CA Quiz LU10

What does the CPU do when it fetches an instruction?

• Decode the instruction

• Perform arithmetic operations

• Read data from memory

• Write data to memory

Which type of registers are used to hold addresses?

• Data Registers

• General Purpose Registers

• Address Registers

• Condition Code Registers

What is the purpose of User-Visible Registers?

• Control the operation of the CPU

• Minimize main memory references

• Hold addresses

• Perform arithmetic operations

How many Control & Status Registers are considered essential?

• Two

• Three

• Four

• Five

What is the purpose of the Program Counter (PC) register?

• Contains a word of data to be written to memory

• Contains the address of a location in memory

• Contains the instruction most recently fetched

• Contains the address of an instruction to be fetched

Which technique is used to improve the accuracy of branch prediction by recording the history of conditional branch instructions?

• Prefetch Branch Target

• Branch Prediction

• Multiple Streams

• Loop Buffer

What is the purpose of Delayed Branching?

• Predict never taken

• Always assume that branch will be taken

• Prefetch branch target

• Automatically rearrange instructions within a program

How many stages are involved in a two-stage instruction pipeline?

• Three

• Four

• Five

• Six

What is the function of the Memory Buffer Register (MBR)?

• Contains the address of a location in memory

• Contains the instruction most recently fetched

• Contains a word of data to be written to memory

• Contains the address of an instruction to be fetched

Which register contains status information including Condition codes and Interrupt enable/disable?

• Instruction Register (IR)

• Program Status Word (PSW)

• Memory Address Register (MAR)

• Program Counter (PC)