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What is meant by functional dependency?
Amandeep Kaur Dhawan
- Jan 12th, 2010
A is said to be functional dependent on B if for every value of B, there is unique value of A.
sravan
- Dec 29th, 2006
In a relational schema........if an attribute is functionally dependent on another attribute the there is said exist a functional dependency......
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How is linked list implemented?
By referential structures
Amandeep Kaur Dhawan
- Jan 12th, 2010
By a node having two parts: INFO part and LINK part. Info part contains the data and link part contains link to another node. struct node{ int info; node *link;};
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What is meant by polymorphism?
Redefinition of a base class method in a derived class
Amandeep Kaur Dhawan
- Jan 12th, 2010
Polymorphism means to take more than one form. function overloading and operator overloading are examples of compile time polymorphism and virtual function is an example of run time polymorphism.
deepakkumarpatel
- Feb 2nd, 2006
Polymorphism is Poly+morph(multi form). It is implemented by method overloading and overriding. The JVM/compiler decide which method is to be called at runtime, this is called late binding. Polymorphism is a powerful mechanism of OOPS.
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John wants to retrieve all records from students table who live in any city beginning with WAS . Which of the following statement is to be executed by himA. Select * from students where city = 'WAS'B. Select * from students where city = 'WAS%'C. Select * from students where city in 'WAS'D. Select * from students where city like 'WAS%'
Amandeep Kaur Dhawan
- Jan 12th, 2010
D. for match type queries we use like operator, and % stands for 1 or more characters.
Raghu
- Aug 3rd, 2006
Answer: D
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What was the first name given to Java Programming Language?A. Oak - JavaB. Small TalkC. OakD. None
A
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!= is a ---------- operator.A. relationalB. logicalC. stringD. arithmetic
