What is the value of the following postfix expression 5 2 - 8 4 + *?: A) -9 B) 2
ID: 3715091 • Letter: W
Question
What is the value of the following postfix expression 5 2 - 8 4 + *?:
A) -9
B) 28
C) 35
D) 36
An algorithm that uses a stack to implement a non-recursive solution to the HPAir problem reaches the conclusion that there is no oath from an origin city to a destination city only after:
A) the algorithm has backtracked to the origin
B) the algorithm has backtracked to the origin and there remains no unvisited cities to fly to from the origin
C) the algorithm has reached a city and there remains no unvisited cities to fly to from that city
D) the algorithm has reached th destination and there remains no unvisited cities to fly to from the destination
When a recursive call to a function occurs, the compilers implementation must remember all of the followint information EXCEPT:
A) values of parameter
B) values of local variables
C) values of global variables
D) a reference to the point from wich the recursive call was made
What is accomplished by hiding implementations of a stack in a class?
A) client code can access any entries of the stack
B) only the top of the stack can be accessed by client code
C) you can also treat the ADT as a queue
D) the code runs faster
How is the order of the entries of an ADT list determined?
A) by the list itself
B) by the client
C) by the operating systed) the order doesn’t matter
In the list based implementation of the ADT lst, which of the following is not a private variable in the classe?
A) headPtr
B) isEmpty
C) itemCount
D) getNodeAt
Explanation / Answer
1)
D
36
2)
B
the algorithm has backtracked to the origin and there remain no unvisited cities to fly to from the origin
3)
C
values of global variables
4)
B
only the top of the stack can be accessed by client code.
According one can answer only first four questions.
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