Crowdly

Which of the following are/could be operations on lists

removing the item at the head of a list (beheading)

adding all elements of a numerical list (+( 2 3 6 7 8)) ==> 26

rotating a horizontal list to a vertical one

finding the cosine of a list

appending an item to the end or tail of a list

prepending an item to the head of the list

removing the last item in a list (curtailing)

shredding the list--breaking it into individual items

The special value that points nowhere is (depending on the language)

nil

NIL

erewhon

nul

NaN

undefined

Which of these statements is most accurate?

derived types are compatible with their parent type and subtypes are not

subtypes are compatible with their parent type and derived types are not

both subtypes and derived types are always subranges of a parent type

subtypes and derived types are both compatible with their parent type

neither subtypes nor derived types are compatible with their parent type

An operator-rich language for mathematical and symbolic work was

A name that might be used in two different contexts in a language definition is called a

reserved word

Schrödinger Token

reference

parameter

locally scoped item

When one specifies meaning in terms of preconditions and postconditions, one is using

static semantics

EBNF

VDM-SL

denotational semantics

axiomatic. semantics

Which of the following statements is/are correct about a parse tree?

It is read top-to-bottom and left-to-right but evaluated right-to-left

It is read top-to-bottom and right-to-left but evaluated bottom-to-top

It is read bottom-to-top and left-to-right and evaluated bottom-to-top

It is read top-to-bottom and left-to-right but evaluated bottom-to-top

The syntax does not usually define such orders

An early language that included records and was used for business and commercial work was

Arrays where storage is only used for items that have actually been given values, and not for ones that have not are said to be