Answer_Key_Version_3
pdf
keyboard_arrow_up
School
Michigan State University *
*We aren’t endorsed by this school
Course
232
Subject
Computer Science
Date
Jan 9, 2024
Type
Pages
11
Uploaded by BailiffHawk7826
Exam 1
CSE 232 (Introduction to Programming II)
Fall 2023
ANSWERS VERSION 3
Full Name:
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PID:
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Instructions:
•
DO NOT START/OPEN THE EXAM UNTIL TOLD TO DO SO.
•
You may however write and bubble in your name, PID and
VERSION/FORM NUMBER
(with
a #2 pencil) on the front of the printed exam and bubble sheet prior to the exam start. This exam is
Answers Version 3.
•
Present your MSU ID (or other photo ID) when returning your bubble sheet and printed exam.
•
Only choose one option for each question.
•
Assume any needed
#include
s and
using std::...;
namespace declarations are performed for the
code samples.
•
Every question is worth the same amount of points. There are 55 questions, but you only need 50
questions correct for a perfect score.
•
No electronics are allowed to be used or worn during the exam. This means smart-watches, phones and
headphones need to be placed away in your bag.
•
The exam is open note, meaning that any paper material (notes, slides, prior exams, assignments, books,
etc.) are all allowed. Please place all such material on your desk prior to the start of the exam, (so you
won’t need to rummage in your bag during the exam).
•
If you have any questions during the exam, please raise your hand and a proctor will assist you.
http://xkcd.com/499/
Answers Version 3
Page 1 of 11
1. Which of the following invokes a function
with no arguments provided?
(a)
Func
{}
(b)
Func
(c)
Func(NULL)
(d)
Func(void)
(e)
Func()
(f)
(Func)
Correct answers:
(e)
2. Which of the following can you NOT make
a const reference to?
(a) A reference
(b) A value returned by a function
(c) A pointer
(d) A const value
(e) A non-const value
(f) A literal value
(g) All of the above permit const refer-
ences
Correct answers:
(g)
3. C++ was created to extend which prior
programming language?
(a) Basic
(b) C+
(c) Haskell
(d) Bash
(e) Fortran
(f) C
(g) Python
(h) None of the above
Correct answers:
(f)
4. The following code is an example of what
problem?
if (is
file
open)
if (data
is
full && process)
Turn
On
Alarm(4);
else
Close
File();
(a) Unsigned Overflow Problem
(b) Overloaded Operator Problem
(c) Dangling Else Problem
(d) Inconsistent Capitalization Problem
(e) Ambiguous Flow Control Problem
(f) Under-Documented Problem
Correct answers:
(c)
5. What does this code output?
for (unsigned i = 4; i >= 0; --i)
{
std::cout << i;
}
(a)
4321
(b)
43210
(c)
3210
(d)
321
(e) None of the above
Correct answers:
(e)
6. How many iterations of the while loop will
occur?
while (7)
{
int x = 4;
++x;
if (x > 6)
{
break;
}
}
(a) 0 iterations
(b) 1 iteration
(c) 2 iterations
(d) 4 iterations
(e) 6 iterations
(f) 7 iterations
(g) more than 13 iterations
Correct answers:
(g)
Answers Version 3
Page 2 of 11
7. What is the return type of this function?
std::string Exclamation(int num)
{
return "!";
}
(a)
std::string
(b)
Exclamation
(c)
int *
(d)
"!"
(e)
int
(f) None of the above
Correct answers:
(a)
8. What happens if you index beyond the end
of a string. Example:
std::string s
{
"abc"
}
;
std::cout << s[3];
(a) A Run-Time Error
(b) A Syntax Error
(c) A random character will be returned
(d) Undefined Behavior
(e) A character from another string will
be returned
(f) The last character will be returned
Correct answers:
(d)
9. On my system, when I call
sizeof(bool);
I get the value
1
. What does this mean?
(a) It means that a bool takes up one
word (on a 64-bit machine this is 64
bits).
(b) It means that a bool takes up one
byte.
(c) It means that a bool can hold at most
one value.
(d) It means that a bool takes up one bit.
(e) It means that a bool’s size is the same
as the size of a function.
(f) It means that a bool true value is
equivalent to an integer 1.
(g) It means that a bool’s type deter-
mines if it is true or false.
Correct answers:
(b)
10. The
getline
function will read from a
stream until what type of character is en-
countered?
(a) A
whitespace
character
(include
space, newline, and tab)
(b) The space character
(c) A non-alphabetic character
(d) A non-ASCII character
(e) The newline character
Correct answers:
(e)
11. Declaring all local variables at the begin-
ning of a function is bad practice because
it results in unnecessarily large XXXXs.
What term should replace XXXXs?
(a) Functions
(b) Code sizes
(c) Memory uses
(d) Scopes
(e) Comments
(f) Blocks
(g) Exceptions
(h) Variable names
Correct answers:
(d)
12. Why should you generally not compare
floats for equality?
(a) Because floats must be converted to
ints before comparison operators can
be used
(b) Because float arithmetic is imprecise
(c) Because
floats
don’t
support
the
equality operator
(d) Because a float’s value changes each
time it is read
(e) Because floats are casted to doubles
when used in math
(f) All of the above are false, floats should
be compared for equality
Correct answers:
(b)
Answers Version 3
Page 3 of 11
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
13. What is the output of the following code?
std::cout << static
cast<int>(’b’);
(a) 0
(b) 1
(c) 2
(d) 3
(e) 4
(f) None of the above
Correct answers:
(f)
14. Which of the following is NOT a binary op-
erator?
(a)
&&
(b)
<<
(c)
++
(d)
+=
(e)
=
(f)
/
(g)
>=
Correct answers:
(c)
15. After
the
code
below
executes,
which
pointers have the same value as
a
?
int x = 67; int y = 34;
int * a = &x;
int * b = &y;
int * c = b;
int * d = &y;
*c = 67;
*b = *a;
d = a;
*d = 34;
(a)
b
(b)
c
(c)
d
(d) Both
b
and
c
(e) All of
b
,
c
, and
d
(f) None of them have the same value as
a
(g) The code is invalid, and thus no an-
swer can be given
Correct answers:
(c)
16. What type must x be for the following code
to compile?
x = cout << 4;
(a)
std::string
(b) An integer type
(c) A stream
(d) No type exists that
x
could be as the
code above can’t possibly compile
(e) The type
auto
(f) None of the above
Correct answers:
(c)
17. The
continue
statement is different from
the
break
statement in one key way, what
is it?
(a) It is actually identical to
break
, its
use is entirely aesthetic.
(b) It can’t be used in blocks due to the
ambiguity.
(c) It is only supported by specific com-
pilers and isn’t in the language stan-
dard
(d) It requires the use of an
if
statement.
(e) It causes iteration to resume instead
of cease.
(f) Its use is strongly discouraged due to
the poor habits it inspires
(g) It always creates an infinite loops,
unless a
break
statement is also in-
cluded.
(h) It is only permitted in while loops, but
not in other iterative statements.
Correct answers:
(e)
Answers Version 3
Page 4 of 11
18. The language feature of using the same op-
erator many times in a single statement, for
example:
apple = banana = carrot;
or
cin >> apple >> banana >> carrot;
Is called what?
(a) Chaining
(b) Assignment
(c) Iteration
(d) Implicit Execution
(e) Linkage
(f) Fall-through
(g) Repetition
Correct answers:
(a)
19. What is a pointer’s value?
(a) A signed long
(b) A const reference to another object
(c) An address in memory
(d) The value
nullptr
unless it was ini-
tialized or assigned
(e) All of the above
Correct answers:
(c)
20. What is wrong with this function invoca-
tion?
std::cout << Func(int x, &y);
(a) Functions can’t be invoked in larger
expressions
(b) The code will result in undefined be-
havior due to the lack of assignment
(c) The ampersand (
&
) doesn’t belong in
a function call
(d)
Func
is an invalid name due to the
presence of an uppercase letter
(e) Arguments shouldn’t have a type dec-
laration
(f) The
std::endl
was omitted
(g) The namespace for the function isn’t
specified
Correct answers:
(e)
21. Which of the following is a
char
literal?
(a)
"Z"
(b)
a
(c)
’#’
(d)
*chr
(e)
char
(f)
char
literal
Correct answers:
(c)
22. When writing C++ code how often should
you compile (and run) your code?
(a) As often as possible
(b) After each function is completed
(c) After each comment is written
(d) You should never compile/run your
code, you should rely on continuous
integration
(e) After every expression is written
(f) Once per individual program written
Correct answers:
(a)
23. What does the
std::endl
object do when
passed as the second operand to the inser-
tion operator?
(a) It indicates the End-Of-File
(b) It doesn’t do anything, it is instead
used to indicate comments
(c) It resets the stream
(d) It causes the stream to separate words
according to whitespace
(e) It indicates that the stream should be
prepared for new characters
(f) It can’t be used with an insertion op-
erator
(g) It causes a newline character to be
written to the stream
Correct answers:
(g)
Answers Version 3
Page 5 of 11
24. What is the relative path for the current
working directory?
(a)
..
(b)
pcwd
(c)
.
(d)
/
(e)
~
(f)
-
Correct answers:
(c)
25. What is wrong with the following function?
bool Func(std::string s)
{
while (!s.empty())
{
if (s.at(0) == ’a’)
{
return true;
}
s = s.substr(1);
}
}
(a) Control can reach the end of a non-
void function
(b) The function doesn’t conform to the
style guide
(c) A string can’t be used in a conditional
expression
(d) Strings don’t have a substr member
function
(e) Nothing is wrong with the function
Correct answers:
(a)
26. In order for file redirection to work, what
must a program do?
(a) It must be compiled with the
-r
flag
(b) It must have a using directive for the
std
namespace
(c) It must read and/or write to the stan-
dard file streams
(d) It must conform to the language stan-
dard and the style guide
(e) It must be an executable C++ pro-
gram
(f) It must terminate only after the End-
Of-File is encountered
(g) It must be executed by an IDE
Correct answers:
(c)
27. What is printed by the following code?
char c = ’e’;
c++;
std::cout << c;
(a)
d
(b)
e
(c)
f
(d)
e1
(e)
1
(f)
c
(g) None of the above due to a compila-
tion error
Correct answers:
(c)
28. When will a stream (like
cin
) evaluate as
false in a conditional expression?
(a) When the stream has extracted a false
value
(b) When the stream is waiting to access
a file
(c) Always, a stream is always considered
false
(d) Never, a stream is always considered
true
(e) When the stream is in an error state
like at End-Of-File.
(f) When the stream has more characters
to process
Correct answers:
(e)
29. How many bytes are needed to compose one
long long
?
(a) 1
(b) 2
(c) 4
(d) 8
(e) It depends on the compiler/hardware
Correct answers:
(e)
Answers Version 3
Page 6 of 11
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
30. When you increment a pointer, for instance:
++pointer
variable;
What happens?
(a) Undefined
behavior,
the
language
specification doesn’t specify what will
happen, so the result is undefined
(b) Nothing happens, because the prefix
increment was used, only the value re-
turned is affected
(c) The value at the pointer’s address is
incremented by one
(d) The pointer now points to the next
address in memory
(e) A syntax error is thrown by the com-
piler as pointers can’t be incremented
Correct answers:
(d)
31. The
-r
flag for the
rm
program is short for
what?
(a) recursive
(b) reverse
(c) rotating
(d) ranked
(e) return
(f) relevant
(g) recent
(h) repeat
Correct answers:
(a)
32. If you have an integer variable that you
know can never be negative, what type
should you use to store it?
(a)
int
(b)
double
(c)
std::string
(d)
char
(e)
bool
(f)
long
(g)
unsigned
Correct answers:
(a)
33. When outputting a double, sometimes it
outputs like this:
1.400e-06
What does this mean?
(a) It means that you are outputting too
many values at once and they are
overwriting each other
(b) It means the value 1.4 combined with
error code number 6
(c) It means that the double is stored
with some estimated imprecision
(d) It means that the buffer is full and
needs to be written to the output de-
vice
(e) It means 1.4 times 10 raised to the
negative 6
(f) None of the above are true
Correct answers:
(e)
34. What is the value of
x
?
std::string s
{
"abcde"
}
;
int x = static
cast<int>(s.size());
(a) 5
(b) 6
(c) 7
(d)
int
(e)
unsigned int
(f) Impossible to determine with the in-
formation given
Correct answers:
(a)
35. What is the type of
x
?
std::string const a
{
"CSE232"
}
;
auto x = a.at(1);
(a)
char const
(b)
std::string const &
(c)
char const *
(d)
char const &
(e)
char &
(f)
std::string &
(g)
std::string const *
(h)
std::string const
(i)
char
Correct answers:
(i)
Answers Version 3
Page 7 of 11
36. What is the term that describes the fact
that one function’s local variables can’t be
directly altered by other functions?
(a) Locality
(b) Encapsulation
(c) Lifetime
(d) Separation
(e) Independence
(f) Syntax
(g) Legibility
Correct answers:
(b)
37. Which of these types do we recommend
against using?
(a) double
(b) long
(c) char
(d) int
(e) bool
(f) None of these types are recommended
against
Correct answers:
(b)
38. What
arguments
is
this
function
being
called with?
int x = 4; int y = 17;
Func(++x, y--);
(a) 5 and 17
(b) 4 and 17
(c) 4 and 16
(d) 5 and 16
Correct answers:
(a)
39. If a function’s sole purpose is its side-effects,
what should its return type be?
(a)
void
(b)
int
(c) It doesn’t matter as the return state-
ment won’t have a value.
(d) It depends on if the function performs
IO operations.
(e) Impossible to determine as all func-
tions must return a value.
(f) Omitted
Correct answers:
(a)
40. A newline character is required by the lan-
guage standard after which of the following
statements?
(a) For loop statements
(b) Preprocessor statements
(c) Function Definitions
(d) Block statements
(e) Switch case statements
(f) None of the above
Correct answers:
(f)
41. Most C++ fundamental types wrap around
when they overflow/underflow. But which
of the following types does the C++ stan-
dard guarantee will have this behavior?
(a)
int
(b)
std::string
(c)
char
(d)
unsigned long
(e)
short
(f) None of the above
Correct answers:
(d)
42. Accessing the value of an uninitialized
char
variable will result in what?
(a) A null pointer
(b) A segmentation fault
(c) A compile-time error
(d) Undefined behavior
(e) A null character
(f) A random character from the ASCII
chart
(g) The space character (
’ ’
)
Correct answers:
(d)
Answers Version 3
Page 8 of 11
43. Why shouldn’t you return a reference to a
local variable?
(a) Wrong, you should return references
to local variables.
(b) Because references can only be initial-
ized, not declared.
(c) Because local variables must be const
and references could alter them.
(d) Because local variables will be de-
stroyed when they go out of scope.
(e) Because it violates the property of
”Independence”
(f) Because a function’s return type can’t
have type modifiers.
(g) Because making a reference will cause
an unnecessary copy to be created.
Correct answers:
(d)
44. Which type of pointer should you NOT
dereference?
(a) A pointer to a const object
(b) A pointer to a local variable
(c) A
pointer
that
points
at
another
pointer
(d) A null pointer
(e) A pointer that has been assigned
(f) A const pointer
(g) A pointer with a memory address
(h) A pointer to a null character
Correct answers:
(d)
45. What is the distinction between an inter-
preter and a compiler?
(a) An
interpreter
can
only
interpret
some languages (like Python), but
compilers can compile all possible lan-
guages.
(b) An
interpreter
interprets
the
code
and makes decisions about ambiguous
code in the manner that the developer
most likely intended, a compiler will
instead halt and raise an error if am-
biguous code is encountered.
(c) An interpreter isn’t guaranteed to al-
ways do the same thing when pre-
sented with the same source code, a
compiler must always have determin-
istic behavior.
(d) An interpreter runs the source code
being interpreted, a compiler gener-
ates a new program that can be run
later.
(e) None of the above are true
Correct answers:
(d)
46. The
std
in
std::cout
is an example of
what part of C++?
(a) An exception
(b) A file
(c) A class
(d) An object
(e) A namespace
(f) A function
(g) A variable
(h) A using
Correct answers:
(e)
Answers Version 3
Page 9 of 11
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
47. For what values of
x
will this program have
a ’b’ character in the output?
switch (x + 1)
{
case 0:
case 1:
std::cout << ’a’;
case 2:
std::cout << ’b’;
default:
std::cout << ’c’;
}
(a)
-1
(b)
0
(c)
1
(d)
2
(e)
3
(f)
-1
,
0
, and
1
(g)
0
,
1
, and
2
(h)
-1
,
1
,
2
, and
3
(i) All possible values of
x
Correct answers:
(f)
48. Which of the following is FALSE about ini-
tializations?
(a) Initializations must use a literal value.
(b) Initialization
is
recommended
to
avoid undefined behavior.
(c) Initialization is necessary for
const
variables.
(d) Initialization (or declaration) needs to
be made before a variable is used.
(e) Initialization can use an equal sign,
curly brackets or parentheses.
(f) All of the above are true
Correct answers:
(a)
49. For which values of
int x
will the following
expression be true?
-2 < x <= 2
(a) -1, 0, 1
(b) All possible values of x
(c) -1, 0, 1, 2
(d) None exist
(e) -2, -1, 0, 1, 2
(f) -2, -1, 0, 1
Correct answers:
(b)
50. What is the type of x?
auto x = My
Function("abcd");
(a)
std::string
(b)
int
(c)
char
(d)
void
(e) Impossible to determine with the in-
formation given
Correct answers:
(e)
51. When will the body of the if statement ex-
ecute?
if (x || y)
{
...
}
(a) Only when
x
is true
(b) Only when
y
is true
(c) Only when
x
and
y
are both true
(d) Only when one of either
x
or
y
are
true
(e) Only when
x
and/or
y
are true
(f) Impossible to determine with the in-
formation given
Correct answers:
(e)
52. How do you make a variable that can have
multiple types?
(a) By using
decltype
(b) By using
static
cast
(c) By declaring its type as
auto
(d) By using
typedef
(e) It is impossible
Correct answers:
(e)
Answers Version 3
Page 10 of 11
53. Why shouldn’t you start the name of a vari-
able with a digit?
(a) Because doing so will result in unde-
fined behavior.
(b) Because such names will shadow other
names in the namespace
std
(c) Because it violates the language stan-
dard.
(d) Because doing so is a code smell.
(e) Because it makes the variable
const
(f) Because it will be confusing to future
readers.
Correct answers:
(c)
54. A syntax error is an example of what cate-
gory of error?
(a) Undefined behavior
(b) A run-time error
(c) A user-defined error
(d) A compile-time error
(e) An uncaught exception
(f) An instrumental error
Correct answers:
(d)
55. How do you create a null reference?
(a) By allowing the reference’s lifetime to
end
(b) By making a reference to a derefer-
enced null pointer
(c) By assigning it the value
false
(d) By subtracting one from a null char-
acter
(e) By using
const
cast
(f) By assigning it the value
0
(g) None of the above, it is impossible
Correct answers:
(g)
Answers Version 3
Page 11 of 11
Related Documents
Recommended textbooks for you
C++ for Engineers and Scientists
Computer Science
ISBN:9781133187844
Author:Bronson, Gary J.
Publisher:Course Technology Ptr
Principles of Information Systems (MindTap Course...
Computer Science
ISBN:9781285867168
Author:Ralph Stair, George Reynolds
Publisher:Cengage Learning
Fundamentals of Information Systems
Computer Science
ISBN:9781305082168
Author:Ralph Stair, George Reynolds
Publisher:Cengage Learning
C++ Programming: From Problem Analysis to Program...
Computer Science
ISBN:9781337102087
Author:D. S. Malik
Publisher:Cengage Learning
Fundamentals of Information Systems
Computer Science
ISBN:9781337097536
Author:Ralph Stair, George Reynolds
Publisher:Cengage Learning
Systems Architecture
Computer Science
ISBN:9781305080195
Author:Stephen D. Burd
Publisher:Cengage Learning
Recommended textbooks for you
- C++ for Engineers and ScientistsComputer ScienceISBN:9781133187844Author:Bronson, Gary J.Publisher:Course Technology PtrPrinciples of Information Systems (MindTap Course...Computer ScienceISBN:9781285867168Author:Ralph Stair, George ReynoldsPublisher:Cengage LearningFundamentals of Information SystemsComputer ScienceISBN:9781305082168Author:Ralph Stair, George ReynoldsPublisher:Cengage Learning
- C++ Programming: From Problem Analysis to Program...Computer ScienceISBN:9781337102087Author:D. S. MalikPublisher:Cengage LearningFundamentals of Information SystemsComputer ScienceISBN:9781337097536Author:Ralph Stair, George ReynoldsPublisher:Cengage LearningSystems ArchitectureComputer ScienceISBN:9781305080195Author:Stephen D. BurdPublisher:Cengage Learning
C++ for Engineers and Scientists
Computer Science
ISBN:9781133187844
Author:Bronson, Gary J.
Publisher:Course Technology Ptr
Principles of Information Systems (MindTap Course...
Computer Science
ISBN:9781285867168
Author:Ralph Stair, George Reynolds
Publisher:Cengage Learning
Fundamentals of Information Systems
Computer Science
ISBN:9781305082168
Author:Ralph Stair, George Reynolds
Publisher:Cengage Learning
C++ Programming: From Problem Analysis to Program...
Computer Science
ISBN:9781337102087
Author:D. S. Malik
Publisher:Cengage Learning
Fundamentals of Information Systems
Computer Science
ISBN:9781337097536
Author:Ralph Stair, George Reynolds
Publisher:Cengage Learning
Systems Architecture
Computer Science
ISBN:9781305080195
Author:Stephen D. Burd
Publisher:Cengage Learning