# Important Questions Python Fundamentals Class 11 Informatics Practices

Please refer to Important Questions Python Fundamentals Class 11 Informatics Practices below. These questions and answers have been prepared based on the latest examination guidelines and NCERT book issued for Class 11 Informatics Practices for the current academic year. We have provided Important Questions for Class 11 Informatics Practices for all chapters here. Python Fundamentals is an important chapter in Class 11 Informatics Practices, following Important Questions and their solutions will help you to get more marks in examinations.

## Python Fundamentals Class 11 Informatics Practices Important Questions

Q.1 What is None literal in Python?
Ans:
Python has one special literal, which is None. The None literal is used to indicate absence of value. It is also used to indicate the end of lists in Python. It means “There is nothing here”.

Q.2 What is the error in following code: x, y =7 ?
Ans:
The following error comes – ‘int’ object is not iterable. Which means an integer object i.e. cannot be repeated for x and y. one more integer object is required after 7.

Q.3 What will the following code do: a=b=18 ?
Ans:
This code will assign 18 to a and b both.

Q.4 Following code is creating problem X = 0281, find reason.
Ans:
0281 is an invalid token.

Q.5 Find the error in the following code:

(a) temp=90

Print temp

(b) a=12

b = a + b

print( a And b)

(c) print(“x=”x)

(d) a, b, c=2, 8, 4

print(a, b, c)

c, b, a = a, b, c

print(a; b; c)

(e) x = 23

4 = x

(f) else = 21-4

Ans:

(a) Missing parentheses in call to ‘print’.

(b) Name „b‟ is not defined.

(c) Invalid Syntax.

(d) Invalid Syntax in second print statement.

(e) can’t assign to literal in second line.

(f) Invalid Syntax.

Q.6 Find the error in the following code:

(a) y = x +5

print(x,y)

(b) a=input(“Value: “)

b = a/2

print( a, b)

(c) print(x = y = 5)

Ans:

(a) Name ‘x’ is not defined.

(b) Unsupported operand type(s) for /: ‘str’ and ‘int’.

(c) Invalid Syntax.

Q.1 What is the difference between a keyword and an identifier?
Ans:
Difference between Keyword and Identifier: Every language has keywords and identifiers, which are only understood by its compiler. Keywords are predefined reserved words, which possess special meaning. An identifier is a unique name given to a particular variable, function or label of class in the program.

Q.2 What are literals in Python? How many types of Literals allowed in Python?
Ans:
Literals: Python comes with some built-in objects. Some are used so often that Python has a quick way to make these objects, called literals.
The literals include the string, Unicode string, integer, float, long, list, tuple and dictionary types.

Q.3 How many types of sequences are supported in Python?
Ans:
Three Types of Sequences are supported in python:
(i) String
(ii) List
(iii) Tuple

Q.4 What factors guide the choice of identifiers in program?
Ans:
(i) An identifier must start with a letter or underscore followed by any number of digits and/or letters.
(ii) No reserved word or standard identifier should be used.
(iii) No special character (Other than underscore) should be included in the identifier.

Q.5 What is the difference between an expression and a statement in Python?

Ans: A statement is an instruction that the Python interpreter can execute. We have only seen the assignment statement so far. Some other kinds of statements that we’ll see shortly are while statements, for statements, if statements, and import statements. (There are other kinds too!) An expression is a combination of values, variables, operators, and calls to functions. Expressions need to be evaluated. If you ask Python to print an expression, the interpreter evaluates the expression and displays the result.

Q.6 What are tokens in Python? How many types of tokens allowed in Python?

Ans: Tokens are the smallest unit of the program. There are following tokens in Python:

• Reserved words or Keywords
• Identifiers
• Literals Definition of all tokens may come. Which is not given
• Operators in this question bank.
• Punctuators

Q.7 What are operators? What is their function? Give examples of some unary and binary operators.
Ans:
“Operators are those symbols used with operands, which tells compiler which operation is to be done on operands.” in other words – “operators are tokens that trigger some computation/action when applied to variables and other objects in an expression.”

• Operators are of following types:
• Unary operators like (+) Unary Plus, (-) Unary Minus, not etc.
• Binary Operators like (+) addition, (*) multiplication, and etc.

Q.8 What is block/code block/suit in Python?
Ans:
Sometimes a group of statements is part of another statement of function. Such a group of one or more statements is called block or code-block or suit in python. e.g.

Q.9 What is the role of indentation in Python?
Ans:
Indentation plays a very important role in Python. Python uses indentation to create blocks of code. Statements at same indentation level are part of same block/suit. You cannot unnecessarily indent a statement; python will raise an error for that.

Q.10 How many types of strings are supported by Python?
Ans:
Python supports two types of strings:
(i) Single-line string That terminates in single line.
(ii) Multi-line String That stores multiple lines of text.

Skill Based Questions

Q.1 What will be the sizes of following constants?
(a) „\a‟ (b) “\a” (c) “Kumar\‟s” (d) „\”‟ (e) “it‟s”
Ans:
(a) 50 (b) 50 (c) 56 (d) 50 (e) 53
This screenshot is the output of the above question.

Q.2 How can you create multi-line strings in Python?
Ans:
We can create multi-line string by putting a backslash () at the end of line which allows you to continue typing in next line in same string.

Q.3 Which of the following are syntactically correct strings? State reason.
(a) ”Python is nice Language”
(b) „He called me “Friend!” when he came‟
(c) “Very Good‟
(d) „This is a good book‟
(e) “Namaste
(f) “I liked „Harry Potter‟ very much”

Ans: (a) Correct (b) Correct (c) Incorrect (d) Correct (e) Incorrect (f) Correct

Q.4 What is the error in following Python program with one statement?
print(“My name is : “, name)
suggest a solution
Ans:
Error is : “name ‘name’ is not defined”. And the solution is to declare the variable-name before this statement.