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1

Probability -Gravner -25
Assume that $20$ Scandinavians, $10$ Finns, and $10$ Danes, are to be distributed at random into $10$ rooms, $2$ per room. What is the probability that exactly $2i$ rooms are mixed, $i= 0, . . .5$?

asked 3 minutes ago in Probability by Pooja Khatri Active (3.7k points) | 1 view

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2

Probability -Gravner -24
You have $10$ pairs of socks in the closet . Picks $8$ socks at random. For every $i$, compute the probability that you get $i$ complete pairs of socks.

asked 9 minutes ago in Probability by Pooja Khatri Active (3.7k points) | 2 views

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3

CSMA/CD
Consider a scenario of CSMA / CD network. Suppose adapter A and B attempt to transmit a frame simultaneously and collide, with exponential back off algorithm. A choose k =0 and B also choose k=0._Again they collide; after this collision both A and B will choose k with equal probability from set A (A) for A ... ,2;3} &for B, {0,1,2,3} (C) for A, {0,1} & for B, {0,1} (D) None of these

asked 9 minutes ago in Computer Networks by BOB (95 points) | 2 views

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4

Routers
A router outside the organization received a packet 224.240.7.91. Consider following steps taken by router. 1. The router looks in its routing table to find out how to route the packet to the destination. 2. The router looks at the first byte of the address to find the class. 3. The default mask ... required step for finding the route? (A) 3 - 1 (B) Only 1 (C) 2 - 3 - 1 (D) 1 - 2 - 3

asked 10 minutes ago in Computer Networks by BOB (95 points) | 2 views

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5

Probability- Gravner - 23
Roll a die $12$ times. Compute the probability that a number occurs $6$ times and two other numbers occur three times each.

asked 11 minutes ago in Probability by Pooja Khatri Active (3.7k points) | 2 views

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6

Doubt
In a Gb Ethernet a particular node has issued a ‘ PAUSE ‘ frame to other end directing to pause for 1000 units of time . what is the total wait time ? (A)128-microsecond (B)64-microsecond (C)512-microsecond (D)32-microsecond

asked 11 minutes ago in Computer Networks by BOB (95 points) | 1 view

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7

Probability -Gravner-22
Assume that there are k people in the room. What is the probability that there are two who share a birthday? we will ignore leap years, assume all birthdays are equally likely, and generalize the problems a little:from n possible birthdays, sample k times with replacement.

asked 13 minutes ago in Probability by Pooja Khatri Active (3.7k points) | 2 views

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8

Doubt
Consider a LAN with 500 stations connected to five 500 m segments. The data rate is 10 Mbps and the slot time is 51.2  sec. If all the stations transmit with equal probability, what is the channel utilization using a frame size of 512 bytes (Number of contention slots are 1.716) (A) 18% (B) 90% (C)None (D) 82%

asked 14 minutes ago in Computer Networks by BOB (95 points) | 1 view

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9

Doubt
In TCP, what is the minimum number of packets required to complete the data transfer between sender and receiver? (A) 9 (B) 8 (C) 7 (D) 6

asked 15 minutes ago in Computer Networks by BOB (95 points) | 3 views

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10

Probability -Gravner-21
A large company with $n$ employees has scheme according to which each employee buys a Christmas gift and the gifts are then distributed at random to the employees.What is the probability that someone gets his or her own gift?

asked 16 minutes ago in Probability by Pooja Khatri Active (3.7k points) | 2 views

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11

Doubt
The round trip delay between X and Y is given as 60 ms and bottle neck bandwidth of link between X and Y is 512 KBps. What is _____ the optimal window size (in packets) if the packet size is 64 bytes and channel is full duplex.

asked 18 minutes ago in Computer Networks by BOB (95 points) | 4 views

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12

Probability - Gravner-20
A group of $3$ Norwegians, $4$ Swedes, and $5$ Finns is seated at random around a table. Compute the probability that at least one of the three groups ends up sitting together.

asked 19 minutes ago in Probability by Pooja Khatri Active (3.7k points) | 2 views

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13

Computer Networks Sub Netwoks
Consider an organization with a class-C IP network address of 195.37.5.0, they wish to divide the network into different sub networks. The subnet mask is 255.255.255.192 Q.1. Which one of the following is not a broadcast address in any of the sub ... IP address belongs to (A) The first sub network (B) The second sub network (C) third sub network (D) Fourth sub network

asked 19 minutes ago in Computer Networks by BOB (95 points) | 1 view

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14

Aptitude Doubt
If (4446)x + (2222)x = (10001)x then value of (2342)x - (1656)x = (?)x how to solve these kinds of questions?

asked 21 minutes ago in Numerical Ability by aditi19 Junior (695 points) | 6 views

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15

Computer Network Subnet
A class-C address has the following subnet mask 255.255.255.192. Which of the following are valid IP addresses under this network? i. 194.25.64.68 ii. 194.43.75.128 iii. 194.65.73.64 iv. 194.75.74.131 (A) i & ii (B) i, ii and iv (C) i, & iv (D) ii & iv

asked 22 minutes ago in Computer Networks by BOB (95 points) | 2 views

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16

Computer Network Firewall
Which of the following parameters can be used by a firewall to decide whether to forward/drop packets? (a) Sources IP address and destination IP address (b) TCP/UDP sources and destination port numbers (c) TCP/SYN and ACK bits (d) All of these

asked 25 minutes ago in Computer Networks by BOB (95 points) | 2 views

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17

Probability - Gravner-15.c
A tennis tournament has $2n$ participants, $n$ Swedes and n Norwegians. First, $n$ people are chosen at random from the $2n$ (with no regard to nationality) and then paired randomly with the other $n$ people. Each pair proceeds to play one match. ... the loser in each of the $n$ matches. (c) Under this assumption, compute the probability that all Swedes are the winners.

asked 26 minutes ago in Probability by Pooja Khatri Active (3.7k points) | 5 views

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18

Probability - Gravner-15.b
A tennis tournament has $2n$ participants, $n$ Swedes and n Norwegians. First, $n$ people are chosen at random from the $2n$ (with no regard to nationality) and then paired randomly with the other $n$ people. Each pair proceeds to play one match. An ... loser in each of the $n$ matches. (b) What do you need to assume to conclude that all outcomes are equally likely?

asked 26 minutes ago in Probability by Pooja Khatri Active (3.7k points) | 2 views

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19

Computer Network Public Key

asked 29 minutes ago in Computer Networks by BOB (95 points) | 1 view

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20

Doubt
"The services required in a public key cryptosystem is Authentication", then which of the following is correct? (a) Sender encrypts the data using receiver's public key (b) Sender encrypts the data using its public key (c) Sender encrypts the data using its private key (d) None of these

asked 31 minutes ago in Computer Networks by BOB (95 points) | 2 views

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21

Made Easy test series
Consider Shubhani wants to transfer a file from host A to host B connected via a link with 100 Mbps bandwidth. Shubhani chooses maximum file size to transfer with MSS of 1460 B. If total 66 bytes of transport, network and data link layer header are added to each segment before the packet is sent over the link, then the time to transmit the file is _____s.

asked 46 minutes ago in Computer Networks by Sambhrant Maurya Junior (669 points) | 4 views

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22

TCP 3-way-handshake

asked 58 minutes ago in Computer Networks by Sambhrant Maurya Junior (669 points) | 3 views

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23

IPv4 (Wrap around time)
Consider an IPv4 network. Each host can generate packets at the rate of 500 packets per second. If each host in the network is identified by unique identification number of 48 bits, then the host wrap around time for generating packets will be ________s

asked 1 hour ago in Computer Networks by Sambhrant Maurya Junior (669 points) | 2 views

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24

lossless and dependency preserving decomposition #testseries

asked 1 hour ago in Databases by night_fury (7 points) | 6 views

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25

Self dual functions
What is self dual function with proper example and explanation.

asked 1 hour ago in Digital Logic by indra thakur (7 points) | 10 views

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26

ER diagram to Tables
Tables needed for ER diagram

asked 1 hour ago in Databases by Mk Utkarsh Boss (16.9k points) | 16 views

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27

Adder

asked 1 hour ago in Digital Logic by HeadShot Active (1.2k points) | 6 views

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28

Ripple carry adder

asked 1 hour ago in Digital Logic by HeadShot Active (1.2k points) | 4 views

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29

GATE previous year
$\text{Someone please explain this question, I am not able to solve it}$ https://gateoverflow.in/87053/gate1989-1-vi

asked 3 hours ago in Digital Logic by !KARAN Junior (537 points) | 14 views

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30

self dout
what is the difference between denumerable , enumerable , countable. please explain I confused with this term when i see some theorem "Power set of an infinite set(denumerable ) set is not denumerable." "Let S be an infinite countable set. Then its power set 2s is not countable."

asked 4 hours ago in Theory of Computation by pream sagar Junior (573 points) | 8 views

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