getkeys()
key()
keys()
none of the mentioned
What will be the output of the following Python code?
d = {0: 'a', 1: 'b', 2: 'c'}for x in d.values(): print(d[x])
0 1 2
a b c
0 a 1 b 2 c
getkeys ()
None
What is the output of following code
d = {}d[1] = "Python"d[2] = "Java"print(len(d))
0
1
2
Error
a=dict()print(a[1])
An exception is thrown since the dictionary is empty
‘ ‘
d = {}
d = {“john”:40, “peter”:45}
d = {40:”john”, 45:”peter”}
All of the mentioned
What will be the output of the following Python code snippet?
a={1:"A",2:"B",3:"C"}for i,j in a.items(): print(i,j,end=" ")
1 A 2 B 3 C
1 2 3
A B C
1:”A” 2:”B” 3:”C”
test = {1:'A', 2:'B', 3:'C'}test = {} print(len(test))
3
An exception is thrown
a={1:"A",2:"B",3:"C"}a.setdefault(4,"D") print(a)
{1: ‘A’, 2: ‘B’, 3: ‘C’, 4: ‘D’}
[1,3,6,10]
a={1:"A",2:"B",3:"C"}for i in a: print(i,end=" ")
‘A’ ‘B’ ‘C’
1 ‘A’ 2 ‘B’ 3 ‘C’
Error, it should be: for i in a.items():
What will be the output?
d = {"a": 1, "b": 2}print(2 in d)
True
False
KeyError
dictionary()
set()
tuple()
list()
dict1={'a':[3,6,8]}print(len(dict1))
d.size()
len(d)
size(d)
d.len()
a = {} a[1] = 1 a['1'] = 2 a[1.0]=4 count = 0 for i in a: count += a[i] print(count) print(a)
6
total={}def insert(items): if items in total: total[items] += 1 else: total[items] = 1insert('Apple')insert('Ball')insert('Apple') print (len(total))
a={1:"A",2:"B",3:"C"}b=a.copy()b[2]="D" print(a)
Error, copy() method doesn’t exist for dictionaries
{1: ‘A’, 2: ‘B’, 3: ‘C’}
{1: ‘A’, 2: ‘D’, 3: ‘C’}
“None” is printed
a={'B':5,'A':9,'C':7}print(sorted(a))
[‘A’,’B’,’C’]
[‘B’,’C’,’A’]
[5,7,9]
[9,5,7]
String
Dictionary
List
Tuple
a={}a['a']=1a['b']=[2,3,4] print(a)
Exception is thrown
{‘b’: [2], ‘a’: 1}
{‘b’: [2], ‘a’: [3]}
{'a': 1, 'b': [2, 3, 4]}
a={1:"A",2:"B",3:"C"}b={4:"D",5:"E"}a.update(b) print(a)
Method update() doesn’t exist for dictionaries
{1: 'A', 2: 'B', 3: 'C', 4: 'D', 5: 'E'}
{4: ‘D’, 5: ‘E’}
d = {"john":40, "peter":45}print("john" in d)
d = {1:"A", 2:"B", 1:"C"}print(d)
{1:'A',2:'B'}
{1:'C',2:'B'}
{1:'A',1:'C',2:'B'}
Clears all key-value pairs
Updates a specific key
Merges another dictionary into the current one
Removes all values
a={1:"A",2:"B",3:"C"}print(a.items())
Syntax error
dict_items([(‘A’), (‘B’), (‘C’)])
dict_items([(1,2,3)])
dict_items([(1, ‘A’), (2, ‘B’), (3, ‘C’)])
d = {"john":40, "peter":45}print(d["john"])
40
45
“john”
“peter”
a={1:"A",2:"B",3:"C"}print(a.get(3))
Error, invalid syntax
A
5
C
Since “susan” is not a value in the set, Python raises a KeyError exception
It is executed fine and no exception is raised, and it returns None
Since “susan” is not a key in the set, Python raises a KeyError exception
Since “susan” is not a key in the set, Python raises a syntax error
Which of the following will delete key-value pair for key="tiger" in dictionary?
dic={"lion":"'wild","tiger":"'wild",'cat":"domestic","dog":"domestic"}
del dic("tiger")
dic["tiger"].delete()
delete(dic.["tiger'])
del dic["tiger"]
d1={"abc":5,"def":6,"ghi":7}print(d1[0])
abc
{"abc":5}
error
a={1:"A",2:"B",3:"C"}a.clear() print(a)
{ None:None, None:None, None:None}
{1:None, 2:None, 3:None}
{ }
d1 = {"john":40, "peter":45}d2 = {"john":466, "peter":45}print(d1 == d2)
d.delete(“john”:40)
d.delete(“john”)
del d[“john”]
del d(“john”:40)
allkeys()
keyvalues()
a = {}a[1] = 1a['1'] = 2a[1]=a[1]+1count = 0for i in a: count += a[i]print(count)
4
Error, the keys can’t be a mixture of letters and numbers
More than one key can have the same value
The values of the dictionary can be accessed as dict[key]
Values of a dictionary must be unique
Values of a dictionary can be a mixture of letters and numbers
d1 = {"john":40, "peter":45}d2 = {"john":466, "peter":45}print(d1 > d2)
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:’A’, 2: ‘B’,3: ‘C’}
{1: ‘A’, 2: ‘b’, 3: ‘c’, 4: ‘D’, 5: ‘E’}
Removes an arbitrary element
Removes all the key-value pairs
Removes the key-value pair for the key given as an argument
Invalid method for dictionary
More than one key isn’t allowed
Keys must be immutable
Keys must be integers
When duplicate keys encountered, the last assignment wins
>>> a={1:"A",2:"B",3:"C"}>>> del a
method del doesn’t exist for the dictionary
del deletes the values in the dictionary
del deletes the entire dictionary
del deletes the keys in the dictionary
d = {0: 'a', 1: 'b', 2: 'c'}for x in d.values(): print(x)
test = {1:'A', 2:'B', 3:'C'}del test[1]test[1] = 'D'del test[2]print(len(test))
Error as the key-value pair of 1:’A’ is already deleted
a={1:"A",2:"B",3:"C"}print(a.get(1,4))
Invalid syntax for get method
a={'a':4,'b':6,'a':7}print(a)
{'a': 5, 'b': 6,'a': 7 }
{'a': 7, 'b': 6}
{'a': 5, 'b': 6 }
Key Error
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)
25
17
16
Tuples can’t be made keys of a dictionary
del
remove
removeAll
None of these
Returns True if any key of the dictionary is true
Returns False if dictionary is empty
Returns True if all keys of the dictionary are true
Method any() doesn’t exist for dictionary
d.len ()