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Home » Technical » Aptitude Test - 2
Hassan
1.Which of the following factors affect transmission rate in DSL ?
A. The gauge of the twisted-pair line
B. Degree of electrical interference
C. Shadow fading
D. The gauge of the twisted-pair line
2.How many layers are present in the Internet protocol stack (TCP/IP model) ?
A. 5 layers
B. 7 layers
C. 6 layers
D. 5 layers
3.The number of layers in ISO OSI reference model is ?
A. 5 layers
B. 7 layers
C. 6 layers
D. 5 layers
4.Which of the following layers is an addition to OSI model when compared with TCP IP model ?
A. Application layer
B. Presentation layer
C. Session layer
D. Application layer
5.Application layer is implemented in ?
A. End system
B. NIC
C. Ethernet
D. End system
6.Transport layer is implemented in ?
A. End system
B. NIC
C. Ethernet
D. End system
7.The functionalities of the presentation layer include ?
A. Data compression
B. Data encryption
C. Data description
D. Data compression
8.Delimiting and synchronization of data exchange is provided by ?
A. Application layer
B. Session layer
C. Transport layer
D. Application layer
9.In OSI model, when data is sent from device A to device B, the 5th layer to receive data at B is ?
A. Application layer
B. Transport layer
C. Link layer
D. Application layer
10.In TCP IP Model, when data is sent from device A to device B, the 5th layer to receive data at B is ?
A. Application layer
B. Transport layer
C. Link layer
D. Application layer
11.In the OSI model, as a data packet moves from the lower to the upper layers, headers are ?
A. Added
B. Removed
C. Rearranged
D. Added
12.Which of the following statements can be associated with OSI model ?
A. A structured way to discuss and easier update system components
B. One layer may duplicate lower layer functionality
C. Functionality at one layer no way requires information from another layer
D. A structured way to discuss and easier update system components
13.The physical layer is concerned with?
A. Bit-by-bit delivery
B. Process to process delivery
C. Application to application delivery
D. Bit-by-bit delivery
14.Which transmission media provides the highest transmission speed in a network?
A. Coaxial cable
B. Twisted pair cable
C. Optical fiber
D. Coaxial cable
15.Bits can be sent over guided and unguided media as analog signal by?
A. Digital modulation
B. Amplitude modulation
C. Frequency modulation
D. Digital modulation
16.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. Physical signalling sublayer
17.In asynchronous serial communication the physical layer provides?
A. Start and stop signalling
B. Flow control
C. Both A & B
D. Start and stop signalling
18.The physical layer is responsible for?
A. Line coding
B. Channel coding
C. Modulation
D. Line coding
19.A single channel is shared by multiple signals by?
A. Analog modulation
B. Digital modulation
C. Multiplexing
D. Analog modulation
20.Wireless transmission of signals can be done via?
A. Radio waves
B. Microwaves
C. Infrared
D. Radio waves
21.The data link layer takes the packets from and encapsulates them into frames for transmission?
A. Network layer
B. Physical layer
C. Transport layer
D. Network layer
22.Which of the following tasks is not done by data link layer?
A. Framing
B. Error control
C. Flow control
D. Framing
23.Which sub-layer of the data link layer performs data link functions that depend upon the type of medium?
A. Logical link control sublayer
B. Media access control sublayer
C. Network interface control sublayer
D. Logical link control sublayer
24.Header of a frame generally contains?
A. Synchronization bytes
B. Addresses
C. Frame identifier
D. Synchronization bytes
25.Automatic repeat request error management mechanism is provided by?
A. Logical link control sublayer
B. Media access control sublayer
C. Network interface control sublayer
D. Logical link control sublayer
26.When 2 or more bits in a data unit has been changed during the transmission, the error is called?
A. Random error
B. Burst error
C. Inverted error
D. Random error
27.CRC stands for?
A. Cyclic redundancy check
B. Code repeat check
C. Code redundancy check
D. Cyclic redundancy check
28.Which of the following is a data link protocol?
A. Ethernet
B. Point to point protocol
C. hdlc
D. Ethernet
29.Which of the following is the multiple access protocol for channel access control?
A. CSMA/CD
B. CSMA/CA
C. Both A & B
D. CSMA/CD
30.The technique of temporarily delaying outgoing acknowledgements so that they can be hooked onto the next outgoing data frame is called?
A. Piggybacking
B. Cyclic redundancy check
C. Fletcher’s checksum
D. Piggybacking
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