CPU and Bit Manipulation

Explain the difference between logical and arithmetic right shift operations.

• Logical right shift fills with ones; arithmetic right shift fills with zeros.

• Logical right shift fills with zeros; arithmetic right shift fills with the sign bit.

• Both logical and arithmetic right shifts fill with the sign bit.

• Logical right shift is used for signed numbers; arithmetic right shift is used for unsigned numbers.

What is the outcome of the bitwise AND operation between 1101 and 1011?

• 1100

• 1111

• 1001

• 1010

How does the bitwise OR operator work? Provide an example.

• The bitwise OR of 5 and 3 is 7.

• The bitwise OR of 5 and 3 is 4.

• The bitwise OR of 5 and 3 is 6.

• The bitwise OR of 5 and 3 is 8.

What is the purpose of the XOR operator in bit manipulation?

• The XOR operator is used to invert bits.

• The XOR operator is used to compare bits and return 1 for differing bits and 0 for identical bits.

• The XOR operator shifts bits to the left.

• The XOR operator adds two bits together.

Describe how memory addressing works in a computer system.

• Memory addressing allows the CPU to access specific locations in memory using unique numerical addresses.

• Memory addressing does not involve the CPU in accessing memory locations.

• Memory addressing is solely based on the size of the data being stored.

• Memory addressing uses physical addresses only, ignoring virtual memory.

What is the significance of the fetch-decode-execute cycle?

• It is a method for storing data in memory.

• It describes how to design a computer's hardware.

• It is a technique for optimizing software performance.

• It is the core process that enables a CPU to execute instructions.

In the fetch-decode cycle, what happens during the fetch stage?

• The CPU executes the instruction immediately.

• The CPU stores the instruction in a cache.

• The CPU sends the instruction to the output device.

• The CPU retrieves the next instruction from memory.

What is the role of the instruction register in the fetch-decode cycle?

• The instruction register stores data temporarily during execution.

• The instruction register executes the current instruction.

• The instruction register stores the current instruction being executed.

• The instruction register manages memory allocation for instructions.

How does the CPU determine the memory address of the next instruction?

• The CPU calculates the next instruction address based on the current clock speed.

• The CPU uses the Arithmetic Logic Unit (ALU) to find the next instruction address.

• The CPU retrieves the next instruction address from the hard drive.

• The CPU determines the memory address of the next instruction using the Program Counter (PC).

What is the effect of a bitwise NOT operation on the binary number 0110?

• 1001

• 0110

• 1000

• 1110