Status: Working as SSE in a Multinational Product Based company.
YOE: 8.5 years In IOS 2.5 years
Round 1: IOS - 90 Minutes
- Schedule for 90 minutes but lasted for 60 minutes around below question he asked
- Why swift over objective c?
- Why Swift is called protocol oriented language?
- Output for the below code?
DispatchQueue.main.async {
print("A")
DispatchQueue.main.sync {
print("B")
}
print("C")
}
Answer:
Output is: A because to print C it will wait main.sync should come out it will create deadlock in real time it will crash but it will give output in playofround as A- Diff b/w String? Vs String! -
- Let name: String = "abc" // Answer: This will compile
Let name: String = nil // Answer: This will not compile
Let name: String? = nil // Answer: This will compile
Let name: String! = nil // Answer: This will compile
- Question releated to ARC
- Need to give answer it will compile or not if yes then why and if no then why?
- Will you be able to make an object of the class?
Struct Person {
let name: String
let father: Person
}
class Person {
let name: String
let father: Person
init(name: String, person: Person) {
self.name = name
self.person = person
}
}
Answer:
Struct will not complie and Class will complie you can create object of Class because of Referance type.Let’s say on a VC there are many UI elements?
Task is to design a function which will return all the UILabels on that VC?
Main View
- V, I, L, L, T, V, I
- V, , L, L, I, T
-V
- V
-V
-L
-I
-V
-L
-T
Answer:
extension UIView {
func findLabel(inout output: [ULabel]){
for innerView in self.subviews {
If innerView as UIView {
output.append(contentsOf: innerView.findLabel())
} else if innerView as UILabel {
output.append(innerView)
}
}
return output
}
}
view.findLabel(&[])Comments (3)