OS | Test 1

What is NOT a main structural element of a computer system?

Which of the following element of a computer system controls the operation of the computer and performs its data processing functions?

This register specifies the location in memory for the next read or write

Complete the relationship concerning the memory systems: faster access time —

When a processor attempts to read a byte or word of memory, it firstly checks the:

Complete the relationship concerning the memory systems: greater capacity —

The processor contains a single data register, called:

At the beginning of each instruction cycle, the processor fetches an instruction from the memory. The address of the instruction is held in:

Which of the following registers are used by the processor to exchange data with input/output module?

Which of the following element of a computer system moves data between the computer and its external environment?

Which register contains the address of the next instruction to be fetched?

Which register contains the instruction most recently fetched?

When an I/O device completes an I/O operation, the device issues an interrupt signal to the processor and then:

The smaller, more expensive, faster memory is:

If the contents of a block in the cache are altered, then it is needed to save it back to main memory before replacing it. This is called:

Complete the relationship concerning the memory systems: greater capacity —

We have
Ts = average (system) access time
T1 = access time of M1 (e.g. cache)
T2 = access time of M2 (e.g. main memory)
T3 = access time of M3 (e.g. disk)

H1 = hit ratio, fraction of time reference is found in M1
H2 = hit ratio, fraction of time reference is found in M2

The average time to access an item in case the item in cache is:

Which register contains condition codes set by the processor hardware as the result of operations?

If the accessed word is not found in the faster memory, that is defined as a:

Which of the following element of a computer system stores data and programs?

The processor is executing 'Load AC from memory' instruction. Choose the correct micro-instructions:

The processor determined that there is a pending interrupt and sent an acknowledgement signal to the device that issued the interrupt. Then, the processor:

When the time required for the I/O operation is less than the time to complete the execution of instructions between write operations in the user program, it is:

We have
Ts = average (system) access time
T1 = access time of M1 (e.g. cache)
T2 = access time of M2 (e.g. main memory)
T3 = access time of M3 (e.g. disk)

H1 = hit ratio, fraction of time reference is found in M1
H2 = hit ratio, fraction of time reference is found in M2

The average time to access an item in case the item in cache is:

The type of memory is nonvolatile:

Which of the following provides for communication among elements of a computer system?