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Recent activity by Subham Nagar

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Consider the set H of all 3 × 3 matrices of the type: $\begin{bmatrix} a&f&e\\ 0&b&d\\ 0&0&c\\ \end{bmatrix}$ where a, b, c, d, e and f are real numbers and $abc ≠ 0$. Under the matrix multiplication operation, the set H is: (a) a group (b) a monoid but not a group (c) a semigroup but not a monoid (d) neither a group nor a semigroup
commented Jan 5, 2019 in Set Theory & Algebra 132 views
0 answers
If in question it is given to find no. of counting states of a counter, does it mean that we need to find Mod of the counter or just the no. of distinct states that the counter can have?
asked Jan 2, 2019 in Digital Logic 54 views
1 answer
Consider the two given functions: int fun1(int x, int y) { if (y==0) return 0; return (x+fun2(x, y-1)); } int fun2(int x, int y) { if (x==0) return y; return fun2(x-1, x+y); } What will be the value returned by $\text{fun1}(4, 4)$ ____
commented Dec 31, 2018 in Algorithms 157 views
1 answer
Consider the function: int fun(int n) { if (n==4) return n; else return 2*fun(n+1); } A MOD-16 ripple counter is holding the count $(1001)_2.$ What will be the count after "$(\text{fun}(2)+15)_{10}$" clock pulses? $(1000)_2$ $(1010)_2$ $(1011)_2$ $(1101)_2$
answered Dec 31, 2018 in Digital Logic 227 views
1 answer
The speed of a bus during the second hour of the journey is twice that in the first hour. Also, its speed in the third hour is two-third the sum of its speeds in the first two hours. Had the bus travelled for three hours at the speed of the first hour, it would have travelled ... speed of the bus for the first three hours. $100 \text{kmph}$ $80 \text{kmph}$ $70 \text{kmph}$ $60 \text{kmph}$
commented Dec 31, 2018 in Numerical Ability 216 views
1 answer
If $a/b=c/d$, then which of the following does not hold good? $(a+b)/b=(c+d)/d$ $(a+c)/(b+d)=(a-c)/(b-d)$ $(a+b)/(a-b)=(c+d)/(c-d)$ $(a+c)/(b-d)=(a-c)(b+d)$
commented Dec 31, 2018 in Numerical Ability 146 views
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GO BACK 4 We have to send 9 packet,out of which every 5th packet get lost ,using window size 4 what will number of packet transmitted ? Answer 21 or 23
commented Dec 23, 2018 in Computer Networks 33 views
2 answers
Consider a single level cache with an access time of 2.5ns with a block size of 64 bytes. Main Memory uses a block transfer capability that has a first word (4 bytes) access time of 50ns and an access time of 5ns for each word thereafter. If the ... When to consider a Strict memory hierarchy method or Parallel accessing method in Solving these types of questions? By Default which way is followed?
commented Dec 22, 2018 in CO and Architecture 168 views
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Determine whether each of these statements is true or false. 0 ∈ ∅ ∅ ∈ {0} {0} ⊂ ∅ ∅ ⊂ {0} {0} ∈ {0} {0} ⊂ {0} {∅} ⊆ {∅}
commented Dec 22, 2018 in Set Theory & Algebra 55 views
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Find a positive integer n such that given any set N with size|N|=n, then the number of reflexive relations on N is equal to number of symmetric relations on N______? i am getting n=3, please check
commented Dec 21, 2018 in Set Theory & Algebra 96 views
0 answers
Assume 2 computers are connected via a network. The network uses Go-Back 7 sliding window protocol for maintaining flow control. It is observed that every 5th packet that has been sent through the network is lost. What will be the number of extra packets that has to be resent for transmitting 10 such packet through the network? With explanation.
commented Dec 17, 2018 in Computer Networks 520 views
1 answer
The value of z after the execution of the following program is void f(int x) { staticint z; z=z+x; } int main() { int y=10; fork(); fork(); f(y); return 0; } 1.30 2.20 3.40 4. 10
comment edited Dec 16, 2018 in Programming 155 views
1 answer
Consider a B+ -tree in which the maximum no. of keys in a root is 11. What will be minimum no. of keys in a non-root node? What will be the same in a B-Tree Please also refer the source from where clear-cut formulae are given
asked Dec 15, 2018 in Databases 129 views
1 answer
3 answers
How many distinct minimum weight spanning trees does the following undirected, weighted graph have ? $8$ $16$ $32$ $64$ None of the above
commented Dec 9, 2018 in Algorithms 786 views
0 answers
In FCFS CPU Scheduling, when a process with a long Burst Time occupies the CPU, which of the following is said to occur: Convoy Effect Starvation Logically speaking, it should be Starvation as other processes would have to wait for a long time. I just want a confirmation as the answer given is Convoy Effect.
edited Dec 5, 2018 in Operating System 73 views
0 answers
1 answer
Suppose a TCP message of 2000 bytes of data and 20 bytes of TCP header is passed to the IP layer. Suppose this host is connected to a link with an MTU size of 512 Bytes. What is the total length of the last IP fragment? Express in bytes. What is the value of the offset field in the last fragment?
commented Nov 27, 2018 in Computer Networks 210 views
1 answer
Which of the following statements are true ? If A is a non-regular language and B is a infinite language such that B $\subseteq$ A, then B must be non-regular. If A is non-regular language which is not Accepted by any PDA and B is a regular language then ( A $\cup$ B )* may ... ) ii, iii and iv only (c) i, iii and iv only (d) All please discuss the last two statements( i am not getting it ) iii,iv
commented Nov 25, 2018 in Theory of Computation 96 views
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Is the 3 year M.Tech RA (January, sponsored) in IIT HYDERABAD course recently implemented? If anyone can give a review as I have been shortlisted for interview to be held on 26th November but i am not sure to attend or not
asked Nov 20, 2018 in Others 155 views
1 answer
Is SMTP connection-oriented or connectionless ?
asked Nov 13, 2018 in Computer Networks 137 views
1 answer
What will be the minimum no. of states for DFA for the above NFA? Please explain.
asked Sep 23, 2018 in Theory of Computation 78 views
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24 In this question, there is a 4th option named "Syntax Error". So in such questions when do syntax error occurs? Is it related to grammar or something else?
asked Sep 15, 2018 in Compiler Design 89 views
1 answer
A network with CSMA/CD protocol in the MAC layer is running at 1 Gbps over a 1 km cable with no repeaters. The signal speed in the cable is 2 x 108 m/sec. The frame size for this network 10000 bits what is the total time requires to send this frame completely:- 1) when there is no collision in the channel. 2) when there is collision in the channel.
commented Aug 9, 2018 in Computer Networks 309 views
1 answer
commented Aug 3, 2018 in Operating System 29 views
3 answers
Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) Assume all the following four options are executed in the same sequence order. Which statement will not insert a row into the table? a. INSERT INTO ... (employee_id) VALUES (1000); d. INSERT INTO employees (employee_id, first_name, last_name) VALUES ( 1000, John', ');
commented Aug 1, 2018 in Databases 462 views
2 answers
What is the maximum possible height of an AVL tree with 20 nodes?
answered Jul 25, 2018 in DS 236 views
2 answers
(11+1111)* minimized number of states ???
answered Jul 25, 2018 in Theory of Computation 64 views