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In computing, a process is the instance of a computer program that is being executed by one or many threads. It contains the program code and its activity. Depending on the operating system (OS), a process may be made up of multiple threads of execution that execute instructions concurrently. Which part of the CPU performs the executes instructions?The actual mathematical operation for each instruction is performed by a combinational logic circuit within the CPU’s processor known as the arithmetic–logic unit or ALU. In general, a CPU executes an instruction by fetching it from memory, using its ALU to perform an operation, and then storing the result to memory. How does the CPU decide which process to execute?CPUs are extremely fast, so if a program is processed for even a short time it can do quite a lot. The OS decides the best way to swap between running, runnable and waiting processes. It controls which process is being executed by the CPU at any point in time, and shares access to the CPU between processes. What is it called when a computer executes one instruction at one time? An SISD computing system is a uniprocessor machine capable of executing a single instruction, which operates on a single data stream (see Figure 2.2). In SISD, machine instructions are processed sequentially; hence computers adopting this model are popularly called sequential computers. What happens when a program is executed? Once the program begins execution it is entirely copied to the RAM. Then the processor retrive a few instructions (it depends on the size of the bus) at a time, puts them in registers and executes them. When a CPU executes the instructions in a program it is engaged in what process?the fetch-decode-execute cycle How does a program instruction execute?How Does a Program Run? The CPU runs instructions using a “fetch-execute” cycle: the CPU gets the first instruction in the sequence, executes it (adding two numbers or whatever), then fetches the next instruction and executes it, and so on. When instructions are being executed?The program which is to be executed is a set of instructions which are stored in memory. The central processing unit (CPU) executes the instructions of the program to complete a task. The major responsibility of the instruction execution is with the CPU. The instruction execution takes place in the CPU registers. How does an operating system execute a program? When you double-click the program, the operating system “launches” the program, doing the housekeeping steps of allocating an area of memory within RAM for the program, loading the first section of the program’s machine code into that memory, and finally directing the CPU to start running that code. How does the CPU track the next instruction to be executed? A program counter (PC) is a CPU register in the computer processor which has the address of the next instruction to be executed from memory. It is a digital counter needed for faster execution of tasks as well as for tracking the current execution point. What executes a program?A computer processor executes an instruction, meaning that it performs the operations called for by that instruction. An executable is a file that contains a program – that is, a particular kind of file that is capable of being executed or run as a program in the computer. What is used for execution of a program?System memory is used for execution of a program. When a processor fetches an instruction of the executing program the address of the next instructions gets stored in?The CPU’s program counter is set to the memory location where the first instruction in the program has been stored, and execution begins. The program is now running. In a program, each machine code instruction takes up a slot in the main memory. These slots (or memory locations) each have a unique memory address. What do you mean by execute of instruction? In a computer instruction set architecture (ISA), an execute instruction is a machine language instruction which treats data as a machine instruction and executes it. It can be considered a fourth mode of instruction sequencing after ordinary sequential execution, branching, and interrupting. How is the execution context of a process used by the OS? How is the execution context of a process used by the OS? The execution context, or process state, is the internal data by which the OS is able to supervise and control the process. This internal information is separated from the process, because the OS has information not permitted to the process. When the process is executing instructions it is called?The correct answer is option 1. Key Points A process is the instance of a computer program that is being executed. It contains the program code and its activity. A process may be made up of multiple threads of execution that execute instructions concurrently. Program in execution is called process.
Does the CPU execute instructions in order to process data?The CPU executes a program that is stored as a sequence of machine language instructions in main memory. It does this by repeatedly reading, or fetching, an instruction from memory and then carrying out, or executing, that instruction.
What is it called when the CPU carries out the action of an instruction?What is it called when the CPU carries out the action of an instruction? When the CPU is carrying out the action of an instruction it is executing it.
What are the four steps CPUs use to execute instructions?Four steps of the machine cycle. Fetch - Retrieve an instruction from memory.. Decode - Translate the retrieved instruction into computer commands.. Execute - Execute the computer commands.. Store - Send and write the results back in memory.. |
When a CPU executes the instructions in a program it is engage in what process?
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