CNIT 176 Exam 2 2026 Expert
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ALU (Arithmetic logic unit) - 🧠ANSWER ✔✔Performs calculations and
comparisons within CPU
CU (Control unit) - 🧠ANSWER ✔✔Performs fetch/execution cycle,
accesses program instructions and issues commands to the ALU, moves
data to and from CPU registers and other hardware components
Registers - 🧠ANSWER ✔✔small permanent storage locations within the
CPU, executes programs, receives signals from external devices
, PC (Program counter register) - 🧠ANSWER ✔✔Instruction pointer
IR (Instruction register) - 🧠ANSWER ✔✔Stores instruction that is fetched
from memory
Status register - 🧠ANSWER ✔✔Status of CPU and currently executing
programs, uses flags to track conditions like arithmetic, power failure,
internal errors
DRAM (Dynamic ram) - 🧠ANSWER ✔✔Most common, cheap, less
electrical power, smaller space, volatile
SRAM (Static ram) - 🧠ANSWER ✔✔Faster,expensive
ROM (Read only memory) - 🧠ANSWER ✔✔Used for the system BIOS
Flash memory - 🧠ANSWER ✔✔Inexpensive, nonvolatile, used in tablets,
phones, etc. Ex.) SSD
Fetch - 🧠ANSWER ✔✔Finds an instruction, load from memory into register
Execute - 🧠ANSWER ✔✔Performs operation that instruction requires
Bus - 🧠ANSWER ✔✔Group of electrical or optical conductors for carrying
signals from one location to another -- Physical connection that makes it
Verified | Ace the Test
ALU (Arithmetic logic unit) - 🧠ANSWER ✔✔Performs calculations and
comparisons within CPU
CU (Control unit) - 🧠ANSWER ✔✔Performs fetch/execution cycle,
accesses program instructions and issues commands to the ALU, moves
data to and from CPU registers and other hardware components
Registers - 🧠ANSWER ✔✔small permanent storage locations within the
CPU, executes programs, receives signals from external devices
, PC (Program counter register) - 🧠ANSWER ✔✔Instruction pointer
IR (Instruction register) - 🧠ANSWER ✔✔Stores instruction that is fetched
from memory
Status register - 🧠ANSWER ✔✔Status of CPU and currently executing
programs, uses flags to track conditions like arithmetic, power failure,
internal errors
DRAM (Dynamic ram) - 🧠ANSWER ✔✔Most common, cheap, less
electrical power, smaller space, volatile
SRAM (Static ram) - 🧠ANSWER ✔✔Faster,expensive
ROM (Read only memory) - 🧠ANSWER ✔✔Used for the system BIOS
Flash memory - 🧠ANSWER ✔✔Inexpensive, nonvolatile, used in tablets,
phones, etc. Ex.) SSD
Fetch - 🧠ANSWER ✔✔Finds an instruction, load from memory into register
Execute - 🧠ANSWER ✔✔Performs operation that instruction requires
Bus - 🧠ANSWER ✔✔Group of electrical or optical conductors for carrying
signals from one location to another -- Physical connection that makes it
