Session 5

Is there any Data loss while upcasting conversion.?

• Yes

• No

Answer explanation

‌1. Converting lower data type into the higher one

2. This is safe process. Hence, no chance to lose data.

What is the name of parent to child conversion.?

• Downcasting

• Upcasting

Which operator is used to check the type?

• is

• as

• as?

• as!

What will return while using the safe operator(as?) if the casting is failed.?

• 1

• value of the variable

• 0

• null/nil

Which keyword is used for force casting?

• as!

• as?

• as

• is!

‌What is the output of the program:

val integerValue: Int = 1234

val str: String = integerValue as String

println(str)

• Throw an Exception

• 1234

• 0

• null/nil

Which symbol is used to annotate?

• ?

• ;

• :

• !

Why can typecasting be dangerous?

• Some conversions are not defined, such as char to int.

• You might permanently change the value of the variable.

• You might temporarily lose part of the data - such as truncating a float when typecasting to an int.

• There are no dangers.

Which conversion is not possible?

• int to float

• float to int

• char to float

• All are possible

What is Type Casting?

• Converting one function into another

• Converting operator type to another type

• Converting one datatype into another

• None of them