Chapter 20 Review

Question 1

T or F

A generic and non-generic method can have the same method name

Answer 1

True. A generic method can be overloaded by a non-generic method of the same name.

Question 2

All generic method declarations have a type-parameter section that immediately precedes the method name

Answer 2

False. The method type-parameter precedes the return type

Question 3

A generic method can be declared only once in the type-parameter section but can appear more than once in the method’s parameter list.

Answer 3

True

Question 4

Type-parameter names among different generic methods must be unique.

Answer 4

False.

Question 5

The scope of a generic class’s type parameter is the entire class except its static members

Answer 5

True

Question 6

What do generic methods and classes do?

Answer 6

Generics allow you to specify a single method or class to perform a function or related function on different types of data

Question 7

A type-parameter is delimited by what characters?

Answer 7

<> angle brackets

Question 8

A generic method’s ______ can be used to specify the method’s argument types, to specify the method’s return type and to declare variables within the method.

Answer 8

type parameter

Question 9

If a generic class in instantiated and no type is specified. What default type is used?

Answer 9

Raw Type

Question 10

What comes before the type-parameter in a generic class definition?

Answer 10

class name

Question 11

The syntax _____________ specifies that the upper bound of a wildcard is type T?

Answer 11

? extends T

Question 12

Upperbound

Answer 12

The upper bound class in a hierarchy defines the super class for which all classes within the domain are subs

Question 13

Lowerbound

Answer 13

The lower bound class in a hierarchy defines the sub class for which all classes in the domain are a super-class.

Question 14

Wildcard

Answer 14

A wildcard “?” is used in conjunction with the keyword ‘super’ or ‘extends’ to define an upper or lower bound domain.