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Transaction :-                       A transaction is collection of operations that performs a single logical function in a database application that may lead to success or failure in operation maintaining integrity. ACID properties of transaction :- Atomicity : - Transaction must be either performed full or not at all. It will run to completion as as individual unit ,at the end of which either no change have occurred to database or database has been changed in consistent manner . At the end of transaction update it will be accessible to all. Consistency :- A correct execution of transaction must take DB from one consistent state to another, programmer is responsible for this. This property implies that if database was in consistent state before start of transaction ,then at any time of termination too it must be consistent. Independence:- Transaction must not make...

1.One can interface with operating system by means of ------- A) Operating system call in a program B) Operating system commands C) Operating system process D) Both by operating system call and operating system commands Answer :-  D) Both by operating system call and operating system commands 2. Which of the following is not type of processing ? A) Serial B) Network C) Batch D) Multiprogramming Answer :- B) Network 3. Kernel is _____ A) A part of operating system B) An operating system C) A hardware D) A register Answer :-  A) A part of operating system 4. UNIX operating system is based on ______ A) Language structure B) Kernel approach C) Virtual machine D) Time sharing Answer :-   B) Kernel approach 5. A transition between two memory resident process in a memory resident process in amultiprograming system is called ______ A) Process switch B) Mode switch C) Transition switch D) None of these Answer :-    A) Process ...