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Question
(a) Visual Basic is governed by an event processor. Explain the meaning of this phrase.
(b) Differentiate between an general procedure and event procedure.
(c) Write short notes on the following Visual basic errors:
(i) Syntax errors (ii) Run-time errors (iii) Logic errors.
(d) A Visual Basic application cannot directly interact with a database. There are two intermediate components between the application and the database. Using an appropriate diagram explain in details the two components.
(e) The ADO (ActiveX Data Object) data control is the primary interface between a Visual Basic application and a database. Explain the following properties associated with the ADO data control:
i. Command Type ii. Connection String iii. RecordSet iv. RecourdSource
Atomicity: It describes a transaction to be a one unit of processing. We can also say either a transaction will be finished completely or not at all. In the transaction example 1
Explain the term High level DML? High level DML A high-level or non-procedural DML permit the user to specify what data is needed without specifying how it is to be acquired.
Differentiate between logical database design and physical database design. Show how this separation leads to data independence? Basis Logical Databas
Describe the four main ways of optimising disk block access. Ans: a. Disk b. Non-volatile writes buffers c. File organization (Clustering) d. Log-based file system
What is a transaction ? The Transaction is a unit of data processing. For instance, many of the transactions at a bank may be withdrawal or deposit of money; transfer of money f
#questiononsider the following relation: CAR_SALE =(CAR_ID,oPTION_TYPE, Option_listpreice, Sale_date, Option_discountedprice)..
how map binary relation one to one
Physical Database Design Issues The database design includes the process of logical design with the use of E-R diagram, normalisation, etc., followed by the physical design.
Explain the ACID properties of a transaction Ans: ACID properties are a significant concept for databases. The ACID stands for Atomicity, Consistency, Isolation, and Durability
Explain Candidate Key and Super Key A super key is a set of one or more than attributes that, taken collectively, permits us to identify uniquely a tuple in the relation. Wher
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