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Computer Registers and Control Instructions Quiz

12 Questions

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Computer Registers and Control Instructions Quiz

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Questions and Answers

What is responsible for determining the specific output for the bus lines?

Address register

Selection registers (correct)

Output register

Memory register

What happens when the LD input of a register is enabled?

The clock transition occurs

Increment operation is achieved

Data is received from the bus (correct)

Output device receives information

Which bits of AR or PC are set to 0's when applied to the common bus?

Four least significant bits

Four most significant bits (correct)

Eight most significant bits

Eight least significant bits

What does OUTR do in the common bus system?

Receives information from the bus (D) Signup and view all the answers

How is the increment operation achieved in the common bus system?

By enabling the count input of the counter (C) Signup and view all the answers

What purpose does a single register for the address serve in the system?

Eliminates the need for an address bus (A) Signup and view all the answers

What is the function of the Program Counter (PC) in a computer?

Hold the address of the next instruction to be read from memory after the current instruction is executed (B) Signup and view all the answers

Why does a branch instruction in a computer program require the transfer of the address part to the Program Counter (PC)?

To transfer to a nonconsecutive instruction (C) Signup and view all the answers

What happens during a memory read cycle in a computer system?

Information is transferred between registers and memory (D) Signup and view all the answers

Why is a common bus system more efficient for transferring information in a computer with many registers?

It connects all registers and memory outputs for easier information transfer (D) Signup and view all the answers

In a basic computer system, what does the control unit primarily do?

Read an instruction from memory and execute it (B) Signup and view all the answers

Why is a counter needed in computer instructions sequencing?

To calculate the address of the next instruction after execution of the current one (A) Signup and view all the answers