Einfochips Senior IOS Developer Interview Questions and Answers

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
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Q2. SSL Pinning with different ways
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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
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Q1. 1.Explain delegate and protocol 2.Explain Mvc 3.Explain arc
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Answers to questions related to IOS development concepts.
• Delegate and protocol are used for communication between objects in IOS. Delegate is a design pattern that allows one object to send messages to another object when a specific event occurs. Protocol is a set of methods that a class can implement to provide a specific behavior.

• MVC is a design pattern used in IOS development. It separates the application into three...read more
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Q2. Explain mvc design pattern
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MVC is a design pattern that separates an application into three interconnected components: Model, View, and Controller.
• Model represents the data and business logic of the application

• View is responsible for displaying the data to the user

• Controller acts as an intermediary between the Model and View, handling user input and updating the Model and View accordingly

• MVC promotes separation of concerns and modularity, making...read more
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Q1. Questions from past projects
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Q2. Questions from Process
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Q1. Previous projects, Basic React Questions and Node js questions.
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Fetching data from api, DSA question (Queue implementation)

Q1. Salary and package discussion
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Q1. Managerial round - just project explanation
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Q1. Java Multithreading
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Q2. Core java using java 8 features
Ans. 
Core Java features in Java 8 include lambda expressions, functional interfaces, streams, and default methods.
• Lambda expressions allow you to pass functionality as an argument to a method.

• Functional interfaces have a single abstract method and can be used with lambda expressions.

• Streams provide a way to process collections of objects in a functional style.

• Default methods allow interfaces to have methods with implementat...read more
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Q3. Oops concepts in java
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Oops concepts in java refer to Object-Oriented Programming principles like Inheritance, Encapsulation, Polymorphism, and Abstraction.
• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability of a method to do different things based on the object it is acting upon.

• Abstraction: Hiding the imp...read more
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Q4. Spring MVC and Batch
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Q5. Basic SQL queries, joins and all
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Q1. Basic Questions on SQL and SSIS
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Q1. Advanced question on SQL and SSIS
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Q1. Salary negotiation
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