A) Yes

  Case is always significant.

D) None of the mentioned

 Identifiers can be of any length.

D) None of the mentioned

All the statements will execute successfully but at the cost of reduced readability.

B) 1st_string

Variable names should not start with a number.

A) they are used to indicate a private variables of a class

As Python has no concept of private variables, leading underscores are used to indicate variables that must not be accessed from outside the class.

A) eval

eval can be used as a variable.

D) None of the mentioned

True, False and None are capitalized while the others are in lower case.

A) unlimited length

Variable names can be of any length.

B) a b c = 1000 2000 3000

Spaces are not allowed in variable names.

B) in

in is a keyword.

B) X**y

In python, power operator is x**y i.e. 2**3=8.

B) //

When both of the operands are integer then python chops out the fraction part and gives you the round off value, to get the accurate answer use floor division.

This is floor division. For ex, 5/2 = 2.5 but both of the operands are integer so answer of this expression in python is 2. To get the 2.5 answer, use floor division.

A) i,ii,iii,iv,v,vi

For order of precedence, just remember this PEMDAS (similar to BODMAS).

B) 1

Modulus operator gives the remainder. So, 22%3 gives the remainder, that is, 1.

B) False

You can’t perform mathematical operation on string even if the string is in the form: ‘1234…’.

A) Left to Right

C) 3

First this expression will solve 1**3 because exponential has higher precedence than multiplication, so 1**3 = 1 and 3*1 = 3. Final answer is 3.

A) Addition and Subtraction

“Addition and Subtraction” are at the same precedence level.

Similarly, “Multiplication and Division” are at the same precedence level.

However, Multiplication and Division operators are at a higher precedence level than Addition and Subtraction operators.

A) True

D) Parentheses

Just remember: PEMDAS, that is, Parenthesis, Exponentiation, Division, Multiplication, Addition, Subtraction. Note that the precedence order of Division and Multiplication is the same.

Likewise, the order of Addition and Subtraction is also the same.

B) False

Neither of 0.1, 0.2 and 0.3 can be represented accurately in binary.

The round off errors from 0.1 and 0.2 accumulate and hence there is a difference of 5.5511e-17 between (0.1 + 0.2) and 0.3.

C) k = 2 + 3l

l (or L) stands for long.

C) Float

Infinity is a special case of floating point numbers. It can be obtained by float(‘inf’).

A) -5

~x is equivalent to -(x+1).

A) +5

~x is equivalent to -(x+1).

~~x = – (-(x+1) + 1) = (x+1) – 1 = x

~~x is equivalent to x

Extrapolating further ~~~~~~x would be same as x in the final result. In the question, x value is given as 5 and “~” is repeated 6 times. So, the correct answer for “~~~~~~5” is 5.

D) x = 03964

Numbers starting with a 0 are octal numbers but 9 isn’t allowed in octal numbers.

A) 1

cmp(x, y) returns 1 if x > y, 0 if x == y and -1 if x < y.

D) float(’12+34′)

‘+’ cannot be converted to a float.

D) Value depends on Python version

The behavior of the round() function is different in Python 2 and Python 3. In Python 2, it rounds off numbers away from 0 when the number to be rounded off is exactly halfway through.

round(0.5) is 1 and round(-0.5) is -1 whereas in Python 3, it rounds off numbers towards nearest even number when the number to be rounded off is exactly halfway through.

See the below output. Here’s the runtime output for Python version 2.7 interpreter.

$ python

Python 2.7.17 (default, Nov 7 2019, 10:07:09)

>>> round(0.5)

1.0

>>> round(-0.5)

-1.0

>>>

In the above output, you can see that the round() functions on 0.5 and -0.5 are moving away from 0 and hence “round(0.5) – (round(-0.5)) = 1 – (-1) = 2”

Here’s the runtime output for Python version 3.6 interpreter.

$ python3

Python 3.6.8 (default, Oct 7 2019, 12:59:55)

>>> round(0.5)

0

>>> round(-0.5)

0

>>> round(2.5)

2

>>> round(3.5)

4

>>>

In the above output, you can see that the round() functions on 0.5 and -0.5 are moving towards 0 and hence “round(0.5) – (round(-0.5)) = 0 – 0 = 0“. Also note that the round(2.5) is 2 (which is an even number) whereas round(3.5) is 4 (which is an even number).

D) 7

^ is the Binary XOR operator.

B) x = 25

B) True

 Variables are not statically typed in Python, as they are in some other programming languages.

C) int x=7

The correct way of declaring and initializing a variable, x with the value 7 is x=7.

D) 65536

The statement is equivalent to 2^16. So, Option D is correct.

D) Variable name can begin with number.

Variable name can not begin with the number, it can only begin with a letter or underscore.

A) 4

Floor Division operator “//” – The division of operands where the result is the quotient in which the digits after the decimal point are removed.

So in this case we get 4 as the answer. So, Option A is correct.

D) 5var

5var is not a valid variable name in python.

D) None of the above

In python, the Identifier can be of any length. So, Option D is correct.

A) None Of the below

All declarations will execute successfully but at the expense of low readability.

B) 2.0

Python rounds off numbers away from 0 when the number to be rounded off is exactly halfway through.

round(0.5) is 1 and round (-0.5) is -1 So, 1-(-1)=2.0

A) The program will loop indefinitely

This code loops while number is less than or equal to 5.

number only increments if it is less than 5, and it's originally set to 5, so 'number' never changes.

B) 9

This loop executes 3 times. After the first loop sum = 1 and counter = 3, after the second loop sum = 4 and counter = 5, and after the third loop sum = 9 and counter = 7.

D) 16

This adds up the numbers in values and prints the sum.

A) Number: 10

Since this while loop continues while number is less than or equal to 10, the last iteration of the loop will print "Number: 10".

B) -4 -3 -2 -1 0

The value of x is incremented before it is printed, so the first value printed is -4.

B) var1 = 0, var2 = -2

This loop will execute two times, so var1 will be 0 and var2 will be -2 when the loop is exited.

D) 20

The outer loop will iterate 4 times and the inner loop will iterate 5 times. 4 times 5 = 20.

A) n starts at 10 and is incremented by 1 each time through the loop, so it will always be positive.

The loop will run as long as n is positive. In this case, we can see that n will never become non-positive, so it will run infinitely.

A) a for-loop or a while-loop

Although you do not know how many iterations you loop will run before the program starts running, once you have chosen your random integer, Python knows exactly how many iterations the loop will run, so either a for-loop or a while-loop will work.

C) Current Letter : h

Because continue sends the loop to the next iteration at h, it will not print "Current Letter: h".

A) 0

D) 3

C) Both of the above

C) 100

A) Entry control loop

B) while loop

B) No

B) break

D) None of the above

B) 2

A) 0

B) colon

B) while(1):

D) None of the above

D) 1 and 2

C) do while loop

A) for loop

A) 0

D) None of the above

D) 0