Chapter – 2: PYTHON FUNDAMENTALS
Very Short answer Type
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
(b)
a=12 (c)
print(“x=”x) Print temp b = a + b
print( a And b)
(d)
a, b, c=2, 8, 4 (e) x = 23 (f)
else = 21-4
print(a, b, c) 4 = x c, b, a = a, b, c
print(a; b; c)
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
(b) a=input(“Value: “) (c)
print(x = y = 5) print(x,y) b = a/2
print( a, b)
Ans: (a) Name 'x' is not defined.
(b)
Unsupported operand type(s) for /: 'str' and 'int'.
(c)
Invalid Syntax.
Short Answer Type
Questions
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, forstatements, 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
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
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
Q.5
Ans:
Output: 17 5
Q.6
What will be
the output of the following code:
Ans:
Output: Hari , you are 18 now but You will be 19
next year
Q.7
Write a
Program to obtain temperature in Celsius and convert it into Fahrenheit using
formula –
C
X 9/5 + 32 = F
Ans: 
Q.8
Predict
output:
Ans: Output: 4 6 8
Q.9
WAP to read
todays date (only date Part) from user. Then display how many days are left in
the current month.
Ans:
Q.10
WAP to print
the area of circle when radius of the circle is given by user.
Ans:
Q.11
WAP to print
the volume of a cylinder when radius and height of the cylinder is given by
user.
Ans:
Q.12
WAP that
asks your height in centimeters and converts it into foot and inches.
Ans:
Q.13
WAP to find
area of a triangle.
Ans:
Q.14
WAP to
calculate simple interest.
Ans:
Q.15
WAP to read a number in n and prints n2,
n3, n4 Ans:
