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3,617 lead mobile developer interview questions shared by candidates

Al tocar un botón con un emoji, deben generarse copias del emoji que flotan hacia arriba como globos. Si el botón se mantiene presionado, los emojis deben seguir apareciendo continuamente hasta que se suelte el dedo.
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Mobile Software Engineer II

Interviewed at Pinterest

3.6★
May 28, 2025

Al tocar un botón con un emoji, deben generarse copias del emoji que flotan hacia arriba como globos. Si el botón se mantiene presionado, los emojis deben seguir apareciendo continuamente hasta que se suelte el dedo.

Dado un arreglo de objetos, cada uno con un id y una propiedad height, distribuirlos en columnas simulando el comportamiento del grid de Pinterest, de forma que los objetos se posicionen para balancear la altura de las columnas.
avatar

Mobile Software Engineer II

Interviewed at Pinterest

3.6★
May 28, 2025

Dado un arreglo de objetos, cada uno con un id y una propiedad height, distribuirlos en columnas simulando el comportamiento del grid de Pinterest, de forma que los objetos se posicionen para balancear la altura de las columnas.

MID POSITION!!!! ya me imagino la de Sr. 😂 Pythagorean Triples A node is considered "special" if its distances to three specific nodes x, y, and z, when sorted in ascending order, form a Pythagorean triple (a, b, c) where at + b2 = c. tree_nodes = 10 tree_edges = 9 tree_from = [0, 0, 1, 1, 3, 3, 5, 7, 8] Git Commits You are working with a Git-based version control system. Each commit in a repository has a unique integer ID representing its timestamp, and the list of commit IDs is given in ascending order. how many consecutive commits can be temporarily hidden such that the remaining visible commits still allow someone to deduce which commits were hidden uniquely. You are allowed to hide a contiguous block of consecutive commits. Implement a function to maximize the number of commits hidden while ensuring the surrounding commit history clearly defines the hidden range.
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MID Mobile Applications Developer

Interviewed at ITJ

4.3★
Jul 3, 2025

MID POSITION!!!! ya me imagino la de Sr. 😂 Pythagorean Triples A node is considered "special" if its distances to three specific nodes x, y, and z, when sorted in ascending order, form a Pythagorean triple (a, b, c) where at + b2 = c. tree_nodes = 10 tree_edges = 9 tree_from = [0, 0, 1, 1, 3, 3, 5, 7, 8] Git Commits You are working with a Git-based version control system. Each commit in a repository has a unique integer ID representing its timestamp, and the list of commit IDs is given in ascending order. how many consecutive commits can be temporarily hidden such that the remaining visible commits still allow someone to deduce which commits were hidden uniquely. You are allowed to hide a contiguous block of consecutive commits. Implement a function to maximize the number of commits hidden while ensuring the surrounding commit history clearly defines the hidden range.

Design and implement a to do list app User stories As a user, I can view items of todo As a user, I can add a todo item by clicking add button then input the todo task As a user, I can check the item in list to mark it as done As a user, I can remove an item in the list Requirement Use whatever tools you feel comfortable with Feel free to google around if you run into any problem Feel free to ask me if you have any question Good architecture design - the app ideally should be designed and implement in good architecture for future changes Covered with testing - the app ideally should be covered by tests
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Senior Mobile Developer

Interviewed at Envoy

2.5★
Apr 28, 2017

Design and implement a to do list app User stories As a user, I can view items of todo As a user, I can add a todo item by clicking add button then input the todo task As a user, I can check the item in list to mark it as done As a user, I can remove an item in the list Requirement Use whatever tools you feel comfortable with Feel free to google around if you run into any problem Feel free to ask me if you have any question Good architecture design - the app ideally should be designed and implement in good architecture for future changes Covered with testing - the app ideally should be covered by tests

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