Hackerrank Scalar Types and Operators 4

Question 1

What is the result of `5 & 3` in Python?

Accepted Answer

1

Answer

Bitwise AND: `5` is `101` and `3` is `011`; AND gives `001` which equals `1`.

Question 2

What does `5 | 3` evaluate to?

Accepted Answer

7

Answer

Bitwise OR: `101 | 011` = `111` = `7`.

Question 3

Which expression correctly checks if `x` is between 1 and 10 inclusive in Python?

Accepted Answer

All of the above

Answer

All three forms are valid Python; the chained comparison `1 <= x <= 10` is syntactic sugar for the explicit `and` form.

Question 4

What is the result of `~5` in Python?

Accepted Answer

-6

Answer

The bitwise NOT `~n` returns `-(n + 1)` in Python due to two's complement representation; `~5 = -6`.

Question 5

What does `3 << 2` evaluate to?

Accepted Answer

12

Answer

Left shift by 2 multiplies by `2²`; `3 * 4 = 12`.

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