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Computer Architecture

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Questions and Answers

What is the function of the control unit in a computer?

To move data among different units of the machine

To generate relevant timing and control signals to all operations in the computer (correct)

To store the result at the destination

To perform arithmetic and logical operations

Which phase of the instruction cycle involves fetching the instruction to be executed and decoding it?

Decode phase

Fetch phase (correct)

Memory read phase

Execute phase

What are data movement instructions used for in computer architecture?

To move data among the different units of the machine (correct)

To generate timing and control signals

To perform arithmetic and logical operations

To store the result at the destination

What is the purpose of the execute cycle in an instruction execution process?

Executing or processing the operands in ALU and storing the result at the destination Signup and view all the answers

What happens in step 2 of the instruction execution process in the control unit?

Incrementing PC Signup and view all the answers

Match the following phases of the instruction cycle with their descriptions:

Fetch Cycle = Includes fetching instruction to be executed and decoding of instruction Decode Phase = Involves moving the instruction to the decoder for decoding purpose Execute Cycle = Includes executing or processing the operands in ALU and storing the result at the destination Instruction Fetch Phase = Comprises steps 1 to 3 in the instruction execution process Signup and view all the answers

Match the following components with their functions in the control unit:

PC (Program Counter) = Sends content to MAR for memory reading and gets incremented after memory read MAR (Memory Address Register) = Receives content from PC for memory reading and waits for memory function to be completed MBR (Memory Buffer Register) = Stores the instruction after memory read IR (Instruction Register) = Moves to decoder for decoding purpose Signup and view all the answers

Match the following types of instructions with their purposes in computer architecture:

Data Movement Instructions = Used to move data among different units of the machine Arithmetic and Logical Instructions = Involved in processing operands in ALU Sequencing Instructions = Related to the procedure for an instruction execution one by one sequentially inside CPU Input/output Instructions = Relating to input/output operations in the computer Signup and view all the answers

Match the following phases of the instruction execution process with their descriptions:

Memory Read Phase = Sending the content of PC to MAR for memory reading and waiting till Memory function is completed Increment Phase = Incrementing the content of PC after memory read Instruction Fetch Phase = Term for steps 1 to 3 in the instruction execution process Execute Phase = Operation takes place according to the operand field of IR Signup and view all the answers

Match the following functions of the control unit with their descriptions:

Generate Relevant Timing and Control Signals = Function of the control unit to all operations in the computer Timing Control = Control unit's function to generate relevant timing signals to all operations in the computer Operation Control = Control unit's function to generate relevant control signals to all operations in the computer Signal Generation = Control unit's function to generate relevant timing and control signals to all operations in the computer Signup and view all the answers