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Virtual University Spring 2014 MidTerm Exams: Request for Paper Rescheduling

Virtual University Spring 2014 MidTerm Exams: Request For Paper Rescheduling

Virtual University   Spring 2014 MidTerm Exams: Request for Paper Rescheduling

PAPERS RESCHEDULING

Rules

1.      A student may request for re-scheduling of missed examination paper(s) on payment of the prescribed fee (Rs.2000/paper and $20/paper for Overseas).

2.     Only missed papers will be considered for rescheduling.

3.      The re-schedule chance will be provided one time only as per the given schedule. No further re-scheduling of the same paper will be allowed.

4.      The decision of the University about re-scheduling i.e. city/center/date/time shall be final.

Procedure

1.      The rescheduling request(s) must be sent from VU email to rescheduling@vu.edu.pk not later than 20-June-2014. Late requests will not be entertained.

2.      The rescheduling fee will be payable before the announcement of result. Otherwise the result will be blocked.

Rescheduling Paper(s) will be conducted on 27th & 28th June, 2014. You will be informed about the schedule/date/time/center of your paper(s) on your email.

Virtual University Spring 2014 MidTerm Exams: Request For Paper Rescheduling

Virtual University of Pakistan Date Sheet: MSCS MidTerm Exam (SPRING 2014)

Virtual University Of Pakistan Date Sheet: MSCS MidTerm Exam (SPRING 2014)

Virtual University of Pakistan Date Sheet: MSCS MidTerm Exam (SPRING 2014)

 

Date Sheet: MSCS MidTerm Exam (SPRING 2014)
Date Course

Time

Sunday, 22-Jun-2014

 CS703 – Advanced Operating Systems

2:30 PM

Monday, 23-Jun-2014  CS711 – Software Design

2:30 PM

 CS716 – Advanced Computer Networks

Tuesday, 24-Jun-2014

 CS704 – Advanced Computer Architecture-II

2:30 PM

Wednesday, 25-Jun-2014

 CS708 – Software Requirements Engineering

2:30 PM

 CS707 – Network Security

Thursday, 26-Jun-2014

 CS724 – Software Process Improvement

2:30 PM

 CS721 – Network Performance Evaluation 
 

Virtual University Of Pakistan Date Sheet: MSCS MidTerm Exam (SPRING 2014)

VU CS601 -, DATA COMMUNICATION, FINALTERM, solve,d unsolved, past papers, Spring 2009

VU CS601 -, DATA COMMUNICATION, FINALTERM, Solve,d Unsolved, Past Papers, Spring 2009

FINALTERM  EXAMINATION

Spring 2009

CS601- Data Communication

 

Question No: 1      ( Marks: 1 ) – Please choose one

 

 

There are how many factors on which the performance of a network depends?

 

► Three

 

       ► Five

 

       ► Four

 

       ► Two

 

 

 

Question No: 2      ( Marks: 1 ) – Please choose one

 

 

_________requires the maximum number of I/O ports.

 

       ► Bus

 

       ► Star

 

       ► Mesh

 

       ► Ring

 

 

 

Question No: 3      ( Marks: 1 ) – Please choose one

 

 

Headers are added at layers 1 and 7 of OSI model.

 

       ► True

 

► False

 

 

 

Question No: 4      ( Marks: 1 ) – Please choose one

 

 

Trailer is only added at ________layer of OSI model.

 

► data link

 

       ► physical

 

       ► network

 

       ► application

 

 

 

Question No: 5      ( Marks: 1 ) – Please choose one

 

 

A sine wave must be an analog signal.

 

► True

 

       ► False

 

 

 

Question No: 6      ( Marks: 1 ) – Please choose one

 

 

If there is __________in voltage then the frequency is infinite.

 

► instantaneous change

 

       ► continuous change

 

       ► no change

 

 

 

Question No: 7      ( Marks: 1 ) – Please choose one

 

 

The inversion of the level at 1 bit is called as __________

 

► NRZ-L

 

       ► NRZ-I

 

       ► RZ

 

 

 

Question No: 8      ( Marks: 1 ) – Please choose one

 

 

The last process in PCM is _________ digital data into digital signal.

 

 

► encoding

 

► decoding

 

       ► modulating

 

 

 

Question No: 9      ( Marks: 1 ) – Please choose one

 

 

Amplitude in ASK is more resistive to EMI and Noise.

 

       ► True

 

► False

 

 

 

Question No: 10      ( Marks: 1 ) – Please choose one

 

 

If FCC regulations are followed, the carrier frequencies of adjacent AM radio stations are ____________ apart.

 

► 5 KHz

 

       ► 10 KHz

 

       ► 200 KHz

 

       ► 530 KHz

 

 

 

Question No: 11      ( Marks: 1 ) – Please choose one

 

 

In _____________ transmission, a start bit and a stop bit frame a character byte.

 

► Asynchronous serial

 

       ► Synchronous serial

 

       ► Parallel

 

       ► Asynchronous & Synchronous serial

 

 

 

Question No: 12      ( Marks: 1 ) – Please choose one

 

 

Synchronous transmission have _____________.

 

► a start bit

 

       ► a stop bit

 

       ► gaps between bytes

 

       ► none of the given

 

 

 

Question No: 13      ( Marks: 1 ) – Please choose one

 

 

Transmission media are usually categorized as _____________

 

       ► Fixed or Unfixed

 

       ► Guided or Unguided

 

       ► Determinate or Indeterminate

 

► Metallic or Nonmetallic

 

 

 

Question No: 14      ( Marks: 1 ) – Please choose one

 

 

The RG number gives us information about ________.

 

       ► Twisted pairs

 

► Coaxial cables

 

       ► Optical fibers

 

       ► all of the given

 

 

 

Question No: 15      ( Marks: 1 ) – Please choose one

 

 

Radio wave and microwave frequencies range from _________.

 

       ► 3 to 300 KHz

 

       ► 300 KHz to300 KHz to 3 GHz

 

► 3 KHz to 300 GHz

 

       ► 3 KHz to 3000 GHz

 

 

 

Question No: 16      ( Marks: 1 ) – Please choose one

 

 

All of popular Fiber optic connectors are ___________ shaped.

 

       ► Conical

 

► Barrel

 

       ► Circular

 

► Rectangular

 

 

 

Question No: 17      ( Marks: 1 ) – Please choose one

 

 

In ______________ method a signal can be directed in a straight from Antenna to antenna.

 

► Line of sight

 

       ► Ground propagation

 

       ► Sky propagation

 

       ► Microwaves

 

 

 

Question No: 18      ( Marks: 1 ) – Please choose one

 

 

Amplifiers are used to __________the signal to heat.

 

► Amplify

 

       ► Rectify

 

       ► Testify

 

       ► NUllify

 

 

 

Question No: 19      ( Marks: 1 ) – Please choose one

 

 

There are ________ basic categories of multiplexing.

 

► 3

 

       ► 4

 

       ► 2

 

       ► 5

 

 

 

Question No: 20      ( Marks: 1 ) – Please choose one

 

 

If a T-1 carries 8000 frames, the data rate is ___________

 

       ► 2.544 Mbps

 

► 1.544 Mbps

 

       ► 1.544 Kbps

 

       ► 1.544 Gbps

 

 

 

Question No: 21      ( Marks: 1 ) – Please choose one

 

 

FTTC stands for _____________

 

       ► flexible to the curb

 

► fiber to the curb

 

       ► fiber to the cable

 

       ► fiber to the center

 

 

 

Question No: 22      ( Marks: 1 ) – Please choose one

 

 

Optical signals are multiplexed using _________ at switching office to create wider BW optical signals

 

       ► WDM

 

       ► FDM

 

       ► TDM

 

       ► MUX

 

 

 

Question No: 23      ( Marks: 1 ) – Please choose one

 

 

Which error detection method consists of a parity bit for each unit as well as an entire data unit of parity bits?

 

► Simple parity check

 

       ► Two-dimensional parity check

 

       ► CRC

 

       ► Checksum

 

 

 

Question No: 24      ( Marks: 1 ) – Please choose one

 

 

If the ASCII character G is sent and the character D is received, what type of error is this?

 

       ► Single-bit

 

► Multiple-bit

 

       ► Burst

 

       ► Recoverable

 

 

 

Question No: 25      ( Marks: 1 ) – Please choose one

 

 

Flow control is needed to prevent ____________

 

       ► Bit errors

 

       ► Overflow of the sender buffer

 

       ► Overflow of the receiver buffer

 

       ► Collision between sender and receiver

 

 

 

Question No: 26      ( Marks: 1 ) – Please choose one

 

 

In data link layer, communication requires at least ___________ devices working together

 

       ► 3

 

► 2

 

       ► 4

 

       ► 5

 

 

 

Question No: 27      ( Marks: 1 ) – Please choose one

 

 

Data link control is composed of ____________ important functions.

 

       ► 2

 

► 3

 

       ► 4

 

       ► 5

 

 

 

Question No: 28      ( Marks: 1 ) – Please choose one

 

 

Error control is both error _________ and error ___________

 

► detection; correction

 

       ► detection; deletion

 

       ► detection; avoidance

 

       ► detection; forwarding

 

 

 

Question No: 29      ( Marks: 1 ) – Please choose one

 

 

ENQ/ACK stands for______________

 

► Enquiry/ Acknowledgment

 

       ► Enque/ Acknowledgment

 

       ► Enquist/ Acknowledgment

 

       ► none of the given

 

 

 

Question No: 30      ( Marks: 1 ) – Please choose one

 

 

In __________ ARQ, if a NAK is received, only the specific damaged or lost frame is retransmitted.

 

       ► Stop-and-wait

 

       ► Go-Back-N

 

       ► Selective repeat

 

       ► Stop-and-wait & Go-back-N

 

 

 

Question No: 31      ( Marks: 1 ) – Please choose one

 

 

Sliding window requires that data frames be transmitted _______________

 

► Sequentially

 

       ► Frequently

 

       ► Synchronously

 

       ► Asynchronously

 

 

 

Question No: 32      ( Marks: 1 ) – Please choose one

 

 

Which of the following combines features of the other two.

 

► ZMODEM

 

       ► YMODEM

 

       ► XMODEM

 

       ► None of given

 

 

 

Question No: 33      ( Marks: 1 ) – Please choose one

 

 

BLAST stands for :

 

► Blocked asynchronous transmission

 

► Blocked synchronous transmission

 

       ► Barrel asynchronous transmission

 

       ► Below asynchronous transmission

 

 

 

Question No: 34      ( Marks: 1 ) – Please choose one

 

 

HDLC is an acronym for ______________.

 

       ► High-duplex line communication

 

► High-level data link control

 

       ► Half-duplex digital link combination

 

       ► Host double-level circuit

 

 

 

Question No: 35      ( Marks: 1 ) – Please choose one

 

 

The HDLC ___________ field defines the beginning and end of a frame.

 

 

► Flag

 

       ► Address

 

       ► Control

 

       ► FCS

 

 

 

Question No: 36      ( Marks: 1 ) – Please choose one

 

 

The shortest frame in HDLC protocol is usually the _________ frame.

 

       ► Information

 

► Supervisory

 

       ► Management

 

       ► None of the given

 

 

 

Question No: 37      ( Marks: 1 ) – Please choose one

 

 

The PDU  has no flag fields, no CRC, and no station address

 

► TRUE

 

       ► FALSE

 

 

 

Question No: 38      ( Marks: 1 ) – Please choose one

 

 

_________ is the access protocol used by traditional Ethernet.

 

► CSMA/CD

 

       ► CSMA/CA

 

       ► Token Ring

 

       ► CSMA

 

 

 

Question No: 39      ( Marks: 1 ) – Please choose one

 

 

Repeater is an amplifier, not a regenerator.

 

► True

 

► False

 

 

 

Question No: 40      ( Marks: 1 ) – Please choose one

 

 

Bridges can divide a large ________ into smaller segments

 

       ► Network

 

       ► Packet

 

► Frame

 

       ► Address

 

 

 

Question No: 41      ( Marks: 2 )

 

 

Stop-and- wait ARQ has two control variables S and R. What are their functions? [2]

 

Go-back-n ARQ

Selective Reject ARQ

 

Question No: 42      ( Marks: 2 )

 

What’s the name of the telephone service in which there is no need of dialing.

 

 

 

Question No: 43      ( Marks: 2 )

 

 

What is meant by Transmission Impairments?

 

 

 

Question No: 44      ( Marks: 3 )

 

 

How does the checksum checker know that the received data unit is undamaged? [3]

 

 

Question No: 45      ( Marks: 3 )

 

 

What is Geosynchronous satellite?

 

 

.

Question No: 46      ( Marks: 3 )

 

 

Following abbreviations stands for?

  1. ARP
  2. RARP
  3. 3.      ICMP    

 

Question No: 47      ( Marks: 5 )

 

 

Name and discuss briefly the bits in the HDLC control field. [5]

 

 

Question No: 48      ( Marks: 5 )

 

 

Describe method of checksum briefly?

 

 

 

 

 

Question No: 49      ( Marks: 5 )

 

 

What is satellite communication?

 

 

 

Question No: 50      ( Marks: 10 )

 

 

In how many ways TDM can be implemented? Describe any one with example.

 

 

VU CS601 -, DATA COMMUNICATION, FINALTERM, Solve,d Unsolved, Past Papers, Spring 2009

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