PYTHON Interview Questions and Answers
Question - 31 : - What is the output of print tuple + tinytuple if tuple = ( 'abcd', 786 , 2.23, 'john', 70.2 ) and tinytuple = (123, 'john')?
Answer - 31 : - It will print concatenated tuples. Output would be ('abcd', 786, 2.23, 'john', 70.200000000000003, 123, 'john').
Question - 32 : - What are Python's dictionaries?
Answer - 32 : - Python's dictionaries are kind of hash table type. They work like associative arrays or hashes found in Perl and consist of key-value pairs. A dictionary key can be almost any Python type, but are usually numbers or strings. Values, on the other hand, can be any arbitrary Python object.
Question - 33 : - How will you create a dictionary in python?
Answer - 33 : - Dictionaries are enclosed by curly braces ({ }) and values can be assigned and accessed using square braces ([ ]).
dict = {}
dict['one'] = "This is one"
dict[2] = "This is two"
tinydict = {'name': 'john','code':6734, 'dept': 'sales'}
Question - 34 : - How will you get all the keys from the dictionary?
Answer - 34 : - Using dictionary.keys() function, we can get all the keys from the dictionary object.
print dict.keys() # Prints all the keys.
Question - 35 : - How will you get all the values from the dictionary?
Answer - 35 : - Using dictionary.values() function, we can get all the values from the dictionary object.
print dict.values() # Prints all the values
Question - 36 : - How will you convert a string to an int in python?
Answer - 36 : - int(x [,base]) - Converts x to an integer. base specifies the base if x is a string.
Question - 37 : - How will you convert a string to a long in python?
Answer - 37 : - long(x [,base] ) - Converts x to a long integer. base specifies the base if x is a string.
Question - 38 : - How will you convert a string to a float in python?
Answer - 38 : - float(x) − Converts x to a floating-point number.
Question - 39 : - How will you convert a object to a string in python?
Answer - 39 : - str(x) − Converts object x to a string representation.
Question - 40 : - How will you convert a object to a regular expression in python?
Answer - 40 : - repr(x) − Converts object x to an expression string.