Tuesday, 17 January 2017

M4.1-R4 Application of .NET Technology January 2016

January, 2016 M4.1-R4: APPLICATION OF .NET TECHNOLOGY


PART ONE

(Answer all the questions)


1. Each question belo w gives a mu ltiple 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 Which of the follo wing utilities can be used to compile managed assemblies in to processorspecific
native code?
A) Gacutil
B) nge n
C) dumpbin
D) ildasm
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NIELIT O Level Dot Net Previous Paper


NIELIT O Level Dot Net Previous Paper

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Monday, 16 January 2017

UGC Net Computer Science Paper II Dec 13 Page 4 Solved

UGC Net Computer Science Paper II Dec 13 Page 4 Solved

UGC Net Computer Science Paper II Dec 13 Page 4 Solved

31. The dual of a Boolean expression is obtained by interchanging
(A) Boolean sums and Boolean products
(B) Boolean sums and Boolean products or interchanging 0’s and 1’s
(C) Boolean sums and Boolean products and interchanging 0’s & 1’s
(D) Interchanging 0’s and 1’s
Answer C
Explanation :-
Dual of a Boolean expression
The duality principle ensures that "if we exchange every symbol by its dual in a formula, we get the dual result".
(a) 0 . 1 = 0: is a true statement asserting that "false and true evaluates to false"

(b) 1 + 0 = 1: is the dual of (a): it is a true statement asserting that "true or false evaluates true."

(c) 1 . 1 = 1: it is a true statement asserting that "true and true evaluates to true".

(d) 0 + 0 = 0: (d) is the dual of (c): it is a true statement asserting, correctly, that "false or false 

More example
F1 = x'yz' + x' y' z
The dual of F1 is : ( x' + y + z' ) ( x' + y' + z )
Complement each literal : F1' = ( x + y' + z ) ( x + y + z' )
F2 = x ( y' z' + yz )
The dual of F2 is x + ( y' + z' ) ( y + z )
Complement each literal: F2' = x' + ( y + z ) ( y' + z' )  

Product of Sums (POS)

A boolean expression consisting purely of Maxterms (sum terms) is said to be in canonical product of sums form.
Example
Lets say, we have a boolean function F defined on two variables A and B. So, A and B are the inputs for F and lets say, output of F is true i.e., F = 1 when only one of the input is true or 1.
now we draw the truth table for F


Now we will create a column for the maxterm using the variables A and B. If input is 1 we take the complement of the variable and if input is 0 we take the variable as is.


To get the desired canonical POS expression we will multiply the maxterms (sum terms) for which the output is 0.
F = (A+B) . (A’+B’)
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UGC Net Computer Science Paper II Dec 13 Page 3 Solved

 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 + - *
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