Codility-style coding test prep
Codility practice for correctness and performance.
Work through public-catalog problems with explicit Codility evidence. Use constraints to plan the algorithm, then validate both behavior and scalability.
Loading Codility practice problems
Reading the highest-frequency public catalog matches.Codility filter
Start from explicitly supported platform evidence.Constraints first
Use input bounds to select a viable algorithm.Run your code
Check behavior in the FastPrep execution workspace.Scale check
Reason about time and space before finalizing.
Treat performance as part of correctness.
A solution is not finished when it passes one example. Build the habit of covering corner cases and choosing an approach that remains practical at the stated input limits.
- 01
Define the full behavior
Translate the prompt into invariants and list empty, minimal, repeated, and boundary inputs before implementation.
- 02
Prove the complexity
Estimate time and space from the maximum constraints, then reject approaches that cannot scale to those limits.
- 03
Validate small and large cases
Use readable examples for logic and custom cases for boundaries, degenerate inputs, and scale-sensitive behavior.
Turn the score goal into a preparation plan.
Review public company context, schedule focused correctness-and-performance sessions, and keep the actual assessment deadline visible in your application tracker.
What candidates should know.
What the filtered catalog can support, how to practice responsibly, and why constraints and edge cases matter.
01Is FastPrep affiliated with Codility?
No. FastPrep is an independent interview preparation and application tracking product. This page previews public catalog entries with explicit supporting Codility evidence.
02Does FastPrep provide official or private Codility tasks?
No. FastPrep does not provide official, private, leaked, or proprietary Codility tasks. The catalog is used for independent practice of transferable problem-solving skills.
03How are Codility practice problems selected?
FastPrep previews up to 20 public assessment problems with explicit Codility evidence, ordered by repeated public catalog sightings. The filtered problem bank shows the complete available set.
04What should a Codility-style practice session emphasize?
Start from the constraints, identify corner cases, state the expected time and space complexity, implement, and test both small examples and boundary inputs. Follow the rules in your actual assessment invitation.
05How can I see every Codility practice problem?
Select Show all problems above or below the preview table. The full problem list opens with the Codility filter already applied.
Your next useful action
Make one solution hold up.
Choose a problem, cover the boundaries, and verify the complexity before moving on.
View practice problems