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Answers by Abhisek Tiwari 4

1 vote
1
The ability to inject packets into the Internet with a false source address is known as Man-in-the-middle attack IP phishing IP sniffing IP spoofing
answered Jul 3, 2019 in Computer Networks 407 views
2 votes
2
What percentage $(\%)$ of the IPv4, IP address space do all class C addresses consume? $12.5 \%$ $25 \%$ $37.5 \%$ $50 \%$
answered Jul 3, 2019 in Computer Networks 747 views
2 votes
3
What is the name of the protocol that allows a client to send a broadcast message with its MAC address and receive an IP address in reply? ARP DNS RARP ICMP
answered Jul 3, 2019 in Computer Networks 736 views
2 votes
4
Which of the following is application of depth-first search? Only topological sort Only strongly connected components Both topological sort and strongly connected components Neither topological sort nor strongly connected components
answered Jul 3, 2019 in Algorithms 263 views
2 votes
5
A processor can support a maximum memory of $4$ GB where memory is word addressable and a word is $2$ bytes. What will be the size of the address bus of the processor? At least $28$ bits At least $2$ bytes At least $31$ bits Minimum $4$ bytes
answered Jul 3, 2019 in CO and Architecture 249 views
2 votes
6
A computer has six tape drives with $n$ processes competing for them. Each process may need two drives. What is the maximum value of $n$ for the system to be deadlock free? $5$ $4$ $3$ $6$
answered Jul 3, 2019 in Operating System 323 views
1 vote
7
At a particular time of computation, the value of a counting semaphore is $7$. Then $20 \ P$ (wait) operations and $15 \ V$ (signal) operations are completed on this semaphore. What is the resulting value of the semaphore? $28$ $12$ $2$ $42$
answered Jul 3, 2019 in Operating System 256 views
0 votes
8
Consider a disk system with $100$ cylinders. The requests to access the cylinders occur in the following sequences: $4, 34, 10, 7, 19, 73, 2, 15, 6, 20$ Assuming that the head is currently at cylinder $50$, what is the time taken to satisfy all requests if it takes $1$ ms to move from the cylinder to adjacent one and the shortest seek time first policy is used? $357$ ms $238$ ms $276$ ms $119$ ms
answered Jul 3, 2019 in Operating System 352 views
0 votes
9
Consider that a process has been allocated $3$ frames and has a sequence of page referencing as $1, 2, 1, 3, 7, 4, 5, 6, 3, 1$. What shall be the difference in page faults for the above string using the algorithms of LRU and optimal page replacement for referencing the string? $2$ $0$ $1$ $3$
answered Jul 3, 2019 in Operating System 514 views
3 votes
10
Which of the following statements are DML statements? Update [tablename] Set [columnname]=VALUE Delete [tablename] Select * from [tablename] a and b a and d a, b and c b and c
answered Jul 3, 2019 in Databases 403 views
1 vote
11
In relational databases, if relation R is in BCNF, then which of the following is true about relation R? R is in 4NF R is not in 1NF R is in 2NF and not in 3NF R is in 2NF and 3NF
answered Jul 3, 2019 in Databases 746 views
3 votes
12
Consider the set of integers $\{1,2,3,\ldots,5000\}.$ The number of integers that is divisible by neither $3$ nor $4$ is $:$ $1668$ $2084$ $2500$ $2916$
answered May 14, 2019 in Numerical Ability 273 views
1 vote
13
0 votes
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0 votes
15
answered May 3, 2019 in Databases 52 views
0 votes
16
answered May 3, 2019 in DS 52 views
0 votes
17
0 votes
18
answered May 3, 2019 in Algorithms 45 views
1 vote
19
0 votes
20
answered May 3, 2019 in Algorithms 46 views
0 votes
21
answered May 3, 2019 in Algorithms 51 views
0 votes
22
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23
0 votes
24
answered May 3, 2019 in Databases 36 views
0 votes
25
answered May 3, 2019 in Programming 81 views
4 votes
26
Let L1 and L2 be 2 languages which are not regular. Which of these is true? The union of L1 and L2 is not regular. The intersection of L1 and L2 is not regular. Both I and II are true I is true, II is false I is false, II is true Both I and II are false
answered May 2, 2019 in Theory of Computation 172 views
4 votes
27
Simplify the following expression AB’C + A’BC + A’B’C Solution given is A’C + B’C can someone show me how?
answered May 2, 2019 in Digital Logic 306 views
0 votes
28
Match the following List 1 Link time load time compile time Run time List 2 A. Resolving references B. Relocation C. Token Recognition D. Activation record
answered Mar 10, 2019 in Compiler Design 118 views
9 votes
29
If $C$ is a skew-symmetric matrix of order $n$ and $X$ is $n\times 1$ column matrix, then $X{^T} CX$ is a scalar matrix null matrix unit matrix matrix will all elements $1$
answered Feb 12, 2019 in Linear Algebra 1.8k views
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