。

テストスコアを解釈するにはどうすればよいですか?

留意すべき主なことは、評価が選択ツールではなく排除ツールであることです。スキル評価が最適化され、技術的にその役割の資格がない候補者を排除するのに役立ちます。これは、役割の最良の候補者を見つけるのに役立つために最適化されていません。したがって、評価を使用する理想的な方法は、しきい値スコア(通常は55%、ベンチマークを支援します)を決定し、インタビューの次のラウンドのしきい値を超えてスコアを上回るすべての候補者を招待することです。

このテストを使用できますか?

各ADAFACE評価は、職務記述書/理想的な候補者のペルソナにカスタマイズされます(当社の主題の専門家は、10000以上の質問のライブラリからあなたの評価に適切な質問を選択します)。この評価は、あらゆる経験レベルでカスタマイズできます。

すべての候補者は同じ質問を受け取りますか?

私は候補者です。練習テストを試すことはできますか?

いいえ。残念ながら、現時点では練習テストをサポートしていません。ただし、[サンプルの質問](https://www.adaface.com/questions)を使用するには、練習できます。

このテストを使用するコストはいくらですか?

無料トライアルを受けることはできますか?

私はちょうど有料プランに移りました。カスタム評価をリクエストするにはどうすればよいですか?

customers across world
Join 1200+ companies in 75+ countries.
今日、最も候補者のフレンドリーなスキル評価ツールをお試しください。
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40 min tests.
No trick questions.
Accurate shortlisting.
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