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Questions by Dexter

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1

Database
Given R (ABCDE) A-->BC,CD->E B->D E->A CONVERT GIVEN INTO 1NF 2NF 3NF AND THEN BCNF PLEASE VERIFY :)

asked in Databases Dec 2, 2016

304 views

0 votes

1 answer

2

Database
Given R (ABCDE) FDS ARE A-->BC,C-->DE, D-->E R1(ABCD) R2(DE) FIND WHETHER ITS DECOMPOSITION IS VALID OR NOT and Fd preserving too

asked in Databases Dec 2, 2016

254 views

1 vote

1 answer

3

Aptitude
A with the help of a son can do a work in 10days . They start together and after 6 days his son left the work . Then remaining work will be done by A in 8 days . Then A alone would do work in how many days ? verify please :)

asked in Quantitative Aptitude Nov 24, 2016

343 views

2 votes

1 answer

4

asked in CO and Architecture Nov 23, 2016

1.4k views

0 votes

1 answer

5

Kenneth Rosen Edition 6th Exercise 6.6 Question 26 (Page No. 457)
How many derangements of (1 2 3 4 5 6 ) end with integer 1 2 and 3 in some order ?

asked in Combinatory Oct 21, 2016

2.7k views

2 votes

1 answer

6

Kenneth Rosen Edition 6th Exercise 6.6 Question 3 (Page No. 456)
How many solution does the equation x1+x2+x3=13 have where x1 x2 and x3 are non negative less than 6 ?

asked in Combinatory Oct 21, 2016

601 views

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0 answers

7

Kenneth Rosen Edition 6th Exercise 5.5 Question 44 b (Page No. 381)
. In how many ways can a dozen books be placed on four distinguishable shelves if no two books are the same, and the positions of the books on the shelves matter?

asked in Combinatory Oct 16, 2016

716 views

5 votes

1 answer

8

Combinatorics
A proffesor writes 40 discrete mathematics true/false question . of the statements in these question 17 are true . if the question can be positioned in any order . then how many diff key are possible ?

asked in Combinatory Oct 11, 2016

1.1k views

1 vote

1 answer

9

Counters design
Design a counter using D flip flops that goes through state 0 1 2 4 0 . The undesired (unused ) states must always goes to zer0 (000) on the next clock pulse .

asked in Digital Logic Aug 19, 2016

4.8k views

1 vote

1 answer

10

Logic basic
Express the quantification ∃!xP(x) using Universal , Existential Quantification and Logical Connectives

asked in Mathematical Logic May 17, 2016

400 views

1 vote

1 answer

11

logic basic
Express each of these statements using qunatifers .Then form the negation of the statement so that no negation is to left of a quantifier , Next Express the negation is in Simple English (Do not simplify the words "it is the not case that ") ... ) Some students have solved every excercise in this book 5) No student has solved atleast one exercise in every section of this book

asked in Mathematical Logic May 17, 2016

813 views

1 vote

1 answer

12

Logic basic
Express each of the sentences using predicates , quantifier logical connectives and mathematical operations where the domain consists of all integers 1) The product of 2 negative number is positive 2) The average of 2 positive integers is positive 3) The difference ... negative 4) The absolute value of the sum of integers does not exceed The sum of the absolute values of these integers

asked in Mathematical Logic May 17, 2016

1.3k views

0 votes

1 answer

13

Logic basic
Express each of these system specification using predicates , quantifier and logical connectives if necessary 1) At least one console must be accessible during every fault condition 2) The email address of every user can be retrived whenever the archieve contain ... the network 5) No one knows the password of every user on the system except system administrator who knows all passwords

asked in Mathematical Logic May 17, 2016

2.3k views

1 vote

1 answer

14

logic basic
Let I (X) be the statement such as "X has an internet correction " and C(x,y) be the statemenet such as x and y have chatted over the internet where the domain x and y consists for all students in your class. Express each statement using ... with everyone in your class over the Internet 13) there are atleast 2 student in your class who have not chatted with th same student

asked in Mathematical Logic May 17, 2016

920 views

2 votes

1 answer

15

Logic basic
Let F (x,y) be the statement such as x can fool y .where the domain consists of all people in world . Express following statement using quantifiers Express following statement using quantifiers 1) Everybody can fool fred 2) Evelyn can fool everybody 3)Everybody ... 9) non one can fool himself or herself 10 ) There is someone who can fool exactly one person beside himself or herself

asked in Mathematical Logic May 17, 2016

4.2k views

1 vote

1 answer

16

Logic basic
Let Q(x,y) be the statement "Student x has been a contestant on quiz show y " Express each of these statement in terms of Q(x,y) , quantifiers and logical connectives 1)There is a student at your school who has been a contestant on ... your school who has been a contestant on jeopardy and Wheel of fortune 4)Atleast 2 studnet from your school have been contestant on Jeopardy

asked in Mathematical Logic May 16, 2016

1.3k views

0 votes

1 answer

17

Logic basic
Let T (x,y) mean that student x like cuisine y where the domain for x consists off all students at your school and domain for y consists of all cuisines. Express the following in English statement ∀x∀y∃y((x!=z)-----> &sim;(T(x,y) ⋀ T(z,y)))

asked in Mathematical Logic May 16, 2016

388 views

1 vote

1 answer

18

Logic Basic
How will you translate following expression into English statement Let C(x,y) mean that student x is enrolled in class y where the domain x consists of all students in your class and domain y consists of all class beign given at your school ∃x∃y∀z((x!=y) ⋀ (C(x,z)-->C(y,z)))

asked in Mathematical Logic May 16, 2016

403 views

1 vote

2 answers

19

logic basic
Let P(x) , Q(x) and R(x) be the statements "x is a clear explantion " , "x is satisfactory " and "x is an excuse " resp Suppose that the domain x consists of all English text Express each of these using ... All clear explanation are satisfactory 2) Some excuses are unsatisfactory 3) Some excuses are not clear explanation 4) does 3 follow from 1and 2

asked in Mathematical Logic May 16, 2016

506 views

1 vote

1 answer

20

Logic basic
What is truth value of the following statement ? ∃!x P(x) --->∼ ∀xP(x)

asked in Mathematical Logic May 16, 2016

218 views

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