Which of the following statements about cursors and iterators are true? (Check all that apply)

Question

BlackTom AI · Accepted Answer

Question asks which statements about cursors and iterators are true, with a check-all-that-apply format. 
Option 1: 'Changing the position of an iterator for an object T also changes the position of T's cursor.' This is typically false because iterators are separate abstraction layers that provide traversal control, while the cursor is an internal position within the ADT. Moving an external iterator does not inherently move the ADT's internal cursor, so this claim confuses separate concepts. 
Option 2: 'An ADT can't be coded to have more than one cursor.' This is generally false; an ADT can be designed to expose multiple internal cursors or positions, allowing several independent traversals or views to coexist. The statement imposes a universal limitation that does not hold in all designs. 
Option 3: 'Both cursors and iterators represent positions in a data structure.' This is true in standard abstractions: a cursor denotes the internal position within the structure, while an iterator provides a means to traverse positions; both are about locating or referencing positions. 
Option 4: 'A cursor is internal to an ADT (abstract data structure) but iterators are separate objects.' This is true in many formal models: the cursor is part of the ADT's internal state, whereas iterators are external objects that reference the structure to traverse it. 
Option 5: 'The user of an ADT can control how many cursors the ADT has.' This is typically false; the number of internal cursors is a design choice of the ADT, not something the user usually controls at run time. The abstraction generally hides internal cursors from direct manipulation. 
In summary, the statements that align with common ADT cursor-iterator distinctions are options 3 and 4, while options 1, 2, and 5 describe conditions that are not generally accurate in standard models.

XLMC0202501 Topic 4 Quiz

Which of the following statements about cursors and iterators are true? (Check all that apply)

查看解析

登录即可查看完整答案

类似问题

In a consumer society, many adults channel creativity into buying things

Economic stress and unpredictable times have resulted in a booming industry for self-help products

People born without creativity never can develop it

A product has a selling price of $20, a contribution margin ratio of 40% and fixed cost of $120,000. To make a profit of $30,000. The number of units that must be sold is: Type the number without $ and a comma. Eg: 20000

Which of the following statement regarding cost is correct:

Under the assumptions used in cost-volume-profit analysis, as the activity increases:

The CVP and break-even analysis are supported by a range of important assumptions. Which of the following is not an assumption of the CVP:

The break-even point is that at which:

更多留学生实用工具

考试浏览器助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单