DS – Memory Allocation

Static v/s Dynamic memory:

  • Applications are used to store and process the information.
  • We use variables to store the data.
  • We allocate memory to variables in 2 ways

Note the following:

  • It is impossible to allocate memory at compile time.
  • Compiler check whether the program is syntactically correct or not.
  • If the program follows syntax rules, then compiler converts the source code into machine code.
  • Compiler is not responsible for allocating the memory.
  • Memory allocation to variables only at runtime either it is Static or Dynamic

Static memory:

  • Allocate Fixed size of memory is called Static Memory.
  • Primitive variables have fixed memory.

Static Memory allocate to Arrays, Strings and Structures:

  • Arrays and Strings are called Derived data types.
  • Structures are called User defined data types.
  • We allocate memory to these types in both the ways.

The following diagram represents static memory allocation:

Dynamic memory:

  • The memory block size can modify after allocation.
  • We use pointer type variables to allocate dynamic memory.
  • Pointer stores memory block address of any size.
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