•What is the main purpose of SQR function and PRINT function? •What is meant by DBMS?

•Write the full form of QBasic.



Jo kho kr kabhi na mile
Vo insaan ki mohabaat,

Aur jise tu baar baar kho
Kar har baar paa le,

"Woh Rab ki mohabaat"

Suppose there is a relation r(a, b, c) with a b+-tree index with search keys (a, b).1. what is the worst-case cost of finding records satisfying 10 < a < 50 using this index, in terms of the number of records n1, retrieved and the height h of the tree? 2. what is the worst-case cost of finding records satisfying 10 < a < 50 and 5 < b < 10 using this index, in terms of the number of records n2 that satisfy this selection, as well as n1 and h defined above? 3. under what conditions on n1 and n2, would the index be an efficient way of finding records satisfying the condition from part (2)?