Preguntas de entrevista para Ingeniero Network
7 mil
Preguntas de entrevista para el puesto de Ingeniero Network compartidas por los candidatosPrincipales preguntas de entrevista
How long do you plan to work here?
34 respuestas
All questions are mentions in the review and practice following coding questions for sure on leetcode.
14 respuestas↳
3. convert the sentence to the modified pig-latin/goat-latin language. Complexity Time: O(n) + O(5) + O(k(k+1)/2) Considering total n characters in sentence. m characters/word O(n): Reading compelete sentence O(2): For vowel. Append ma O(3): For consonant. Append ma and 1st character 1+2+3+... k words = k(k+1)/2 Space: O(n) + 2O(m) + O(5) O(5): unordered_set of vowels 2O(m): Storing 2 word O(n): Storing complete sentence Code #include #include #include void AppendA(std::string& strWord, int& count){ int i = 0; strWord += "ma"; while(i++ us = {'a','e','i','o','u'}; //1st Letter is Vowel if (us.find(std::tolower(strParsed.at(0))) != us.end()) { strWord = strParsed; AppendA(strWord, ++count); } else //consonant { strWord = strParsed.substr(1,strParsed.size()); strWord += strParsed[0]; AppendA(strWord, ++count); } } int main(){ std::string strInput = "Adam wants to go to the university"; std::string strOutput, strWord, strParsed; int count = 0; for (auto& i:strInput){ if (i == ' '){ Process(strParsed, strWord, count); strOutput += strWord + ' '; strWord = ""; strParsed = ""; } else //Store word in strParsed { strParsed += i; } } Process(strParsed, strWord, count); strOutput += strWord ; std::cout<<"Converted string="< Menos
↳
1. You receive a vector/ array and 2 numbers, eg 2 and 5. Between those 2 positions in the vector (2 and 5) you have to reverse the order of the elements. Code #include #include #include using vec = std::vector; using itr = std::vector::iterator; int main(){ vec v = {1,2,9,8,4,5,23,5,252,445,677,5}; //Find position of 2 itr it1 = std::find(v.begin(), v.end(), 2); //O(n) //Find position of 5 itr it2 = std::find(v.begin(), v.end(), 5); //O(n) std::reverse(it1+1, it2); //O(n) for (auto i:v) std::cout< Menos
↳
2. Count words and output top n Complexity n: number of words Space map=O(n), priority_queue = O(k). Since we only create queue of size=k, output vector = O(k) Time Creation of map=O(n), Creation of priority Queue=O(n), Creation of output vector=O(k) Code #include #include #include #include using VS = std::vector; using mypair = std::pair; class Solution { public: VS topKFrequent(VS& vsWords, int k) { VS vsOut; std::priority_queue pq; std::unordered_map um; // for(const auto i : vsWords) //1 um[i]++; //um[key]=value; //um[i] = um[i]+1 for(const auto i:um){ //2 pq.push(make_pair(-i.second,i.first)); if (pq.size() > k) pq.pop(); } while(not pq.empty()){ //3 vsOut.push_back(pq.top().second); pq.pop(); } for(int i = 0; i < vsOut.size()/2; i++) //4 std::swap(vsOut[i], vsOut[vsOut.size()-i - 1]); return vsOut; } }; Menos
a detailed troubleshooting scenario for VPN was asked. a site-to-site VPN, user from one site cannot get to a resource on another site.
8 respuestas↳
There was no one answer for this, and since I didn't know much about vpns, the interviewer guided me through the possible answers! Menos
↳
Hello, Can anyone tell me the best link to study troubleshooting scenarios from?
↳
#sh vlan brief
How does STP work...how does it know who will control everything?
5 respuestas↳
It disables redundant paths and only leaves one broadcast path in a mesh network. It then enables a previous blocked path if one of the primary links becomes disconnected. This creates a network that won't cause broadcast storms but still provide redundancy. Menos
↳
STP operates at the Data Link layer of the OSI model which prevents traffic loops. STP chooses only one root switch/bridge, out of which all data paths span out logically getting the data to the target the quickest and detect and correct link failures when a switch/bridge fails...STP stands for Spanning Tree Protocol. The root is chosen based on its BID( Bridge ID) which is the combination of a 2 byte priority field and the bridge/switch MAC address....Since all switch/bridges on the network start out with the same priority, the one with the lowest MAC address becomes the root bridge. Menos
↳
STP is basically used for loop prevention and to prodive redundancy. Devices participating in STP perform a root bridge election process. Device having the lowest priority will be choosen as the root bridge. If every device participating in STP have the same priority value, device with the lowest mac-address becomes the root bridge. The root bridge will be responsible to make th overall traffic flow decision on the LAN. Non-root bridges use a lowest cost path to reach the root bridge. This cost is dependent on the interface speed. Topological changes downstream from the root bridge is communicated to the root bridge. Menos
bgp, mpls,vpn
4 respuestas↳
what do you think ? If i was there 4 hours.
↳
I mean what were the topics they focused and can you please elaborate.
↳
Tons of questions about ibgp behavior , ebgp ,mpls ldp , te , mpbgp , sec vpn and other protocols. Menos
Coding questions are from Med-Hard LC Networking - BGP/OSPF/Redundancy, STP, IPv6
4 respuestas↳
The key in these questions is to cover the fundamentals, and be ready for the back-and-forth with the interviewer. Might be worth doing a mock interview with one of the Facebook or ex-Facebook Network Engineer experts on Prepfully? They give real-world practice and guidance, which is pretty helpful. prepfully.com/practice-interviews Menos
↳
Can you share some details around system design ? Was it realted to bringing up a new data center or discussion about your previous projects ? Menos
↳
Practice 50-100 LC Easy to Med questions. Should put you on the track to success. Networking - Read CCNP guides for OSPF and BGP. Expect questions in depth and very specific. Menos
· BGP/TCP/IP protocols/route reflectors · Network hardware and software – switches, chips, etc. · Network infrastructure · Troubleshooting · Linux / automation, Scripting(Regex will be helpful)
4 respuestas↳
I did well.
↳
Basic String manipulatiob
↳
Could you please tell me what kind of questions faced in a coding interview ? Please let me know as earliest as possible. Menos
How would you know if a port is open or not.
4 respuestas↳
On the server itself, use "netstat -an" to check to see which ports are listening From outside, just "telnet host port" to see if the connection is refused, accepted, or timeouts Menos
↳
Try to ping the port. The answer they were looking for was probably a port sniffer. Or network monitoring tool like wireshark. Menos
↳
In these sorts of interviews you really need to drill down and understand what the interviewer is looking for. A good way to simulate a real interview experience is to do a mock with one of the Citrix Network Engineer experts on Prepfully, rated super strongly on TrustPilot... prepfully.com/practice-interviews Menos
Explain the difference between TCP and UDP
4 respuestas↳
That's really as difficult as it gets?
↳
UDP packet processing is faster compared to TCP packet processing. This is because once TCP packets are delivered to the destination, an acknowledgement is expected at the transmission end. If no acknowledgement is received, re-transmission of packets occurs at the transmission end. This is opposite to UDP operation, in which no acknowledgement is necessary. Menos
↳
TCP is a reliable protocol that utilizes windowing and acknowledgement packets to ensure all traffic is transmitted and received UDP is an unreliable protocol that does not utilize windowing and acknowledgements, and is good to use when you can't re-transmit a packet (EG a voice or video packet) Menos