Einfochips Senior IOS Developer Interview Questions and Answers

Q1. Structs vs Classes
Ans. 
Structs are value types and passed by value, while classes are reference types and passed by reference.
• Structs are used for small, simple data types like coordinates or colors.

• Classes are used for more complex data types that require inheritance or reference semantics.

• Structs are copied when passed around, while classes are passed by reference.

• Structs are stack allocated, while classes are heap allocated.
Answered by AI
Add your answer
Q2. Discussion about design patterns
Add your answer
Q3. OOPS discussion
Add your answer
Q4. Concurrency discussion
Add your answer

Q1. Atomic vs Non-Atomic
Ans. 
Atomic means thread-safe access, non-atomic is not thread-safe
• Atomic ensures that a property is always fully set or retrieved, while non-atomic does not guarantee this

• Atomic properties are slower due to the overhead of ensuring thread safety

• Non-atomic properties are faster but can lead to data corruption in a multi-threaded environment
Answered by AI
Add your answer
Q2. SSL Pinning with different ways
Ans. 
SSL pinning is a security measure to prevent man-in-the-middle attacks by associating a specific SSL certificate with a particular app.
• Implementing SSL pinning using public key

• Implementing SSL pinning using certificate

• Implementing SSL pinning using hash of certificate
Answered by AI
Add your answer

Q1. Questions from past projects
Add your answer
Q2. Questions from Process
Add your answer

Q1. Difference between deep and shallow copy
Ans. 
Deep copy creates a new object and recursively copies all nested objects, while shallow copy creates a new object and copies the references to nested objects.
• Deep copy duplicates all levels of the object hierarchy, ensuring that changes in the copied object do not affect the original object.

• Shallow copy only duplicates the top-level object, so changes in the copied object may affect the original object.

• Deep copy is mor...read more
Answered by AI
Add your answer
Q2. Ways to set values in form groups
Ans. 
Ways to set values in form groups
• Use setValue() method to set values in form groups

• Use patchValue() method to set values in form groups

• Use reset() method to set values in form groups
Answered by AI
Add your answer
Q3. How to add dynamic component in view
Ans. 
To add a dynamic component in a view, use a framework or library that supports dynamic rendering and component creation.
• Use a framework like React or Angular that allows for dynamic component creation

• Create a component factory or use a component resolver to dynamically create and render components

• Pass data or props to the dynamic component to customize its behavior

• Update the view or component tree to include the dynami...read more
Answered by AI
Add your answer

Q1. All Concurrent Utility Classes and their uses.
Ans. 
Concurrent Utility Classes provide support for concurrent programming in Java.
• ConcurrentHashMap: Thread-safe implementation of Map interface.

• CopyOnWriteArrayList: Thread-safe implementation of List interface.

• CountDownLatch: Synchronization aid that allows one or more threads to wait until a set of operations being performed in other threads completes.

• Semaphore: Controls the number of threads that can access a shared re...read more
Answered by AI
Add your answer
Q2. Basic SQL queries, mostly from Joins, Grouping
Add your answer
Q3. Core Java, Java 8
Add your answer

Q1. Internal working of hashmap
Ans. 
HashMap is a data structure that stores key-value pairs and uses hashing to quickly retrieve values based on keys.
• HashMap internally uses an array of linked lists to store key-value pairs.

• When a key-value pair is added, the key is hashed to determine the index in the array where it will be stored.

• If multiple keys hash to the same index, a linked list is used to handle collisions.

• HashMap uses the hashCode() method of ke...read more
Answered by AI
Add your answer
Q2. What are the feature of jdk 8
Ans. 
JDK 8 features include lambda expressions, functional interfaces, streams, and default methods.
• Lambda expressions allow you to write code in a more concise and readable way.

• Functional interfaces enable the use of lambda expressions.

• Streams provide a way to work with sequences of elements efficiently.

• Default methods allow interfaces to have concrete methods.

• Date and Time API improvements.
Answered by AI
Add your answer

Live coding on my technology

Q1. Oops, solid principles, mvc vs mvvm vs mvp
Add your answer

Q1. About ur self and recent achievements
Add your answer