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Answers by chauhansunil20th

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A system uses Selective-Repeat protocol with a window size of 4.If each packet carries 5000 bits of data, then the time taken to transfer 5 million bits of data, if the distance between sender and receiver is 2500 Km, the propagation speed is 2*108m/s and data rate is 1Mbps. We assume no ... C. 11.25s D. 16.25s I think answer should be around 7.5 to 7.8.. Can any one explain what the answer is ??
answered Jan 16, 2019 in Computer Networks 435 views
7 votes
For two data sets, each of size $5$, the variances are given to be $4$ and $5$ and the corresponding means are given to be $2$ and $4$ respectively. The variance of the combined data is? $11/2$ $6$ $13/2$ $5/2$
answered Jan 4, 2019 in Probability 312 views
0 votes
Consider the following modified Heapify and Build_heap procedure. void Heapify(int* A, int i, int n) { int left=2*i+1; int right=2*i+2; int mid=i; if (left<=n && right <=n) { if ((A[left] > A[right] && A[left]< A[i]) || A[left]<A[right] && A[left] >A[i]) mid=left; else if((A[left<A[right] && A[right]<A[i]) ... $6 \: 8 \: 1 \: 9 \: 4$ $9 \: 6 \: 1 \: 8 \: 4$ $6 \: 9 \: 1 \: 8 \: 4$
answered Jan 4, 2019 in Algorithms 333 views
0 votes
Consider a parent process $P$ that has forked a child process $C$. $C$ has again forked another child process $D$. Now $P$ terminates while $C$ and $D$ are still running. In this case, which of the following statements is true? $P$ immediately becomes a ... $P$ $P$ immediately becomes an orphan process, until adopted by its parent
answered Jan 4, 2019 in Operating System 517 views
1 vote
A single query in DBMS can be executed through different algorithms or re-written in different forms and structures. The most optimal pathway of getting the correct output among all these algorithms can be obtained by the process of query optimization. Consider the ... from Employee where columnB >3000 and columnC<3000; select columnA from Employee; The given query is already in optimized form.
answered Jan 4, 2019 in Databases 179 views
3 votes
Consider the following two relational schemas: MovieExec(name, address, cert, netWorth) Studio(name, address, presC) Suppose we wish to require that one must have a net worth of at least $1000000$ Rupees to be president of a movie studio. The join operation if required can be performed on the ... P, Q and S P, Q and R Q and R P and S
answered Jan 4, 2019 in Databases 257 views
2 votes
Consider the following language $L$: $L=\{<M,x,k> \mid M \text{ is a Turing Machine and M does not halt on x within k steps} \}$ The language family to which $L$ belongs is not closed under? Intersection Homomorphism Set Difference Complementation
answered Jan 4, 2019 in Theory of Computation 272 views
5 votes
Which of the following statements on Viable Prefixes is incorrect? A viable prefix does not extend past the right end of the handle For any context-free grammar, the set of viable prefixes is a regular language A viable prefix by default is a suffix of the handle As long as a parser has viable prefixes on the stack no parsing error has been detected
answered Jan 4, 2019 in Compiler Design 266 views
10 votes
Let $f(A, B, C, D)=\Pi (2, 3, 5, 9, 11, 12, 13)$ The total number of prime implicants and essential prime implicants are denoted by $P$ and $Q$ respectively. What is the value $Q \% P$ where $'\%'$ denotes the modulo operator?
answered Jan 4, 2019 in Digital Logic 507 views
2 votes
A program runs in $20s$ in machine A with a clock speed of $200MHz$. A computer architecture wants to build a machine B which will run this program in $6$ seconds. The architect has delivered that a substantial increase in clock rate is possible, but this will affect ... times as many as clock cycles as machine A for this program. What clock rate should be targeted for a best design? (In $MHz$)
answered Jan 4, 2019 in CO and Architecture 211 views
5 votes
A $5$ stage pipeliine is used to overlap all the instructions except the branch instructions. The target of the branch can't be fetched till the current instruction is completed. What is the Throughput (in MIPS) of the system if $20\%$ of the instrucitons are branch instructions? Ignore ... of delay. The pipeline clock rate is $0.1 \: GHz$. Branch penalty is $4$ cycles. (Upto $2$ decimal place).
answered Jan 4, 2019 in CO and Architecture 364 views
4 votes
Which of the following sorting algorithms performs efficiently to sort a singly linked list containing $\log n$ nodes and the corresponding time complexity is? $\text{Insertion sort, } O(\log ^2 n)$ $\text{Merge sort, } \Theta (( \log n) \log (\log n ))$ $\text{Heap sort, } \Theta ( \log ^2)(\log n ))$ $\text{Quick sort, } O ( \log 2)(\log n ))$
answered Jan 4, 2019 in Algorithms 289 views
1 vote
A system is having user processes $P_1, P_2, \dots , P_N$ each requiring $Q_N, Q_{N-1}, \dots , Q_1$ number of resource instances of resource $R$. The minimum number of resource instances of $R$ to guarantee that deadlock will not occur is $NQ_N - N+1$ $NQ_1 + N-1$ $(Q_1 + Q_2 + … + Q_N) + N – 1$ $(Q_1 + Q_2 + … + Q_N) + 1 – N$
answered Jan 4, 2019 in Operating System 144 views
8 votes
3 votes
Which of the following is TRUE with respect to Diffie-Hellman Key exchange algorithm? It can be used for encryption or decryption purpose It doesn't suffer from man in the middle attack It suffers from bucket brigade attack It is an example of private key cryptography algorithm
answered Jan 3, 2019 in Computer Networks 469 views
5 votes
Let $S(x,y,z)$ and $C(x,y,z)$ represents the Sum & Carry function of a full adder circuit. Which of the following options best represents $S(x,y,z)$ and $C(x,y,z)$ respectively? $x \oplus y \oplus z, y( x \oplus z)+xy$ $x \oplus y \oplus z, y(x+y+z)$ $x \odot y \odot z, z(x+y)+xy$ $\text{None of these}$
answered Jan 3, 2019 in Digital Logic 309 views
6 votes
A book contains $100$ pages. A page is chosen at random. What is the chance that the sum of the digits on the page is equal to $8$? $0.08$ $0.09$ $0.90$ $0.10$
answered Jan 3, 2019 in Numerical Ability 255 views