Important notes

1. XII (CMS Objective) - 2023
1. A Boolean expression that always results in true is known as
a. Maxterm c. Minterm
b. Tautology d. Fallacy
2. A Boolean expression that always results in False is known as
c. Maxterm c. Minterm
d. Tautology d. Fallacy
3. The Boolean expression A + (B+C) = (A+B) +C
a. Associative Law c. Commutative Law
b. Absorption Law d. Distributive Law
4. The Boolean expression A.(B+C) = AB + AC
c. Associative Law c. Commutative Law
d. Absorption Law d. Distributive Law
5. Logic Gate are minimized using
a. Theorem c. K -Map
b. Postulates d. All the above
6. POS means
a. Product of Sums c. Position of sum
b. Product of simple d. None of these
7. SOP means
a. Sum of products c. Sum of Positive
b. Simple odd products d. None of these
8. The Boolean expression X + XY = X is called
a. Associative Law c. Commutative Law
b. Absorption Law d. Distributive Law
9. The solution of X.(X+Y) is equal to
a. X b. X’ c. X+Y d. None of these
10. How many input combinations can be there for ‘n’ input in a logic
system?
a. N b. 2n c. 2n
d. n2
11. Binary or Bool valued quantities can be
a. 0 or 1 c. True or False
b. Right or Wrong d. All of these
12. A collection of interrelated records is called a
a. Database c. Spreadsheet
b. Datasheet d. Utility File
13. DBMS means
a. Database Management System
b. Domain Base Management System
c. Database Manipulation System
d. None of the above
14. Duplication of data is known as
a. Data redundancy b. Data inconsistency
b. Data security d. None of these
15. Highest level of abstraction is
a. Physical Level c. Logical Level
b. View Level d. High Level
16. Physical level of abstraction closest to ___________.
a. Hardware c. User
b. Software d. None of these
17. External level of abstraction closest to ______.
a. Hardware c. User
b. Software d. None of these
18. Which level of abstraction describe “How data are physically store on
the storage medium”
a. Physical level c. Logical level
b. External level d. Storage level
19. Which level of abstraction describe “What data are stored in the
database”
a. Physical level c. Logical level

2. b. External level d. Storage level
20. Ability to modify the scheme in one level without affecting the scheme
in the higher level called ___________.
a. Scheme Independency c. Level Independency
b. System Independency d. Data Independency
21. Ability to modify the scheme at the physical level without affecting the
conceptual level called _______.
a. Physical data independence c. Logical data
independence
b. System data independence d. None of these
22. Ability to modify the scheme at the logical level without affecting the
view level called _______.
a. Physical data independence c. Logical data
independence
b. System Independence d. None of these
23. Set of one or more attribute that can uniquely identify tuples within a
relation
a. Primary Key c. Alternate Key
b. Candidate Key d. foreign key
24. Attribute combination in a relation that can serve as a primary key
a. Primary Key c. Alternate Key
b. Candidate Key d. foreign key
25. A candidate key which is not Primary Key
a. Primary Key c. Alternate Key
b. Candidate Key d. foreign key
26. Non-key attribute, which is primary key of another table
a. Primary Key c. Alternate Key
b. Candidate Key d. foreign key
27. A row of a relation is also known
a. Attribute b. Row c. Tuple d. Relation
28. A column of a relation is also known
a. Attribute b. Row c. Tuple d. Relation
29. No of row in a relation is called
a. Cardinality b. Degree c. Domain d. Relation
30. No of column in a relation is called
a. Cardinality b. Degree c. Domain d. Relation
31. An interconnected collection of autonomous computers
a. Bridge c. Router
b. Hub d. Network
32. Network of Networks is ___________
a. Intranet c. Internet
b. Webpage d. Browser
33. First network based on TCP/IP protocols is
a. NFS c. NFSNET
b. ARCNET d. ARPANET
34. MAN refers to
a. Mini Area Network c. Mega Area Network
b. Medium Area Network d. Metropolitan Area Network
35. LAN refers to
a. Local Area Network
b. Limited Area Network
c. Line Area Network
d. Low Area Network
36. WAN refers to
a. Wide area network
b. Wide arial network
c. Wild area network
d. Wired area network
37. PAN refers
a. Permanent Area Network
b. Primary Area Network
c. Personal Area Network

3. d. Prime Area Network
38. A computer peripheral that allows you to connect and communicate
with other computers via telephone lines.
a. LAN b. WAN c. MODEM d. HUB
39. Hardware device used to connect several computers together
a. HUB b. SWITCH c. REPEATER d. ROUTER
40. A device that used to segment networks into subnetworks
a. HUB b. SWITCH c. REPEATER d. ROUTER
41. A device that amplifies a signal being transmitted on the network
a. HUB b. BRIDGE c. REPEATER d. ROUTER
42. A device that links two networks together
a. HUB b. BRIDGE c. REPEATER d. ROUTER
43. A device that works like bridge but can handle different protocol
a. HUB b. SWITCH c. REPEATER d. ROUTER
44. The pattern of interconnection of nodes in a network is called
a. Topology b. Net-Pattern c. LAN-Graph d. None
45. A client/ server software program that allow multiple users to
communicate online with real-time audio video and text chat in dynamic
3D environment.
a. Internet b. Interspace c. Intranet d. Interwork
46. Fastest physical connection / transmission media is
a. Coaxial Cable c. Infrared
b. Microwave d. Fiber – optic
47. Web Browser is/are
a. Google Chrome b. Firefox c. Internet Explorer d. All of
these
48. An internet utility used for remote login
a. Telnet b. Remote Login c. Cookies d. Firewall
49. Which is not a unit for data transfer rate?
a. Kbps b. Mbps c. Gbps d. Sbps