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1

Tuple relational calculus
can someone give me a explanation of how any divide query in relational algebra be written using tuple calculus(using implication) . thanks in advance

asked 1 hour ago in Databases by chetan raghav (19 points) | 2 views

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2

Madeasy workbook

asked 1 hour ago in Digital Logic by shefali1 Junior (527 points) | 2 views

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3

linkedlist_made easy question
ans givn in B but i think it should be D [closed]

asked 4 hours ago in Programming by Meenakshi Sharma Loyal (3.6k points) | 3 views

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4

[Engineering maths] Linear homogeneous system of equation

asked 5 hours ago in Linear Algebra by rahul sharma 5 Loyal (4.8k points) | 4 views

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5

[Engineering Mathematics]
In system of Linear equations Ax=B, where A is m*n ,which of the following is/are true? a:) If b=0, and m=n,then only trivial solution is possible. b:) If b=0, and m=n,then always trivial solution is possible. c:)If b=0 ... If b=0,and m<n ,then only non-trivial solution possible. d:)If b=0,and m>n ,then only non-trivial solution possible.

asked 5 hours ago in Linear Algebra by rahul sharma 5 Loyal (4.8k points) | 3 views

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1 answer

6

RELATIONAL ALGEBRA
What is the output of below question please draw table according to question.

asked 6 hours ago in Databases by learner_geek (451 points) | 4 views

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1 answer

7

TESTBOOK TEST

asked 6 hours ago in Set Theory & Algebra by Koushik Sinha 2 (13 points) | 5 views

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8

Gate 2018 schedule
I am not able to study for gate 2018 I have resources,time, environment, completed all the subjects while preparing for gate 2017 How do I overcome this

asked 8 hours ago in Revision by ck (41 points) | 14 views

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2 answers

9

oprator in C
anyone explain this prog?? how to output is evaluvated?? int main() { int x = 10, y; y = (x++, printf("x = %d\n", x), ++x, printf("x = %d\n", x), x++); printf("y = %d\n", y); printf("x = %d\n", x); return 0; }

asked 8 hours ago in Programming by Hira Thakur Boss (5.7k points) | 51 views

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1 answer

10

CARTESIAN PRODUCT
Which one is correct (a) or (b).if no one is correct give correct table for R*S

asked 8 hours ago in Databases by learner_geek (451 points) | 7 views

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11

Memory management
If a virtual memory system has 4 pages in real memory and rest must be swapped to disk.which of the following is the hit ratio for the following page address stream? Assume that memory starts empty .use the first in first out(FIFO) algorithm. (a) 10% (b) 15% (C) 25% (d) 31%

asked 10 hours ago in Operating System by alokraj1142 (59 points) | 10 views

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1 answer

12

asked 13 hours ago in Algorithms by atul_21 (49 points) | 9 views

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1 answer

13

NPTEL video
for solving a critical section problem we have software as well as hardware solutions. But what is the difference between both? why is the name hardware solution used when there is no "hardware" involved ?

asked 14 hours ago in Operating System by aditya kuppa 1 (69 points) | 11 views

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4 answers

14

c programming
what is the o/p #include<stdio.h> void main() { int a=5; printf("%d %d %d",a++,++a,--a); } also suggest me notes so i can clear my concept about printf function (For Gate)

asked 16 hours ago in Programming by Nitesh Choudhary Junior (915 points) | 41 views

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1 answer

15

Security and protection
At a single terminal CPU ,if 40% of all users have no wait to use ,terminal and the average wait time for all users is 50 minutes ,then what is the average wait time for those who wait?(Round off to the closest answer) (a) 70 (b) 80 (c) 90 (d) 100

asked 17 hours ago in Operating System by alokraj1142 (59 points) | 8 views

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1 answer

16

Test Series
Consider the following function Worst case complexity of fun() ?

asked 1 day ago in Algorithms by atul_21 (49 points) | 32 views

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1 answer

17

GATE 2013 EC-A-27
Let A be an mxn matrix and B an nxm matrix. It is given that determinant ( Im + AB ) = determinant ( In + BA ) , where Ik is the k k identity matrix. Using the above property, the determinant of the matrix given below is $\begin{bmatrix} 2& 1& ... 1& 1\\ 1& 1& 2& 1\\ 1& 1& 1& 2 \end{bmatrix}$ A) 2 B) 5 C) 8 D) 16

asked 1 day ago in Linear Algebra by the.brahmin.guy (275 points) | 24 views

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18

AAI , JE (information technology) INTERVIEW

asked 1 day ago in Others by Rupendra Choudhary Active (1.3k points) | 28 views

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19

Doubt
CAn we build compiler without "syntax analyser" ?

asked 1 day ago in Compiler Design by Angkit Active (1.9k points) | 17 views

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1 answer

20

ACE Practice book DBMS
Participation Constraints can not be represented for a. Unary relationships b. Binary relationships c. Ternary relationships d. None

asked 1 day ago in Databases by Arnab Bhadra Loyal (3.1k points) | 30 views

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2 answers

21

ugc net Aug 2016
50. Consider a system which have ‘n’ number of processes and ‘m’ number of resource types. The time complexity of the safety algorithm, which checks whether a system is in safe state or not, is of the order of : (1) O(mn) (2) O(m2 n 2 ) (3) O(m2 n) (4) O(mn2 )

asked 1 day ago in Others by kavikeve (69 points) | 18 views

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3 answers

22

Time complexity of quick sort when we take pivot as the middle element

asked 1 day ago in Algorithms by Swati verma (17 points) | 22 views

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1 answer

23

PRECEDENCE GRAPH
I am getting answer 3 if i am wrong please let me correct.

asked 1 day ago in Databases by learner_geek (451 points) | 15 views

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1 answer

24

DMA Concept
reference to this pdf :http://gateoverflow.in/?qa=blob&qa_blobid=13639721099184478126 Can any one define in simple terms X μsec =data transfer time or preparation time (words/block) ? Y μsec =memory cycle time or cycle time or transfer time (words/block) ?

asked 1 day ago in CO & Architecture by hem chandra joshi (345 points) | 16 views

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0 answers

25

BASIC DOUBT IN DBMS
Is there any difference between abort,kill and roll back?

asked 1 day ago in Databases by learner_geek (451 points) | 13 views

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1 answer

26

STRICT SCHEDULE
Which one is correct Give reasons why select and why don't select.

asked 1 day ago in Databases by learner_geek (451 points) | 16 views

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1 answer

27

Doubt
Where is reduce-reduce conflict here?Plz explain S→S S→SS∣a∣ϵ

asked 1 day ago in Compiler Design by Angkit Active (1.9k points) | 26 views

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1 answer

28

Relational midrl
It is mention in navathe page no 67 6th edition that A super key can have redundant attribute..then what is benfit of redundant attribute??

asked 1 day ago in Databases by Ravi prakash pandey (17 points) | 14 views

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1 answer

29

Finding the second element neither minimum nor maximum

asked 1 day ago in Algorithms by gari (83 points) | 40 views

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0 answers

30

P2NETdec2013(46)
Consider a preemptive priority based scheduling algorithm based on dynamically changing priority. Larger priority number implies higher priority. When the process is waiting for CPU in the ready queue (but not yet started execution), its priority changes at a rate a = 2. When it starts running ... 8 (B) 8, 2, 7 and 5 (C) 2, 5, 7 and 8 (D) 8, 2, 5 and 7

asked 1 day ago in Operating System by mahalakshmi r (21 points) | 13 views

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