Q.n. 4 Difference Between Static Memory and Dynamic Memory

Static Memory: Static Memory devices are semiconductor memories in which the stored data will remain permanently stored as long as power is applied without the need of periodically rewriting or refreshing the data into the memory. The basic element of this storage is a flip flop or a gate. RAM, Punched Card and Tape are examples of Static Memory.

Dynamic Memory: Dynamic Memory devices are semiconductor memories in which the stored data will not remain permanently stored, even with power applied unless the data is periodically rewritten into

the memory. Data is stored as charge on capacitors. The charge on capacitor has to be periodically refeshed in order to prevent it from leaking away. DRAM & Charge Coupled Device (CCD) are example of Dynamic Memory.

STATIC MEMORY ALLOCATION	DYNAMIC MEMORY ALLOCATION
Memory is allocated before the execution of the program begins. (During Compilation)	Memory is allocated during the execution of the program.
No memory allocation or deallocation actions are performed during Execution.	Memory Bindings are established and destroyed during the Execution.
Variables remain permanently allocated.	Allocated only when program unit is active.
Implemented using stacks and heaps.	Implemented using data segments.
Pointer is needed to accessing variables.	No need of Dynamically allocated pointers.
Faster execution than Dynamic.	Slower execution than static.
More memory Space required.	Less Memory space required.