Dear Friends with IT officer exams scheduled to take place in a couple of months we are here with our 1st sheet on computer study material for IT Officer.
1. OSI stands for
a) open system interconnection
b) operating system interface
c) optical service implementation
d) none of the mentioned
e) None of these
2. The OSI model has ___ layers.
a) 4
b) 5
c) 6
d) 7
e) None of these
3. TCP/IP model does not have ______ layer but OSI model have this layer.
a) session layer
b) presentation layer
c) application layer
d) both (a) and (b)
e) None of these
4. Which layer links the network support layers and user support layers
a) session layer
b) data link layer
c) transport layer
d) network layer
e) None of these
5. Which address is used in an internet employing the TCP/IP protocols?
a) physical address and logical address
b) port address
c) specific address
d) all of the mentioned
e) None of these
6. TCP/IP model was developed _____ the OSI model.
a) Prior to
b) after
c) simultaneous to
d) none of the mentioned
e) None of these
7. Which layer is responsible for process to process delivery?
a) network layer
b) transport layer
c) session layer
d) data link layer
e) None of these
8. Which address identifies a process on a host?
a) physical address
b) logical address
c) port address
d) specific address
e) None of these
9. Which layer provides the services to user?
a) Application layer
b) session layer
c) presentation layer
d) none of the mentioned
e) None of these
10. Transmission data rate is decided by
a) network layer
b) physical layer
c) data link layer
d) transport layer
e) None of these
11. Lan Switches work on which layer
a) Physical Layer
b) Data Link Layer
C) Network Layer
D) Application Layer
e) None of these
12. WAN Stands for
a) Wide Area Network
b) Wide Angle Network
c) Width Area Network
d) Wide Area Networking
e) None of these
13. If you want to upload a folder on your server how can you do it?
A) A folder cannot be uploaded on the server
B) Select the folder to be uploaded
C) Zip the folder and then upload it
D) Upload all subfolders
e) None of these
14. The physical layer concerns with
a) bit-by-bit delivery
p) process to process delivery
c) application to application delivery
d) none of the mentioned
e) None of these
15. Which transmission media has the highest transmission speed in a network?
a) coaxial cable
b) twisted pair cable
c) optical fiber
d) electrical cable
e) None of these
16. Bits can be send over guided and unguided media as analog signal by
a) digital modulation
b) amplitude modulation
c) frequency modulation
d) phase modulation
e) None of these
17. The portion of physical layer that interfaces with the media access control sublayer is called
a) physical signalling sublayer
b) physical data sublayer
c) physical address sublayer
d) none of the mentioned
e) None of these
18. physical layer provides
a) mechanical specifications of electrical connectors and cables
b) electrical specification of transmission line signal level
c) specification for IR over optical fiber
d) all of the mentioned
e) None of these
19. In asynchronous serial communication the physical layer provides
a) start and stop signalling
b) flow control
c) both (a) and (b)
d) none of the mentioned
e) None of these
20. The physical layer is responsible for
a) line coding
b) channel coding
c) modulation
d) all of the mentioned
e) None of these
21. The physical layer translates logical communication requests from the ______ into hardware specific operations.
a) data link layer
b) network layer
c) trasnport layer
d) application layer
e) None of these
22. A single channel is shared by multiple signals by
a) analog modulation
b) digital modulation
c) multiplexing
d) none of the mentioned
e) None of these
23. Wireless transmission can be done via
a) radio waves
b) microwaves
c) infrared
d) all of the mentioned
e) None of these
24. The network layer concerns with
a) bits
b) frames
c) packets
d) none of the mentioned
e) None of these
25. Which one of the following is not a function of network layer?
a) routing
b) inter-networking
c) congestion control
d) none of the mentioned
e) None of these
26. The 4 byte IP address consists of
a) network address
b) host address
c) both (a) and (b)
d) none of the mentioned
e) None of these
27. In virtual circuit network each packet contains
a) full source and destination address
b) a short VC number
c) both (a) and (b)
d) none of the mentioned
e) None of these
28. Which one of the following routing algorithm can be used for network layer design?
a) shortest path algorithm
b) distance vector routing
c) link state routing
d) all of the mentioned
e) None of these
29. Multidestination routing
a) is same as broadcast routing
b) contains the list of all destinations
c) data is not sent by packets
d) none of the mentioned
e) None of these
30. A subset of a network that includes all the routers but contains no loops is called
a) spanning tree
b) spider structure
c) spider tree
d) none of the mentioned
e) None of these
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