WGU C949 Data Structures And Algorithms PreAssessment: Questions With Fully Explained Solutions

WGU C949 Data Structures And Algorithms
PreAssessment: Questions With Fully Explained
Solutions
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. Correct 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 Correct 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
C.) Stack
D.) Queue Correct 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 Correct 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 Correct 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 Correct Answer - C

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 Correct 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 Correct Answer - C

Which value is appropriate for Test1 given the expression?

char Test1;

A.) 'L'
B.) 77
C.) 6.5
D.) "value" Correct Answer - A

Which value is appropriate for the variable middle given the
pseudocode?

function mystery()
{
string last;
string first;