كل مايخص الحاسوب والبرامج (كمبيوتر -اندرويد) برمجة وغيرها
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Collisions occur when a new record hashes to a bucket that is already fuill
Reading or writing a disk block is time consuming because of the seek time
In a B+tree, all pointers to data records exists at the leaf-level nodes
primary index is dense index
A dense index has index entries for only some of the search values
Linear hashing does require an overflow area but does not use a directory
In linear hashing the directory is a binary tree
In ordered Files Record Insertion is quite efficient
Unspanned: record can span two blocks
A disk pack contains several magnetic disks connected to a rotating spindle
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جميع اوراق الامتحان تبعكم عندي الذي يريد يتاكد من حله وليش نقص في مادة الاستاذه سعاد يعمل لي رساله اصورها له ويوم الامتحان بجيب الاوراق معي واسلمها لكم
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مرفق لكم اسئلة الاختيارات الموجوده في نموذج الامتحان النصفي للاستاذه سعاد عثمان
بالتوفيق لكم جميعا
If record size R=2 bytes
block size B=4096 bytes r=12288 records, The number of file blocks is
uses memory-style redundancy
Includes one index entry for each block in the data file
distributes data transparently over multiple disks to make them appear as a single large, fast disk.
various overflow locations are kept, usually by extending the array with a number of overflow positions:
New records are inserted at the end of the file.
Typical block sizes range
