CS601- Data Communication Solved Midterm Papers Spring 2010

MIDTERM  EXAMINATION

Spring 2010

CS601- Data Communication

Time: 60 min

Marks: 40

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Q No.	1	2	3	4	5	6	7	8	Total
Marks
Q No.	9	10	11	12	13	14	15	16
Marks
Q No.	17	18	19	20	21	22	23	24
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Q No.	25	26
Marks

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

The information to be communicated in a data communications system is the

       ► Medium

       ► Protocol

       ► Message

       ► Transmission

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

Which is not an element of protocol

       ► semantics

       ► timing

       ► communication service module

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

Line configuration refers to the way two or more devices attach to a ______.

       ► Link

       ► Circuit

       ► Route

       ► Node

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

_________requires the maximum number of I/O ports.

       ► Bus

       ► Star

       ► Mesh

       ► Ring

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

Which topology requires a central controller or hub?

       ► Mesh

       ► Star

       ► Bus

       ► Ring

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

Layers 5, 6 and 7 also called as network support layers.

       ► True

       ► False

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

Internet with small “i” specifies the world wide Network the actual internet.

       ► True

       ► False

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

Data link layer deals with mechanical and electrical specifications of transmission medium and interface

       ► True

       ► False

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

Data synchronization is a function related with ___________

       ► session layer

       ► presentation layer

       ► transport

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

OSI model was developed prior to TCP/IP model.

       ► True

       ► False

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

Fourier transform tells us that any digital signal can be decomposed into infinite number of periodic signals

       ► True

       ► False

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

A signal that repeats a pattern over a regular interval of time is called_______.

       ► periodic signal

       ► analog signal

       ► composite signal

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

Frequency band in which 99% of the total power resides is called_______

       ► power bandwidth

       ► half power bandwidth

       ► 3dB bandwidth

       ► F.M.

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

In differential Manchester we require two transition or signal changes to represent binary_____

       ► zero

       ► one

       ► both zero and one

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

In Alternate mark inversion the term mark comes from_________

       ► telegraphy

       ► telephony

       ► digital telephony

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

A 56k modem can download at a rate of __________ Kbps and upload at a rate of __________ Kbps.

       ► 33.6: 33.6

       ► 33.6: 56.6

       ► 56.6: 33.6

       ► 56.6: 56.6

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

The bit rate always equals the baud rate in which type of signal?

       ► FSK

       ► QAM

       ► 4-PSK

       ► PSK

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

Asynchronous transmission is ___________

       ► slow

       ► costly

       ► non-effective

       ► fast

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

At the ______________layer, a DCE takes data generated by a DTE.

       ► physical

       ► transport

       ► data link

       ► application

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

_________ requires more bandwidth.

       ► FSK

       ► ASK

       ► PSK

       ► QAM

Question No: 21      ( Marks: 2 )

Define Sampling Rate.

Question No: 22      ( Marks: 2 )

Write down the types of digital to analog modulation.

Question No: 23      ( Marks: 3 )

What is periodic signal?

Question No: 24      ( Marks: 3 )

How bandwidth of a Modem is measured?

Question No: 25      ( Marks: 5 )

Briefly describe Rerturn to Zero (RZ) encoding scheme?

Question No: 26      ( Marks: 5 )

Compare Phase Modulation(PM) with Frequency Modulation(FM)?

Spring 2009 CS201- Introduction to Programming Complete Solved Midterm Paper

MIDTERM  EXAMINATION

Spring 2009 CS201- Introduction to Programming

www.allvupastpapers.blogspot.com

Question No: 1      ( Marks: 1 ) - Please choose one_______

There are mainly------------------- types of software

►Two

►Three

►Four

►Five

Software is categorized into two main categories

o System Software

o Application Software

Question No: 2      ( Marks: 1 ) - Please choose one____

In C/C++ the #include is called,

►Header file

►Preprocessor Directive

►Statement

►Function

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Question No: 3      ( Marks: 1 ) - Please choose one___________

&& is------------------ operator.

►An arithmetic

►Logical

►Relational

►Unary

we use logical operators ( && and || ) for AND and OR respectively with relational operators.

Question No: 4      ( Marks: 1 ) - Please choose one_______

In flow chart, the symbol used for decision making is,

►Rectangle

►Circle

►Arrow

►Diamond

Question No: 5      ( Marks: 1 ) - Please choose one______

The correct syntax of do-while loop is,

►(condition ) while; do { statements; };

►{ statements; } do-while ();

►while(condition); do { statements; };

►do { statements; } while (condition);

Question No: 6      ( Marks: 1 ) - Please choose one___________

C++ views each file as a sequential stream of________________ .

►Bytes

►Bits

►0’s or 1’s

►Words

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Question No: 7      ( Marks: 1 ) - Please choose one__________________

If the elements of an array are already sorted then the useful search algorithm is,

►Linear search

►Binary search

►Quick search

►Random search

In binary search algorithm, the ‘divide and conquer’ strategy is  applied.

This plies only to sorted arrays in ascending or descending order.

Question No: 8      ( Marks: 1 ) - Please choose one___________

The address operator (&) can be used with,

►Statement

►Expression

►Variable

►Constant

Question No: 9      ( Marks: 1 ) - Please choose one_______________

When a pointer is incremented, it actually jumps the number of memory addresses

►According to data type

►1 byte exactly

►1 bit exactly

►A pointer variable can not be incremented

Question No: 10      ( Marks: 1 ) - Please choose one______________

Each pass through a loop is called a/an

►enumeration

►iteration

►culmination

►pass through

Question No: 11      ( Marks: 1 ) - Please choose one_____________

Call by reference mechanism should be used in a program when there is

i. large amount of data to be passed

ii. small amount of data to be passed

iii. need to change the passed data

iv. no need to change the passed data

Choose the appropriate option for the above case.

► (i) and (ii) only

►(i) and (iii) only

►(ii) and (iii) only

►(ii) and (iv) only

Question No: 12      ( Marks: 1 ) - Please choose one________

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Which of the following is the starting index of an array in C++?

►0

►1

►-1

►any number

Question No: 13      ( Marks: 1 ) - Please choose one________

The return type of a function that do not return any value must be __________

►int

►void

►double

►float

Question No: 14      ( Marks: 1 ) - Please choose one_________

Which of the following is an extension of header file?

►.exe

►.txt

►.h

►.c

Question No: 15      ( Marks: 1 ) - Please choose one__________

We want to access array in random order which approach is better?

►Pointers

►Array index

►Both pointers and array index are better

►None of the given options.

Question No: 16      ( Marks: 1 ) - Please choose one____________

When we declare a multidimensional array the compiler store the elements of multidimensional array in the form of,

►Columns

►Rows

►Contiguous memory location

►Matrix

Question No: 17      ( Marks: 1 )__________

What is the output of the following program?

#include iostream.h

main ( ) {

int RollNo;

int rollno;

RollNo = 5;

rollno = 8;

cout << “Roll No is ” << rollno; }

Program should not compile due to missing <> from following statement

#include iostream.h

if we ignore this then output should be

Roll No is 8

Question No: 18      ( Marks: 1 )_____________________

Why we include iostream.h in our programs?

Because standard stream handling function are stored in this file. Before using these function in our program it is necessary to tell compiler about the location of these functions.

Question No: 19      ( Marks: 2 )

Find out error in the code given below:

if ( num % 2 = 0 )

cout << "The number is even" << endl;

if ( num % 2 = 0 ) There should be extra = sign following is right statement

if ( num % 2 = =0 )

Question No: 20      ( Marks: 3 )

How learning to design programs is like learning to play soccer?

“Learning to design programs is like learning to play soccer. A player must learn to trap a ball, to dribble with a ball, to pass, and to shoot a ball. Once the player knows those basic skills, the next goals are to learn to play a position, to play certain strategies, to choose among feasible strategies, and, on occasion, to create variations of a strategy because none fits. “

Question No: 21      ( Marks: 5 )

Write the procedure of data insertion in middle of the files by Merge Method practiced in older systems?

· Opened the data file and a new empty file.

· Started reading the data file from beginning of it.

· Kept on copying the read data into the new file until the location we want to insert data into is reached.

· Inserted (appended) new data in the new file.

· Skipped or jumped the data in the data file that is to be overwritten or replaced.

· Copied (appended) the remaining part of the file at the end of the new file

Question No: 22      ( Marks: 10 )

Write a recursive function that takes three arguments (an integer array, starting subscript ‘s’ and

ending subscript ‘e’ ).

In first recursive call, the function should display the array from subscript ‘s’ (s = 0) to ‘e’ (e =

size of array). In each successive call, the function should print the array from index s+1 to e. T

function should stop processing and return when starting subscript becomes equal to ending

subscript.

For example, if user enters values for array 2, 3, 4, 5, 6 then the recursive function must display the following output.

2 3 4 5 6

3 4 5 6

4 5 6

5 6

6

answer

#include <iostream.h>;

void PrintArray(int arrayInput[], int &s, int &e);

main ( )

{

int pause;

int TestArray [6] = {1,2,3,4,5,6};

int StartPoint = 0;

int EndPoint = 5;

PrintArray(TestArray , StartPoint, EndPoint);

cout<<"\n";

PrintArray(TestArray , StartPoint, EndPoint);

cout<<"\n";

PrintArray(TestArray , StartPoint, EndPoint);

cout<<"\n";

PrintArray(TestArray , StartPoint, EndPoint);

cout<<"\n";

PrintArray(TestArray , StartPoint, EndPoint);

cout<<"\n";

PrintArray(TestArray , StartPoint, EndPoint);

cin >> pause;

}

void PrintArray(int arrayInput[], int& s, int& e)

{

for (int i = s; i<= e; i++)

{

cout<<  arrayInput[i];

}

s=s+1;

}

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