Introduction to Programming Using Python, Y. Daniel Liang

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Chapter 14 Tuples, Sets, and Dictionaries


Section 14.2 Tuples
14.1  Suppose t = (1, 2, 4, 3), which of the following is incorrect?
A. print(t[3])
B. t[3] = 45
C. print(max(t))
D. print(len(t))
E. print(sum(t))

14.2  Suppose t = (1, 2, 4, 3), t[1 : 3] is _________.
A. (1, 2)
B. (1, 2, 4)
C. (2, 4)
D. (2, 4, 3)
E. (1, 2, 4, 3)

14.3  Suppose t = (1, 2, 4, 3), t[1 : -1] is _________.
A. (1, 2)
B. (1, 2, 4)
C. (2, 4)
D. (2, 4, 3)
E. (1, 2, 4, 3)

14.4  Suppose t = (1, 2, 4, 3, 8, 9), [t[i] for i in range(0, len(t), 2)] is _________.
A. [2, 3, 9]
B. [1, 2, 4, 3, 8, 9]
C. [1, 4, 8]
D. (1, 4, 8)
E. (2, 3, 9)

14.5  Suppose t = (1, 2), 2 * t is _________.
A. (1, 2, 1, 2)
B. [1, 2, 1, 2]
C. (1, 1, 2, 2)
D. [1, 1, 2, 2]
E. illegal

14.6  Suppose t1 = (1, 2, 4, 3) and t2 = (1, 2, 3, 4), t1 < t2 is ________.
A. True
B. False

Section 14.3 Sets
14.7  Which of the following statements produces {'a', 'b', 'c'}?
A. list("abac")
B. tuple("abac")
C. set("abac")
D. None

14.8  You can use ___________ to create an empty set.
A. { }
B. ( )
C. [ ]
D. set()

14.9  Given two sets s1 and s2, s1 < s2 is _________.
A. true if len(s1) is less than len(s2)
B. true ifthe elements in s1 are compared less than the elements in s2.
C. true if s1 is a proper subset of s2
D. true if s1 is a proper superset of s2
E. illegal

14.10  Suppose s = {1, 2, 4, 3}, _______ returns 4.
A. sum(s)
B. len(s)
C. min(s)
D. max(s)
E. None

14.11  Suppose s = {1, 2, 4, 3}, which of the following is incorrect?
A. print(s[3])
B. s[3] = 45
C. print(max(s))
D. print(len(s))
E. print(sum(s))

14.12  Suppose s = {1, 2, 4, 3}, what happens when invoking s.add(4)?
A. There is no add method for a set object.
B. This method is executed fine and 4 is added to the set.
C. Since 4 is already in the set, Python raises a KeyError exception.
D. You cannot add an element from a set.
E. This method is executed fine and 4 is not added to the set since 4 is already in the set.

14.13  Suppose s = {1, 2, 4, 3}, what happens when invoking s.remove(12)?
A. There is no remove method for a set object.
B. This method is executed fine and no exception is raised.
C. Since 12 is not in the set, Python raises a KeyError exception.
D. You cannot remove an element from a set.

14.14  Suppose s1 = {1, 2, 4, 3} and s2 = {1, 3, 4, 2}, ________ is true.
A. s1 == s2
B. s1 != s2

14.15  Suppose s1 = {1, 2, 4, 3} and s2 = {0, 1, 5, 3, 4, 2, 13}, ________ is true.
A. s1.issubset(s2)
B. s1.issuperset(s2)
C. s2.issubset(s1)
D. s2.issuperset(s1)

14.16  Suppose s1 = {1, 2, 4, 3} and s2 = {1, 5, 4, 13}, what is s1 | s2?
A. {1, 2, 4, 3, 1, 5, 4, 13}
B. {1, 2, 4, 3, 5, 13}
C. {1, 2, 4, 3}
D. {1, 5, 4, 13}

14.17  Suppose s1 = {1, 2, 4, 3} and s2 = {1, 5, 4, 13}, what is s1 - s2?
A. {2, 3, 5, 13}
B. {1, 2, 4, 3, 5, 13}
C. {1, 2, 4, 3}
D. {1, 5, 4, 13}
E. {2, 3}

14.18  Suppose s1 = {1, 2, 4, 3} and s2 = {1, 5, 4, 13}, what is s1 & s2?
A. {2, 3, 5, 13}
B. {1, 2, 4, 3, 5, 13}
C. {1, 4}
D. {1, 5, 4, 13}
E. {2, 3}

14.19  Suppose s1 = {1, 2, 4, 3} and s2 = {1, 5, 4, 13}, what is s1 ^ s2?
A. {2, 3, 5, 13}
B. {4, 3, 5, 13}
C. {1, 4}
D. {1, 5, 4, 13}
E. {2, 3}

14.20  Which of the following statement is false?
A. Lists are mutable
B. Tuples are mutable
C. Sets are mutable
D. Strings are mutable

14.21  You can have duplicate elements in a ________?
A. list
B. tuple
C. set

14.22  The elements in a ________ are ordered?
A. list
B. tuple
C. set

14.23  Suppose s = {1, 2}, 2 * s is _________.
A. (1, 2, 1, 2)
B. [1, 2, 1, 2]
C. (1, 1, 2, 2)
D. [1, 1, 2, 2]
E. illegal

14.24  Suppose s1 = {1, 2, 4, 3} and s2 = {1, 5, 4, 13}, s1 + s2 is ____________?
A. {1, 2, 4, 3, 1, 5, 4, 13}
B. {1, 2, 4, 3, 5, 13}
C. {1, 2, 4, 3}
D. {1, 5, 4, 13}
E. illegal

Section 14.5 Dictionary
14.25  Which of the following statements create a dictionary?
A. d = {}
B. d = {"john":40, "peter":45}
C. d = {40:"john", 45:"peter"}
D. d = (40:"john", 45:"peter")

14.26  Suppose d = {"john":40, "peter":45}, the keys are __________
A. "john", 40, 45, and "peter"
B. "john" and "peter"
C. 40 and 45
D. d = (40:"john", 45:"peter")

14.27  Suppose d = {"john":40, "peter":45}, "john" in d is __________
A. True
B. False

14.28  Suppose d1 = {"john":40, "peter":45} and d2 = {"john":466, "peter":45}, d1 == d2 is _______.
A. True
B. False
C. illegal

14.29  Suppose d1 = {"john":40, "peter":45} and d2 = {"john":466, "peter":45}, d1 > d2 is _______.
A. True
B. False
C. illegal

14.30  Suppose d = {"john":40, "peter":45}, d["john"] is __________
A. 40
B. 45
C. "john"
D. "peter"

14.31  Suppose d = {"john":40, "peter":45}, to delete the entry for "john":40, use ________.
A. d.delete("john":40)
B. d.delete("john")
C. del d["john"]
D. del d("john":40)

14.32  Suppose d = {"john":40, "peter":45}, to obtain the number of entries in dictionary, use ________.
A. d.size()
B. len(d)
C. size(d)
D. d.len()

14.33  What will be displayed by the following code?

d = {"john":40, "peter":45}
print(list(d.keys()))
A. ["john", "peter"]
B. ["john":40, "peter":45]
C. ("john", "peter")
D. ("john":40, "peter":45)

14.34  Suppose d = {"john":40, "peter":45}, what happens when retieving a value using d["susan"]?
A. Since "susan" is not a value in the set, Python raises a KeyError exception.
B. It is executed fine and no exception is raised, and it returns None.
C. Since "susan" is not a key in the set, Python raises a KeyError exception.
D. Since "susan" is not a key in the set, Python raises a syntax error.

14.35  Suppose d = {"john":40, "peter":45}, what happens when retieving a value using d.get("susan")?
A. Since "susan" is not a value in the set, Python raises a KeyError exception.
B. It is executed fine and no exception is raised, and it returns None.
C. Since "susan" is not a key in the set, Python raises a KeyError exception.
D. Since "susan" is not a key in the set, Python raises a syntax error.

14.36  Which of the following statements are true?
A. A Python list is immutable if every element in the list is immutable.
B. A Python set is immutable if every element in the set is immutable.
C. A Python tuple is immutable if every element in the tuple is immutable.
D. A Python tuple is immutable.

14.37  Which of the following is a Python list?
A. [1, 2, 3]
B. (1, 2, 3)
C. {1, 2, 3}
D. {}

14.38  Which of the following is a Python tuple?
A. [1, 2, 3]
B. (1, 2, 3)
C. {1, 2, 3}
D. {}

14.39  Which of the following is a Python set?
A. [1, 2, 3]
B. (1, 2, 3)
C. {1, 2, 3}
D. {}

14.40  Which of the following is a Python dictionary?
A. [1, 2, 3]
B. (1, 2, 3)
C. {1, 2, 3}
D. {}

14.41  Which of the following sets is equal to {1, 2, 3}?
A. {1, 2, 3}
B. {2, 1, 3}
C. {3, 2, 1}
D. {2, 3, 1}
E. {1, 2, 3, 2, 1, 3}