Python Quiz 4 (Prutor answers)

 

                                    Python Quiz:- 4

 

Q:1. How do you declare a dictionary in python?

1.dict [“key”:”value”]

2.dict = {“key”:”value”}

3.Dict = {“key” - “value”}

4.Dict = [“key”:”value”]

Answer is 2

Reason:-  In Python Dictionary declare by curly braces{} and it holds pair of value, one will be the key and other corresponding element is its key:value . So the answer is Dict={"key":"value"}.

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Q:2. What will be the output of the following code:
        dict = { x:x for x in range(1,2) }
        print(dict)

1.{}

2.{x:x,x:x,x:x}

3.{1: 1, 2: 2}

4.{1: 1}

Answer is 4.

Reason:-  In for loop range start from 1 to 2 first execute the loop in 1 then comes 2, output gives {1:1} and exit from the loop.

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Q:3. In python 3.x, Which of the following statement is true for the following code:
        age = input (“Please enter your age”)

1.Age will be an integer type.

2.It removes trailing spaces.

3.age variable's type will be Whatever type is given to it

4.None of the above

Answer is 4.

Reason:- In this code data type of age is not defined so it will be take string datatype by default So answer is None of the above

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Q:4. What will be the output of the following program ?
        int =5
        while int <=-1:
            print (int)
            int = int -1

1.3
     2

2.blank(nothing will be printed)

3.5
     4
     3

4.5
     4
     3
     2
     1

Answer is 2.

Reason:-  Here, int =5 and according to the condition while int<=-1 which will never true and blank will be printed.

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Q:5. What will be the output of the following program ?
        int =3

        while int >=2:
            print (int)
            int = 1

1.3

2.2

3.3 2

4.Error in code

Answer is 1.

Reason :-   According to given condition first time condition will be true and print 3, then 1 will be assigned to int after that condition will be false and it will come out of the loop.