I have an issue with this one: Assume x has type int . Is the expression x<<32 ...

Defined for all values of x

Defines for some values of x

Defined for no values of x

(chose second answer) Wrong answer

Shifting (in either direction) by an amount equalling or exceeding the bitwidth of the promoted operand is an error in C99.

So according to Wikipedia: https://en.wikipedia.org/wiki/C_data_types

int signed signed int Basic signed integer type. Capable of containing at least the [−32,767, +32,767] range.[3][a]

So a minimum of 16 bits is used for int, but no maximum is specified. Thus, if my C compiler on my 64-bit architecture uses 64 bits for int, this is perfectly allowed by the specification and my answer is correct.