UGC Net Computer Science Paper II Dec 13 Page 3 Solved

 

UGC Net Computer Science Paper II Dec 13 Page 3 Solved

21. What is the value of the postfix expression ?

a b c d + – ∗ (where a = 8, b = 4,

c = 2 and d = 5)

(A) –38

(B) –83

(C) 24 

(D) –24

Answer D

Explanation :-

Algorithm for evaluation postfix expressions.

1) Create a stack to store operands (or values).

2) Scan the given expression and do following for every scanned element.

a) If the element is a number, push it into the stack

b) If the element is a operator, pop operands for the operator from stack.

           ​Evaluate the operator and push the result back to the stack 

3) When the expression is ended, the number in the stack is the final answer

 Postfix Expression=a b c d + - *

UGC Net Computer Science Paper II Dec 13 Page 2

UGC Net Computer Science Paper II Dec 13 Page 2 Solved

11. The student marks should not be greater than 100. This is

(A) Integrity constraint

(B) Referential constraint

(C) Over-defined constraint

(D) Feasible constraint

Answer A

Explanation :-

Before one can start to implement the database tables, one must define the integrity constraints. Intergrity means something like 'be right' and consistent. The data in a database must be right and in good condition.

There are the domain integrity, the entity integrity, the referential integrity and the foreign key integrity constraints.

Domain Integrity

Domain integrity means the definition of a valid set of values for an attribute. You define 

data type, 

• lenght or size
• is null value allowed
• is the value unique or not
• for an attribute.

UGC Net Computer Science Paper II Dec 13 Page 1

UGC Net Computer Science Paper II Dec 13 Page 1

1. When data and acknowledgement are sent in the same frame, this is called as

(A) Piggy packing

(B) Piggy backing

(C) Back packing

(D) Good packing

Answer B

Explanation :-

he usual purpose of piggybacking is simply to gain free network access rather than any malicious intent, but it can slow down data transfer for legitimate users of the network. Furthermore, a network that is vulnerable to piggybacking for network access is equally vulnerable when the purpose is data theft, dissemination of viruses, or some other illicit activity.


It's quite simple to access an unsecured wireless network: All you have to do is get into the range of a Wi-Fi hotspot's signal and select your chosen network from the options presented. However, unauthorized network access, even to free Wi-Fi, may be illegal. People have been fined for accessing hot spots from outside businesses, such as coffee shops, that provide free Wi-Fi for customers' use. (http://whatis.techtarget.com/)

2. Encryption and Decryption is

UGC Net Computer Science First Paper December-13 Page-1

UGC Net Computer Science First Paper December-13 Page-1

1. Which is the main objective of research ?

(A) To review the literature

(B) To summarize what is already known

(C) To get an academic degree

(D) To discover new facts or to make fresh interpretation of known facts

Answer D

UGC Net Computer Science Paper 1 December 12 , Page 6 Solved

UGC Net Computer Science Paper 1 December 12 , Page 6 Solved

51. Which of the following sampling methods is based on probability ?

(A) Convenience sampling

(B) Quota sampling

(C) Judgement sampling

(D) Stratified sampling

Answer D

Explanation :-

Convenience Sample 

A convenience sample is one of the main types of non-probability sampling methods. A convenience sample is made up of people who are easy to reach.

Consider the following example. A Company interviews shoppers at a local mall. If the mall was chosen because it was a convenient site from which to solicit survey participants and/or because it was close to the Company 's home or business, this would be a convenience sample.

Quota Sampling

A sampling method of gathering representative data from a group. As opposed to random sampling, quota sampling requires that representative individuals are chosen out of a specific subgroup. For example, a researcher might ask for a sample of 100 females, or 100 individuals between the ages of 20-30.

Judgment Sample 

Judgment sample is a type of nonrandom sample that is selected based on the opinion of an expert. Results obtained from a judgment sample are subject to some degree of bias, due to the frame and population not being identical. The frame is a list of all the units, items, people, etc., that define the population to be studied.

For example, when interviewing manufacturers in the pharmaceutical industry to determine their preferred brand of equipment, the schedules, availability and willingness of the possible subjects are taken into account. Rather than performing random sampling and selecting subjects who are unavailable, an expert employs judgment sampling and selects units whose availability and attitude are compatible with the study.

Stratified Sampling

Stratified sampling refers to a type of sampling method . With stratified sampling, the researcher divides the population into separate groups, called strata. Then, a probability sample (often a simple random sample ) is drawn from each group.

Stratified sampling has several advantages over simple random sampling. For example, using stratified sampling, it may be possible to reduce the sample size required to achieve a given precision. Or it may be possible to increase the precision with the same sample size.

UGC Net Computer Science Paper 1 December 12 , Page 5-Solved

UGC Net Computer Science Paper 1 December 12 , Page 5-Solved

41. Which of the following can be done under conditions of financial emergency ?

1. State Legislative Assemblies can be abolished.

2. Central Government can acquire control over the budget and expenditure of States.

3. Salaries of the Judges of the High Courts and the Supreme Court can be reduced.

4. Right to Constitutional Remedies can be suspended. Select the correct answer from the codes given below :

Codes :

(A) 1, 2 and 3 

(B) 2, 3 and 4

(C) 1 and 2 

(D) 2 and 3
Answer D

UGC Net Computer Science Paper 1 December 12 , Page 4-Solved

UGC Net Computer Science Paper 1 December 12 , Page 4-Solved

31. Which of the following is a source of methane ?

(A) Wetlands

(B) Foam Industry

(C) Thermal Power Plants

(D) Cement Industry

Answer A

UGC Net Computer Science Paper 1 December 12 , Page 3-Solved

25. ALU stands for
(A) American Logic Unit
(B) Alternate Local Unit
(C) Alternating Logic Unit
(D) Arithmetic Logic Unit
Answer : D

26. A Personal Computer uses a number of chips mounted on a circuit board called

(A) Microprocessor

(B) System Board

(C) Daughter Board

(D) Mother Board

Answer : A

UGC Net Computer Science December-12 Paper 3 Page 3 Solved

UGC Net Computer Science December-12 Paper 3 Page 3 Solved

21. How many solutions do the following equation have

x1 + x2 + x3 = 11

where x1 ≥ 1, x2 ≥ 2, x3 ≥ 3

(A) C(7, 11)

(B) C(11, 3)

(C) C(14, 11)

(D) C(7, 5)

Answer D

Explanation :-

we can solve this problem by combinition with repetition.

so we need to put 11 similar balls into  x1,x2,x3 types of boxes.

different number of boxes are 3=n

x1≥1, x2≥2, x3≥3 now allocate 1,2,3 from 11 directly . so remaining  ball = 11-(1+2+3) = 5 =k

(n+k-1)Ck  = (3+5-1)C5 =7C5

January 2016 M2-R4: INTERNET TECHNOLOGY AND WEB DESIGN

January 2016 M2-R4: INTERNET TECHNOLOGY AND WEB DESIGN (Solved)

PART ONE

(Answer all the questions)

1. Each question below gives a multiple choice of answers. Choose the most appropriate one and enter in the “OMR” answer sheet supplied with the question paper, following instructions therein. (1x10)

1.1 Protocols are

A) Agreements on how communication components and DTE's are to communicate

B) Logical communication channels for transferring data

C) Physical communication channels sued for transferring data

D) None of the above

View Answer

1.2 Which data communication method is used to transmit the data over a serial communication

link?

A) Simplex

B) Half-duplex

C) Full duplex

D) All of the above

View Answer

UGC Net Computer Science December-12 Paper 3 Page 2

UGC Net Computer Science December-12 Paper 3 Page 2 Solved

11. The time complexities of some standard graph algorithms are given.Match each algorithm with its time complexity ? (n and m are no. of nodes and edges respectively)

a. Bellman Ford algorithm                         1. O (m log n)

b. Kruskals algorithm                                 2. O (n3)       

c. Floyd Warshall algorithm                       3. O(mn)

d. Topological sorting                                4. O(n + m)

Codes :

       a b c d

(A) 3 1 2 4

(B) 2 4 3 1

(C) 3 4 1 2

(D) 2 1 3 4

Answer A

UGC Net Computer Science December-12 Paper 3

UGC Net Computer Science December-12 Paper 3 (Solved)

1. Eco system is a Frame work for

(A) Building a Computer System

(B) Building Internet Market

(C) Building Offline Market

(D) Building Market

Answer B

Explanation : 

A digital ecosystem is a distributed, adaptive, open socio-technical system with properties of self-organisation, scalability and sustainability inspired from natural ecosystems. Digital ecosystem models are informed by knowledge of natural ecosystems, especially for aspects related to competition and collaboration among diverse entities. The term is used in the computer industry, the entertainment industry, and the World Economic Forum.

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VLC crashed on window

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UGC Net Computer Science Paper 1 December 12 , Page 2-Solved

UGC Net Computer Science Paper 1 December 12 , Page 2-Solved

11. The sum of the ages of two persons A and B is 50. 5 years ago, the ratio of their ages was 5/3. The present age of A and B are

(A) 30, 20

 (B) 35, 15

(C) 38, 12

 (D) 40, 10
Answer A
Explanation :-

Equations:
a + b = 50
(a-5)/(b-5) = 5/3
-------
For solve this expression we need to change a with b

a = 50-b

(50-b-5)/(b-5) = 5/3
----
3(45-b) = 5(b-5)
135 - 3b = 5b - 25
8b = 160
b = 20
Then a = 30

12. Let a means minus (–), b means multiplied by (x), C means divided by (/) and D means plus (+). The value of 90 D 9 a 29 C 10 b 2 is

(A) 8 

(B) 10

(C) 12 

(D) 14
Answer Incorrect
Explanation :-
a = -
b = *
c = /
d = +

90 D 9 a 29 C 10 b 2

90 + 9 - 29 / 10 * 2
90+9-2.9*2
90+9-5.8
93.2

Write a program to check whether a number is perfect or not ?

Question : Write a program to check whether a number is perfect or not ?

(A number said to be  perfect if sum of all factor  less than given number then equal to given number)
Input : 6
Output : Perfect Number

Write a program to check whether given number is Magic or not?

Question : Write a program to check whether given number is Magic or not?

A Magic number said to be a magic when we add each digit until its reached less than 10 after that  if value is 1 then number is Magic.

Example :

    28 = 2+8

         =10

     10= 1+0

         =1 

Write a program to find the following pattern ?

Question : Write a program to find the following pattern?

input : Ashok Kumar Yadav
Output: A.K. Yadav

Write a program that accept two string one for main string and second string will store some word and remove this word form main string?

Question : Write a program that accept two string one for main string and second string will store some word and remove this word form main string?

Input : ram is a good boy

Search string : ram good

Output : is a boy

Solution : 

import java.util.*;

Write a program which accept input from user and print the word which has consecutive repeated Character?

Question : Write a program which accept input from user and print the word which has consecutive repeated Character?

Input  :  An apple is banana and banana is apple.

Output : apple,banana,banana,apple

Solution : 

import java.util.*;

Write a program which accept input of full path of a file and produce following output?

Question : Write a program which accept input of full path of a file and produce following output?

Input : C:/Users/Public/Pictures/SamplePictures/Desert.jpg

Output :

Extension : jpg

File Name : Desert

Path : C:/Users/Public/Pictures/SamplePictures

Solution :

UGC Net Computer Science Paper II Dec 12,Page 5 (Solve)

41. Enumeration is a process of
(A) Declaring a set of numbers
(B) Sorting a list of strings
(C) Assigning a legal values possible for a variable
(D) Sequencing a list of operators
Answer C
Explanation : Enumeration is a special datatype which provide an integer number sequence to its member which help to track some common properties with meaning full name instead of number like color names

42. Which of the following mode declaration is used in C++ to open a file for input ?
(A) ios : : app
(B) in : : ios
(C) ios : : file
(D) ios : : in
Answer D
Explanation : ios::in allows input (read operations) from a stream.ios::out allows output (write operations) to a stream.

43. Data Encryption Techniques are particularly used for ______.
(A) protecting data in Data Communication System.
(B) reduce Storage Space Requirement.
(C) enhances Data Integrity.
(D) decreases Data Integrity.
Answer A
Explanation : when we send our data through public network then eavesdropping risk become high So we need some technique which increase security when data is send through public network.

Data encryption translates data into another form, or code, so that only people with access to a secret key (formally called a decryption key) or password can read it. Encrypted data is commonly referred to as ciphertext, while unencrypted data is called plaintext. Currently, encryption is one of the most popular and effective data security methods used by organizations. Two main types of data encryption exist - asymmetric encryption, also known as public-key encryption, and symmet

44. Let L be a set accepted by a non deterministic finite automaton. The number of states in non-deterministic finite automaton is |Q|. The maximum number of states in equivalent finite automaton that accepts L is
(A) |Q|
(B) 2|Q|
(C) 2|Q| – 1
(D) 2|Q|
Answer D
Explanation :In NFA there may be possibility to more than one state transition but in DFA state transition is single direction so about this question if NFA is |Q| then DFA may have 2|Q| state over this type of NFA.

45. What is the result of the following expression ?

(1 & 2) + (3 & 4)

(A) 1
(B) 3
(C) 2
(D) 0
Answer D
Explanation :& is bitmap compare a number at binary level from right to left and operator which return true when all operand is true otherwise false so after evaluate the given expression result become false .

(01 &  10)    +  (011 & 100)

0+0=0

46. Back propagation is a learning technique that adjusts weights in the neural network by propagating weight changes.
(A) Forward from source to sink
(B) Backward from sink to source
(C) Forward from source to hidden nodes
(D) Backward from since to hidden nodes
Answer B

47. Match the following :

a. TTL       1. High fan out
b. ECL      2. Low propagation delay
c. CMOS   3. High power dissipation

Code :
      a    b    c
(A) 3   2    1
(B) 1   2    3
(C) 1   3    2
(D) 3   1    2
Answer A
Explanation : 


a.TTL draws more power => 3

b. ECL has highest speed ; Hence it must have lowest propagation delay =>2

c. CMOS has high fan out =>1

48. ______ is an “umbrella” activity that is applied throughout the software engineering process.

.(A) Debugging

(B) Testing

(C) Designing

(D) Software quality assurance

Answer D
Explanation : 

The umbrella activities in a software development life cycle process include the following:

• Software Project Management
• Formal Technical Reviews
• Software Quality Assurance
• Software Configuration Management
• Re-usability Management
• Risk Management
• Measurement and Metrics

Document Preparation and Production

49. Identify the operation which is commutative but not associative ?

(A) OR

(B) NOR

(C) EX-OR

(D) NAND

Answer D

Explanation :

1)Every logic gate follows Commutative law.

2)AND,OR,Ex-OR,EX-NOR follows Associative law. NAND,NOR doesn`t follow Associative law.

3)AND ,OR follows Distributive law.Ex-OR,EX-NOR,NAND,NOR doesn`t follow Distributive law.AND operation only distributive on EX-OR operation no other operation is distributive including itself.

50. Given a Relation POSITION (Posting-No, Skill), then query to retrieve all distinct pairs of posting-nos. requiring skill is

 (A) Select p.posting-No, p.posting-No from position p 

         where p.skill = p.skill     and p.posting-No < p.posting-No

(B) Select p1.posting-No, p2.posting-No   from position p1, position p2

       where p1.skill = p2.skill

(C) Select p1.posting-No, p2.posting-No  from position p1, position p2 

       where p1.skill = p2.skill   and p1.posting-No < p2.posting-No

(D) Select p1.posting-No, p2.posting-No   from position p1, position p2

      where p1.skill = p2.skill    and p1.posting-No = p2.posting-No

Answer C

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CCC Fundamental and Word MCQ/True-False Solve

  CCC TEST PAPER  

Fundamental and Word             

Time: 1HRS                                              M M: 50 MARK

Objective Question:

 1. sesitive device that convert printed material into its equivalent digital form

 (A)scanner

(B)ocr

 ( C)a and b

(D)None of these

2.The basic architecture for digital computer was developed by

 (A)Bill Gates

 (B)Charles Babbage

( C)John Von Neumann

(D)Garden Moore

UGC Net Computer Science Paper II Dec 12,Page 4 (Solve)

31. Basis path testing falls under
(A) system testing
(B) white box testing
(C) black box testing
(D) unit testing
Answer : B
Explanation : The basis path testing is same, but it is based on a white box testing method, that defines test cases based on the flows or logical path that can be taken through the program. Basis path testing involves execution of all possible blocks in a program and achieves maximum path coverage with least number of test cases. It is a hybrid of branch testing and path testing methods.

The objective behind basis path testing is that it defines the number of independent paths, thus the number of test cases needed can be defined explicitly (maximizes the coverage of each test case).

     

     int a,b;

     for(a=1,b=2;a<=10;a++)

          printf("\n%d",a*b);

Basis Path Testing Diagram

32. The User Work Area (UWA) is a set of Program variables declared in the host program to communicate the contents of individual records between

(A) DBMS & the Host record
(B) Host program and Host record
(C) Host program and DBMS
(D) Host program and Host language
Answer : C
Explanation :A set of program variables, declared in the host program, to communicate the contents of individual records between the DBMS and the host program.

For each record type in the database schema, a corresponding program variable with the same format should be declared in the host program.

UGC Net Computer Science Paper II Dec 12,Page 3 (Solve)

21. Which API is used to draw a circle ?
(A) Circle ( )
(B) Ellipse ( )
(C) Round Rect ( )
(D) Pie ( )
Answer B
Explanation : In mathematics, an ellipse is a curve in a plane surrounding two focal points such that the sum of the distances to the two focal points is constant for every point on the curve. As such, it is a generalization of a circle.
22. In DML, RECONNCT command
cannot be used with
(A) OPTIONAL Set
(B) FIXED Set
(C) MANDATOR Set
(D) All of the above
Answer B
Explanation : The RECONNECT command can be used with both OPTIONAL and MANDATORY sets, but not with FIXED sets. The RECONNECT command moves a member record from one set instance to another set instance of the same set type. It cannot be used with FIXED sets because a member record cannot be moved from one set instance to another under the FIXED constraint.

2-D Array Matrix Multiplication

2-D Array Matrix Multiplication Rule

• Matrix a row must be same as Matrix B column
• Each Cell of Matrix A multiply by each column of matrix B

Code : 

/*   #################################################

          Girfa : Student Help

          Multiplication of 2-d array

          for more program visit : http://girfahelp.blogspot.in/p/c-language-array-programming.html

     #################################################

UGC Net Computer Science Paper 1 December 12 , Page 1-Solved

1. The English word ‘Communication’ is derived from the words
(A) Communis and Communicare
(B) Communist and Commune
(C) Communism and Communalism
(D) Communion and Common sense
Answer : A

2. Chinese Cultural Revolution leader Mao Zedong used a type of communication to
talk to the masses is known as
(A) Mass line communication
(B) Group communication
(C) Participatory communication
(D) Dialogue communication
Answer : A

UGC Net Computer Science Paper II Dec 12 Page 2 (Solved)

UGC Net Computer Science Paper II Dec 12 Page 2 (Solved)

11. In compiler design ‘reducing the strength’ refers to
(A) reducing the range of values of input variables.
(B) code optimization using cheaper machine instructions.
(C) reducing efficiency of program.
(D) None of the above
Answer : B
Explanation :I

n compiler design , strength reduction is a compiler optimization where expensive operations are replaced with equivalent but less expensive operations. The classic example of strength reduction converts "strong" multiplications inside a loop into "weaker" additions – something that frequently occurs in array addressing.

Most of a program's execution time is typically spent in a small section of code (called a hot spot), and that code is often inside a loop that is executed over and over.

A compiler uses methods to identify loops and recognize the characteristics of register values within those loops.

12. In which addressing mode, the effective address of the operand is generated by adding a constant value to the contents of register ?
(A) Absolute
(B) Indirect
(C) Immediate
(D) Index
Answer : D

Write a program to merge two array into a single array?

Q : Write a program to merge two array into a single array?

/*     #################################

           Girfa Student Help

           Merge two Array

           Programmber : Vishal

           For more program visit : http://girfahelp.blogspot.in/p/c-language.html

       #################################

*/

#include<stdio.h>

#include<conio.h>

#define MAX 5

void main()

{

       int a1[MAX],a2[MAX],a3[MAX*2];

       int i,j;

       clrscr();

       puts("First Array Input");

       for(i=0;i<MAX;i++)

Write a program to implement union and intersection?

Q.: Write a program to implement union and intersection?

/*   ##########################

     Girfa : Student Help

     For More Program Visit : http://girfahelp.blogspot.in/p/c-language.html

     Program to implement union and intersection

     ##########################*/

#include<stdio.h>

#include<conio.h>

#define MAX 5

int check_avl(int [],int,int); /* Check a number exist in an array */

void print(int [],int); /* Print an arrar*/

void main()

{

     int ar1[MAX],ar2[MAX],uni[MAX*2],ins[MAX];

     int uni_index,int_index,flag=0,i,j;

     clrscr();

     printf("\nFirst Array Input\n");

     for(i=0;i<MAX;i++)

     {

          printf("Enter %d Position number>> ",i+1);

          scanf("%d",&ar1[i]);

     }

     printf("\nSecond Array Input\n");

     for(i=0;i<MAX;i++)

     {

          printf("Enter %d Position number>> ",i+1);

          scanf("%d",&ar2[i]);

     }

UGC Net Computer Science Paper-1 Page 1

1. The English word ‘Communication’ is derived from the words
(A) Communis and Communicare
(B) Communist and Commune
(C) Communism and Communalism
(D) Communion and Common sense

Core Java Data – Type MCQ

1. What is the range of data type short in Java?

a) -128 to 127

b) -32768 to 32767

c) -2147483648 to 2147483647

d) None of the mentioned

2. An expression involving int, byte with literal numbers then resulting expression will be to which of these?
a) int
b) long
c) byte
d) float

3. Which of the following are legal lines of Java code?
1. int w = (int)888.8;
2. byte x = (byte)1L;
3. long y = (byte)12;
4. byte z = (byte)123L;
a) 1 and 2
b) 2 and 3
c) 3 and 4

UGC Net Computer Science Paper II Dec 12 Page 1 (Solved)

1. Consider the circuit shown below. In a certain steady state, Y is at logical ‘l’.What are possible values of A, B, C ?
(A) A = 0, B = 0, C = 1
(B) A = 0, B = C = 1
(C) A = 1, B = C = 0
(D) A = B = 1, C = 1

Answer A
Explanation : Nand gate behave opposite of and gate so if any 0 in input then result will be 1. So output Y will be 1 if A = 0, B = 0, C = 1

Prepare Statement Select Mysqli

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />

<title>Girfa : My SQLi Tutorial</title>

</head>

<body><?php
$servername = "localhost";
$username   = "root";
$password   = "";
$dbname     = "tmp";

Write a program to copy a file into another file.

Q. Write a program to copy a file into another file?

/*   ###########################

     Girfa : Student Help

     for more program visit : http://girfahelp.blogspot.in/p/c-language.html

     copy a file content to another file

     ############################

*/

#include<stdio.h>

#include<conio.h>

void main()

{

     FILE *sfile,*dfile;

     char ch;

     int flag=1;

     clrscr();

     sfile=fopen("source.txt","r"); /* Source file */

     if(sfile==NULL)

Write a program to find the power of number using function.

Q. Write a program to find the power of number using function.

/*   ###########################

     Girfa : Student Help

     for more program visit : http://girfahelp.blogspot.in/p/c-language.html

     Power of a number using function

     ############################

*/

#include<stdio.h>

#include<conio.h>

int power(int,int);

void main()

{

     int n,p;

     clrscr();

     printf("Enter number>> ");

     scanf("%d",&n);

     printf("Enter Power>> ");

     scanf("%d",&p);

     printf("\n\nPower of %d by %d is %d",n,p,power(n,p));

     getch();

}