Quantitative aptitude and basic computer aptitude quiz

1)The retail price of rice decreased from Rs. 16 kg to Rs. 12 per kg. Find the percentage decrease.
a. 25%
b. 33.3%
c. 12.5%
d. 20%

2)A train 280 meters long is moving at a speed of 60 km/hr. The time taken by the train to cross a platform 220 meters long is
(a) 30 seconds
(b) 25 seconds
(c) 35 seconds
(d) 20 seconds

Overview of Data Communication

1. The ____________ is the physical path over which a message travels.
a. Protocol
b. Medium
c. Signal
d. All the above

2. The information to be communicated in a data communications system is the _________________
a. Medium
b. Protocol
c. Message
d. Transmission

3. Frequency of failure and network recovery time after a failure is measures of the _______________ of a network.
a. Performance
b. Reliability
c. Security
d. Feasibility

4. An unauthorized user is a network ____________ issue.
a. Performance
b. Reliability
c. Security
d. All the above

5. Which topology requires a central controller or hub?
a. Mesh
b. Star
c. Bus
d. Ring

6. Which topology requires a multipoint connection?
a. Mesh
b. Star
c. Bus
d. Ring

7. Communication between a computer and a keyboard involves _______ transmission.
a. Simplex
b. Half-duplex
c. Full-duplex
d. Automatic

8. In a network with 25 computers, which topology would require the most extensive cabling?
a. Mesh
b. Star
c. Bus
d. Ring

9. A television broadcast is an example of ____________ transmission.
a. Simplex
b. Half-duplex
c. Full-duplex
d. Automatic

10. A _____________connection provides a dedicated link between two devices.
a. Point-to-point
b. Multipoint
c. Primary
d. Secondary

11. In a ____________ connection, more than two devices can share a single link.
a. Point-to-point
b. Multipoint
c. Primary
d. Secondary

12. In a transmission, the channel capacity is shared by both communicating devices at all times.
a. Simplex
b. Half-duplex
c. Full-duplex
d. Half-simplex

13. A cable break in a ___________ topology stops all transmission.
a. Mesh
b. Bus
c. Star
d. Primary

14. Which organisation has authority over interstate and international commerce in the communications filed?
a. ITU-T
b. IEEE
c. FCC
d. ISO

15. The Internet model consists of ____________ layers.
a. Three
b. Five
c. Seven
d. Eight

16. The process-to-process delivery of the entire message is the responsibility of the ___________ layer.
a. Network
b. Transport
c. Application
d. Physical

17. The _____________ layer is the layer closest to the transmission medium.
a. Physical
b. Data link
c. Network
d. Transport

18. Mail services are available to network users through the ___________ layer.
a. Data link
b. Physical
c. Transport
d. Application

19. As the data packet moves from the lower to the upper layers, headers are_________
a. Added
b. Subtracted
c. Rearranged
d. Modified

20. As the data packet moves from upper to lower layers, headers are____________
a. Added
b. Removed
c. Rearranged
d. Modified

21. The __________ layer lies between the network layer and the application layer.
a. Physical
b. Data link
c. Transport
d. None of the above

22. Layer 2 lies between the physical and the _______________ layer.
a. Network
b. Data link
c. Transport
d. None of the above

23. When data are transmitted from device A to device B, the header from A’s layer 4 is read by B’s _____________ layer.
a. Physical
b. Transport
c. Application
d. None of the above

24. The _________________ layer changes bits into electromagnetic signals.
a. Physical
b. Data link
c. Transport
d. None of the above

25. The physical layer is concerned with the transmission of ___________ over the physical medium.
a. Programs
b. Dialogs
c. Protocols
d. Bits

26. Which layer functions as a liaison between user support layers and network support layers?
a. Network
b. Physical
c. Transport
d. Application

27. What is the main function of the transport layer?
a. Node-to-node delivery
b. Process-to-process delivery
c. Synchronization
d. Updating and maintenance of routing tables

28. Which of the following is an application layer service?
a. Remote log-in
b. File transfer and access
c. Mail service
d. All the above
_________________________________________________________________________________________________

Data Communication-II

1. The Internet model consists of ________ layers.
a. Three
b. Five
c. Seven
d. Eight

2. The process-to-process delivery of the entire message is the responsibility of the ________ layer.
a. Network
b. Transport
c. Application
d. Physical

3. The ________ layer is the layer closest to the transmission medium.
a. Physical
b. Data link
c. Network
d. Transport

4. Mail services are available to network users through the ______ layer.
a. Data link
b. Physical
c. Transport
d. Application

5. As the data packet moves from the lower to the upper layers, headers are _______
a. Added
b. Subtracted
c. Rearranged
d. Modified

6. As the data packet moves from the upper to the lower layers, headers are ________
a. Added
b. Removed
c. Rearranged
d. Modified

7. The ________ layer lies between the network layer and the application layer.
a. Physical
b. Data link
c. Transport
d. None of the above

8. Layer 2 lies between the physical layer and the ________ layer.
a. Network
b. Data link
c. Transport
d. None of the above

9. When data are transmitted from device A to device B, the header from A’s layer 4
is read by B’s ________ layer.
a. Physical
b. Transport
c. Application
d. None of the above

10. The ________ layer changes bits into electromagnetic signals.
a. Physical
b. Data link
c. Transport
d. None of the above

11. The physical layer is concerned with the transmission of _______ over the
physical medium.
a. Programs
b. Dialogs
c. Protocols
d. Bits

12. Which layer functions as a liaison between user support layers and network

support layers?
a. Network layer
b. Physical layer
c. Transport layer
d. Application layer

13. What is the main function of the transport layer?
a. Node-to-node delivery
b. Process-to-process delivery
c. Synchronization
d. Updating and maintenance of routing tables

14. Which of the following is an application layer service?
a. Remote log-in
b. File transfer and access
c. Mail service
d. All the above

Solution:

1.(a) 2.(b) 3.(a) 4.(d) 5.(a) 6.(b) 7.(c)

8.(a) 9.(b) 10.(a) 11.(d) 12.(c) 13.(b) 14.(d)

Data Communication-I

1. A network that spans a large city is known as a(n) ___________.
a. WAN
b. LAN
c. P2PN
d. MAN

2. The token ring network controls access to the network using ___________.
a. token passing
b. broadcast transmission
c. bus
d. facsimile technology

3. The environment in which most of the processing is done by the server is known as ___________.
a. client/server
b. peer-to-peer
c. EDI
d. file/server

4. One or more computers connected to a hub in a network are known as __________ topology.
a. bus
b. ring
c. star
d. mesh

5. The network type in which all computers have equal status is known as _____________.
a. client/server
b. communications link
c. peer-to-peer
d. LAN

6. Microwave transmission, fiber optics and twisted pairs are examples of ___________.
a. topologies
b. communication links
c. network devices
d. computer networks

7. Signals produced by a computer to be sent over to phone lines must be converted to ______________.
a. digital signals
b. analog signals
c. microwaves
d. radio waves

8. A network that has all nodes on a single cable is known as _______________.
a. bus
b. star
c. ring
d. mesh

9. Devices that transmit and receive satellite signals are known as ____________.
a. earth stations
b. tokens
c. workstations
d. servers

10. The physical layout of a LAN is known as ______________.
a. link
b. network
c. contention
d. topology

11. All of the following are examples of computer networks EXCEPT:
a. L2AN
b. P2PN
c. MAN
d. WAN

12. Which of the following is the most widely used packet switching protocol for WAN application?
a. Ethernet
b. X.25
c. T1
d. TCP/IP

13. Which term describes a computer that is connected to a network?
a. node
b. unit
c. device
d. terminal unit

14. What is the term used to describe the phenomenon when two computers try to send data at the same time using the same network?
a. contention
b. congestion
c. competition
d. communication

15. Which of the following is a WAN connection point that enables users to access the WAN using a local phone call?
a. POP
b. Leased line
c. PVC
d. ISDN

16. To connect to a LAN, a computer must be equipped with _______________.
a. backbone
b. network card
c. both a and b
d. none of the above

17. Which technology enables networks to transmit messages to their correct destination?
a. Packet switching
b. Circuit switching
c. Both a and b
d. None of the above

18. Two examples of ______________ are cable television lines and telephone lines.
a. communication channels
b. communication devices
c. sending devices
d. receiving devices

19. Internet transmissions usually use ______________.
a. Bluetooth
b. Ethernet
c. TCP/IP
d. broadcast transmission

20. Because of its larger size, most ___________ networks require a network administrator.
a. P2P
b. file/server
c. client/server
d. local

21. Sending and receiving devices include _________________.
a. tablet PCs, PDAs, and smart phones
b. mainframes computers and servers
c. desktop computers and notebook computers
d. all of the above