IB Computer Science Computer
Organization Revision Exam And
Answers Scored A+.
CPU - Answer A central processing unit (CPU) is the electronic circuitry within a computer that carries
out the instructions of a computer program by performing the basic arithmetic, logical, control and
input/output (I/O) operations specified by the instructions.
ALU - Answer an arithmetic logic unit (ALU) is a digital circuit that performs arithmetic and bitwise
logical operations on integer binary numbers.
CU - Answer The control unit is a component of a computer's central processing unit (CPU) that directs
operation of the processor.
memory address register - Answer holds the memory location of data that needs to be accessed
memory data register - Answer contains the data to be stored in the computer storage
primary memory - Answer a computer system's volatile storage mechanism. It may be random access
memory (RAM), cache memory and data buses but is mainly associated with RAM.
RAM - Answer (random access memory) is the place in a computer where the operating system,
application programs, and data in current use are kept so that they can be quickly reached by the
computer's processor.
ROM - Answer read only memory: a storage device that holds data permanently and cannot in normal
circumstances be altered by the programmer
cache memory - Answer a small area of memory in a computer that can be accessed very quickly
Organization Revision Exam And
Answers Scored A+.
CPU - Answer A central processing unit (CPU) is the electronic circuitry within a computer that carries
out the instructions of a computer program by performing the basic arithmetic, logical, control and
input/output (I/O) operations specified by the instructions.
ALU - Answer an arithmetic logic unit (ALU) is a digital circuit that performs arithmetic and bitwise
logical operations on integer binary numbers.
CU - Answer The control unit is a component of a computer's central processing unit (CPU) that directs
operation of the processor.
memory address register - Answer holds the memory location of data that needs to be accessed
memory data register - Answer contains the data to be stored in the computer storage
primary memory - Answer a computer system's volatile storage mechanism. It may be random access
memory (RAM), cache memory and data buses but is mainly associated with RAM.
RAM - Answer (random access memory) is the place in a computer where the operating system,
application programs, and data in current use are kept so that they can be quickly reached by the
computer's processor.
ROM - Answer read only memory: a storage device that holds data permanently and cannot in normal
circumstances be altered by the programmer
cache memory - Answer a small area of memory in a computer that can be accessed very quickly
