PCEP Bitwise Operations 2

Question 1

What is the result of `0b1010 & 0b1100` in Python?

Accepted Answer

0b1000

Answer

AND keeps only bits that are 1 in both operands: 1010 & 1100 = 1000 (decimal 8).

Question 2

Which expression uses the bitwise OR operator in Python?

Accepted Answer

x | y

Answer

The single pipe `|` is Python's bitwise OR; `||` and `or` are logical operators.

Question 3

What does `~0` evaluate to in Python?

Accepted Answer

-1

Answer

The bitwise NOT of 0 flips all bits, giving -1 in Python's two's complement integers.

Question 4

What is `7 ^ 7` in Python?

Accepted Answer

0

Answer

XOR of any value with itself always produces 0 because every bit cancels.

Question 5

What is the result of `1 << 4`?

Accepted Answer

16

Answer

Left-shifting 1 by 4 positions is equivalent to 2^4 = 16.

(PCEP) Certified Entry-Level Python Programmer Practice Test