This will allow you to access the device’s Public folder, download files from the device, and transfer files to the device. ![]() Exchange will open when you click on the macOS Bluetooth connection window.You may then transmit the file to the other Mac by selecting it in the Bluetooth File Exchange Finder box that later displays, clicking the Share button, and then navigating to the file you desire to send.After you have confirmed that the Bluetooth Sharing option is enabled for the service, go to the Finder on the host machine, choose Applications, double-click Utilities, and then double-click Bluetooth File Exchange.Open Bluetooth on the destination Mac by clicking the Bluetooth icon in the menu bar or by clicking the System Preferences button, selecting Bluetooth, and ensuring that Bluetooth is turned on and the system is in Discoverable mode.Prepare your sender MacBook for the exchange of files.This can be extended to 3 or more levels depending on the maximum file size. Multilevel index: In this policy, a first level index block is used to point to the second level index blocks which inturn points to the disk blocks occupied by the file.Every index block would then contain a pointer or the address to the next index block. Linked scheme: This scheme links two or more index blocks together for holding the pointers.However, in linked allocation we lose the space of only 1 pointer per block.įor files that are very large, single index block may not be able to hold all the pointers.įollowing mechanisms can be used to resolve this: For very small files, say files that expand only 2-3 blocks, the indexed allocation would keep one entire block (index block) for the pointers which is inefficient in terms of memory utilization.The pointer overhead for indexed allocation is greater than linked allocation.It overcomes the problem of external fragmentation.This supports direct access to the blocks occupied by the file and therefore provides fast access to the file blocks.The directory entry contains the address of the index block as shown in the image: The ith entry in the index block contains the disk address of the ith file block. In this scheme, a special block known as the Index block contains the pointers to all the blocks occupied by a file. Pointers required in the linked allocation incur some extra overhead.A block k of a file can be accessed by traversing k blocks sequentially (sequential access ) from the starting block of the file via block pointers. We can not directly access the blocks of a file. It does not support random or direct access.Because the file blocks are distributed randomly on the disk, a large number of seeks are needed to access every block individually.This makes it relatively better in terms of memory utilization. This method does not suffer from external fragmentation.File size can be increased easily since the system does not have to look for a contiguous chunk of memory. This is very flexible in terms of file size.The last block (25) contains -1 indicating a null pointer and does not point to any other block. The file ‘jeep’ in following image shows how the blocks are randomly distributed. Each block contains a pointer to the next block occupied by the file. The directory entry contains a pointer to the starting and the ending file block. The disk blocks can be scattered anywhere on the disk. In this scheme, each file is a linked list of disk blocks which need not be contiguous. Increasing file size is difficult because it depends on the availability of contiguous memory at a particular instance.This makes it inefficient in terms of memory utilization. This method suffers from both internal and external fragmentation.Software Engineering Interview Questions. ![]() Top 10 System Design Interview Questions and Answers. ![]() Top 20 Puzzles Commonly Asked During SDE Interviews.Commonly Asked Data Structure Interview Questions.Top 10 algorithms in Interview Questions.Top 20 Dynamic Programming Interview Questions.Top 20 Hashing Technique based Interview Questions.Top 50 Dynamic Programming (DP) Problems.Top 20 Greedy Algorithms Interview Questions.Top 100 DSA Interview Questions Topic-wise.
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