ADTECH Systems Senior Android Developer Interview Questions and Answers

Q1. What is retain , weak, strong, atomic etc in Objective C
Ans. 
Retain, weak, strong, atomic are property attributes in Objective-C for memory management and thread safety.
• Retain: Increases the reference count of an object.

• Weak: Does not increase the reference count, used to avoid retain cycles.

• Strong: Increases the reference count and keeps the object in memory until all references are removed.

• Atomic: Guarantees that the value is always fully retrieved or set in a multi-threaded e
Answered by AI
Add your answer
Q2. ARC in Objective C
Ans. 
ARC (Automatic Reference Counting) is a memory management feature in Objective-C that automatically manages memory for objects.
• ARC automatically inserts retain, release, and autorelease calls at compile time to manage memory.

• It helps prevent memory leaks and makes memory management easier for developers.

• Example: 'NSString *name = [[NSString alloc] initWithString:@"John"];' - ARC will automatically handle memory managem
Answered by AI
Add your answer

Simple leetcode easy problems like- merge two sorted array with duplicate numbers,valid parentheses, two sum,three sum.

Q1. Hr round simple behaviour questions. Tell me something about you self.
Add your answer
Q2. Salary negotiation there.etc
Add your answer