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Which of the following statements create a dictionary

Which of the following statements create a dictionary?

  1. d = {}
  2. d = {“john”:40, “peter”:45}
  3. d = {40:”john”, 45:”peter”}
  4. All of the mentioned
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Read the code shown below carefully and pick out the keys

Read the code shown below carefully and pick out the keys?

d = {"john":40, "peter":45}
  1. “john”, 40, 45, and “peter”
  2. “john” and “peter”
  3. 40 and 45
  4. d = (40:”john”, 45:”peter”)
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What will be the output

What will be the output

d = {"john":40, "peter":45}"
john" in d
  1. True
  2. False
  3. None
  4. Error
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What will be the output

What will be the output

d1 = {"john":40, "peter":45}
d2 = {"john":466, "peter":45}
d1 == d2
  1. True
  2. False
  3. None
  4. Error
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What will be the output

What will be the output?

d1 = {"john":40, "peter":45}
d2 = {"john":466, "peter":45}
d1 > d2
  1. True
  2. False
  3. None
  4. Error
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What is the output

What is the output?

d = {"john":40, "peter":45}
d["john"]
  1. 40
  2. 45
  3. “john”
  4. “peter”
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Suppose d = {“john”:40, “peter”:45}, to delete the entry for “john” what command do we us

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

  1. d.delete(“john”:40)
  2. d.delete(“john”)
  3. del d[“john”].
  4. del d(“john”:40)
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Suppose d = {“john”:40, “peter”:45}. To obtain the number of entries in dictionary which command do we use

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

  1. d.size()
  2. len(d)
  3. size(d)
  4. d.len()
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What will be the output

What will be the output?

d = {"john":40, "peter":45}
print(list(d.keys()))
  1. [“john”, “peter”].
  2. [“john”:40, “peter”:45].
  3. (“john”, “peter”)
  4. (“john”:40, “peter”:45)
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Suppose d = {“john”:40, “peter”:45}, what happens when we try to retrieve a value using the expression d[“susan”]

Suppose d = {“john”:40, “peter”:45}, what happens when we try to retrieve a value using the expression d[“susan”]?

  1. Since “susan” is not a value in the set, Python raises a KeyError exception
  2. It is executed fine and no exception is raised, and it returns None
  3. Since “susan” is not a key in the set, Python raises a KeyError exception
  4. Since “susan” is not a key in the set, Python raises a syntax error
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Which of these about a dictionary is false

Which of these about a dictionary is false?

  1. The values of a dictionary can be accessed using keys
  2. The keys of a dictionary can be accessed using values
  3. Dictionaries aren’t ordered
  4. Dictionaries are mutable
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Which of the following is not a declaration of the dictionary

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

  1. {1: ‘A’, 2: ‘B’}
  2. dict([[1,”A”],[2,”B”]])
  3. {1,”A”,2”B”}
  4. { }
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What is the output of the following code

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=" ")
  1. 1 A 2 B 3 C
  2. 1 2 3
  3. A B C
  4. 1:”A” 2:”B” 3:”C”
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What is the output of the following piece of code

What is the output of the following piece of code?

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

What is the output of the following code?

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

What is the output of the following code?

a={1:"A",2:"B",3:"C"}
print(a.setdefault(3))
  1. {1: ‘A’, 2: ‘B’, 3: ‘C’}
  2. C
  3. {1: 3, 2: 3, 3: 3}
  4. No method called setdefault() exists for dictionary
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What is the output of the following code

What is the output of the following code?

a={1:"A",2:"B",3:"C"}
a.setdefault(4,"D")
print(a)

 

 

  1. {1: ‘A’, 2: ‘B’, 3: ‘C’, 4: ‘D’}.
  2. None
  3. Error.
  4. [1,3,6,10].
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What is the output of the following code

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)
  1. {1: ‘A’, 2: ‘B’, 3: ‘C’}
  2. Method update() doesn’t exist for dictionaries
  3. {1: ‘A’, 2: ‘B’, 3: ‘C’, 4: ‘D’, 5: ‘E’}
  4. {4: ‘D’, 5: ‘E’}
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What is the output of the following code

What is the output of the following code?

a={1:"A",2:"B",3:"C"}
b=a.copy()
b[2]="D"
print(a)
  1. Error, copy() method doesn’t exist for dictionaries
  2. {1: ‘A’, 2: ‘B’, 3: ‘C’}
  3. {1: ‘A’, 2: ‘D’, 3: ‘C’}
  4. “None” is printed
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What is the output of the following code

What is the output of the following code?

a={1:"A",2:"B",3:"C"}
a.clear()
print(a)
  1. None
  2. { None:None, None:None, None:None}
  3. {1:None, 2:None, 3:None}
  4. { }
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total MCQs: 124

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