C949 | WGU C949 | Data Structures and Algorithms Pre-Assessment Questions and answers.

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C949 W GU C949 - Data Str uctur es
an d Algor ithm s Pr e-Assessm en t
Question s an d an sw er s

Which statement describes a queue data structure?
A.) It is a sequence of elements in which insertion and deletion
takes place at one end.
B.) It is a sequence of elements in which insertion and deletion
takes place at both ends.
C.) It is a sequence of elements in which insertion can take
place anywhere in the sequence and deletion takes place only
at the front.
D.) It is a sequence of elements in which insertions can take
place only at the back end and deletions can take place only at
the front end.-answer D


Which data structure allows inserting and deleting data
elements at both the front and the rear?
A.) Trees
B.) Deques
C.) Stacks
D.) Queues-answer B


Which data structure allows elements to be inserted and
deleted from one end and provides no direct access to the
other end?
A.) List
B.) Deque


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C.) Stack
D.) Queue-answer C


What are the official indexes for the list list01 given this
declaration?
int[ ] list01 = {0, 2, 4, 6, 8, 10};
A.) 0, 1, 2, 3, 4, 5
B.) 0, 2, 4, 6, 8, 10
C.) 1, 2, 3, 4, 5, 6
D.) 2, 4, 6, 8, 10, 12-answer A


Which abstract data type (ADT) has elements of the same type
so that the elements can be retrieved based on the index or
position?
A.) List
B.) Bag
C.) Stack
D.) Queue-answer A


Which data structure allows insertion and removal from only
one end of the data structure?
A.) List
B.) Queue
C.) Stack
D.) Deque-answer C




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Which data type does the mystery function return?return_type
mystery (int R)
{
int NumUnits = R;
return NumUnits * 3.14;
}
A.) Byte
B.) String
C.) Double
D.) Boolean-answer C


Which category of data does ("FB", 75.00, 75.03, 74.90)
represent in the pseudocode?
import datetime
def middle(stock, date):
symbol, current, high, low = stock
return (((high + low) / 2), date)
mid_value, date = middle(("FB", 75.00, 75.03, 74.90),
datetime.date(2014, 10, 31))
A.) List
B.) Float
C.) Tuple
D.) Operator-answer C


Which value is appropriate for Test1 given the expression?
char Test1;




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