Day 4

Which operator has highest precedence in python and what is its associativity?

• Exponent(**), Left-to-Right

• Exponent(**), Right-to-left

• Multiplication- left-to-right

• Multiplication-Right-to-Left

Answer explanation

Exponent operator (**) has the highest precedence in python with associativity from left to right

print(6 & 2)

what will be the result of the following?

• 3

• 2

• 1

• 4

Answer explanation

6 - 110

3 - 011

----------

&-010 => 2

print(7 | 2)

what will be the output?

• 2

• 6

• 7

• 8

Answer explanation

7 - 111

2 - 010

--------

| - 1 1 1 => 7

--------

a = 1 1 0 1

b = 1 0 1 0

what will be a^b?

• 1111

• 0111

• 1110

• 0000

Answer explanation

In bitwise xor operation, the result will be 0 if the operands are same and 1 if the operands are diferent.

a = 5 (101 in binary)

what will be a<<3, when is it is 32-bit representation?

• 20

• 40

• 80

• 120

Answer explanation

in 16-bit representation, 5 in binary can be represented as:

5 => 0000000000000101

5 << 3 will be

0000000000101000

which is equal to 40

a = 5

b = 3

a-=2

print(a is not b)

• true

• True

• False

• TRUE

Answer explanation

a becomes 3 when a = a-2

b = 3.

so, both will share same memory space. Hence a is not b will return False

print("hello" is str)

what will be the output?

• True

• False

• Error

Answer explanation

"is" operator cannot be used with string literals

Error is :

SyntaxWarning: "is" with a literal. Did you mean "=="? print("hello" is str)

t = (1,2,3)

t2 = (1,2,3)

print(t is t2)

Output: True

Why is the output True?

• tuple is immutable

• both t and t2 refers same object

• tuples are mutable

Answer explanation

tuples are immutable. Adding, removing, and changing elements are not possible.

Hence, when two tuples are created with same elements same object is referenced.

What is the output of the following:

a = 10 - (5 + 3) % 2 // 5 % 2 * 2 ** 2 + 1 * 1

print(a)

(TAKE YOUR OWN TIME)

• 10

• 11

• 0

• 1

Li = [ 1 , 2 , 3 , 4 , 5]

print(1 in Li)

What will be the output?

• True

• False

• true

• false