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python interview questions :11

What is the index access method called?

  • In Python, what is the [1:3] syntax on the second line called
test = (1,2,3,4,5)
print(test[1:3])
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  • The second parameter ("3") seems to be the index - 1 (3 - 1 = 2)

python interview questions :12

Can't concat bytes to str?

  • This is proving to be a rough transition over to python on here:
f = open( 'myfile', 'a+' )
f.write('test string' + '\n')

key = "pass:hello"
plaintext = subprocess.check_output(['openssl', 'aes-128-cbc', '-d', '-in', test, '-base64', '-pass', key])
print (plaintext)

f.write (plaintext + '\n')
f.close()
The output file looks like:
test string
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python interview questions :13

What Is The Statement That Can Be Used In Python If The Program Requires No Action But Requires It Syntactically?

  • The pass statement is a null operation. Nothing happens when it executes. You should use “pass” keyword in lowercase.
  • If you write “Pass” you’ll face an error like “NameError: name Pass is not defined.” Python statements are case sensitive
letter = "hai sethuraman"
for i in letter:
    if i == "a":
        pass
        print("pass statement is execute ..............")
    else:
        print(i)
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python interview questions :14

What’s The Process To Get The Home Directory Using ‘~’ In Python?

  • You need to import the os module, and then just a single line would do the rest.
import os
print (os.path.expanduser('~'))
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Output

/home/runner

python interview questions :15

What Are The Built-In Types Available In Python?

Here is the list of most commonly used built-in types that Python supports:

  • Immutable built-in types of Python
    • Numbers
    • Strings
    • Tuples
  • Mutable built-in types of Python
    • List
    • Dictionaries
    • Sets

python interview questions :16

How To Find Bugs Or Perform Static Analysis In A Python Application?

  • You can use PyChecker, which is a static analyzer. It identifies the bugs in Python project and also reveals the style and complexity related bugs.
  • Another tool is Pylint, which checks whether the Python module satisfies the coding standard

python interview questions :17

When Is The Python Decorator Used?

  • Python decorator is a relative change that you do in Python syntax to adjust the functions quickly.

python interview questions :18

What Is The Key Difference Between A List And The Tuple?

List Vs Tuple.

  • The major difference between a list and the tuple is that the list is mutable while tuple is not.
  • A tuple is allowed to be hashed, for example, using it as a key for dictionaries.

python interview questions :19

How Does Python Handle The Memory Management?

  • Python uses private heaps to maintain its memory. So the heap holds all the Python objects and the data structures. This area is only accessible to the Python interpreter; programmers can’t use it.
  • And it’s the Python memory manager that handles the Private heap. It does the required allocation of the heap for Python objects.
  • Python employs a built-in garbage collector, which salvages all the unused memory and offloads it to the heap space.

python interview questions :20

What Are The Principal Differences Between The Lambda And Def?

Def.

  • def can hold multiple expressions while lambda is a uni-expression function.
  • def generates a function and designates a name so as to call it later. lambda forms a function and returns the function itself.
  • def can have a return statement. lambda can’t have return statements

Lambda

  • lambda supports to get used inside a list and dictionary.
  • By the way, retrieving only a slice at an opening index that surpasses the no. of items in the list won’t result in an IndexError. It will just return an empty list.

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