Viiva

Question 1

What are Python Keywords?

Answer 1

Keywords are reserved words that convey a specific meaning to the
Python interpreter, and we can use a keyword in our program only for the
purpose for which it has been defined.

Question 2

Name any 3 Immutable Data Types

Answer 2

int, string, tuple

Question 3

What is the difference between a list and a tuple

Answer 3

The difference between a list and a tuple is that a list is mutable while a
tuple is not. Tuple can be further implemented as a key to dictionaries.

Question 4

How can you convert a number into a string?

Answer 4

In order to convert a number into a string, use the inbuilt function str(). If
you want an octal or hexadecimal representation, use the inbuilt function
oct() or hex().

Question 5

What are literals in Python?

Answer 5

Python literals can be defined as data which can be assigned to a variable
or constant.
There are five types of literals available in Python:
1. String literals
2. Numeric literals
3. Boolean literals
4. Special literals
5. Literal collections

Question 6

What is an operator in Python?

Answer 6

An operator is a particular symbol that is used on some values and
produces an output as a result.
8. For example,
9. 10+30=40. Here, “+” and “=” are operators

Question 7

Why is the return keyword used in Python?

Answer 7

The purpose of a function is to receive the inputs and return
some output. The return is a Python statement that we can use in a
function for sending a value back to its calling function or the
operating system.

Question 8

What is the difference between the del keyword and clear
() function?

Answer 8

The difference between del keyword and clear () function is
that while del keyword removes one element at a time, clear
function removes all the elements.

Question 9

What is difference between actual and formal parameter/
arguments.

Answer 9

Formal arguments: The formal arguments are the parameters/
arguments in a function declaration.
16. Actual arguments: are values (or variables)/ expressions that
are used inside the parentheses of a function call

Question 10

What is the use of comments in Python?

Answer 10

A comment is text that doesnt affect the outcome of a code, it
is just a piece of text to let someone know what you have done in a
program or what is being done in a block of code.

Question 11

What is the default sep argument/ parameter for print ()
function

Answer 11

The default sep argument for print function is space.

Question 12

What is the default end argument/ parameter for print ()
function?

Answer 12

The default end argument for print () function is the newline character.

Question 13

Which loop in python is known as condition loop in
python?

Answer 13

While loop

Question 14

What is the extension of binary file in Python

Answer 14

.bin or .dat

Question 15

Name any two method/ function which are used to write
text file in python

Answer 15

write() and writelines()

Question 16

Which language translator is used by python?

Answer 16

Interpreter

Question 17

What are the built-in types available in python?

Answer 17

Numbers, Strings, Lists, Tuples, Dictionaries

Question 18

How python interpreter interprets the code?

Answer 18

Python interpreter interprets the code line by line

Question 19

Name a few mutable data types of python.

Answer 19

Lists, Sets, and Dictionaries

Question 20

Name a few immutable data types of python.

Answer 20

Strings, Tuples, Numeric

Question 21

What is the significance of a pass statement in python?

Answer 21

pass is no operation python statement. This is used where python
requires syntax but logic requires no actions

Question 22

. What is slicing in python?

Answer 22

Python slicing is a statement of python that extracts a list of elements
from the given sequence in the range of start and stop values with step
value intervals

Question 23

What are comments in python?

Answer 23

Python comments are nonexecutable text written in the python
program to give a description for a statement or group of statement

Question 24

How to print list l in reverse order in a single line statement

Answer 24

print(l[::-1])

Question 25

Python string can be converted into integer or float?

Answer 25

If the string contains only numbers it can be converted into an integer or float using int() and float() functions

Question 26

What is the difference between / and //?

Answer 26

/ is used for division, // is used for floor division o / returns float as answer whereas // returns integer as answer o / gives you the number with decimal places whereas // gives you only integer part

Question 27

How to check the variables stored in same object in python?

Answer 27

The id() function returns the memory address of python object.

Question 28

What are the parameters of print() function? Explain.

Answer 28

The print function has three parameters:  message – Contains the message to be printed  sep – It is onptional parameter used to print a separator  end – It prints the endline character

Question 29

What is the significance of ‘else’ in loops in python

Answer 29

Else block is written in pyton progrm when loop is not satisfying the condition. It gets executed when the while loop’s condition is false where as in for loop it executes when for loop ends normally.

Question 30

Divya is learning python. She wants to know the version of python using python programming statements. Please help her to accomplish her task.

Answer 30

>>> import sys o >>> sys.version

Question 31

How to remove the last element from a list?

Answer 31

To remove the last element from a list following ways can be used:  l.pop()  del l[-1]

Question 32

What is the difference between append() and extend() methods?

Answer 32

append() is used to add an element to the list to the last. o extend() is used to add multiple elements to the list.

Question 33

.Consider the statement: L = [11,22,33,[45,67]], what will be the output of L[-2+1}?

Answer 33

[45.67]

Question 34

What is tuple unpacking

Answer 34

Tuple unpacking refers to extracting tuple values into a separate variable.

Question 35

What are the two ways to insert an element into dictionary?

Answer 35

Method 1 – Modifying a dictionary with fresh key and value ex. d={1:’A’,2:’B’}; d[3]=’C’ o Method 2 – With a function setdefault ex. d={1:’A’,2:’B’};d.setdefault(3,’C’)

Question 36

Samira wants to remove an element by value. Suggest her a function name to accomplish her task.

Answer 36

l.remove(value)

Question 37

How to remove all elements of a list?

Answer 37

There are two ways to remove all elements of list  Using clear – l.clear()  Using del – del l

Question 38

How del is different from clear?

Answer 38

del removes entire list object where clear() just removes elements and makes list empty

Question 39

What is a function?

Answer 39

A function is a subprogram and a smaller unit of a python program consists of a set of instructions and returns a value

Question 40

Does every python program must return a value?

Answer 40

No, not every python program returns a value

Question 41

What are the parts of a function?

Answer 41

A python function has the following parts:  Function header – Starts with def keyword followed by function name and parameters  Function body – Block of statements/instructions that define the action performed by the function, indentation must be followed  Function caller statement – writing function name including parameter values

Question 42

What are the needs of function in the python program?

Answer 42

Easy program handling o Reduce the size of the program o Reduce the repeated statements o Ambiguity can be reduced o Make program more readable and understandable

Question 43

How to call your function through python interactive mode?

Answer 43

Save a program if not saved and click on Run > Run Module or press the F5 button from the python script mode o Now interactive mode will appear with the message RESTART …… o Write a function call statement with function name and list of parameter values in the brackets o A function call statement is just like a function name with required parameters o Press enter and supply input as per requirements

Question 44

What are void functions? Explain with example

Answer 44

The void functions are those functions that do not return any value. o Python function which does not contain any return statement and having a bunch of different print statements are called void functions. o Python supports a special object “nothing” or None datatype.

Question 45

.Observe the following lines of code and identify function definition or function caller statement: myfun(“TutorialAICSIP”,2020) – function caller with positional arguments o myfun(name=”TutorialAICSIP”,year=2020) – function caller with default arguments o def myfun(name, year=2020) – function definition with default argument o myfun(name=”TutorialAICSIP”,year) – function caller but reaise an erro

Question 46

What are the physical line and logical line structure in python program?

Answer 46

The physical lines in python programs contain EOL (End Of Line) character at the point of termination of lines o The logical lines in python programs contain white spaces or tab or comment at the point of termination of lines

Question 47

What is indentation? Explain its importance in two lines.

Answer 47

Indentation refers to white spaces added before each line of the code. o In python, it detects the block of code. o It also makes the program more readable and presentable. o It organizes the code of blocks in a good manner

Question 48

What is a top-level statement in python?

Answer 48

The python unindented statements in python programs are considered as a top-level-statement. o _main_ is also a python top-level statemen

Question 49

What are the comments? Explain the role of comments in the python programs?

Answer 49

Comments are non-executable parts of python programs. o You can write a comment for the description or information related to statements, basic details of programs etc. o There are two types of comments:  Single-Line: These comments written for explaining single line comments, begins with #  Multi-Line: These comments written for explaining multi-line comments, begins and ends with ”’ triple quote

Question 50

Does python program functions contain multiple return statements and return multiple values?

Answer 50

Yes, python program functions can have multiple return statements. o To return multiple values you can write values with return keyword separated by comm

Question 51

What do you mean by fruitful and non-fruitful functions in python?

Answer 51

The functions which return values are called fruitful functions. o The function not returning values are called non-fruitful functions.

Question 52

Which three types of functions supported by python?

Answer 52

Python supports the following three types of functions:  Built-in Functions  Functions defined in modules  User-defined functions

Question 53

What are parameters and arguments in python programs?

Answer 53

Parameters are the values provided at the time of function definition. For Ex. p,r and n. o Arguments are the values passed while calling a function. For Ex. princ_amt, r, n in main().

Question 54

.Which types of arguments supported by Python?

Answer 54

Positional Arguments: Arguments passed to a function in correct positional order, no. of arguments must match with no. of parameters required.  Default Arguments: Assign default to value to a certain parameter, it is used when the user knows the value of the parameter, default values are specified in the function header. It is optional in the function call statement. If not provided in the function call statement then the default value is considered. Default arguments must be provided from right to left.  Key Word Arguments: Keyword arguments are the named arguments with assigned values being passed in function call statement, the user can combine any type of argument.  Variable Length Arguments: It allows the user to pass as many arguments as required in the program. Variable-length arguments are defined with * symbol

Question 55

What are the rules you should follow while combining different types of arguments?

Answer 55

An argument list must contain positional arguments followed by any keyword argument. o Keyword arguments should be taken from the required arguments preferably. o The value of the argument can’t be specified more than once.

Question 56

What do you mean by python variable scope?

Answer 56

The python variable scope refers to the access location of the variable defined in the program. o A python program structure has different locations to declare and access the variable. o There are two scopes of variables in python:  Local Scope  Global Scope

Question 57

What is the local and global scope variable?

Answer 57

The variable which is declared inside a function and can be accessible inside a function is known as local variable scope. o The variable declared in top-level statements of the python program is called a global variable scope, it is accessible anywhere in the program.

Question 58

What is the full form of LEGB? Explain in detail.

Answer 58

LEGB stands for Local-Enclosing-Global-Buil-in. o Python checks the order of variable in a program by the LEGB rule. o First, it checks for the local variable, if the variable not found in local then it looks in enclosing then global then built-in environment.

Question 59

What are mutable and immutable arguments/parametersin a function call?

Answer 59

Mutable arguments/parameters values changed over the access of value and variable at runtime. o Immutable arguments/parameters whose values cannot be changed. They allocate new memory whenever the value is changed.

Question 60

What are modules in python?

Answer 60

A large program is divided into modules. o A module is a set of small coding instructions written in a programming language. o These modules create a library. o A python module is a .py that contains statements, classes, objects, functions, and variables. o That allows reusing them anytime by importing the module. o The structure of the python module plays an important role in python library functions.

Question 61

Name few commonly used libraries in python.

Answer 61

o Standard library o Numpy Library o Matplotlib o SciPy

Question 62

What do you mean docstrings in python?

Answer 62

Docstrings is the triple quoted text of the python program. o It provides comments related to the authors of the program, details about functions, modules, classes. o The docstrings contents written in the module can be accessed through help().

Question 63

s there any difference between docstrings and comments?

Answer 63

The docstrings and comments ignored by the python interpreter in execution. o But the docstring provides the information about modules, functions or classes which can be accessed by help() function

Question 64

What is the use of dir() function?

Answer 64

The dir() function is used to display defined symbols in the modul

Question 65

.What are the two ways to import modules?

Answer 65

You can import modules in python using these two ways:  import  from import