CSCI 316: Quiz 6 - Data Types

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What is the primary purpose of data types in programming languages? *

1 point

To enforce naming conventions

To improve execution speed

To determine variable scope

To control memory allocation only

To define the range of values and operations for entities

A primitive data type is best described as: *

1 point

A user-defined composite structure

A dynamically allocated type

A data type with no internal structure visible to the programmer

A type implemented using pointers

A data type composed of multiple fields

Which of the following is typically considered a primitive data type? *

1 point

Record

Array

Integer

Tuple

List

Which characteristic of integers varies across programming languages? *

1 point

Precision and range

Scope rules

Control flow

Name binding

Parameter passing method

Which representation is most commonly used for signed integers? *

1 point

Two’s complement

Excess-128

Gray code

ASCII

One’s complement

Floating-point values are primarily used to represent: *

1 point

Approximate real numbers

Discrete values

Memory addresses

Logical values

Character codes

Which of the following is a disadvantage of floating-point arithmetic? *

1 point

Limited range

High memory usage only

Rounding errors

Inability to represent integers

Lack of hardware support

What is the main design issue for Boolean data types? *

1 point

Range of values

Storage allocation

Variable lifetime

Number of primitive operations provided

Name binding time

A character string type is best described as: *

1 point

A record with one field

A pointer to characters

A primitive numeric type

A sequence of characters treated as a single unit

A fixed-size array only

Which string representation stores the length explicitly? *

1 point

Linked lists of characters

Null-terminated strings

ASCII tables

Fixed-length arrays only

Descriptor-based strings

What is a key advantage of descriptor-based strings? *

1 point

Reduced memory usage

No need for dynamic allocation

Simpler syntax

Faster character access

Constant-time length retrieval

An enumeration type is primarily used to: *

1 point

Implement dynamic typing

Represent pointer values

Store numeric ranges

Store heterogeneous data

Define a set of named integer constants

Which is a major advantage of enumeration types? *

1 point

Support for recursion

Elimination of type checking

Improved program readability and reliability

Reduced memory consumption

Faster arithmetic operations

An array type is defined by: *

1 point

Heterogeneous fields

Its pointer semantics only

Enumeration values

A sequence of homogeneous elements

Dynamic binding rules

Which is a design issue for array types? *

1 point

Indexing method

Exception handling

Scope rules

Variable lifetime

Name binding

Which array index type improves reliability? *

1 point

Character

Boolean

Enumeration

Pointer

Floating-point

What is a row-major array layout? *

1 point

Heap-based layout only

Columns stored contiguously

Rows stored contiguously

Dynamic memory layout

Diagonal elements stored first

Which language typically uses row-major order? *

1 point

C and C++

Fortran

Lisp

Prolog

Ada

An associative array is indexed by: *

1 point

Boolean values

Enumeration values only

Memory addresses

Integers only

Strings or arbitrary keys

Which language heavily relies on associative arrays? *

1 point

Ada

Fortran

Python

Java

A record type is best described as: *

1 point

A heterogeneous collection of fields

A dynamically sized array

A homogeneous collection

A pointer structure

A tuple with no names

Which language refers to records as struct? *

1 point

Lisp

Java

Python

Ada

What distinguishes a tuple from a record? *

1 point

Tuples are arrays

Tuples do not have named fields

Records require dynamic allocation

Records cannot be nested

Tuples allow heterogeneous elements

A list type typically supports: *

1 point

Fixed size at compile time

Stack allocation only

Sequential access via links

Homogeneous fields only

Direct indexed access only

Which language family strongly supports list types? *

1 point

Imperative languages

Functional languages

Assembly languages

Systems languages

Logic-only languages

A union type allows: *

1 point

One of different possible types in the same location

Automatic type conversion

Multiple values stored simultaneously

Safe type checking at runtime

Dynamic resizing

What is a major disadvantage of union types? *

1 point

Inability to store integers

Reduced execution speed

Potential type safety violations

Lack of compiler support

High memory usage

A pointer type stores: *

1 point

An index into an array

A value directly

A memory address

A type descriptor

A record field

A reference type differs from a pointer because it: *

1 point

Cannot be dereferenced

Stores no address

Is implicitly dereferenced

Is dynamically typed

Cannot be aliased

Optional types are primarily designed to: *

1 point

Prevent null reference errors

Improve array indexing

Eliminate dynamic typing

Speed up execution

Replace pointers

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