WGU C949- DATA STRUCTURES AND ALGORITHMS I 2024 UPDATE COMPREHENSIVE QUESTIONS AND DETAILED SOLUTION (GRADE A+) BALANCED OBJECTIVE ASSESSEMENT

WGU C949- DATA STRUCTURES AND ALGORITHMS I 2024
UPDATE COMPREHENSIVE QUESTIONS AND DETAILED
SOLUTION (GRADE A+) BALANCED OBJECTIVE
ASSESSEMENT

Which statement describes a queue data structure? - (correct 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}; - (correct 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? - (correct 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)) - (correct answer) Tuple

Which data type does the mystery function return?
return_type mystery (int R)
{
int NumUnits = R;return NumUnits * 3.14;
} - (correct 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;
} - (correct 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] - (correct answer) Array

What is true about garbage collection? - (correct answer) It reclaims memory from
data structures implemented using linked allocations.

,What is true about a data structure implemented using linked allocation? - (correct
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 = {45, 77, 89, 90, 94, 99, 100} and key =
100? - (correct answer) 90 and 99

What is the effect on the object Computing regarding garbage collection?
Computing obj = new Computing(); obj = null; - (correct answer) It is automatically
available for garbage collection.

What are the mid-values in the first and second levels of recursion in this binary search?
int arr = {46, 76, 89, 90, 94, 99, 100} and key = 99 - (correct answer) 90 and 99

Which data set is represented using the dictionary data type? - (correct answer) A
set of students and their test scores

What is a characteristic of keys in an associative dictionary data type? - (correct
answer) They are unique and immutable.

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

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

Which command/function generates the output ['white','black']? - (correct 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'? - (correct 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? - (correct answer) "bird"

Which sequence of letters represents preorder traversal of the nodes of this tree?
A
/\
BC
/\
/\
DE
\/\
FGH
/
I - (correct 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? - (correct 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())? - (correct 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? - (correct answer)
['red','blue','yellow', 'green', 'purple"]

Items were added sequentially onto the stack starting with 'red':
'green'
'yellow'
'blue'
'red'

What is the stack after a pop operation? - (correct answer) 'yellow'
'blue'
'red'