CSCI 316: Quiz 5 - Names, Bindings, Scopes

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What is the primary purpose of names in programming languages? *

1 point

To provide a means of referring to program entities

To represent memory addresses directly

To improve execution speed

To define scope rules

To enforce type safety

Which statement best defines a binding? *

1 point

Association between an attribute and an entity

Lifetime of a variable

Scope of an identifier

Visibility of a name

Allocation of memory to variables

Which attribute is not typically bound to a variable? *

1 point

Scope

Value

Storage location

Font style

Type

Binding that occurs before program execution is called: *

1 point

Static binding

Deferred binding

Dynamic binding

Runtime binding

Late binding

Which binding time is associated with stack-dynamic variables? *

1 point

Load time

Design time

Link time

Compile time

Runtime

A variable is best described as: *

1 point

A fixed memory address

An abstraction of a memory cell

A name permanently bound to a value

A constant expression

A scope delimiter

Which category of variables has the shortest lifetime? *

1 point

Global variables

Static variables

Explicit heap-dynamic variables

Implicit heap-dynamic variables

Stack-dynamic variables

Which variable category is allocated and deallocated by direct programmer commands? *

1 point

Automatic

Stack-dynamic

Explicit heap-dynamic

Implicit heap-dynamic

Static

Implicit heap-dynamic variables are most commonly found in: *

1 point

Fortran

Java

Python

Ada

Which is a disadvantage of static variables? *

1 point

Lack of recursion support

Complex allocation mechanism

Poor readability

High runtime overhead

Unpredictable lifetime

The scope of a variable refers to: *

1 point

The region of program text where it is visible

The memory it occupies

The period during execution it exists

The type of the variable

Its binding time

Which scoping rule binds names based on program structure? *

1 point

Dynamic scoping

Static scoping

Deep scoping

Temporal scoping

Shallow scoping

Which scoping rule determines bindings based on call sequence? *

1 point

Nested

Static

Dynamic

Lexical

Block

Most modern programming languages use: *

1 point

Late scoping

Shallow binding

Dynamic scoping

Static scoping

Temporal scoping

The referencing environment of a statement is: *

1 point

All variables in memory

All declared variables

All heap-allocated objects

All variables visible at that point

All global variables

Lifetime of a variable is defined as: *

1 point

Its scope

The period during which storage is allocated

Runtime visibility

Storage class

Its binding to a type

Which is an advantage of dynamic scoping? *

1 point

Easier static analysis

Faster compilation

Greater flexibility in execution

Better type safety

Improved readability

Which is a major disadvantage of dynamic scoping? *

1 point

No recursion support

Complex garbage collection

Increased memory usage

Excessive compile-time checks

Reduced readability and reliability

Named constants are usually bound at: *

1 point

Compile time

Design time

Runtime

Load time

Link time

Which feature most directly improves program reliability? *

1 point

Shallow binding

Dynamic scoping

Static scoping

Implicit heap-dynamic variables

Late binding

Aliasing occurs when: *

1 point

Multiple names reference the same memory location

Names are resolved dynamically

Variables shadow each other

Scopes overlap

Multiple types bind to one variable

Excessive aliasing primarily reduces: *

1 point

Portability

Compilation speed

Type inference accuracy

Performance

Readability and reliability

Which feature most commonly causes aliasing? *

1 point

Constants

Pointers or references

Local variables

Static variables

Value parameters

Under static scoping, nonlocal references are resolved using: *

1 point

Heap traversal

The program’s lexical structure

The most recent activation record

Random search

The call stack

Which mechanism supports access to nonlocal variables in nested subprograms? *

1 point

Garbage collector

Static chain

Dynamic chain

Hash table

Heap manager

Deep binding determines bindings: *

1 point

At subprogram call time

At variable declaration

At compile time

At subprogram definition time

At program load

Shallow binding determines bindings: *

1 point

At program start

At subprogram call time

At subprogram exit

At block entry

At compile time

Which statement reflects the correct relationship between scope and lifetime? *

1 point

Scope is determined only at runtime

Scope and lifetime are independent concepts

Lifetime applies only to heap variables

Lifetime always exceeds scope

Scope always equals lifetime

Which design goal is best supported by static scoping? *

1 point

Reduced memory usage

Shorter programs

Execution speed

Program readability

Program flexibility

The chapter emphasizes names, bindings, and scopes because they: *

1 point

Affect syntax design

Control execution order

Define data types

Are fundamental to variable behavior and program reliability

Implement exception handling

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