Lets get started with Questions & Answers on Python Programming covering following topics:

1. Questions on Data Types, Operators and Expressions in Python

The section contains questions on datatypes, operators, numbers and their types, regular expressions and variable names.

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Python Questions and Answers – Core Datatypes

This set of Python Questions & Answers focuses on “Core Data Types”.

1. Which of these in not a core datatype?
a) Lists
b) Dictionary
c) Tuples
d) Class
View Answer

Answer:d
Explanation:Class is a user defined datatype.

2. Given a function that does not return any value, What value is thrown by itby default when executed in shell.
a) int
b) bool
c) void
d) None
View Answer

Answer:d
Explanation:Python shell throws a NoneType object back.

3. Following set of commands are executed in shell, what will be the output?

1. >>>str="hello"

2. >>>str[:2]

3. >>>

a) he
b) lo
c) olleh
d) hello
View Answer

Answer:a
Explanation:We are printing only the 1st two bytes of string and hence the answer is “he”.

4. Which of the following will run without errors(multiple answers possible) ?
a) round(45.8)
b) round(6352.898,2)
c) round()
d) round(7463.123,2,1)
View Answer

Answer:a,b
Explanation:Execute help(round) in the shell to get details of the parameters that are passed into the round function.

5. What is the return type of function id ?
a) int
b) float
c) bool
d) dict
View Answer

Answer:a
Explanation:Execute help(id) to find out details in python shell.id returns a integer value that is unique.

6. In python we do not specify types,it is directly interpreted by the compiler, so consider the following operation to be performed.

1. >>>x = 13 ? 2

2. objective is to make sure x has a integer value, select all that apply (python 3.xx)

3. a) x = 13 // 2
   b) x = int(13 / 2)
   c) x = 13 / 2
   d) x = 13 % 2
   View Answer
   
   Answer:a,b
   Explanation:// is integer operation in python 3.0 and int(..) is a type cast operator.
   
   7. What error occurs when you execute?
   apple = mango
   a) SyntaxError
   b) NameError
   c) ValueError
   d) TypeError
   View Answer
   
   Answer:b
   Explanation:Banana is not defined hence name error.
   
   8. Carefully observe the code and give the answer.
   
   
   
   
   
   
   
   
   def example(a):
   
       a = a + '2'
   
        a = a*2
   
       return a
   
   >>>example("hello")
   
   
   
   
   
   
   
   
   
   
   a) indentation Error
   b) cannot perform mathematical operation on strings
   c) hello2
   d) hello2hello2
   View Answer
   
   Answer:a
   Explanation:Python codes have to be indented properly.
   
   9. What dataype is the object below ?
   L = [1, 23, ‘hello’, 1] a) List
   b) dictionary
   c) array
   d) tuple
   View Answer
   
   Answer:a
   Explanation:List datatype can store any values within it.
   
   10. In order to store values in terms of key and value we use what core datatype.
   a) List
   b) tuple
   c) class
   d) dictionary
   View Answer
   
   Answer:d
   Explanation:Dictionary stores values in terms of keys and values.
   
   11. Which of the following results in a SyntaxError(Multiple answers possible) ?
   a) ‘”Once upon a time…”, she said.’
   b) “He said, “Yes!””
   c) ‘3\’
   d) ”’That’s okay”’
   View Answer
   
   Answer:b,c
   Explanation:Carefully look at the colons.
   
   12. The following is displayed by a print function call:
   
   
   
   
   
   
   
   
   tom
   
   dick
   
   harry
   
   Select all of the function calls that result in this output
   a) print(”’tom
   \ndick
   \nharry”’)
   b) print(”’tom
   dick
   harry”’)
   c) print(‘tom\ndick\nharry’)
   d) print(‘tom
   dick
   harry’)
   View Answer
   
   Answer:b,c
   Explanation:The \n adds a new line.           13. What is the average value of the code that is executed below ?
   
   
   
   
   
   
   
   
   
   
   
   >>>grade1 = 80
   
   >>>grade2 = 90
   
   >>>average = (grade1 + grade2) / 2
   
   
   
   
   
   
   
   
   
   
   a) 85
   b) 85.0
   c) 95
   d) 95.0
   View Answer
   
   Answer:b
   Explanation:Cause a decimal value to appear as output.
   
   14. Select all options that print
   hello-how-are-you
   a) print(‘hello’, ‘how’, ‘are’, ‘you’)
   b) print(‘hello’, ‘how’, ‘are’, ‘you’ + ‘-‘ * 4)
   c) print(‘hello-‘ + ‘how-are-you’)
   d) print(‘hello’ + ‘-‘ + ‘how’ + ‘-‘ + ‘are’ + ‘-‘ + ‘you’)
   View Answer
   
   Answer:c,d
   Explanation:Execute in the shell.
   
   15. What is the return value of trunc() ?
   a) int
   b) bool
   c) float
   d) None
   View Answer
   
   Answer:a
   Explanation:Executle help(math.trunc) to get details.