telecom interview questions and answers for freshers pdf

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12 Telecom interview questions and answers

This page covers telecom/wireless questionnaire set prepared by experienced specialists in telecommunication domain. This domain has always demand right from design,testing and installation. These top 10 telecom interview questions and answers help engineers seeking telecom job to crack the interview.These questions are very useful as viva questions also.

Question-1: Explain basic block diagram of wireless system. Explain the function of scrambler or randomizer. Answer-1: As we know wireless system consists of two main parts viz. transmitter and receiver. scrambler removes long stream of 1s and 0s. This will help distribute energy over larger bandwidth rather than it concentrated around narrow BW. Refer Wireless System Overview➤ and Scrambler and descrambler➤.

Question-2: Explain the function of forward error correction module in a digital communication system. Answer-2: The module FEC helps in correcting the errors at the receiver using the redundant bytes transmitted along with the original information bytes. This module helps in eliminating re-transmission of information bytes. In FEC, transmit end will have convolution encoder and receiver end will have viterbi decoder. Refer Forward Error Correction Basics➤.

Question-3. What is Bit Error Rate and how it is calculated? Answer-3: Bit error rate (BER) is used to measure performance of the wireless or wired system in channel or impairment environment. BER is the ratio of received erroneous bits to the total number of bits transmitted. Refer BER basics➤

Question-4. What is the difference between analog and digital modulation? Explain QPSK modulation scheme. Answer-4: Analog modulation will have baseband information in analog form and digital modulation will have baseband information in digital form. QPSK stands for Quadrature Phase Shift Keying. It is the modulation technique which transmits 2 bits per carrier. It is the most robust digital modulation technique after BPSK modulation. Refer following useful links on analog vs digital modulation types: Analog vs Digital Modulation➤ AM vs FM vs PM➤ ASK vs FSK vs PSK➤ QPSK modulation➤

telecom interview questions and answers for freshers pdf

Question-5. What is delay spread? How it can be tackled in communication chain? Answer-5: Delay spread is the time delay signal incurs while travelling from transmitter to the receiver. Delay spread results into ISI (Inter Symbol Interference). The concept of cyclic prefix is used to tackle ISI and delay spread. Refer Delay spread Vs Doppler spread➤ and What is Cyclic Prefix➤.

Question-6. Explain multipath fading. Answer-6: The variation is received signal strength over time is referred as fading. When the signal traverse from transmit end to receive end, it will have many reflections from buildings and walls till it reaches receive end. This results into multipath fading.

Question-7. What is diversity? Explain types of diversity techniques. Answer-7: The diversity utilizes effect of fading to recover the information from the corrupt received packet. Various types of diversity are space diversity, time diversity, frequency diversity, polarization diversity, directional diversity, pattern diversity, transmit-receive diversity etc. Refer Antenna diversity basics and types➤.

Question-8. Explain RF link budget with equation. Answer-8: Refer RF Link Budget➤

Question-9. What is the difference between coherence bandwidth and coherence time? Answer-9: Frequency range and time period over which channel remains constant is referred as coherence bandwidth and coherence time respectively. Refer Coherence BW vs Coherence Time➤.

Question-10. What is the relation between wavelength and frequency? Answer-10: Wavelength and frequency are inversely proportional to each other. λ = C/Frequency, C = 3 X 10 8 m/sec Refer Wavelength vs frequency➤

Question-11. What is the difference between Erlang and GoS? Answer-11: Both Erlang and GoS are used in telephone exchange for measurement of calls such as calls dropped, calls passed etc. Refer Erlang vs GoS➤

Question-12. What is the difference between CAS and CCS? Answer-12: CAS stands for Channel Associated Signaling and CCS stands for Common Channel Signaling. Both are associated with PCM used in telephony. Refer CAS vs CCS➤ and PCM24 vs PCM30➤

Question-13: Often it is asked to differentiate between single carrier and multiple carrier systems(i.e. OFDM, OFDMA)? Answer-13: SC (single carrier) system carry less information while multi carrier occupy multiple bits simultaneously. Hence data rate is higher for multicarrier compare to single carrier system. Refer SC vs OFDM➤

In addition to the above telecom interview questions and answers, one need to throughly prepare the project carried out during academic curriculum. Also prepare questions on the technologies related to the products of the company where interview need to be given.

List of 35 Wireless Questionnaire, Refer Wireless FAQs-Frequently Asked Questions Set.

Top 10 telecommunications interview questions with answers

  • 1. Top 10 telecommunications interview questions with answers In this file, you can ref interview materials for telecommunications such as, telecommunications situational interview, telecommunications behavioral interview, telecommunications phone interview, telecommunications interview thank you letter, telecommunications interview tips … Other useful materials for telecommunications interview: • • • them •
  • 2. Tell me a suggestion you have made that was implemented in this telecommunications field? Its important here to focus on the word “implemented.” Theres nothing wrong with having a thousand great ideas, but if the only place they live is on your notepad whats the point? Better still, you need a good ending. If your previous company took your advice and ended up going bankrupt, thats not such a great example either. Be prepared with a story about an idea of yours that was taken from idea to implementation, and considered successful.
  • 3. What experience do you have in this telecommunications field? Hopefully if youre applying for this position you have bags of related experience, and if thats the case you should mention it all. But if youre switching careers or trying something a little different, your experience may initially not look like its matching up. Thats when you need a little honest creativity to match the experiences required with the ones you have. People skills are people skills after all, you just need to show how customer service skills can apply to internal management positions, and so on.
  • 4. What is your greatest weakness? This is a challenging question — as if you have no weaknesses you are obviously lying! Be realistic and mention a small work related flaw. Many people will suggest answering this using a positive trait disguised as a flaw such as “Im a perfectionist” or “I expect others to be as committed as I am.” I would advocate a certain degree of honesty and list a true weakness. Emphasize what youve done to overcome it and improve. This question is all about how you perceive and evaluate yourself.
  • 5. What challenges are you looking for in this position? A typical interview question to determine what you are looking for your in next job, and whether you would be a good fit for the position being hired for, is “What challenges are you looking for in a position?” The best way to answer questions about the challenges you are seeking is to discuss how you would like to be able to effectively utilize your skills and experience if you were hired for the job. You can also mention that you are motivated by challenges, have the ability to effectively meet challenges, and have the flexibility and skills necessary to handle a challenging job. You can continue by describing specific examples of challenges you have met and goals you have achieved in the past.
  • 6. Have you ever had a conflict with a boss or professor? How was it resolved? Note that if you say no, most interviewers will keep drilling deeper to find a conflict. The key is how you behaviourally reacted to conflict and what you did to resolve it. For example: “Yes, I have had conflicts in the past. Never major ones, but there have been disagreements that needed to be resolved. Ive found that when conflict occurs, it helps to fully understand the other person’s perspective, so I take time to listen to their point of view, and then I seek to work out a collaborative solution. For example . . .” Focus your answer on the behavioural process for resolving the conflict and working collaboratively.
  • 7. What do you know about us? Follow these three easy research tips before your next job interview: 1) Visit the company website; look in the “about us” section and “careers” sections 2) Visit the company’s LinkedIn page (note, you must have a LinkedIn account — its free to sign up) to view information about the company 3) Google a keyword search phrase like “press releases” followed by the company name; you’ll find the most recent news stories shared by the company Remember, just because you have done your “homework”, it does not mean you need to share ALL of it during the interview! Reciting every fact you’ve learned is almost as much of a turn off as not knowing anything at all! At a minimum, you should include the following in your answer: 1. What type of product or service the company sells 2. How long the company has been in business 3. What the company culture is like OR what the company mission statement is, and how the culture and/or mission relate to your values or personality
  • 8. Why do you want to work with us? More likely than not, the interviewer wishes to see how much you know about the company culture, and whether you can identify with the organization’s values and vision. Every organization has its strong points, and these are the ones that you should highlight in your answer. For example, if the company emphasizes on integrity with customers, then you mention that you would like to be in such a team because you yourself believe in integrity. It doesn’t have to be a lie. In the case that your values are not in line with the ones by the company, ask yourself if you would be happy working there. If you have no issue with that, go ahead. But if you are aware of the company culture and realize that there is some dilemma you might be facing, you ought to think twice. The best policy is to be honest with yourself, and be honest with the interviewer with what is it in the company culture that motivates you.
  • 9. Why should the we hire you? This is the part where you link your skills, experience, education and your personality to the job itself. This is why you need to be utterly familiar with the job description as well as the company culture. Remember though, it’s best to back them up with actual examples of say, how you are a good team player. It is possible that you may not have as much skills, experience or qualifications as the other candidates. What then, will set you apart from the rest? Energy and passion might. People are attracted to someone who is charismatic, who show immense amount of energy when they talk, and who love what it is that they do. As you explain your compatibility with the job and company, be sure to portray yourself as that motivated, confident and energetic person, ever-ready to commit to the cause of the company.
  • 10. What kind of salary do you need? A loaded question. A nasty little game that you will probably lose if you answer first. So, do not answer it. Instead, say something like, That’s a tough question. Can you tell me the range for this position? In most cases, the interviewer, taken off guard, will tell you. If not, say that it can depend on the details of the job. Then give a wide range.
  • 11. Useful materials for telecommunications interview • • • • • • • • • • • • • • •
  • 12. Do you have any questions to ask us? Never ask Salary, perks, leave, place of posting, etc. regarded questions. Try to ask more about the company to show how early you can make a contribution to your organization like “Sir, with your kind permission I would like to know more about induction and developmental programs?” OR Sir, I would like to have my feedback, so that I can analyze and improve my strengths and rectify my shortcomings.
  • 13. Top 6 job tips for telecommunications interview (see details in next page)
  • 14. Tip 1: Do your homework Youll likely be asked difficult questions during the interview. Preparing the list of likely questions in advance will help you easily transition from question to question. Spend time researching the company. Look at its site to understand its mission statement, product offerings, and management team. A few hours spent researching before your interview can impress the hiring manager greatly. Read the companys annual report (often posted on the site), review the employees LinkedIn profiles, and search the company on Google News, to see if theyve been mentioned in the media lately. The more you know about a company, the more youll know how youll fit in to it.
  • 15. Tip 2: First impressions When meeting someone for the first time, we instantaneously make our minds about various aspects of their personality. Prepare and plan that first impression long before you walk in the door. Continue that excellent impression in the days following, and that job could be yours. Therefore: • Never arrive late. • Use positive body language and turn on your charm right from the start. • Switch off your mobile before you step into the room. • Look fabulous; dress sharp and make sure you look your best. • Start the interview with a handshake; give a nice firm press and then some up and down movement. • Determine to establish a rapport with the interviewer right from the start. • Always let the interviewer finish speaking before giving your response. • Express yourself fluently with clarity and precision.
  • 16. Tip 3: The “Hidden” Job Market Many of us don’t recognize that hidden job market is a huge one and accounts for 2/3 of total job demand from enterprises. This means that if you know how to exploit a hidden job market, you can increase your chance of getting the job up to 300%. In this section, the author shares his experience and useful tips to exploit hidden job market. Here are some sources to get penetrating into a hidden job market: Friends; Family; Ex-coworkers; Referral; HR communities; Field communities; Social networks such as Facebook, Twitter…; Last recruitment ads from recruiters; HR emails of potential recruiters…
  • 17. Tip 4: Do-It-Yourself Interviewing Practice There are a number of ways to prepare for an interview at home without the help of a professional career counselor or coach or a fee-based service. You can practice interviews all by yourself or recruit friends and family to assist you.
  • 18. Tip 5: Ask questions Do not leave the interview without ensuring that you know all that you want to know about the position. Once the interview is over, your chance to have important questions answered has ended. Asking questions also can show that you are interested in the job. Be specific with your questions. Ask about the company and the industry. Avoid asking personal questions of the interviewer and avoid asking questions pertaining to politics, religion and the like.
  • 19. Tip 6: Follow up and send a thank-you note Following up after an interview can help you make a lasting impression and set you apart from the crowd. Philip Farina, CPP, a security career expert at Manta Security Management Recruiters, says: “Send both an email as well as a hard-copy thank-you note, expressing excitement, qualifications and further interest in the position. Invite the hiring manager to contact you for additional information. This is also an excellent time to send a strategic follow-up letter of interest.”
  • 20. Other job interview materials: Below are other useful materials from: • Top 12 job interview case study samples • 15 interview followup email examples • 28 job interview guide • 14 job interview tips for candidate with no experience • 29 powerpoint presentation examples • 15 interview role play examples • Free ebook: 80 interview questions and answers pdf download • 25 interview scenarios questions • Top 10 biggest/strengths weaknesses in job interview • How to answer question: tell me about your self? • Top 12 tips for dress code (clothes, attire) • 25 job interview dos and donts • 7 interview assessment forms • 27 interview advices • Top 20 closing questions/ closing statements • 9 interview evaluation forms/interview rating forms • 12 interview group/panel discussion tips • How to do interview introduction? • 18 scenario questions • 23 screening questions • Top 4 common interview rounds and how to prepare
  • 21. Fields and job titles related: Job titles related: telecommunications administrator, telecommunications advisor, telecommunications analyst, telecommunications assistant, telecommunications associate, telecommunications clerk, telecommunications consultant, telecommunications coordinator, telecommunications controller, telecommunications engineer, telecommunications executive, telecommunications manager, telecommunications officer, telecommunications representative, telecommunications specialist, telecommunications supervisor, telecommunications support, vp telecommunications, telecommunications director, telecommunications leader, telecommunications technician, entry level telecommunications, senior telecommunications, junior telecommunications… The above interview questions can be used for fields such as: accounting, administrative, advertising, agency, agile, apartment, application, architecture, asset, assistant, audit, auto, automotive, b2b, bakery, band, bank, banquet, bar, benefits, beverage, billing, brand, budget, building, business, cafe, call center, car, catering, channel, clinic, commercial, communications, community, construction, consulting, content, creative, crm, customer relations, customer service, data, database, delivery, design, digital marketing, distribution, ecommerce, education, electrical, energy, engineering, environmental, equipment, erp, events, exhibition, export, f&b, facilities, factory, fashion, finance, fmcg, food industry, fundraising, furniture, gallery, golf, grants, grocery, gym, healthcare, help desk, hospital, hospitality, hotel, housekeeping, housing, hr, hse, hvac, ict, import, infrastructure, innovation, insurance, interactive, interior design, international, internet, inventory, investment, it, jewelry, kitchen, lab, leasing, legal, logistics, maintenance, manufacturing, market, marketing, materials, media, merchandising, mining, mortgage, music, network, new car, ngo, nhs, non profit, non technical, oem, office, offshore, oil and gas, operations, outbound, outlet, overseas, parts, payroll, pharmaceutical, pharmacy, plant, procurement, product, production, project, property, purchasing, quality assurance, r&d, real estate, records, recruiting, release, research, reservations, restaurant, retail, safety, telecommunications, salon, security, service, shipping, social media, software, sourcing, spa, staffing, store, studio, supply chain,
  • Tell me about your ability to work under pressure?

    Answer tips

    You may say that you thrive under certain types of pressure. Give an example that relates to the type of position applied for.

    Mention routine pressure you face, such as dealing with deadlines on a regular basis.

    Try not to use an example where you created the pressure yourself, by waiting too long to start something, or by handling a task irresponsibly at the beginning. For example, working under pressure to meet a customer’s deadline could be a good example, but not if you had waited too long to start the project.

    Answer samples

    “Pressure is actually a catalyst to my work. When there is an imperative deadline, I refocus my energy into my work which in fact, has helped me to produce some of my best works. (Give examples) I guess you can say I thrive under pressure.”


    What is Telecommunication interview questions and answers?

    11 Common Interview Questions & Answers for Freshers
    • Q1. Tell us about yourself.
    • Q2. What are your strengths?
    • Q3. What are your weaknesses?
    • Q4. What are your hobbies?
    • Q5. What do you know about our company?
    • Q 6. Do you have the tools to work from home?
    • Q7. Why we should hire you?
    • Q8.

    What are the 10 common interview questions and answers?

    Telecommunications Interview Questions & Answers
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    • What is MTU? …
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    • What is SS7? …
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    • What is Impulse Response?

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