True$/$False $(5)$

$1.$ Any methods that a core method might call are part of the core group.

Answer:

$2.$ You should never suppress compiler warnings.

Answer:

$3.$ When defining the bag class write methods that have simple implementation first to get them out of the way.

Answer:

$4.$ A final class is more secure than one that is not final.

Answer:

$5.$ When testing a method, you only need to check for arguments that lie within the legal range of their corresponding parameter.

Answer:

Multiple Choice $(10)$ Please highlight in YELLOW your entire answer.

$01.$ Which of the following methods is a good candidate for a core method:

a$.$ add$()$

b$.$ clear$()$

c$.$ contains$()$

d$.$ remove$()$

$02.$ Which of the following methods is a good candidate for a core method:

a$.$ add$()$

b$.$ toArray$()$

c$.$ isArrayFull$()$

d$.$ all of the above

$03.$ Which one of the following Java statements allocates an array in the bag constructor causing a compiler warning for an unchecked operation? Assume capacity is an integer.

a$.$ bag $=$ new T$[$capacity$]$;

b$.$ bag $=$ new Object$[$capacity$]$;

c$.$ bag $=$ new $($T$[])$ Object$[$capacity$]$;

d$.$ bag $=($T$[])$ new Object$[$capacity$]$;

$04.$ Which instruction suppresses an unchecked$-$cast warning from the compiler?

a$.$ @SuppressUnchecked$()$

b$.$ @SuppressWarnings$($unchecked$)$

c$.$ @SuppressUncheckedWarnings$()$

d$.$ @Warning$($suppress unchecked$)$

$05.$ What are the consequences of returning a reference to the bag array in the toArray method?

a$.$ the return variable is an alias for the private instance array variable

b$.$ the client will have direct access to the private instance array variable

c$.$ the client could change the contents of the private instance array variable without using the public access methods

d$.$ all of the above

$06.$ Which one of the following is considered a safe and secure programming practice?

a$.$ identifying a group of core methods to implement first

b$.$ using generic data types

c$.$ validating input data and arguments to a method

d$.$ none of the above

$07.$ Which one of the following is considered a safe and secure programming practice?

a$.$ making no assumptions about the actions of clients and users

b$.$ using @SupressWarning $($unchecked$)$

c$.$ adding the comments and headers of the public methods to the class by copying them from the interface

d$.$ all of the above

$08.$ When implementing the bag ADT, which scenario could result in a security problem?

a$.$ the programmer validates input data to a method

b$.$ a constructor throws an exception or error before completing its initialization

c$.$ generics are used to restrict data types of the entries in the collection

d$.$ a group of core methods is not defined

$09.$ When implementing the bag ADT, which scenario could result in a security problem?

a$.$ a SecurityException is thrown in the constructor

b$.$ an IllegalStateException is thrown in the constructor

c$.$ a client attempts to create a bag whose capacity exceeds a given limit

d$.$ the delete method is implemented before the add method

$10.$ An incomplete definition of a method is called a $\_\_\_\_\_.$

a$.$ stub

b$.$ core method

c$.$ fail$-$safe method

d$.$ security problem