Question 1

Question 1Aashna has written following code :a = 5
b = '5'
c = "5"
d = 5.0(a) What are the data types of a, b, c, d ?(b) Are a, b, c, d storing exactly the same values ? Why/why not ?(c) What will be the output of following code based on values of a, b, c and d ?print a == bprint b == cprint a == d(d) Discuss the reasons behind the output of part (c).

Accepted Answer

(a) The data types are as follows:aintbStringcStringdfloat(b) No, a, b, c, and d are not storing exactly the same values. While the values of b and c look like integers (numerical 5), they are enclosed within quotes, making them strings. On the other hand, a is an integer number, and d is a floating-point number with a decimal point.So, although they all represent the number 5, they are stored as different data types.(c) The output of the following code will be :False
True
True
(d) The reasons behind the output of part c are as follows:1. print a == bThis comparison checks if the value of a is equal to the value of b. Even though the values of a and b are both 5, they are not of the same data type (int vs. str). Python strictly checks for both value and type equality in this case, so the comparison evaluates to False.2. print b == cThis comparison checks if the value of b is equal to the value of c. Since both b and c are strings with the same content ("5"), the comparison evaluates to True.3. print a == dThis comparison checks if the value of a is equal to the value of d. Although they have different data types (int vs. float), their numerical values are the same (both represent 5). Python performs type coercion in this case and considers them equal, so the comparison evaluates to True.

Question 2

Question 2Anant has written following expressions in Python 2.7 :a = - 4 % 1.5
b = - 4 // 1.5
c = 4.0 / 5
d = 4 / 5(a) Find out the values stored by a, b, c and d.(b) What are the datatypes of a, b, c and d ?(c) Why are the values of c and d not the same.

Accepted Answer

(a) The values stored in a, b, c, d are as follows:VariableValueReasona-0.5Remainder of -4 divided by 1.5 is -0.5b-3.0Floor division of -4 by 1.5 is -3.0 as floor division divides and truncates the fractional part from the result.c0.8Division of 4.0 by 5 is 0.8, which is a floating-point valued0Division of 4 by 5 is 0, and the fractional part is truncated(b) The data types of a, b, c and d are as follows:VariablesDatatypesafloatbfloatcfloatdint(c) The values of 'c' and 'd' are not the same because of the difference in the division operation performed in each case:'c' is the result of dividing two floating-point numbers, which preserves the decimal point and gives a floating-point result. 'd' is the result of dividing two integers, which truncates the fractional part and gives an integer result.

Question 3

Question 1Which statement/function will you use to display something on screen ?DisplayprintPRINTdisplay

Accepted Answer

printReason — The print statement is used to display something on screen.

Question 4

Question 2Which statement/function will you use to get value for a variable from keyboard ?getcinraw_inputraw_in

Accepted Answer

raw_inputReason — The raw_input function is used to get value for a variable from keyboard.

Question 5

Question 3Which of these is not a Python data type ?intlongfloatNUMBER

Accepted Answer

NUMBERReason — NUMBER is not a Python data type. Numbers are stored using int, float and long data types.

Question 6

Question 4In the following code a = '5'. a is a ............... :intstringfloatnumber

Accepted Answer

stringReason — A string literal is always enclosed in single quotes or double quotes.

Question 7

Question 5What is the output of following code ?print 8 >= 8
8 >= 8FalseTrueError

Accepted Answer

TrueReason — a >= b compares a and b and returns true if a is greater than or equal to b, else returns false. Since 8 is equal to 8, the given expression results in 'true'.

Question 8

Question 6What is the output of following code ?print "8 >= 8"
8 >= 8FalseTrueError

Accepted Answer

8 >= 8Reason — Since 8 >= 8 is enclosed in quotes, it is treated as a String and printed on the output terminal as it is.

Question 9

Question 7What will be the output of following code ?print(8 >= 8)
8 >= 8FalseTrueError

Accepted Answer

TrueReason — The given expression (8 >= 8) results in true as 8 is equal to 8. Thus, 'true' is printed on the output terminal.

Question 10

Question 8What will be the output ofprint 3*2**2
81183612

Accepted Answer

12Reason — The given expression 3*2**2 is evaluated as follows:= 3 * 2 ** 2= 3 * 4 (Since exponentiation (**) has higher precedence than multiplication (*))= 12Thus, 12 is printed as output.

Question 11

Question 9What will be the output ofprint (3*2)**2
81183612

Accepted Answer

36Reason — The given expression (3*2)**2 is evaluated as follows:= (3 * 2) ** 2= 6 ** 2 (Since parentheses has higher precedence than exponentiation (**))= 36Thus, 36 is printed as output.

Question 12

Question 10Which of the following has the highest precedence in an expression ?Exponentiation (**)Multiplication (*)Division (/)Parenthesis (())

Accepted Answer

Parenthesis (())Reason — Parenthesis (()) has the highest precedence in an expression.

Question 13

Question 1What are tokens in Python ? How many types of tokens are allowed in Python ? Examplify your answer.

Accepted Answer

The smallest individual unit in a program is known as a Token. Python has following tokens:Keywords — Examples are import, for, in, while, etc.Identifiers — Examples are MyFile, DS, DATE9777, etc.Literals — Examples are "abc", 5, 28.5, etc.Operators — Examples are +, -, >, or, etc.Punctuators — ' " # () etc.

Question 14

Question 2How are keywords different from identifiers?

Accepted Answer

Keywords are reserved words carrying special meaning and purpose to the language compiler/interpreter. For example, if, elif, etc. are keywords. Identifiers are user defined names for different parts of the program like variables, objects, classes, functions, etc. Identifiers are not reserved. They can have letters, digits and underscore. They must begin with either a letter or underscore. For example, _chk, chess, trail, etc.

Question 15

Question 3What are literals in Python ? How many types of literals are allowed in Python ?

Accepted Answer

Literals are data items that have a fixed value. The different types of literals allowed in Python are:String literalsNumeric literalsBoolean literalsSpecial literal NoneLiteral collections

Question 16

Question 4What are operators ? What is their function ? Give examples of some unary and binary operators.

Accepted Answer

Operators are tokens that trigger some computation/action when applied to variables and other objects in an expression.Unary plus (+), Unary minus (-), Bitwise complement (~), Logical negation (not) are a few examples of unary operators.Examples of binary operators are Addition (+), Subtraction (-), Multiplication (*), Division (/).

Question 17

Question 5What all components can a Python program contain ?

Accepted Answer

A Python program can contain various components like expressions, statements, comments, functions, blocks and indentation.

Question 18

Question 6What are data types ? How are they important ?

Accepted Answer

Data types are used to identify the type of data a memory location can hold and the associated operations of handling it.The data that we deal with in our programs can be of many types like character, integer, real number, string, boolean, etc. hence programming languages including Python provide ways and facilities to handle all these different types of data through data types. The data types define the capabilities to handle a specific type of data such as memory space it allocates to hold a certain type of data and the range of values supported for a given data type, etc.

Question 19

Question 7How many integer types are supported by Python ? Name them.

Accepted Answer

Two integer types are supported by Python. They are:Integers (signed)Booleans

Question 20

Question 8Write a program to input a number n and print n, n2, n3.

Accepted Answer

Solutionn = int(input("Enter n: "))
n2, n3 = n ** 2, n ** 3
print("n =", n)
print("n^2 =", n2)
print("n^3 =", n3)OutputEnter n: 2
n = 2
n^2 = 4
n^3 = 8

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