WGU C949 DATA STRUCTURES AND ALGORITHMS I QUESTIONS AND ANSWERS 2024

WGU C949 DATA STRUCTURES AND
ALGORITHMS I

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?

90 and 99



What is the effect on the object Computing regarding garbage collection?

Computing obj = new Computing(); obj = null;

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

90 and 99



Which data set is represented using the dictionary data type?

A set of students and their test scores



Which statement describes a queue data structure?

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};

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?

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))

Tuple



Which data type does the mystery function return?

return_type mystery (int R)

{

,int NumUnits = R;return NumUnits * 3.14;

}

Double



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

function mystery()

{

string last;

string first;

char middle;

int phone;

float rate;

}

'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]

Array



What is true about garbage collection?

It reclaims memory from data structures implemented using linked allocations.

, What is true about a data structure implemented using linked allocation?

Storage is allocated using pointers to new locations as needed.




What is a characteristic of keys in an associative dictionary data type?

They are unique and immutable.



Which method can be used to take a value out of a dictionary?

D1[key].remove(value)



Given this data dictionary in Python:

dict = {'white':0x0000, 'black':0x1111}

Which command/function generates the output ['white','black']?

dict.keys()



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

'sausage'

'toast'

'eggs'

'ham'