ADD SOME TEXT THROUGH CUSTOMIZER
ADD SOME TEXT THROUGH CUSTOMIZER

1. MV command in Unix changes-

A) Only the directory

B) Only the directory entry and i-node

C) Only the i-node number

D) All of the above


2. E-Commerce refers to-

A) Electrical commerce

B) Electronic commerce

C) Evolutionary commerce

D) Effective commerce


3. Graphs can be implemented using- (i) Arrays (ii) Linked list (iii) Stack (iv) Queue

A) (i), (ii) and (iv)

B) (i), (ii) and (iii)

C) (ii) and (iii)

D) (i) and (iv)


4. Thrashing

A) Always occur on large computers

B) is a natural consequence of virtual memory systems

C) Can always be avoided by swapping

D) Can be caused by poor paging algorithm


5. The process of converting analog signals into digital signals so they can be processed by a receiving computer is referred as-

A) modulation

B) demodulation

C) synchronizing

D) digitizing


6. The relational database environment has all of the following components except-

A) Users

B) Separate files

C) Database

D) Database administrator


7. Primary key

A) Denote a candidate key that is chosen by the database designer as the principal means of identifying entities with in an entity set

B) Attributes names of all primary key are unique

C) Primary key specification is optional and good idea to specify primary key for each relation

D) All of the above


8. The ________ states that a foreign key must either match a primary key value in another relation or it must be null.

A) entity integrity rule

B) referential integrity constraint

C) action assertion

D) composite attribute


1. A 2. B 3. D 4. D
5. D 6. B 7. D 8. A
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