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Answers by srivivek95

6 votes

1

LU decomposition
In the LU decomposition of the matrix,$\begin{bmatrix} 1 &2 \\ 3 &8 \end{bmatrix}$ if the diagonal elements of $U$ are both $1$, then the trace of $L$ is$?$

answered in Linear Algebra Jan 13, 2018

2.1k views

25 votes

2

ISRO-DEC2017-8
The number of elements in the power set of $\{\{1,2\},\{2,1,1\},\{2,1,1,2\}\}$ is $3$ $8$ $4$ $2$

answered in Set Theory & Algebra Dec 20, 2017

4.6k views

4 votes

3

B+ tree
Assume a system has following parameters to construct a B+ tree. The specification of the tree are: • Size of search key is 15 B • Size of block is 512 B • Size of record pointer is 9 B • Size of block pointer is 8 B The maximum number of keys that can be accommodated in each non-leaf node of the tree is ________.

answered in Databases Nov 30, 2017

762 views

0 votes

4

Synchronisation OS
Should we consider bounded waiting if there is already a deadlock? I mean to say "If there is deadlock then surely not bounded waiting" is this statement true alway ? Some solutions follow this rule some solutions not. Thanks in advance :)

answered in Operating System Nov 30, 2017

388 views

0 votes

5

Essential prime implicants

answered in Digital Logic Nov 29, 2017

1.8k views

1 vote

6

Normalization
Please explain with example how lossless decomposition into BCNF is possible but dependency preservating BCNF decomposition may not be possible for all relations?

answered in Databases Nov 24, 2017

556 views

0 votes

7

propositional Logic
What is the difference between => and <=> ?

answered in Mathematical Logic Nov 18, 2017

482 views

0 votes

8

graphs and trees conceptual

answered in Graph Theory Nov 18, 2017

258 views

0 votes

9

Process Scheduling

answered in Operating System Nov 13, 2017

457 views

2 votes

10

Aptitude
A child playing at the balcony of his multi-stored apartment drops a ball from a height of 350 m. Each time the ball rebounds, it rises $\frac{4}{5}$th of the height it has fallen through. The total distance traveled by the ball before it comes to rest is: A. 2920m B. 3150m C. 3250m D. 2750m

answered in Verbal Aptitude Nov 12, 2017

744 views

1 vote

11

UGC NET CSE | November 2017 | Part 3 | Question: 29
The address of a class $B$ host is to be split into subnets with a $6$– bit subnet number. What is the maximum number of subnets and maximum number of hosts in each subnet? $62$ subnets and $1022$ hosts $64$ subnets and $1024$ hosts $62$ subnets and $254$ hosts $64$ subnets and $256$ hosts

answered in Computer Networks Nov 12, 2017

1.3k views

1 vote

12

UGC NET CSE | November 2017 | Part 3 | Question: 28
Match the following : ... $\text{(a)-(iv); (b)-(iii); (c)-(ii); (d)-(i)}$

answered in Computer Networks Nov 12, 2017

725 views

0 votes

13

UGC NET CSE | November 2017 | Part 3 | Question: 24
The language $L =\{a^i \: b \: c^i \mid i \geq 0\}$ over the alphabet $\{a, b, c\}$ is regular language Not a deterministic context free language but a context free language Recursive and is a deterministic context free language Not recursive

answered in Theory of Computation Nov 12, 2017

1.1k views

36 votes

14

GATE CSE 1995 | Question: 2.8
If the cube roots of unity are $1, \omega$ and $\omega^2$, then the roots of the following equation are $(x-1)^3 +8 =0$ $-1, 1 + 2\omega, 1 + 2\omega^2$ $1, 1 - 2\omega, 1 - 2\omega^2$ $-1, 1 - 2\omega, 1 - 2\omega^2$ $-1, 1 + 2\omega, -1 + 2\omega^2$

answered in Calculus Nov 9, 2017

2.7k views

0 votes

15

ISRO 2017-ECE Number system
The Gray code for ($A5$) $16$ is equivalent to $10010101$ $11010101$ $11011111$ $11011011$

answered in Digital Logic Nov 9, 2017

1.7k views

0 votes

16

cubes and dices
The figure shown can be folded into the shape of a cube. In the resulting cube, which of the lettered faces is opposite the face marked x?

answered in Verbal Aptitude Nov 7, 2017

3.4k views

3 votes

17

Aptitude
The sum of all the real roots of the equation $|x-2|^{2}+|x-2|-2=0$ is;

answered in Quantitative Aptitude Nov 6, 2017

415 views

0 votes

18

operating system concepts
Suppose the head of moving head disk with 200 tracks ,numbered 0 to 199 is currently serving a request at track 143 and has just finished a request at track 125.If the queue of requests is kept in the fifo order 86,147,91,177,94,150,100,175,130. what is the total head head movement to satisfy this request for the following disk scheduling algorithms.1)FCFS . 2)SSTF

answered in Operating System Nov 2, 2017

7.6k views

1 vote

19

Row Major
An array A[10][20] starts at decimal address 1000. Each element of array occupies 1 B and array is stored in row major order. Compute address of A[5][6] just give the output.No need very big derivation

answered in DS Oct 29, 2017

919 views

0 votes

20

Process Synchronisation ( binary semaphores)
Consider the below program as two concurrent processes: Semaphore x:= 0; P1: repeat forever P2: repeat forever 1.V(x); 4. P(x); 2.Compute; 5.Compute; 3.P(x); 6.V(x); Consider the following statements about process P1 & P2: (1) ... chance to run , and it wil starve (THIS IS WHAT I THOUGHT THE ANSWER SHOULD BE , PLEASE COMMENT, IF I AM WRONG ANYWHERE)

answered in Operating System Oct 29, 2017

1.0k views

2 votes

21

Ace Test Series: Databases - Conflict Serializable
conflict serialization or not? $R1(A), R2(A),W2(A),commit_2,W1(A) ,commit_1$

answered in Databases Oct 29, 2017

378 views

0 votes

22

MadeEasy WorkBook: Digital Logic - Adder

answered in Digital Logic Oct 27, 2017

619 views

1 vote

23

Aptitude: HCF and LCM
Calculate number of pairs Whose LCM is 800 and HCF is 20?

answered in Quantitative Aptitude Oct 26, 2017

1.9k views

5 votes

24

Process Synchronisation Of Operating System
Consider the below Algorithm where flag and lock are global variables: P0: P1: while (flag= =1 && lock= = 0); while (flag= = 0 && lock= = 1); Enter CS Enter CS lock= 0 flag= 0 flag= 1 lock= 1 (a) The above algorithm is deadlock free (b) The above algorithm guarantees Mutual Exclusion (c) Both (a) & (b) (d) None of the above

answered in Operating System Oct 26, 2017

1.5k views

1 vote

25

made easy test series

answered in Operating System Oct 26, 2017

637 views

0 votes

26

Data Structure
Assume that there are two lower triangular matrices P and Q of size $m\times m$.If matrix P and transpose of Q are fit into rectangular matrix R of size $m\times\left ( m+1 \right )$ then (A) R[i,j+1]=Q[i,j] (B) R[j,i+1]=Q[i,j] (C) R[j+1,i]=Q[i,j] (D)None of above

answered in DS Oct 25, 2017

782 views

2 votes

27

Time, Speed and Distance
Dalbir and Asim are approaching from opposite ends of a linear race track of 100m. After passing each other they reach end points of the track and turn back. They now meet at 35m from where Dalbir started after 45 seconds. Find the speed of Asim? (a) 3 m/s (b) 3.5 m/s (C) 4.5 m/s (d) 5 m/s

answered in Quantitative Aptitude Oct 25, 2017

2.5k views

1 vote

28

Language generated by following grammar
$S -> AB$ $A -> aA / epsilon$ $B ->aBb / epsilon$ What is the class of language generated by the above grammar ?

answered in Theory of Computation Oct 24, 2017

424 views

0 votes

29

Gate 2017 ME
In a company 45 people earn Rs. 20,000 per month, 25 people earn Rs. 30,000 per month, 20 people earn Rs. 40,000, 8 people earns Rs. 60,000 per month and 2 people earn Rs. 150,000 per month. Find median ?

answered in Quantitative Aptitude Oct 24, 2017

1.5k views

1 vote

30

min number of states
(a+b)*aa(a+b) mininum num of states to represent this

answered in Theory of Computation Oct 24, 2017

399 views

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