题目内容

Both stacks and queues are ( ).

A Linear structure with restricted access points
B Sequentially stored linear structure
C Non-linear structure of linked storage
D Non-linear structure with restricted access points

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According to the order of six elements 6, 5, 4, 3, 2, 1 push into the stack, which of the following is not a legal sequence( ).

A 543612
B 453216
C 346521
D 234156

Set the initial state of stack S and queue Q to be empty. Elements e1, e2, e3, e4, e5, and e6 push into the stack S in sequence. When an element is popped, it push into the queue Q immediately,if the pop sequence of 6 elements is e2, e4, e3, e6, e5, e1, then the capacity of stack S should be at least( ).

A 3
B 6
C 4
D 2

Design an algorithm to judge whether the brackets in the discriminant expression match the occurrence, and the data structure using ( ) is the best.

A stack
B Sequence list
C Queue
D Linked list

The suffix expression of the expression a * (b + c) -d is ( ).

A abc+*d-
B bc+a*d-
C ab*c+d-
D dabc+*-