An instruction for a hypothetical CPU is 1940 in hexadecimal. The "19" is the opcode. How many bits are used to represent the opcode in this architecture? Give your answer in bytes.

You are told 219 (in base 10) is 432 in some other base. What base is 432 written in?

Hint: the quadratic equation  has roots 

A LINUX program uses POSIX-compliant API methods (i.e. pthread_create, pthread_join, etc.) to create and synchronise 6 threads. How many PCBs does the OS need, to manage these threads' executions? 

Let  be a 2-digit number in base . What is  in base ?

Suppose 18-bit instructions are copied to a CPU's instruction register, and suppose that each instruction dedicates the first 6 bits for the "opcode", with the remaining bits for specifying a memory location. What is the total number of possible memory locations that could be referenced by these instructions?

Consider the following logical network built from AND, OR and NOT gates:

 Beskou die volgende logiese netwerk gebou met EN, OF en NIE hekke:

Which of the following is the simplest logical expression for the above network?

Watter een van die volgende is die eenvoudigste logiese uitdrukking for die netwerk hierbo?