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Test

Ch 11

Nina Van Ess 13 preguntas Actualizado el 11 dic 2023

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Preguntas del test (13)

  1. 1 An [blank_start]abstraction[blank_end] is a view or representation of an entity
    that includes only the most significant attributes.
    1. Aabstraction
  2. 2The two types of abstraction are [blank_start]process[blank_end] abstraction and [blank_start]data[blank_end] abstraction.
    1. Aprocess
    2. Bdata
  3. 3Syntactically, ADT is an [blank_start]enclosure[blank_end] that includes only the
    [blank_start]data representation[blank_end] of [blank_start]one[blank_end] specific data type and the
    [blank_start]subprograms[blank_end] that provide the operations for that type.
    1. Aenclosure
    2. Bdata representation
    3. Cone
    4. Dsubprograms
  4. 4An instance of an ADT is called an [blank_start]object[blank_end]
    1. Aobject
  5. 5An Abstract Data Type (ADT) is [blank_start]a user-defined[blank_end] data type
    that satisfies the following two conditions:
    1. The [blank_start]representation of objects[blank_end] of the type is [blank_start]hidden[blank_end] from
    the program units that use these objects (i.e. client),
    so the only operations possible on those objects are
    provided [blank_start]in the type's definition[blank_end] -- [blank_start]Information hiding[blank_end]
    2. The [blank_start]declarations[blank_end] of the type and the [blank_start]protocols[blank_end] of
    the operations on objects of the type are contained
    in [blank_start]a single syntactic unit[blank_end].
    1. Aa user-defined
    2. Brepresentation of objects
    3. Chidden
    4. DInformation hiding
    5. Ein the type's definition
    6. Fdeclarations
    7. Gprotocols
    8. Ha single syntactic unit
  6. 6 Advantages of the 1st condition: [blank_start]information hiding[blank_end]
    – [blank_start]Reliability:[blank_end] a client [blank_start]cannot manipulate[blank_end] the representation
    of objects, so increase the integrity of such objects.
    Objects [blank_start]can be only changed[blank_end] through the provided
    operations.
    – [blank_start]Reduces[blank_end] the range of code and variables of which the
    programmer must be aware.
    – Name conflicts are [blank_start]less[blank_end] likely.
    1. Ainformation hiding
    2. BReliability:
    3. Ccannot manipulate
    4. Dcan be only changed
    5. EReduces
    6. Fless
  7. 7• Advantages of the 2nd condition: [blank_start]a single syntactic unit[blank_end]
    – Provides a method of [blank_start]program organization[blank_end].
    – Aids [blank_start]modifiability[blank_end] (everything associated with a data
    structure is together).
    – [blank_start]Separate compilation[blank_end].
    1. Aa single syntactic unit
    2. Bprogram organization
    3. Cmodifiability
    4. DSeparate compilation
  8. 8A facility for defining ADTs in a language must provide:
    • A [blank_start]syntactic unit[blank_end] in which to encapsulate the type definition.
    • A [blank_start]method[blank_end] of making type names and subprogram headers visible to clients, while hiding actual definitions.
    • Some [blank_start]primitive operations[blank_end] must be built into the language processor.
    – Operations that [blank_start]apply to a broad range of ADT[blank_end]:
    • e.g.) assignment and comparisons for equality and inequality
    – Some operations [blank_start]are commonly needed[blank_end], but must be defined by [blank_start]the type designer[blank_end]
    • e.g.) iterators, constructors, destructors
    1. Asyntactic unit
    2. Bmethod
    3. Cprimitive operations
    4. Dapply to a broad range of ADT
    5. Eare commonly needed
    6. Fthe type designer
  9. 9Design Issues for ADT
    • [blank_start]Encapsulate[blank_end] a single type, or something more?
    • What types can be [blank_start]abstract[blank_end]?
    • Can abstract types be [blank_start]parameterized[blank_end]?
    • What [blank_start]access controls[blank_end] are provided?
    • Is the specification of the type [blank_start]physically separate[blank_end] from its implementation?
    1. AEncapsulate
    2. Babstract
    3. Cparameterized
    4. Daccess controls
    5. Ephysically separate
  10. 10Encapsulation original motivation:
    • Two special needs for [blank_start]large[blank_end] programs:
    1. Some means of [blank_start]organization[blank_end], other than simply division into subprograms.
    2. Some means of [blank_start]partial compilation[blank_end] (compilation units that are smaller than the whole program)
    1. Aorganization
    2. Blarge
    3. Cpartial compilation

Información

Descripción
Test sobre Ch 11, creado por Nina Van Ess el 08/12/2023.
Idioma
English
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Creado el 8 dic 2023 · actualizado el 11 dic 2023
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