WGU C949 OA EXAM / WGU C949 DATA STRUCTURES AND
ALGORITHMS OBJECTIVE ASSESSMENT EXAM TESTBANK 2026/2027
PRACTICE QUESTIONS AND STUDY GUIDE ACCURATE EXAM
APPROVED QUESTIONS AND CORRECT DETAILED ANSWERS WITH
RATIONALES (RELIABLE SOLUTIONS) CURRENTLY UPDATED
VERSION 2026 EDITION |GUARANTEED SUCCESS A+ (BRAND NEW!)
FULL REVISED WGU C949 DATA STRUCTUIRES AND ALGORITHMS
ACTUAL OA EXAM
Question 1
What is the runtime complexity for the expression 305 + O(325*N)?
A) O(N^2)
B) N^325
C) O(N^N)
D) O(N)
Correct Answer: D) O(N)
Rationale: The term O(325*N) dominates the expression. According to Big-O
notation, constants are dropped, and the highest-order term determines the
complexity. As 325*N is a linear term, the overall complexity simplifies to O(N).
The constant 305 is negligible in the asymptotic analysis.
Question 2
What is the runtime complexity for this code snippet?
text
,for x in range(N):
for y in range(N):
for z in range(N):
tot = tot + z
print(tot)
A) O(3)
B) O(N^2)
C) O(N)
D) O(N^3)
Correct Answer: D) O(N^3)
Rationale: This code contains three nested loops, each iterating N times. The
innermost statement is executed N * N * N times, which is N^3 times. Therefore,
the runtime complexity is O(N^3).
Question 3
Which term describes an abstract data type (ADT) that Python uses?
A) Array
B) Numeric
C) String
D) Char
Correct Answer: A) Array
,Rationale: In Python, the list data type serves as the primary implementation of the
Array ADT. It provides a dynamic, ordered sequence of elements that can be
accessed by position, fulfilling the fundamental characteristics of an array.
Question 4
Which abstract data type (ADT) is characterized by the LIFO (last in, first out)
principle?
A) Array
B) Stack
C) Queue
D) List
Correct Answer: B) Stack
Rationale: A stack is defined by its LIFO behavior, where the last element added to
the stack is the first one to be removed. This is analogous to a stack of plates where
you always take the top plate first.
Question 5
Which queue operation removes an item from the front of the queue?
A) dequeue
B) enqueue
C) pop()
D) append()
, Correct Answer: A) dequeue
Rationale: In a queue, which operates on the FIFO (first in, first out) principle, the
dequeue operation is responsible for removing and returning the element at the
front of the queue, which is the element that has been waiting the longest.
Question 6
Which function in Python is used to find a specific value in a tuple?
A) count()
B) find()
C) search()
D) index()
Correct Answer: D) index()
Rationale: The index() method is used to find the first occurrence of a specified
value in a tuple. It searches the tuple and returns the index position where the value
is found.
Question 7
Which abstract data type (ADT) allows operations at one end only?
A) Stack
B) List
C) Queue
D) String
ALGORITHMS OBJECTIVE ASSESSMENT EXAM TESTBANK 2026/2027
PRACTICE QUESTIONS AND STUDY GUIDE ACCURATE EXAM
APPROVED QUESTIONS AND CORRECT DETAILED ANSWERS WITH
RATIONALES (RELIABLE SOLUTIONS) CURRENTLY UPDATED
VERSION 2026 EDITION |GUARANTEED SUCCESS A+ (BRAND NEW!)
FULL REVISED WGU C949 DATA STRUCTUIRES AND ALGORITHMS
ACTUAL OA EXAM
Question 1
What is the runtime complexity for the expression 305 + O(325*N)?
A) O(N^2)
B) N^325
C) O(N^N)
D) O(N)
Correct Answer: D) O(N)
Rationale: The term O(325*N) dominates the expression. According to Big-O
notation, constants are dropped, and the highest-order term determines the
complexity. As 325*N is a linear term, the overall complexity simplifies to O(N).
The constant 305 is negligible in the asymptotic analysis.
Question 2
What is the runtime complexity for this code snippet?
text
,for x in range(N):
for y in range(N):
for z in range(N):
tot = tot + z
print(tot)
A) O(3)
B) O(N^2)
C) O(N)
D) O(N^3)
Correct Answer: D) O(N^3)
Rationale: This code contains three nested loops, each iterating N times. The
innermost statement is executed N * N * N times, which is N^3 times. Therefore,
the runtime complexity is O(N^3).
Question 3
Which term describes an abstract data type (ADT) that Python uses?
A) Array
B) Numeric
C) String
D) Char
Correct Answer: A) Array
,Rationale: In Python, the list data type serves as the primary implementation of the
Array ADT. It provides a dynamic, ordered sequence of elements that can be
accessed by position, fulfilling the fundamental characteristics of an array.
Question 4
Which abstract data type (ADT) is characterized by the LIFO (last in, first out)
principle?
A) Array
B) Stack
C) Queue
D) List
Correct Answer: B) Stack
Rationale: A stack is defined by its LIFO behavior, where the last element added to
the stack is the first one to be removed. This is analogous to a stack of plates where
you always take the top plate first.
Question 5
Which queue operation removes an item from the front of the queue?
A) dequeue
B) enqueue
C) pop()
D) append()
, Correct Answer: A) dequeue
Rationale: In a queue, which operates on the FIFO (first in, first out) principle, the
dequeue operation is responsible for removing and returning the element at the
front of the queue, which is the element that has been waiting the longest.
Question 6
Which function in Python is used to find a specific value in a tuple?
A) count()
B) find()
C) search()
D) index()
Correct Answer: D) index()
Rationale: The index() method is used to find the first occurrence of a specified
value in a tuple. It searches the tuple and returns the index position where the value
is found.
Question 7
Which abstract data type (ADT) allows operations at one end only?
A) Stack
B) List
C) Queue
D) String
