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#LyX 2.3 created this file. For more info see http://www.lyx.org/
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Arizona State University
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SER222: Data Structures & Algorithms
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\noindent
Lect.
Ruben Acuña
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Revised 4/9/2016
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Midterm Practice Questions
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There are 16 points of practice questions available.
If you want to treat them as a practice exam, give yourself 45 minutes.
For the real exam, you will be allowed ONE 3x5 note card.
Note that the questions in this practice are labeled with the units in
which the material was covered; the same may not hold for the real exam.
This practice exam has three types of questions:
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Multiple choice questions:
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True or false questions:
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Unit 11: Analysis of Algorithms
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2
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Unit 12: Introduction to Collections - Stacks
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2
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Unit 13: Linked Structures - Stacks
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Unit 14: Queues
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2
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Unit 15: Lists
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Unit 16: Iterators
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2
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Unit 17: Recursion
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Unit 18: Searching and Sorting
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2
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Total:
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16
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Unit 1: Analysis of Algorithms [2 points]
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\series bold
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Unit 0: Software Quality [2 points]
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Which of the following is not an aspect of software quality:
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From [A][O] midterm.
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Correctness
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\begin_layout Enumerate
Credibility
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Correct.
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Usability
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Portability
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Which of the following developmental tasks would NOT be part of ensuring
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Making sure components are well documented for use in future projects.
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\begin_layout Enumerate
Making sure components are small and easy to understand.
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\begin_layout Enumerate
Making sure components are developed using a coding style standard.
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\begin_layout Enumerate
Making sure components are decoupled and easy to reuse in other projects.
\begin_inset Note Note
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Correct.
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\begin_layout Enumerate
What is the Big-oh order of the following function?
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\begin_inset Formula $O(1)$
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\begin_layout Enumerate
\begin_inset Formula $O(n)$
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\begin_layout Enumerate
\begin_inset Formula $O(nlogn)$
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\begin_inset Note Note
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Correct.
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\begin_layout Enumerate
\begin_inset Formula $O(n^{2})$
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\begin_layout Enumerate
\begin_inset Formula $O(n^{2}logn)$
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\begin_layout Enumerate
What is the Big-Oh order of the following code fragment? The fragment is
parametrized on the variable
\begin_inset Formula $n$
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.
Assume that you are measuring the number of println calls.
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for (int i = 1; i <= n; i++)
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for (int j = 1; j <= n; j *= 10)
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System.out.println("Nested loops!");
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\begin_layout Enumerate
\begin_inset Formula $O(1)$
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\begin_layout Enumerate
\begin_inset Formula $O(logn)$
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\begin_layout Enumerate
\begin_inset Formula $O(n)$
\end_inset
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\begin_layout Enumerate
\begin_inset Formula $O(nlogn)$
\end_inset
\begin_inset Note Note
status open
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Correct.
\end_layout
\end_inset
\end_layout
\begin_layout Enumerate
\begin_inset Formula $O(n^{2})$
\end_inset
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\begin_layout Enumerate
\begin_inset Formula $O(n^{2}logn)$
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\begin_layout Standard
\series bold
Unit 2: Introduction to Collections - Stacks [2 points]
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\begin_layout Enumerate
Trace a stack (called S) through the following operations:
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inline false
status open
\begin_layout Plain Layout
Stack<Integer> S = new Stack<Integer>();
\end_layout
\begin_layout Plain Layout
S.push(new Integer(7));
\end_layout
\begin_layout Plain Layout
Integer X = S.pop();
\end_layout
\begin_layout Plain Layout
S.push(new Integer(4));
\end_layout
\begin_layout Plain Layout
S.push(new Integer(5));
\end_layout
\begin_layout Plain Layout
Integer Y = S.peek();
\end_layout
\begin_layout Plain Layout
S.push(new Integer(1));
\end_layout
\begin_layout Plain Layout
S.push(new Integer(3));
\end_layout
\begin_layout Plain Layout
Integer Z = S.pop();
\end_layout
\begin_layout Plain Layout
Y = S.pop();
\end_layout
\end_inset
\begin_inset Separator latexpar
\end_inset
\end_layout
\begin_deeper
\begin_layout Standard
Give the contents of the stack after this code has been executed.
\end_layout
\begin_layout Enumerate
4 5 (top)
\begin_inset Note Note
status open
\begin_layout Plain Layout
Correct.
\end_layout
\end_inset
\end_layout
\begin_layout Enumerate
4 (top)
\end_layout
\begin_layout Enumerate
7 4 1 3 (top)
\end_layout
\begin_layout Enumerate
None of the above.
\end_layout
\begin_layout Standard
\begin_inset VSpace 6cm
\end_inset
\end_layout
\end_deeper
\begin_layout Enumerate
The variable top in the array implementation of a stack refers to:
\begin_inset Note Note
status open
\begin_layout Plain Layout
From [A][O] midterm.
\end_layout
\end_inset
\begin_inset Separator latexpar
\end_inset
\end_layout
\begin_deeper
\begin_layout Enumerate
The next available position in the array.
\end_layout
\begin_layout Enumerate
The item at the top of the Stack.
\end_layout
\begin_layout Enumerate
The number of items in the stack.
\end_layout
\begin_layout Enumerate
Both a and c.
\begin_inset Note Note
status open
\begin_layout Plain Layout
Correct.
\end_layout
\end_inset
\end_layout
\begin_layout Standard
\series bold
Unit 3: Linked Structures - Stacks [4 points]
\end_layout
\end_deeper
\begin_layout Enumerate
A pop operation on a stack returns a(n):
\begin_inset Note Note
status open
\begin_layout Plain Layout
From LC Quiz 4.
\end_layout
\end_inset
\begin_inset Separator latexpar
\end_inset
\end_layout
\begin_deeper
\begin_layout Enumerate
node
\end_layout
\begin_layout Enumerate
element
\begin_inset Note Note
status open
\begin_layout Plain Layout
Correct.
\end_layout
\end_inset
\end_layout
\begin_layout Enumerate
variable
\end_layout
\begin_layout Enumerate
pointer
\end_layout
\end_deeper
\begin_layout Enumerate
Is the following a correct implementation of a method to add a node (containing
\emph on
element