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C.R.I. Pumps Interview Questions and Answers
Q1. what are Access Controls/modifiers? public vs open?
Access controls/modifiers determine the visibility and accessibility of classes, methods, and properties in object-oriented programming.
public access control allows a class, method, or property to be accessed from anywhere in the code
open access control allows a class to be subclassed outside of the module where it is defined
public is commonly used in Swift for most cases, while open is used when you want to allow subclassing from external modules
Q2. How you use GIT, How to manage conflicts?
I use GIT for version control and manage conflicts by resolving them through communication and collaboration.
Regularly commit changes to keep track of progress
Pull latest changes before making any updates to avoid conflicts
Communicate with team members to resolve conflicts efficiently
Use tools like Git merge or Git rebase to resolve conflicts
Document resolution process for future reference
Q3. Code snippets for optional binding, find error ?
Optional binding in Swift helps to safely unwrap optionals and check for nil values.
Use if let or guard let to safely unwrap optionals and bind the value to a new constant or variable.
Check for nil values before using the unwrapped value to avoid runtime errors.
Example: if let name = optionalName { print(name) }
Example: guard let age = optionalAge else { return }
Q4. What is Weak & Unowned , ARC?
Weak & Unowned references are used in ARC to prevent retain cycles in Swift programming.
Weak references do not increase the retain count of an object, and automatically become nil when the object is deallocated.
Unowned references do not keep a strong reference to the object, and can become a dangling pointer if the object is deallocated.
ARC (Automatic Reference Counting) is a memory management system used in Swift to automatically manage memory for objects.
Q5. What is Autoclosure?
Autoclosure is a feature in Swift that automatically wraps an expression in a closure.
Autoclosure is used to delay evaluation of an expression until it is actually needed.
It is commonly used with functions that take closures as arguments, allowing the caller to pass in a regular value instead of a closure.
Autoclosures are created by adding @autoclosure attribute before the closure's parameter type.
Q6. Protocol vs Closures?
Protocols define a blueprint of methods, properties, and other requirements that a class or struct must adopt. Closures are self-contained blocks of functionality that can be passed around and used in your code.
Protocols define a set of methods, properties, and other requirements that a class or struct must implement.
Closures are self-contained blocks of functionality that can capture and store references to any constants and variables from the context in which they are defin...read more
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