describe one common error in using dynamic memory allocation.
describe one common error in using dynamic memory allocation.
Homework Answers
The most common error while using dynamic memory allocation is deferencing the pointer without verifying the pointer without verifying whether allocations is successful or not.And usually dynamic allocation returns null in case of insufficient memory and it will return null pointer exception and it points to no where hence deferencing the pointer can result in termination of program
Introduction: One of the most important uses of pointers is for dynamic allocation of memory. In...
Introduction: One of the most important uses of pointers is for dynamic allocation of memory. In C++ there are commands that let the user request a chunk of memory from the operating system, and use this memory to store data. There are also commands to return memory back to the O/S when the program is finished using the data. In this lab, we will explore some of the things that can go wrong when using dynamic memory and discuss how...
Please describe the key principle of the contiguous memory allocation method. What are the hardware support...
Please describe the key principle of the contiguous memory allocation method. What are the hardware support for contiguous memory allocation? What are the key disadvantages of the contiguous memory allocation method?
Programs written in a language that supports pointers and dynamic memory allocation can suffer from dangling...
Programs written in a language that supports pointers and dynamic memory allocation can suffer from dangling pointers and lost heap-dynamic variables (or garbages). (a) A dangling pointer is a pointer that contains the address of a piece of memory that no longer belongs to the program. Give one scenario that can cause dangling pointers. Support your scenario with sample codes in your favorite language. Poorly implemented languages leave the detection of the dangling pointer problem to the operating system. Suggest...
Provide an overview of memory allocation and the services (allocation and deallocation) provided by the memory...
Provide an overview of memory allocation and the services (allocation and deallocation) provided by the memory manager. size = 1024 // 1,024 bytes pointer = malloc( size ) // allocate size bytes of memory if pointer is NULL raise_error no_memory // not enough memory! … // use the memory free( pointer ) // release the memory
Most systems allow a program to allocate more memory to its address space during execution. Allocation...
Most systems allow a program to allocate more memory to its address space during execution. Allocation of data in the heap segments of programs is and example of such allocated memory. What is required to support dynamic memor allocation in the following schemes? a. Contiguous memory allocation b. Pure segmentation c. Pure paging Explain each of the above schemes and provide sources to back your answers.
Memory Allocation a) Is it possible to have both internal and external fragmentation with fixed p...
Memory Allocation a) Is it possible to have both internal and external fragmentation with fixed partition memory allocation? How about with dynamic/variable memory partition allocation? Explain. (1 point) b) Suppose we have 1000K of memory where the first 100K is reserved. Also suppose that the following processes have been allocated memory in the following order: P1: 100K, P2: 100K, P3: 25K, P4: 200K, P5: 200K, P6: 75K, P7: 100K. Create a diagram of memory. Suppose that P2, P4, and P6...
Memory Allocation a) Is it possible to have both internal and external fragmentation with fixed partition...
Memory Allocation a) Is it possible to have both internal and external fragmentation with fixed partition memory allocation? How about with dynamic/variable memory partition allocation? Explain. (1 point) b) Suppose we have 1000K of memory where the first 100K is reserved. Also suppose that the following processes have been allocated memory in the following order: P1: 100K, P2: 100K, P3: 25K, P4: 200K, P5: 200K, P6: 75K, P7: 100K. Create a diagram of memory. Suppose that P2, P4, and...
Files, Pointers and Dynamic Memory Allocation, and Structs Due date/time: Tuesday, Nov 26th, 11:00 PM. WRITE...
Files, Pointers and Dynamic Memory Allocation, and Structs Due date/time: Tuesday, Nov 26th, 11:00 PM. WRITE A C++ PROGRAM (USE DYNAMIC MEMORY ALLOCATION) THAT READS N CUSTOMER RECORDS FROM A TEXT FILE (CUSTOMERS.TXT) SUCH THAT THE NUMBER OF THE RECORDS IS STORED ON THE FIRST LINE IN THE FILE. EACH RECORD HAS 4 FIELDS (PIECES OF INFORMATION) AND STORED IN THE FILE AS SHOWN BELOW: Account Number (integer) Customer full name (string) Customer email (string) Account Balance (double) The program...
What are some advantages and disadvantages of the First-Fit memory allocation algorithm? List at least one...
What are some advantages and disadvantages of the First-Fit memory allocation algorithm? List at least one (1) advantage and disadvantage. What are some advantages and disadvantages of the Best-Fit memory allocation algorithm? List at least one (1) advantage and disadvantage.
C programming language 4. (Memory allocation) Consider typedef struct char name [20]; int balance; int gain;...
C programming language
4. (Memory allocation) Consider typedef struct char name [20]; int balance; int gain; ) Player; int ni Player pi scanf ("%d", &n); Complete the code above by allocating a memory for n players each of which of type Player and making p point to the start of that memory (or in other words, making p have the value of the starting address of that memory). [Recall the slides on dynamic memory allocation function malloc.]
Programs written in a language that supports pointers and dynamic memory allocation can suffer from dangling pointers and lost heap-dynamic variables (or garbages). (a) A dangling pointer is a pointer that contains the address of a piece of memory that no longer belongs to the program. Give one scenario that can cause dangling pointers. Support your scenario with sample codes in your favorite language. Poorly implemented languages leave the detection of the dangling pointer problem to the operating system. Suggest...
C programming language
4. (Memory allocation) Consider typedef struct char name [20]; int balance; int gain; ) Player; int ni Player pi scanf ("%d", &n); Complete the code above by allocating a memory for n players each of which of type Player and making p point to the start of that memory (or in other words, making p have the value of the starting address of that memory). [Recall the slides on dynamic memory allocation function malloc.]
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