what is CPU clock cycle means???

CPU clock cycles varies as computers configuration. For example: IF Yours processor speed is 2.4 GHz then the clock cycle of your CPU is ~4.17 * 10^-10 seconds The time it responds to each of the processes which you could see in the Task manager (Ctrl + Alt + Delete).

well every micro process or or cpu requires a clock input for execution...you can define a clock as a electronic signal which oscillates between up (say 1) and down (say 0)...now when ever the signal changes from one to zero or zero to one this is called edge triggering (positive or nagetive depending upon the type of change)..and each such triggers(either positive or nagetive, again depending upon the type of cpu :) ) the cpu to do some processing or work...and one such trigger is called a cpu cycle....total number of such cycles in a cpu are called frequency that is what determines the speed of cpu...means a 1 GHz cpu has a clock that goes from high to low (low to high) approximately 1024*1024*1024 times..

the speed at which the microprocessor executes the instructions.every computer contains an internal clockthat regulates the rate at which instructions are executed and synchronize all the various computer components.the cpu requiresa fixed number of clock ticks i.e clock cycle to execute each instructions.the faster the clk the more number of instructions the cpu can execute per second

Clock cycle also called clock rate, the speed at which a microprocessor executes instructions. Every computer contains an internal clock that regulates the rate at which instructions are executed and synchronizes all the various computer components. The CPU requires a fixed number of clock ticks (or clock cycles) to execute each instruction. The faster the clock, the more instructions the CPU can execute per second. Clock speeds are expressed in megahertz (MHz) or gigahertz ((GHz). The internal architecture of a CPU has as much to do with a CPU's performance as the clock speed, so two CPUs with the same clock speed will not necessarily perform equally. Whereas an Intel 80286 microprocessor requires 20 cycles to multiply two numbers, an Intel 80486 or later processor can perform the same calculation in a single clock tick. (Note that clock tick here refers to the system's clock, which runs at 66 MHz for all PCs.) These newer processors, therefore, would be 20 times faster than the older processors even if their clock speeds were the same. In addition, some microprocessors are superscalar, which means that they can execute more than one instruction per clock cycle.

It is the one time period of ur cpu clock..... for example the time period of ur watch is 1 second... simalarly any digital device will be triggered by a clock.... the device will work only when the clock is triggered high or something like that....there can be level triggered or edge triggered but most probably edge triggered...hence clock is needed....the time period of that clock is one cpu clock cycle....