CBSE Class 11 Computer Science Dictionary in Python MCQs

Question. What will be the output of the following Python 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 : B

Question. In order to store values in terms of key and value we use what core data type
a) list
b) tuple
c) class
d) dictionary

Answer : D

Question. What will be the output?
d = {“john”:40, “peter”:45}
“john” in d
a) True
b) False
c) None
d) Error

Answer : A

Question. 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 : C

Question. Which one of the following is correct?
a) In python, a dictionary can have two same keys with different values.
b) In python, a dictionary can have two same values with different keys
c) In python, a dictionary can have two same keys or same values but cannot have two same key-value pair
d) In python, a dictionary can neither have two same keys nor two same values.

Answer : A

Question. Which of the following will give error?
Suppose dict1={“a”:1,”b”:2,”c”:3}
a) print(len(dict1))
b) print(dict1.get(“b”))
c) dict1[“a”]=5
d) None of these.

Answer : D

Question. 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 : C

Question. What will be the output of the following Python 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 : B

Question. 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 : A

Question. 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 : D

Question. 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 : C

Question. Which of the following is correct with respect to above Python code? d = {“a”:3 ,”b”: 7}
print(list(d.keys()))
a) a dictionary d is created.
b) a and b are the keys of dictionary d.
c) 3 and 7 are the values of dictionary d
d) All of the above.

Answer : D

Question. Which of the following will delete key_value pair for key=”tiger” in dictionary?
dic={“lion”:”wild”, “tiger”:”wild”, “cat”:”domestic”, “dog”:”domestic”}
a) del dic[“tiger”]
b) dic[“tiger”].delete()
c) delete(dic.[“tiger”])
d) del(dic.[“tiger”])

Answer : A

Question. What will be the output of the following Python code snippet?
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 : A

Question. What will be the output of the following Python 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 : D

Question. 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 : A

Question. 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’} c) d)
b) C
c) {1: 3, 2: 3, 3: 3}
d) No method called setdefault() exists for dictionary

Answer : B

Question. What is the output? d = {“john”:40, “peter”:45}
d[“john”]
a) 40
b) 45
c) “john”
d) “peter”

Answer : A

Question. What will be the output of above Python code?
d1={“abc”:5,”def”:6,”ghi”:7}
print(d1[0])
a) abc
b) 5
c) {“abc”:5}
d) Error

Answer : D

Question. Which of the following Python codes will give same output if
(i) dict.pop(“book”)
(ii) del dict[“book”]
(iii) dict.update({“diary”:1,”novel”:5})
dict={“diary”:1,”book”:3,”novel”:5}
a) i, ii, iii
b) i, ii
c) i, iii
d) ii, iii

Answer : B

Question. What will be the output of the following Python code snippet?
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 : A

Question. 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 : B

Question. Suppose d = {“john”:40, “peter”:45}. To obtain the number of entries in dictionary which command do we use?
a) d.size()
b) len
c) size
d) d.len()

Answer : B

Question. What will be the output?
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)

Answer : A

Question. What will be the output of above Python code?
d1={“abc”:5,”def”:6,”ghi”:7}
print(d1[0])
a) abc
b) 5
c) {“abc”:5}
d) Error

Answer : D

Question. What will be the output of the following Python code snippet?
a={1:”A”,2:”B”,3:”C”}
print(a.get(5,4))
a) 1
b) A
c) 4
d) Invalid syntax for get method

Answer : C

Question. What will be the output of the following Python 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 : A

Question. 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 : B

Question. What will the below Python code do?
dict={“Phy”:94,”Che”:70,”Bio”:82,”Eng”:95}
dict.update({“Che”:72,”Bio”:80})
a) It will create new dictionary as dict={“Che”:72,”Bio”:80} and old dict will be deleted.
b) It will throw an error as dictionary cannot be updated.
c) It will simply update the dictionary as dict={“Phy”:94,”Che”:72,”Bio”:80,”Eng”:95}
d) It will not throw any error but it will not do any changes in dict

Answer : C

Question. Keys of the dictionary must be :
a) Similar
b) Unique
c) Can be similar or unique
d) All of these

Answer : B

Question. 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 : B

Question. What will be the output of the following Python code?
>>> 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 : D