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The various memory allocation functions are described below:
(i) malloc( ): It is a memory allocation function that assigns requested size of bytes and returns a pointer to the first byte of the allocated space. The malloc function returns a pointer of type void so we can allocate it to any type of pointer.
(ii) calloc( ): It is another memory allocation function that assigns space for an array of elements, initializes them to zero and then returns a pointer to the memory. This function is normally used for request memory space at run time. Whereas malloc allocates a single block of storage space, calloc allocates multiple block of storage, each of the similar size, and then sets all bytes to zero
(iii) realloc( ): realloc is a memory allocation function that changes the size of previously allocated space. Sometime it may happen that the allocated memory space is larger than what is needed or it is less than what is needed. In both cases, we can change the memory size already allocated with the help of the realloc function called as reallocation of memory
N number of XNOR gates is linked in series that is the N inputs (A0, A1, A2......) are specified in the subsequently way: A0 and A1 to first XNOR gate and A2 and O/P of First XNOR
Solve the equation 65.535 10 = X 16 Ans. In order to get X, convert the Decimal number 65.535 in its equal Hexadecimal form. So first taking 65 the integer part to convert in i
Communications Parallel tasks classically need to exchange data. There are many ways in which this can be accomplished, such as, through a network or shared memory bus. The act
Single BUS STRUCTURES : The Bus structure and multiple bus structures are kinds of bus or computing. A bus is fundamentally a subsystem which transfers data amongst the compo
What is Hamiltonian path? A Hamiltonian path in a directed graph G is a directed path that goes through every node exactly once. We consider a special case of this problem whe
A 4-bit synchronous counter uses flip-flops with propagation delay times of 15 ns each. The maximum possible time required for change of state will be ? Ans. 15 ns since in sy
Q. Returns information about present virtual machine? int pvm_parent( void ) Returns the tid of process which spawned the calling process. int pvm_tidtohost(
Q. Define Interrupts in assembly language? An interrupt causes interruption of an ongoing program. A number of the common interrupts are: printer, monitor, keyboard, an error c
What are the advantages of Public Key Cryptography? Advantages of Public Key Cryptography are illustrated in below: a) Increased convenience and security and b) Electro
What are privileged instructions? Some of the machine instructions that might cause harm to a system are designated as privileged instructions. The hardware permits the privil
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