KETERAMPILAN PEMROGRAMAN

Binary search trees test for hiring

See how candidates turn a binary search tree problem into working code.

35 menit
1 task
Intermediate
Coding tasks
Questions in Inggris
Desktop only

Use this test free See the question formats

Jawaban singkat

The Coding: Binary Search Trees test is one browser-based programming task for intermediate software engineers, backend developers and data professionals who write code with ordered data structures. It measures whether candidates can build, search, change and walk binary search trees, with their solution run against hidden test cases.

Hal yang diukur

Writing correct, working code that builds, searches, changes and walks binary search trees.

Binary search tree programming

Candidates write code to build or read a tree, then search, insert, remove, walk, or check it to produce the requested output.

Question formats

Coding tasks

The candidate: Writes or fixes code in an editor and runs it against examples.

You see: Working code, checked against hidden test cases, not just knowledge of syntax.

1 task in 35 minutes.

Roles this test fits

Software engineers and backend developers, and data engineers, data scientists or architects who write code that relies on ordered data structures.

What this task can show

Working tree operations
The task shows how a candidate implements operations such as searching, inserting, removing or walking a binary search tree, rather than only describing them.
The whole path from input to tree
The candidate first builds or reads the tree from the input, then works on it, so the hidden cases check the tree handling as well as the operation asked for.
No library tree class to lean on
The task uses integer keys and never depends on one language's built-in tree class, so candidates in each of the six languages write the same tree logic.
A modest input scope
Input sizes and tree heights are kept modest, so a correct solution passes in every supported language without special tuning.

What you get for each candidate

Example report (fictional data)Coding: Binary Search Trees

78%Percentile 62. Benchmark: HireValid candidates, n = 996

Binary search tree programming78%

Integrity ScoreTingkat keyakinan tinggi

Stayed on the test tab throughout
No pasted answers
Answered at a steady pace

Scores, profiles and integrity signals are evidence for you to review alongside an interview, never an automatic decision.

Use this test free

Integrity signals and hidden cases

The code runs against hidden test cases on HireValid’s servers; the cases and solutions do not reach the browser. Pastes into the editor are recorded. Each candidate receives a different set drawn from large question pools, and the browser presents one question at a time. Timing runs on the server, so reloading restores the same question with only the remaining time. HireValid can summarize signals such as time away from the test tab and pastes into answers in an Integrity Score and evidence timeline for you to review. It does not decide on its own. With candidate consent, you can add webcam photos at random moments. Read how HireValid builds tests and review the pre-employment testing guide when setting up your process.

Cara kami mencegah kecurangan dengan AI · Integrity signals

Use the score as one piece of evidence

The score is the share of hidden test cases the solution passes on this single task, so it reflects one problem rather than a broad sample. Reliability is provisional and will be reported once 200 candidates have completed it. Review the code and task evidence alongside a relevant work sample and a structured interview; do not use the score alone to make a hiring decision. For a broader view of role fit, compare it with the Software Engineer test or the Algorithms for Software Engineering test.

Structured interview prompts

How would you change your solution if the requested operation changed from searching to removing a key?
Listen for a concrete explanation of how the candidate would adapt their code and check the resulting tree and output.
What input case did you use to check your tree operations, and what did it reveal?
Look for a specific test case, the behavior it exercised, and how the candidate used the result to assess the code.
Walk me through how your code turns the given input into the requested output.
Listen for a clear account of the code's steps, including how it builds or reads the tree and performs the requested operation.

Understand scoring and benchmarks

Fairness and accommodations

Tasks are stated in plain US English with small worked examples, use only integer keys and neutral settings, and do not depend on any one language's library tree class, so candidates in any of the six languages solve the same problem. Input sizes and tree heights are kept modest so that a correct solution passes in every language without special tuning.

You can give any candidate extra time as an accommodation. Results are evidence for a person to review, never an automatic decision.

Provisional: the score is the share of hidden test cases the solution passes on a single task, so it reflects one problem rather than a broad sample. Reliability is reported once 200 candidates have completed it.

Baca pendekatan kami terhadap keadilan

Test details

One programming task built around binary search trees, solved in a browser code editor and run against hidden test cases. The candidate builds or reads a tree from the input, then searches, inserts, removes, walks or checks it to produce the asked-for output. Candidates may write their solution in Python, JavaScript, Java, C#, C++ or Go.

Questions are in English.
Aids allowed: Scratch paper.
1 practice task, 10 minutes, before the timed test.
Taken on a desktop or laptop computer.

Python, JavaScript, Java, C#, C++, Go are trademarks of their owners. HireValid is not affiliated with or endorsed by them.

Pertanyaan yang sering diajukan

How does the Coding: Binary Search Trees test stay fair across programming languages?+

The task is stated in plain US English with small worked examples, uses integer keys and neutral settings, and does not depend on any one language's library tree class. Candidates in any of the six languages solve the same problem, and modest input sizes and tree heights let a correct solution pass in each one.

What can candidates use during the Coding: Binary Search Trees test?+

Candidates may use scratch paper, which helps when sketching a tree before an insert or a removal. The 35-minute test needs a computer and has one coding task in a browser code editor.

Is there a practice set for the Coding: Binary Search Trees test?+

Yes. The practice set has one question and takes 10 minutes. It lets candidates get familiar with the editor and the format before the scored task, which asks for code that works with binary search trees and is run against hidden test cases.

Which candidates is the Coding: Binary Search Trees test designed for?+

It is an intermediate test for software engineers and backend developers, as well as data engineers, data scientists and architects who write code that relies on ordered data structures. Use it when that kind of coding is part of the role, and read the code alongside other hiring evidence.