WGU C949 DATA STRUCTURES AND ALGORITHMS I OBJECTIVE ASSESSMENT EXAM 300 QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES

WGU C949 DATA STRUCTURES AND
ALGORITHMS I OBJECTIVE ASSESSMENT EXAM
300 QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES (VERIFIED
ANSWERS) |AGRADE




What is a characteristic of keys in an associative dictionary data
type? - ANSWER >>>>They are unique and immutable.

Which method can be used to take a value out of a dictionary? -
ANSWER >>>>D1[key].remove(value)

Given this data dictionary in Python:
dict = {'white':0x0000, 'black':0x1111}

Which command/function generates the output ['white','black']? -
ANSWER >>>>dict.keys()

Items were added sequentially in this stack starting with 'ham':
'sausage'
'toast'
'eggs'
'ham'

,What is the correct order of contents after the push operation is
performed with the value 'bacon'? - ANSWER >>>>'bacon'
'sausage'
'toast'
'eggs'
'ham'

Items were added sequentially in this stack starting with "dog":
"bird"
"rabbit"
"cat"
"dog"

What is the return value of the pop operation? - ANSWER
>>>>"bird"

Which sequence of letters represents preorder traversal of the
nodes of this tree?
A
/\
BC
/\
/\
DE
\/\
FGH
/
I - ANSWER >>>>A B C D F E G I H

An array soc of size 1009 is used where the index is an integer in
[0,1008] and the hash-function key%1009.

Where will the data associated with the key given by the last 4
social security digits '2023' be stored? - ANSWER >>>>In soc[5]

,A stack s, a queue q, and a max value priority queue p each have
a single 3 in them. Next s.push(4), q.push(4), and p.push(4) are
executed.

What is the triple (s.pop(), q.pop(), p.pop())? - ANSWER
>>>>(4,3,4)

This stack reads left to right with the top to the right:
'green'
'yellow'
'blue'
'red'

What could be the stack after a push operation? - ANSWER
>>>>['red','blue','yellow', 'green', 'purple"]

Which statement describes a queue data structure? - ANSWER
>>>>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.

What are the official indexes for the list list01 given this
declaration? int[ ] list01 = {0, 2, 4, 6, 8, 10}; - ANSWER >>>>0, 1,
2, 3, 4, 5

Which abstract data type (ADT) has elements of the same type so
that the elements can be retrieved based on the index or
position? - ANSWER >>>>List

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)) - ANSWER >>>>Tuple

Which data type does the mystery function return?
return_type mystery (int R)
{
int NumUnits = R;return NumUnits * 3.14;
} - ANSWER >>>>Double

Which value is appropriate for the variable middle given the
pseudocode?
function mystery()
{
string last;
string first;
char middle;
int phone;
float rate;
} - ANSWER >>>>'D'

What is the most efficient data type to use for this data set of a
fixed size in Java?
a = [0, 0, 1, 4, 7, 16, 31, 64, 127] - ANSWER >>>>Array

What is true about garbage collection? - ANSWER >>>>It
reclaims memory from data structures implemented using linked
allocations.

What is true about a data structure implemented using linked
allocation? - ANSWER >>>>Storage is allocated using pointers to
new locations as needed.

What are the array elements corresponding to the mid-values in
the first and second iterations of a binary search in an array arr =