Objective Questions in >= Swift2.2 @iPhone - Set F

  Q.51: What will be the output

           class Demo {

           var count = 5  

           func increase(by num : Int) {

           count += num

            }    }

let ob = Demo()

ob.increase(by: 5)

print(ob.count) 

A.      11

B.      5

C.      10

D.      None

Q.52: Which keyword is used to refer the current instance           of the Class

                A. This

                B. own

                C. auto

                D. self

Q.53: Which is the proper syntax in swift for Inheritance

                A. class SubClass : SuperClass {    }

                B. class SubClass : public SuperClass {    }

                C. class SubClass , SuperClass {    }

                D. class SubClass , public  SuperClass {    }

Q.54: Which keyword is used to prevent overriding in                     swift

                A. self

                B. final

                C. stop

                D. auto

Q.55: What will be the output

          struct Demo {

          var num: Double

          init() {

                     num = 35.56

                   }

        }

var sob = Demo()

print("The default value is  \(sob.num)")

A.      35

B.      35.56

C.      Compile Time Error

D.      None of the abovge

Q.56: What will be the output

          let data: UInt8 = 0b00001111

          let invert = ~data

          print(invert)

A.      Compile Time Error

B.      128

C.      64

D.      240

Q.57: What will be the output

          let num1: UInt8 = 0b11111100

          let num2: UInt8  = 0b00111111

          let output = num1 & num2 

          print(output)

A.      32

B.      16

C.      60

D.      8

Q.58:  What will be the output

           let num1: UInt8 = 0b11111100

           let num2: UInt8  = 0b00111111

           let output = num1 & num2 

           print(output)

A.      128

B.      64

C.      256

D.      255

Q.59:  What will be the output

           let num1: UInt8 = 0b11111100

           let num2: UInt8  = 0b00111111

           let output = num1 ^ num2 

          print(output)

A.      128

B.      255

C.      195

D.      99

Q.60: What will be the output

          let bits: UInt8 = 4  

          let output = bits << 1            

          print(output)

A.      2

B.      4

C.      8

D.      16

Answers     C    D     A    B    B     D     C     D     C     C