Explore topic-wise MCQs in Technical Programming.

This section includes 1007 Mcqs, each offering curated multiple-choice questions to sharpen your Technical Programming knowledge and support exam preparation. Choose a topic below to get started.

551.

What is the output of the following piece of code when executed in Python shell? >>> import collections >>> a=dict() >>> a=collections.defaultdict(str) >>> a['A']

A. An exception is thrown since the dictionary is empty
B. ‘ ‘
C. ‘A’
D. 0
Answer» C. ‘A’
Discussion
552.

What is the output of the following piece of code when executed in Python shell? >>> import collections >>> a=dict() >>> a=collections.defaultdict(int) >>> a[1]

A. 1
B. 0
C. An exception is thrown
D. ‘ ‘
Answer» C. An exception is thrown
Discussion
553.

What is the output of the following piece of code when executed in Python shell? >>> a=dict() >>> a[1]

A. An exception is thrown since the dictionary is empty
B. ‘ ‘
C. 1
D. 0
Answer» B. ‘ ‘
Discussion
554.

What is the output of the following piece of code when executed in Python shell? >>> a={i: 'A' + str(i) for i in range(5)} >>> a

A. An exception is thrown
B. {0: ‘A0’, 1: ‘A1’, 2: ‘A2’, 3: ‘A3’, 4: ‘A4’}
C. {0: ‘A’, 1: ‘A’, 2: ‘A’, 3: ‘A’, 4: ‘A’}
D. {0: ‘0’, 1: ‘1’, 2: ‘2’, 3: ‘3’, 4: ‘4’}
Answer» E.
Discussion
555.

What is the output of the following code? >>> a={"a":1,"b":2,"c":3} >>> b=dict(zip(a.values(),a.keys())) >>> b

A. {‘a’: 1, ‘b’: 2, ‘c’: 3}
B. An exception is thrown
C. {‘a’: ‘b’: ‘c’: }
D. {1: ‘a’, 2: ‘b’, 3: ‘c’}
Answer» E.
Discussion
556.

If b is a dictionary, what does any(b) do?

A. Returns True if any key of the dictionary is true
B. Returns False if dictionary is empty
C. Returns True if all keys of the dictionary are true
D. Method any() doesn’t exist for dictionary
Answer» B. Returns False if dictionary is empty
Discussion
557.

What is the output of the following snippet of code? >>> b={} >>> all(b)

A. { }
B. False
C. True
D. An exception is thrown
Answer» D. An exception is thrown
Discussion
558.

What is the output of the following piece of code? >>> a={} >>> a.fromkeys([1,2,3],"check")

A. Syntax error
B. {1:”check”,2:”check”,3:”check”}
C. “check”
D. {1:None,2:None,3:None}
Answer» C. “check”
Discussion
559.

What is the output of the following snippet of code? >>> a={i: i*i for i in range(6)} >>> a

A. Dictionary comprehension doesn’t exist
B. {0: 0, 1: 1, 2: 4, 3: 9, 4: 16, 5: 25, 6:36}
C. {0: 0, 1: 1, 4: 4, 9: 9, 16: 16, 25: 25}
D. {0: 0, 1: 1, 2: 4, 3: 9, 4: 16, 5: 25}
Answer» E.
Discussion
560.

What is the output of the following piece of code? >>> a={'B':5,'A':9,'C':7} >>> sorted(a)

A. [‘A’,’B’,’C’].
B. [‘B’,’C’,’A’].
C. [5,7,9].
D. [9,5,7].
Answer» B. [‘B’,’C’,’A’].
Discussion
561.

What is the output of the following code? a={} a[2]=1 a[1]=[2,3,4] print(a[1][1])

A. [2,3,4].
B. 3
C. 2
D. An exception is thrown
Answer» C. 2
Discussion
562.

What is the output of the following code? count={} count[(1,2,4)] = 5 count[(4,2,1)] = 7 count[(1,2)] = 6 count[(4,2,1)] = 2 tot = 0 for i in count: tot=tot+count[i] print(len(count)+tot)

A. 25
B. 17
C. 16
D. Tuples can’t be made keys of a dictionary
Answer» D. Tuples can’t be made keys of a dictionary
Discussion
563.

What is the output of the following piece of code? >>> import collections >>> a=collections.Counter([3,3,4,5]) >>> b=collections.Counter([3,4,4,5,5,5]) >>> a&b

A. Counter({3: 12, 4: 1, 5: 1})
B. Counter({3: 1, 4: 1, 5: 1})
C. Counter({4: 2})
D. Counter({5: 1})
Answer» C. Counter({4: 2})
Discussion
564.

What is the output of the following piece of code? >>> import collections >>> a=collections.Counter([2,2,3,3,3,4]) >>> b=collections.Counter([2,2,3,4,4]) >>> a|b

A. Counter({3: 3, 2: 2, 4: 2})
B. Counter({2: 2, 3: 1, 4: 1})
C. Counter({3: 2})
D. Counter({4: 1})
Answer» B. Counter({2: 2, 3: 1, 4: 1})
Discussion
565.

What is the output of the following piece of code? >>>import collections >>> b=collections.Counter([2,2,3,4,4,4]) >>> b.most_common(1)

A. Counter({4: 3, 2: 2, 3: 1})
B. {3:1}
C. {4:3}
D. [(4, 3)].
Answer» E.
Discussion
566.

What is the output of the following piece of code? >>>import collections >>> a=collections.Counter([1,1,2,3,3,4,4,4]) >>> a

A. {1,2,3,4}
B. Counter({4, 1, 3, 2})
C. Counter({4: 3, 1: 2, 3: 2, 2: 1})
D. {4: 3, 1: 2, 3: 2, 2: 1}
Answer» D. {4: 3, 1: 2, 3: 2, 2: 1}
Discussion
567.

What is the output of the following snippet of code? a={} a['a']=1 a['b']=[2,3,4] print(a)

A. Exception is thrown
B. {‘b’: [2], ‘a’: 1}
C. {‘b’: [2], ‘a’: [3]}
D. {‘b’: [2, 3, 4], ‘a’: 1}
Answer» E.
Discussion
568.

What is the output of the following snippet of code? = {} a[1] = 1 a['1'] = 2 a[1.0]=4 count = 0 for i in a: count += a[i] print(count)

A. An exception is thrown
B. 3
C. 6
D. 2
Answer» D. 2
Discussion
569.

What is the output of the following snippet of code? test = {1:'A', 2:'B', 3:'C'} del test[1] test[1] = 'D' del test[2] print(len(test))

A. 0
B. 2
C. Error as the key-value pair of 1:’A’ is already deleted
D. 1
Answer» C. Error as the key-value pair of 1:’A’ is already deleted
Discussion
570.

What is the output of the following snippet of code? test = {1:'A', 2:'B', 3:'C'} test = {} print(len(test))

A. 0
B. None
C. 3
D. An exception is thrown
Answer» B. None
Discussion
571.

What is the output of the following snippet of code? numbers = {} letters = {} comb = {} numbers[1] = 56 numbers[3] = 7 letters[4] = 'B' comb['Numbers'] = numbers comb['Letters'] = letters print(comb)

A. Error, dictionary in a dictionary can’t exist
B. Numbers’: {1: 56, 3: 7}
C. {‘Numbers’: {1: 56}, ‘Letters’: {4: ‘B’}}
D. {‘Numbers’: {1: 56, 3: 7}, ‘Letters’: {4: ‘B’}}
Answer» E.
Discussion
572.

What is the output of the following snippet of code? a = {} a[1] = 1 a['1'] = 2 a[1]=a[1]+1 count = 0 for i in a: count += a[i] print(count)

A. 1
B. 2
C. 4
D. Error, the keys can’t be a mixture of letters and numbers
Answer» D. Error, the keys can’t be a mixture of letters and numbers
Discussion
573.

What is the output of the following snippet of code? total={} def insert(items): if items in total: total[items] += 1 else: total[items] = 1 insert('Apple') insert('Ball') insert('Apple') print (len(total))

A. 3
B. 1
C. 2
D. 0
Answer» D. 0
Discussion
574.

If a is a dictionary with some key-value pairs, what does a.popitem() do?

A. Removes an arbitrary element
B. Removes all the key-value pairs
C. Removes the key-value pair for the key given as an argument
D. Invalid method for dictionary
Answer» B. Removes all the key-value pairs
Discussion
575.

What is the output of the following snippet of code? >>> a={1:"A",2:"B",3:"C"} >>> del a

A. method del doesn’t exist for the dictionary
B. del deletes the values in the dictionary
C. del deletes the entire dictionary
D. del deletes the keys in the dictionary
Answer» D. del deletes the keys in the dictionary
Discussion
576.

Which of the statements about dictionary values if false?

A. More than one key can have the same value
B. The values of the dictionary can be accessed as dict[key].
C. Values of a dictionary must be unique
D. Values of a dictionary can be a mixture of letters and numbers
Answer» D. Values of a dictionary can be a mixture of letters and numbers
Discussion
577.

Execute the following in Python shell? >>> a={1:"A",2:"B",3:"C"} >>> a.items()

A. Syntax error
B. dict_items([(‘A’), (‘B’), (‘C’)])
C. dict_items([(1,2,3)])
D. dict_items([(1, ‘A’), (2, ‘B’), (3, ‘C’)])
Answer» E.
Discussion
578.

. What is the output of the following code? a={1:"A",2:"B",3:"C"} for i in a: print(i,end=" ")

A. 1 2 3
B. ‘A’ ‘B’ ‘C’
C. 1 ‘A’ 2 ‘B’ 3 ‘C’
D. Error, it should be: for i in a.items():
Answer» B. ‘A’ ‘B’ ‘C’
Discussion
579.

What is the output of the following code? a={1:5,2:3,3:4} print(a.pop(4,9))

A. 9
B. 3
C. Too many arguments for pop() method
D. 4
Answer» B. 3
Discussion
580.

What is the output of the following code? a={1:5,2:3,3:4} a.pop(3) print(a)

A. {1: 5}
B. {1: 5, 2: 3}
C. Error, syntax error for pop() method
D. {1: 5, 3: 4}
Answer» C. Error, syntax error for pop() method
Discussion
581.

Which of the following isn’t true about dictionary keys?

A. More than one key isn’t allowed
B. Keys must be immutable
C. Keys must be integers
D. When duplicate keys encountered, the last assignment wins
Answer» D. When duplicate keys encountered, the last assignment wins
Discussion
582.

What is the output of the following code? a={1:"A",2:"B",3:"C"} a.clear() print(a)

A. None
B. { None:None, None:None, None:None}
C. {1:None, 2:None, 3:None}
D. { }
Answer» E.
Discussion
583.

What is the output of the following code? a={1:"A",2:"B",3:"C"} b=a.copy() b[2]="D" print(a)

A. Error, copy() method doesn’t exist for dictionaries
B. {1: ‘A’, 2: ‘B’, 3: ‘C’}
C. {1: ‘A’, 2: ‘D’, 3: ‘C’}
D. “None” is printed
Answer» C. {1: ‘A’, 2: ‘D’, 3: ‘C’}
Discussion
584.

What is the output of the following code? a={1:"A",2:"B",3:"C"} b={4:"D",5:"E"} a.update(b) print(a)

A. {1: ‘A’, 2: ‘B’, 3: ‘C’}
B. Method update() doesn’t exist for dictionaries
C. {1: ‘A’, 2: ‘B’, 3: ‘C’, 4: ‘D’, 5: ‘E’}
D. {4: ‘D’, 5: ‘E’}
Answer» D. {4: ‘D’, 5: ‘E’}
Discussion
585.

What is the output of the following code? a={1:"A",2:"B",3:"C"} a.setdefault(4,"D") print(a)

A. {1: ‘A’, 2: ‘B’, 3: ‘C’, 4: ‘D’}.
B. None.
C. Error.
D. [1,3,6,10].
Answer» B. None.
Discussion
586.

What is the output of the following code? a={1:"A",2:"B",3:"C"} print(a.setdefault(3))

A. {1: ‘A’, 2: ‘B’, 3: ‘C’}
B. C
C. {1: 3, 2: 3, 3: 3}
D. No method called setdefault() exists for dictionary
Answer» C. {1: 3, 2: 3, 3: 3}
Discussion
587.

What is the output of the following code? a={1:"A",2:"B",3:"C"} print(a.get(5,4))

A. Error, invalid syntax
B. A
C. 5
D. 4
Answer» E.
Discussion
588.

What is the output of the following piece of code? a={1:"A",2:"B",3:"C"} print(a.get(1,4))

A. 1
B. A
C. 4
D. Invalid syntax for get method
Answer» C. 4
Discussion
589.

What is the output of the following code? a={1:"A",2:"B",3:"C"} for i,j in a.items(): print(i,j,end=" ")

A. 1 A 2 B 3 C
B. 1 2 3
C. A B C
D. 1:”A” 2:”B” 3:”C”
Answer» B. 1 2 3
Discussion
590.

Which of the following is not a declaration of the dictionary?

A. {1: ‘A’, 2: ‘B’}
B. dict([[1,”A”],[2,”B”]])
C. {1,”A”,2”B”}
D. { }
Answer» D. { }
Discussion
591.

Which of these about a dictionary is false?

A. The values of a dictionary can be accessed using keys
B. The keys of a dictionary can be accessed using values
C. Dictionaries aren’t ordered
D. Dictionaries are mutable
Answer» C. Dictionaries aren’t ordered
Discussion
592.

Suppose d = {“john”:40, “peter”:45}, what happens when we try to retrieve a value using the expression 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
Answer» D. Since “susan” is not a key in the set, Python raises a syntax error
Discussion
593.

Suppose d = {“john”:40, “peter”:45}. To obtain the number of entries in dictionary which command do we use?

A. d.size()
B. len(d)
C. size(d)
D. d.len()
Answer» C. size(d)
Discussion
594.

Suppose d = {“john”:40, “peter”:45}, to delete the entry for “john” what command do we use

A. d.delete(“john”:40)
B. d.delete(“john”)
C. del d[“john”].
D. del d(“john”:40)
Answer» D. del d(“john”:40)
Discussion
595.

What is the output? d = {"john":40, "peter":45} d["john"]

A. 40
B. 45
C. “john”
D. “peter”
Answer» B. 45
Discussion
596.

What will be the output? d1 = {"john":40, "peter":45} d2 = {"john":466, "peter":45} d1 > d2

A. True
B. False
C. Error
D. None
Answer» D. None
Discussion
597.

What will be the output? d1 = {"john":40, "peter":45} d2 = {"john":466, "peter":45} d1 == d2

A. True
B. False
C. None
D. Error
Answer» C. None
Discussion
598.

What will be the output? d = {"john":40, "peter":45} "john" in d

A. True
B. False
C. None
D. Error
Answer» B. False
Discussion
599.

Read the code shown below carefully and pick out the keys? d = {"john":40, "peter":45}

A. john”, 40, 45, and “peter”
B. “john” and “peter”
C. 40 and 45
D. d = (40:”john”, 45:”peter”)
Answer» C. 40 and 45
Discussion
600.

Which of the following statements create a dictionary?

A. d = {}
B. d = {“john”:40, “peter”:45}
C. d = {40:”john”, 45:”peter”}
D. All of the mentioned
Answer» E.
Discussion