Functions

Question 1

Functions

When overriding a method with default parameter values, the default parameter values must be ___ from the signature.

Answer 1

omitted

Question 2

Functions

If a default parameter precedes a parameter with no default value, the default value can only be used by calling the function with ___ ___.

Answer 2

named arguments

Question 3

Functions

If the last argument after default parameters is a lambda, you can pass it either as a named argument or ___ the ___.

Answer 3

outside; parenthesis

Question 4

Functions

What is one important way calling a function with named arguments is helpful?

Answer 4

disambiguating the meaning of the parameters

Question 5

Functions

You can pass a variable number of arguments (vararg) with names using the ___ operator.

Answer 5

spread

Question 6

Functions

When a function returns a single expression, the curly braces can be omitted and the body is specified after a ___ symbol.

Answer 6

equals (=)

Question 7

Functions

A parameter of a function (normally the last one) may be marked with ___ modifier, allowing a variable number of arguments to be passed to the function.

Answer 7

vararg

Question 8

Functions

When we call a vararg-function, we can pass arguments one-by-one, or, if we already have an array and want to pass its contents to the function, we use the ___ operator (prefix the array with * ).

Answer 8

spread

Question 9

Functions

Functions marked with the ___ keyword can also be called without the dot and parenthesis for the call.

Answer 9

infix

Question 10

Functions

Infix functions must satisfy the following requirements:

Answer 10

They must be member functions or extension functions;

They must have a single parameter;

The parameter must not accept variable number of arguments and must have no default value

Question 11

Functions

Kotlin supports local functions, i.e. a function inside another function. Local functions can access ___ variables of ___ functions.

Answer 11

local; outer

Question 12

Functions

Kotlin supports a style of functional programming known as ___ ___. This allows some algorithms that would normally be written using loops to instead be written using a recursive function, but without the risk of stack overflow.

Answer 12

tail recursion

Question 13

Functions

When a function is marked with the ___ modifier and meets the required form, the compiler optimizes out the recursion, leaving behind a fast and efficient loop based version instead.

Answer 13

tailrec

Question 14

Functions

To be eligible for the tailrec modifier, a function must call itself as the ___ operation it performs.

Answer 14

last