iOS Developer Intern Interview Questions and Answers

Hashmaps and hashsets are data structures for storing key-value pairs and unique elements, respectively.

• Hashmap: Stores key-value pairs, allowing fast retrieval by key. Example: `let map = ['a': 1, 'b': 2]`.

• Hashset: Stores unique elements without duplicates. Example: `let set: Set = [1, 2, 3]`.

• Hashmaps use a hash function to compute an index for storing values, ensuring O(1) average time complexity for lookups.

• Hashsets also use hashing to ensure uniqueness, making operations ...read more

Basic programming concepts like loops, if-else statements, and functions are essential for iOS development.

• Loops are used to iterate over a collection of items, such as an array or dictionary.

• If-else statements are used to make decisions based on certain conditions.

• Functions are reusable blocks of code that perform a specific task.

• Example: Using a for loop to iterate over an array of numbers and checking if each number is even or odd using if-else statements.

Application development life cycle involves planning, designing, coding, testing, and deployment.

• Planning: Define project scope, requirements, and timeline.

• Designing: Create wireframes, mockups, and user interface.

• Coding: Write code based on design and requirements.

• Testing: Test the application for bugs and performance issues.

• Deployment: Release the application to users and maintain it.

• Iterative process: Often involves multiple cycles of development and testing.

API methods allow communication between client and server, enabling data exchange and functionality in applications.

• API methods are endpoints that define how clients can interact with a server.

• Common HTTP methods include GET (retrieve data), POST (send data), PUT (update data), and DELETE (remove data).

• For example, a GET request to '/users' might return a list of users from a database.

• POST requests often include a payload, such as JSON data, to create new resources.

• APIs can r...read more