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Describe about the role of bitmap indexes to solve aggregation problems?
Ans) Bitmaps are very useful in begin schema to join large databases to small databases. Answer queries and bit arrays are used to do logical operations on the databases. Bit map indexes are very well-organized in handling Gender differentiation; also repetitive tasks are performed with much larger efficiency.
How many select lines will a 16 to 1 multiplexer will have ? Ans. For 16 to 1 MUX four select lines will be needed to select 16 (2 4 ) inputs.
Question : a) E-mail is a common feature nowadays in IT. What does it stands for and what is it used for? b) Briefly describe four advantages of using the electronic mail s
What is the Semiconductor memory chip A semiconductor memory chip comprises a large number of cells organized into an array and the logic necessary to access any array in the c
In which page replacement policies Balady’s anomaly occurs? FIFO that is First in First Out.
Explain importance of modems used in data transfer and list some of the V-series recommendations. The series also describes a variety of DCEs using different type modulatio
Q. How to reduce total amount of disk space in FTP? FTP service compress files to reduce total amount of disk space the files require. Before transferring a file user should te
write the rational schema and draw it’s dependency diagram. Identify all dependencies.
Explain the uses of thumbwheels Two thumbwheels are usually required to control the screen cursor in its horizontal and vertical position respectively. As the name implies,
S oftware Engineering - Layered Technology Although various authors have developed personal definitions of software engineering, a definition given by Fritz Bauer at the semin
What is a binary tree? A binary tree 'T' is described as A finite set of elements, known as nodes, such that: either (i) or (ii) happens: (i) T is empty (known as the 'nu
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