Comsci Revision Unit 3 (Computer Architecture)

What is the responsibility of the CPU in a computer?

What are the main components of the CPU?

What are the key features of Von Neumann architecture?

• Concept of CPU and direct memory access by the CPU

• Storage of programs and data in memory

• Execution of stored programs in sequential order

• All of the above

What operations does the Arithmetic and Logic Unit (ALU) perform?

What are the functions of the Control Unit?

What are registers in the CPU?

Fill in the Blanks

Types of system buses and their functions

• Control bus (bidirectional and carries control signals)
  Address bus (unidirectional and carries addresses)
  Data Bus (bidirectional and carries data)

• Control bus (bidirectional and carries control signals)
  Address bus (bidirectional and carries addresses)
  Data Bus (bidirectional and carries data)

• Control bus (unidirectional and carries control signals)
  Address bus (unidirectional and carries addresses)
  Data Bus (bidirectional and carries data)

What are the steps in the Fetch-Decode-Execute Cycle?

Which of the following affects the performance of the CPU?

• clock speed - the number of cycles a CPU can perform each second (GHz)

• cores - processor within a CPU, can only work one instruction at a time

• cache memory - fast memory located in CPU, used to store temporary copies of the data in the most commonly accessed RAM locations

• RAM AND ROM - types of computer memory, with RAM used for temporary data storage during operation and ROM storing permanent data and instructions that remain intact even when the computer is powered off