All Questions
Question

Two channels, one with a bit rate of 150 kbps and another with a bit rate of 140 kbps are to be multiplexed using pulse stuffing TDM with no synchronous bits. Answer the following questions:-

(i) What is the size of a frame in bits?

(ii) What is the frame rate?

Subject Data Communication
NU Year 2013
Question

What is Synchronous Time Division Multiplexing? What are the features of it?

Subject Data Communication
NU Year 2013
Question

Compare between the features of FDM and TDM.

Subject Data Communication
NU Year 2013 2015
Question

What is switching network? Describe packet switching principles with necessary figure

Subject Data Communication
NU Year 2013
Question

What are data and information? Mention the differences between data and information?

Subject Introduction to Computer System
NU Year 2007
Question

 Draw the basic organization of a computer system

Subject Introduction to Computer System
NU Year 2007
Question

What are the types of computer? Write the classification of digital computer

Subject Introduction to Computer System
NU Year 2007
Question

What is computer bus? Write are the buses used in computer system? Draw the bus architecture of a computer system

Subject Introduction to Computer System
NU Year 2007
Question

What is software? Write the classification of software and explain

Subject Introduction to Computer System
NU Year 2007
Question

What is an operating system? Write the function of an operating system

Subject Introduction to Computer System
NU Year 2007
Question

What is output device? Mention the name of five output devices

Subject Introduction to Computer System
NU Year 2007
Question

Write the classification of printers

Subject Introduction to Computer System
NU Year 2007
Question

Write short notes on touch screen, joysticks, scanner and digital camera

Subject Introduction to Computer System
NU Year 2007
Question

Define data communication. Explain the characteristics of data communication system.

Subject Data Communication
NU Year 2015
Question

Define analog and digital signal. Briefly explain the different types of noise in data transmission

Subject Data Communication
NU Year 2015
Question

What is channel capacity? Briefly describe the Nyquist Bandwidth and Shanon capacity formula

Subject Data Communication
NU Year 2015
Question

Given a channel with an intended capacity of 20 Mbps. The bandwidth of the channel is 3Mhz. What signal-to-noise ratio is required in order to achieve this capacity? 

Subject Data Communication
NU Year 2015
Question

Define data rate and signal rate

Subject Data Communication
NU Year 2015
Question

Describe data encoding & modulation techniques with figures

Subject Data Communication
NU Year 2015
Question Distinguish guided and unguided media with examples.
Subject Data Communication
NU Year 2015 2014
Question

A channel has a bit rate of 4 Kbps and a propagation delay of 20 m sec For what range of frame size does stop and wait give and efficiency of at least 50 percent ?

Subject Data Communication
NU Year 2015
Question

Define multiplexing.Describe Frequency Division Multiplexing (FDM)

Subject Data Communication
NU Year 2015
Question

Given the following information, find the minimum bandwidth required for the path :

FDM Multiplexing

Five devices, each required 4000Hz,

200Hz guard band for each device.

Subject Data Communication
NU Year 2015
Question

What is IP address? Classify the IP address of class A, B, C and D network.

Subject Data Communication
NU Year 2015
Question

Write short notes on the following (any four)

(a) Circuit switching

(b) Wireless transmission

(c) HDLC

(d) ARQ

(e) ATM network

(f) Datagram


Subject Data Communication
NU Year 2015
Question Difference between circuit switching packet switching and ?   
Subject Data Communication
NU Year 2014
Question

What do you mean by network protocol ? Describe the layers of OSI model 

Subject Data Communication
NU Year 2014
Question

Define fundamental frequency and channel capacity

Subject Data Communication
NU Year 2014
Question

What is relationship between signal's spectrum and its bandwidth?

Subject Data Communication
NU Year 2014
Question

For the following digital data sketch the signal waveform using  NRZ-L Bipolar .AMI and Manchester encoding scheme for 1011000111001

Subject Data Communication
NU Year 2014
Question

With neat diagram explain the interleaving technique

Subject Data Communication
NU Year 2014
Question

A multiplexer combine's of  100 Kbps Channel using a time slot of 2 bits. Show the out with four arbitrary inputs :-

(i)  What is the frame rate?

(ii) What is the frame duration?

(iii) What is the bit rate?

(iv) What is the bit duration? 

Subject Data Communication
NU Year 2014
Question

Name the advantages of optical fiber over twisted pair and coaxial cable

Subject Data Communication
NU Year 2014
Question

How does the propagation differ from line-of sight propagation?

Subject Data Communication
Question

How does the sky propagation differ from line-of sight propagation?

Subject Data Communication
NU Year 2014
Question

Discuss about wireless transmission waves

Subject Data Communication
NU Year 2014
Question

Describe the need for switching and define the switch

Subject Data Communication
Question

Describe the need for switching and define a switch

Subject Data Communication
NU Year 2014
Question

Compare space division time division switches

Subject Data Communication
NU Year 2014
Question

Write short notes (any four) :-

(a) Digital switch

(b) Cellular communication 

(c) Stop-and-wait-ARQ;

(d) VSAT

(e) QPSK

(f) X-25 protocols

Subject Data Communication
NU Year 2014
Question

What do you mean by Information Systems analysis and design? Describe the different types of Information Systems are used for System Development.

Subject System Analysis and Design
Question

Distinguish between analog and digital devices.

Subject Computer Graphics and Multimedia
NU Year 2009
Question

Describe different components of a basic raster-scan CRT.

Subject Computer Graphics and Multimedia
NU Year 2009
Question

Explain Bresenham’s algorithm for scan-converting a circle.

Subject Computer Graphics and Multimedia
NU Year 2009
Question

What are the side effects of scan conversion? Describe them.

Subject Computer Graphics and Multimedia
NU Year 2009
Question

Define geometric transformations and coordinate transformation.

Subject Computer Graphics and Multimedia
NU Year 2009
Question

Define translation, rotation, scaling and mirror reflection of two-dimensional geometric transformations

Subject Computer Graphics and Multimedia
NU Year 2009
Question

Define windows, viewports, aspect ratio, clipping and shielding

Subject Computer Graphics and Multimedia
NU Year 2009
Question

Define hidden-surface problem. Why are hidden-surface algorithms needed?


Subject Computer Graphics and Multimedia
NU Year 2009
Question

Describe Z-Buffer algorithm for removing hidden surfaces from pictures.


Subject Computer Graphics and Multimedia
NU Year 2009
Question

How does the Z-Buffer algorithm determine which surfaces are hidden?


Subject Computer Graphics and Multimedia
NU Year 2009
Question

Distinguish between perspective projection and parallel projection.

Subject Computer Graphics and Multimedia
NU Year 2009
Question

Explain different perspective anomalies.

Subject Computer Graphics and Multimedia
NU Year 2009
Question

What is multimedia?Discuss classifications of multimedia?

Subject Computer Graphics and Multimedia
NU Year 2009
Question

What digital audio? What are the advantages of digital audio over analog audio?

Subject Computer Graphics and Multimedia
NU Year 2009
Question

State and explain sampling theorem

Subject Computer Graphics and Multimedia
NU Year 2009
Question

What do you mean by digital image?

Subject Computer Graphics and Multimedia
NU Year 2009
Question

What is data compression? Why data compression is nestled?

Subject Computer Graphics and Multimedia
NU Year 2009
Question

Write down the Huffman coding algorithm used in lossless compression.


Subject Computer Graphics and Multimedia
NU Year 2009
Question

What is 2D Discrete Cosine Transformation (DCT)?

Subject Computer Graphics and Multimedia
NU Year 2009
Question

Describe the basic principles of video compression.


Subject Computer Graphics and Multimedia
NU Year 2009
Question

Compare MPEG-I with MPEG-II?

Subject Computer Graphics and Multimedia
NU Year 2009
Question

Describe different types of broadcast video standards

Subject Computer Graphics and Multimedia
NU Year 2009
Question

Explain in short the HDTV and DVI standards.

Subject Computer Graphics and Multimedia
NU Year 2009
Question

Figure out the abstract views of a computer system and describe the importance of operating system.

Subject Operating System
NU Year 2015
Question

Mention major functions of operating system in regard to process management.

Subject Operating System
NU Year 2015
Question

Write down the advantages of multi programming system.Define spooling.

Subject Operating System
NU Year 2015
Question

Define system call. Mention major categories of system calls with examples.

Subject Operating System
NU Year 2015
Question

Explain the virtual machine structure of operating system with its advantages and disadvantages.

Subject Operating System
NU Year 2015
Question

What is process? Describe the operation of different process states with diagram.

Subject Operating System
NU Year 2015
Question

What does ‘PCB’ stand for? Mention the types of process-specific information associated with PCB.

Subject Operating System
Question

What do you understand about "Context Switch" and "IPC"?

Subject Operating System
NU Year 2015
Question

Write down the main criteria of scheduling algorithms.

Subject Operating System
NU Year 2015
Question

What are the differences between preemptive and non-preemptive scheduling?

Subject Operating System
NU Year 2015
Question

What do you mean by dispatcher?

Subject Operating System
NU Year 2015
Question

Consider the following set of processes. with the length of the CPU-burst time given in milliseconds


                                     Process                   Burst Time               Priority

                                         p1                               10                           3

                                         p2                                1                            1

                                         p3                                2                            3

                                         p4                                1                            4

                                         p5                                5                            2

The process are assume to have arrived in order p1 , p2 , p3 , p4 , p5 all at time 0

Subject Operating System
NU Year 2015
Question

What is object-oriented programming? How it is different from the procedure-oriented programming?

Subject Object Oriented Programming
NU Year 2015
Question

List few areas of application of OOP technology.

Subject Object Oriented Programming
NU Year 2015
Question

Describe the major parts of a C++ program.

Subject Object Oriented Programming
NU Year 2015
Question

What do you mean by dynamic initialization of a variable? Give an example?

Subject Object Oriented Programming
NU Year 2015
Question

What are the advantages of using new operator as compared to function malloc ()

Subject Object Oriented Programming
NU Year 2015
Question

What do you mean by overloading of a function? When do we use this concept? Describe with an example.

Subject Object Oriented Programming
NU Year 2015
Question

What is friend function? When do we declare a function as friend function?

Subject Object Oriented Programming
NU Year 2015
Question

What do you mean by polymorphism in C++? How is polymorphism achieved at compile time and run time?

Subject Object Oriented Programming
NU Year 2015
Question

How memory allocated for objects?-Explain

Subject Object Oriented Programming
NU Year 2015
Question

Write a program that swapping private data of classes using friend function.

Subject Object Oriented Programming
NU Year 2015
Question

What is a constructor? How is constructor overloaded?

Subject Object Oriented Programming
NU Year 2015
Question

What is a class? How does it accomplish data hiding?

Subject Object Oriented Programming
NU Year 2015
Question

Write a program that overloads the + operator using an operator + ( ) function.

Subject Object Oriented Programming
NU Year 2015
Question

what are the different form of inheritance ? Give an example for each

Subject Object Oriented Programming
NU Year 2015
Question

We know that a private member of a basic class  is not inheritable . Is it any way possible for the objects of a derived class to access the private members of the basic class? If yes how? Remember bare class can not be modified

Subject Object Oriented Programming
NU Year 2015
Question

How do the properties of the following two derived classes differ?

(a) Class D1 private B (11-----);

(b) Class D2 private B (11-----)

Subject Object Oriented Programming
NU Year 2015
Question

What is a virtual base class? When do we make a class virtual?

Subject Object Oriented Programming
NU Year 2015
Question

When do we use the protected visibility specifier to a class member?

Subject Object Oriented Programming
NU Year 2015
Question

What does this pointer point to? What are the applications of this pointer?

Subject Object Oriented Programming
NU Year 2015 2010
Question

What is a virtual function?Why do we  need virtual functions?

Subject Object Oriented Programming
NU Year 2015 2010
Question

How do the following two statement differ in operation?
(i) Cin >> C;
(ii) Cin get (C).

Subject Object Oriented Programming
NU Year 2015
Question

Write a program that reads a text file and creates another file that is identical except that every sequence of consecutive blank spaces is replaced by a single space

Subject Object Oriented Programming
NU Year 2015
Question

Distinguish between Java and C+

Subject Object Oriented Programming
NU Year 2015
Question

What is a stream? Describe briefly the features of I/O system supported by C++

Subject Object Oriented Programming
NU Year 2015
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