Python Online Test

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About the test

The Python online test assesses knowledge of programming in the Python language and commonly used parts of the Python Standard Library. This test requires solving live coding problems in Python.

The assessment includes work-sample tasks such as:

  • Working with Python collections and language constructs.
  • Using proper algorithms and data structures to optimize application performance.
  • Serializing to/from JSON to handle web requests.

A good Python developer needs a solid understanding of the Python programming language and knowledge of its data structures and language constructs to write robust and maintainable code.

Sample public questions

20 min

Your company is analyzing malware which targets numerical record files.

The malware uses a sliding window over the array of numbers in a file, and tries to match the following pattern:

Tl, -, -, X, -, -, -, Tr

The entire window is moved so that 'X' passes through all the values and is compared to the numbers at the 'Tl' and 'Tr' locations, which are positioned at a constant offset to 'X'.

The malware has the following rules:

  • If the value at the 'Tl' or 'Tr' position of the pattern is bigger or equal to the value at the 'X’ position, the malware replaces the value at 'X' with 0.
  • If the value at the 'Tl' or 'Tr' offset is out of bounds, then the value at 'X' is only compared to the other existing value.
  • The record is processed in two stages: first, all the positions that should be set to 0 are located, using the original values for comparison. Only after all positions have been identified do they get set to 0.

For example, if the values in a record file are the following:

[1, 2, 0, 5, 0, 2, 4, 3, 3, 3]

The expected values after the malware runs are:

[1, 0, 0, 5, 0, 0, 0, 3, 3, 0]

In this example, both '2's, the '4' and the last '3' were replaced by 0.

Implement the simulate function so that the malware behavior is replicated for further study.

15 min

A user interface contains two types of user input controls: TextInput, which accepts all characters and NumericInput, which accepts only digits.

Implement the class TextInput that contains:

  • Method add(self, character) - adds the given character to the current value
  • Method get_value(self) - returns the current value

Implement the class NumericInput that:

  • Inherits TextInput
  • Overrides the add method so that each non-numeric character is ignored

For example, the following code should output "10":

input = NumericInput()

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55 more premium Python questions

Category Tree, Greeter, Tuple Slice, Kilometer Converter, Count Hobbies, Chain Link, Unique Numbers, Moving Total, Max Sum, Reward Points, Flight Connections, Internal Nodes, Is Alpha, Hobbies, Medical Record, Read First Line, Shipping, Book Authors, Crop Ratio, Username, Friend, Log Parser, Random Playlist, File Format, Special Actions, Cargo Ship, Log Patch, Veterinarian, Document Store, Paper Strip, Car Rental, Chinese Box, Segment, Language Teacher, Numbers To Text, Read Write Execute, Action Stack, Ceramic Store, String Occurrence, Stories, Node, XML Navigation, Driver Exam, Paragraph, Procedural Generator, Worker, Flimsy Ladder, Circuit Simulator, Vectors, Date Transform, Book Sale, Construction Game, Calories Burned, Students, Chemical Machine.

Skills and topics tested

  • Python
  • Dictionary
  • Exceptions
  • Language
  • Strings
  • Tuples
  • Inheritance
  • Method Overriding
  • OOP
  • Conditional Statements
  • Linked List
  • Algorithmic Thinking
  • Set
  • Graphs
  • Lists
  • Tree
  • List Comprehension
  • Iteration
  • Named Tuple
  • Arithmetic
  • Performance Tuning
  • Bug Fixing
  • Integer Division
  • Regex
  • Serialization
  • XML
  • Closures
  • Multithreading
  • Monkey Patching
  • Queue
  • Sorting
  • Data Structures
  • Stack
  • Stream
  • Dynamic Programming
  • Recursion
  • Dynamic Objects
  • Random
  • Memory Management
  • Conditions
  • JSON

For job roles

  • Back-End Developer
  • Python Developer
  • Web Developer

Sample candidate report

What others say

Decorative quote

Simple, straight-forward technical testing

TestDome is simple, provides a reasonable (though not extensive) battery of tests to choose from, and doesn't take the candidate an inordinate amount of time. It also simulates working pressure with the time limits.

Jan Opperman, Grindrod Bank

Product reviews

G2 - Crowd Badge
G2 - High Performer (2022)
Capterra - 4.5 Stars
Capterra - Shortlist (2023)

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