Upload Button Icon Add office photos

Deutsche Telekom

Compare button icon Compare button icon Compare

Filter interviews by

Deutsche Telekom Software Engineer Interview Questions, Process, and Tips

Updated 1 Jan 2025

Top Deutsche Telekom Software Engineer Interview Questions and Answers

  • Q1. Share your screen, write a API to get the logs of a spring boot application in kibana way, reading from the back.
  • Q2. Find the largest number in an Array without DS and loop in Java 8?
  • Q3. Find all the permutation of the Array?

Deutsche Telekom Software Engineer Interview Experiences

4 interviews found

Software Engineer Interview Questions & Answers

user image akhil mahendru

posted on 1 Jan 2025

Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. Java8 stream api code
  • Q2. Right view of tree Spring boot situation based question
Interview experience
3
Average
Difficulty level
Moderate
Process Duration
-
Result
Not Selected

I applied via LinkedIn and was interviewed in Apr 2024. There was 1 interview round.

Round 1 - Technical 

(2 Questions)

  • Q1. Find all the permutation of the Array?
  • Ans. 

    Permutations of an array of strings are all possible arrangements of the elements.

    • Use recursion to generate all permutations.

    • Swap elements to create different permutations.

    • Base case: when only one element is left, add the permutation to the result.

    • Example: Array ['A', 'B', 'C'] has permutations ['ABC', 'ACB', 'BAC', 'BCA', 'CBA', 'CAB'].

  • Answered by AI
  • Q2. Find the largest number in an Array without DS and loop in Java 8?
  • Ans. 

    Use Java 8 Stream API to find the largest number in an array of strings without using additional data structures or loops.

    • Convert the array of strings to a stream of integers using map() and parseInt()

    • Use reduce() with Math::max to find the largest number in the stream

  • Answered by AI

Skills evaluated in this interview

Software Engineer Interview Questions Asked at Other Companies

asked in Qualcomm
Q1. Bridge and torch problem : Four people come to a river in the nig ... read more
asked in Capgemini
Q2. In a dark room,there is a box of 18 white and 5 black gloves. You ... read more
Q3. Tell me something about yourself. Define encapsulation. What is i ... read more
asked in Paytm
Q4. Puzzle : 100 people are standing in a circle .each one is allowed ... read more
asked in TCS
Q5. Find the Duplicate Number Problem Statement Given an integer arra ... read more

I applied via Referral and was interviewed in Apr 2022. There were 3 interview rounds.

Round 1 - Technical 

(1 Question)

  • Q1. Implement stack using linkedlist, discussion on singleton design pattern, java output question
Round 2 - Technical 

(1 Question)

  • Q1. Hashmap Implementation, discussion on arraylist,hashmap, concurrent hashmap, one coding question on string , some other basisc java topic discussed
Round 3 - Technical 

(1 Question)

  • Q1. Sample spring boot code from scratch, discussed all used annotations, exceptional handling, spring security, discussion on complexity of some data structure

Interview Preparation Tips

Topics to prepare for Deutsche Telekom Software Engineer interview:
  • Java
  • Spring Boot
  • Data Structures
Interview preparation tips for other job seekers - More focus on basics as my experienced they are checking your basic understanding rather than general definition and practise some real time senarios questions.

I applied via Recruitment Consultant and was interviewed in Mar 2021. There were 3 interview rounds.

Interview Questionnaire 

3 Questions

  • Q1. Share your screen, write a API to get the logs of a spring boot application in kibana way, reading from the back.
  • Ans. 

    API to get logs of a Spring Boot app in Kibana way, reading from the back.

    • Use Spring Boot Actuator to expose endpoints for log retrieval

    • Configure Logstash to read logs from the application and send to Elasticsearch

    • Use Kibana to visualize and search logs

    • Implement pagination to read logs from the back

  • Answered by AI
  • Q2. Design ZoomCar
  • Ans. 

    Design a car rental platform like ZoomCar.

    • Create a user-friendly website and mobile app for booking cars.

    • Integrate GPS and other technologies for easy tracking and navigation.

    • Offer a wide range of cars for rent, from hatchbacks to luxury cars.

    • Provide flexible rental options, including hourly, daily, and weekly rentals.

    • Implement a secure payment gateway for hassle-free transactions.

    • Ensure proper maintenance and cleaning...

  • Answered by AI
  • Q3. Microservice architecture, REST, Feign Client, RabbitMQ

Interview Preparation Tips

Interview preparation tips for other job seekers - DS(upto stack/queue is must), Ability to design systems, think for an architecture, Microservice architecture is favourite topic of interviewers nowadays, DB knowledge especially NOSQL

Skills evaluated in this interview

Deutsche Telekom interview questions for designations

 Software Development Engineer II

 (1)

 Senior Test Engineer

 (1)

 Application Support Engineer

 (1)

 IOS Developer

 (1)

 Sdet

 (1)

 Senior IOS Developer

 (1)

 Senior Java Developer

 (1)

 Android Developer

 (1)

Interview questions from similar companies

I appeared for an interview before May 2016.

Interview Preparation Tips

College Name: GPREC kurnool

I appeared for an interview in Mar 2017.

Interview Questionnaire 

5 Questions

  • Q1. Related to semiconductors, processors etc. were asked.
  • Q2. Strength
  • Q3. Weaknesses
  • Q4. Hobbies
  • Q5. If there are 200 fishes in an aquarium. 99% are red. How many fishes have to be removed to make the red fishes 98 % in the aquarium?
  • Ans. 

    To make the red fishes 98%, 50 fishes have to be removed from the aquarium.

    • Calculate 1% of 200 fishes to find the number of red fishes.

    • Subtract the number of red fishes from 200 to find the number of non-red fishes.

    • Calculate 2% of the total number of fishes to find the desired number of red fishes.

    • Subtract the desired number of red fishes from the current number of red fishes to find the number of fishes to be removed.

  • Answered by AI

Interview Preparation Tips

Round: Test
Experience: There were 40 aptitude questions of variable difficulty. More questions revolved around topics like time and work, distance, speed, time, profit loss, age etc.
Tips: A regular and prior preparation will go a long way in determining a good test score.
Use tricks to solve the questions and calculations should be fast.
Duration: 30 minutes
Total Questions: 40

Round: Test
Experience: The questions weren't that tough when it came to programming. An example would be conversion of temperature from Celsius to Fahrenheit and vice versa. This was a question in my paper. So I'm hoping the difficulty would be more or less the same.
Tips: Do certified programming courses. They help you a lot in cracking good jobs.
Duration: 45 minutes
Total Questions: 3

Round: Puzzle Interview
Tips: This can be tough if you can't imagine scenarios and situations. So make sure you inculcate critical problem solving thinking in your everyday life. I feel that's the best way to do things in this round.

Round: Technical Interview
Experience: This was a short interview so not much happened.
Tips: Whatever you do just know your stuff properly.

Round: HR Interview
Experience: It was a simple interview. Basic questions and their basic answers helped me get through it.
Tips: The tip would be to stay positive in your approach while answering the questions

Skills: Technical Skill, Interpersonal Communication, Aptitude
College Name: VIT Vellore

I appeared for an interview in Mar 2017.

Interview Questionnaire 

5 Questions

  • Q1. Related to semiconductors, processors etc. were asked.
  • Q2. Weaknesses
  • Q3. Strength
  • Q4. Hobby
  • Q5. If there are 200 fishes in an aquarium. 99% are red. How many fishes have to be removed to make the red fishes 98 % in the aquarium?
  • Ans. 

    To make the red fishes 98%, 50 fishes have to be removed from the aquarium.

    • Calculate 1% of 200 fishes to find out how many fishes represent 1%.

    • Multiply the result by 2 to find out how many fishes represent 2%.

    • Subtract the result from 200 to find out how many fishes represent 98%.

  • Answered by AI

Interview Preparation Tips

Round: Test
Experience: There were 40 aptitude questions of variable difficulty. More questions revolved around topics like time and work, distance, speed, time, profit loss, age etc.
Tips: A regular and prior preparation will go a long way in determining a good test score.
Use tricks to solve the questions and calculations should be fast.
Duration: 30 minutes
Total Questions: 40

Round: Test
Experience: The questions weren't that tough when it came to programming. An example would be conversion of temperature from Celsius to Fahrenheit and vice versa. This was a question in my paper. So I'm hoping the difficulty would be more or less the same.
Tips: Do certified programming courses. They help you a lot in cracking good jobs.
Duration: 45 minutes
Total Questions: 3

Round: Puzzle Interview
Tips: This can be tough if you can't imagine scenarios and situations. So make sure you inculcate critical problem solving thinking in your everyday life. I feel that's the best way to do things in this round.

Round: Technical Interview
Experience: This was a short interview so not much happened.
Tips: Whatever you do just know your stuff properly.

Round: HR Interview
Experience: It was a simple interview. Basic questions and their basic answers helped me get through it.
Tips: The tip would be to stay positive in your approach while answering the questions

Skills: Technical Skill, Interpersonal Communication, Aptitude
College Name: VIT Vellore

I appeared for an interview in Mar 2017.

Interview Questionnaire 

8 Questions

  • Q1. Basics of networking
  • Q2. Data structures
  • Q3. Sql
  • Q4. Introduction
  • Q5. Final year project
  • Q6. Why should I hire you?
  • Ans. 

    I have the technical skills, experience, and passion to deliver high-quality software solutions.

    • I have a strong background in programming languages such as Java, Python, and C++.

    • I have experience working on complex software projects and collaborating with cross-functional teams.

    • I am passionate about staying up-to-date with the latest technologies and trends in software development.

    • I am a quick learner and have a strong...

  • Answered by AI
  • Q7. Why Ericsson?
  • Ans. 

    Ericsson is a global leader in telecommunications technology with a strong focus on innovation and career development.

    • Global leader in telecommunications technology

    • Strong focus on innovation

    • Opportunities for career development

  • Answered by AI
  • Q8. About relocation

Interview Preparation Tips

Round: Test
Experience: The test which I wrote was based on cocubes. quants was easy, one can easily score 50 percent if they refer rs agarwal and logical was easy but it takes more time and verbal was neither easy nor tough. One thing I want to advice try doing verbal first so that u can save time and then go to quant and logical. After the test we got the results out of 160 students 51 cleared the test. I was one among them.
Duration: 45 minutes
Total Questions: 45

Round: Technical Interview
Experience: Keep ur cool in the technical. people are friendly. Think before you answer twice they may ask u puzzles as well. So be prepared for it. Final year project is a must, they are gonna ask u the details how you implement stuffs in your project. After my technical out of 51 students around 30 cleared this round. I was one among them.

Round: HR Interview
Experience: Don't be scared guys. Hr is just a casual one. finally around 15 were selected from my college including me. I am very happy with the result. best of luck guys. Do well!!!
Tips: Keep your cool. stay confident that's all I can tell. Once you clear technical one can easily clear Hr round.

Skills: Communication, Technical Skill
College Name: JSS Academy of Technical Education - JSSATE

Interview Questionnaire 

4 Questions

  • Q1. Write a C code for printing Febonacci Series upto n elements
  • Ans. 

    C code for printing Fibonacci Series upto n elements

    • Declare three variables to store the current, previous and next numbers in the series

    • Initialize the previous and current variables to 0 and 1 respectively

    • Use a loop to print the next number in the series by adding the previous two numbers

    • Loop should run n times to print n elements in the series

  • Answered by AI
  • Q2. Question related to family background
  • Q3. What are your hobbies?
  • Q4. What are your strengths and weaknesses?

Interview Preparation Tips

Round: Test
Experience: Questions were from easy to moderate level. No negative marking, so attempt all.
Tips: Keep your mind open and practice aptitude problems on a daily basis.

Round: Group Discussion
Experience: There were 21 students selected out of which two teams of 10 and 11 students were formed. Both the groups were given a topic and each one of us had to express our views.
Tips: Don't get nervous, just speak whatever you think. Don't yell or speak at loudly, just keep calm and put your points forward.
Duration: 20 minutes

Round: Technical Interview
Experience: Apart from the above questions some puzzles and DBMS questions and a few basic C questions were also asked. We were given enough time to think and answer.
Tips: Do not be in a hurry. Think properly what you are going to say, whether it is right or not and then only answer.

Round: HR Interview
Experience: The HR round was a good one. He tried to test my thinking capabilities and reasoning capabilities
Tips: Answer every question honestly.

General Tips: All the four rounds were elimination rounds and the final result was announced based on cumulative performance. So, be patient and give your best.
Skill Tips: Try to answer every properly
Skills: IQ, Basic Coding Skills, Problem Solving Skills
College Name: NIT ALLAHABAD
Motivation: The company visited our college campus. Also, one of my relatives in in Ericsson at a very high  post and is quite happy working here.

Skills evaluated in this interview

Interview Questionnaire 

6 Questions

  • Q1. Suppose you are recruited as an ECE engineer in IRCTC. Your job is to stop the train accidents that happen every now and then. Use your Applied Electronics to construct a scheme/plan. Tell me how will you ...
  • Ans. 

    Using Applied Electronics to prevent train accidents in IRCTC

    • Implement sensors to detect obstacles on tracks

    • Use GPS and communication systems to alert train drivers of potential dangers

    • Install automatic braking systems in case of emergency

    • Regular maintenance and inspection of tracks and trains

    • Train and educate staff on safety protocols and emergency procedures

  • Answered by AI
  • Q2. Explain the working of IC 555 timer
  • Ans. 

    IC 555 timer is a versatile timer IC used in various applications like oscillators, timers, and flip-flops.

    • IC 555 timer has three modes of operation: monostable, astable, and bistable.

    • In monostable mode, the output is high for a fixed duration when triggered.

    • In astable mode, the output oscillates between high and low states.

    • In bistable mode, the output remains in either high or low state until triggered.

    • IC 555 timer ca...

  • Answered by AI
  • Q3. How internet works, Network model etc
  • Ans. 

    The internet is a global network of interconnected devices that communicate using standardized protocols.

    • The internet is based on the TCP/IP protocol suite.

    • Data is transmitted in packets across the network.

    • The network model consists of layers, including the physical, data link, network, transport, and application layers.

    • Routing protocols are used to direct packets to their destination.

    • Examples of internet applications ...

  • Answered by AI
  • Q4. General question from my CV
  • Q5. Tell me about yourself
  • Ans. 

    I am a software engineer with experience in developing web and mobile applications using various programming languages and frameworks.

    • Proficient in Java, Python, and JavaScript

    • Experience with React, Angular, and Node.js

    • Strong understanding of database management systems

    • Passionate about learning new technologies and solving complex problems

  • Answered by AI
  • Q6. Family, Schooling, Interests

Interview Preparation Tips

Round: Test
Experience: It was 2.5 hour long AMCAT test comprising of Quant, Verbal ability, analytic ability, technical section comprising questions from C, DSA and other computer fundamentals.
The test is not that difficult so the cutoff generally goes high
Duration: 150 minutes

Round: Technical Interview
Experience: Started with a formal "Tell me about yourself". While I continued for 2 minutes, he read my CV word to word. Since I had always been interested in programming and so it was my strong point. But he didn't even ask my area of interest and directly asked me question from core electronics that too application based. The questions were like this:
1. "Suppose you are recruited as an ECE engineer in IRCTC. Your job is to stop the train accidents that happen every now and then. Use your Applied Electronics to construct a scheme/plan. Tell me how will you proceed?"
I was literally stunned at such a question. However I took some seconds to think and gave him 2-3 answers all applying the idea in one way or the other. Like use of modern sensors, RADAR technology, Use of automated baricates at crossings and explained it to him. He wasn't fully convinced but somehow I was able to do OK.
After that i told him that I was more comfortable in programming and computer science subjects. he neglected this altogether and kept asking me ECE questions. Next questions were like "Explain the working of IC 555 timer." I told him straight away that I didn't know it very well.
After this he moved on to ask me the difference between GSM and CDMA technology, how mobile phones work and the whole concept of cellular telephony. I had prepared well for it and told him even more than he was expecting so he was quite pleased to hear it.
Next were some questions from computer networks like how internet works, Network model etc. I told him I was studying CN currently so i gave him the basics of OSI model explaining briefly each of the 7 layers. Also told him about sub-nets, sub-net masks etc.
After this he asked me some general question from my CV about my achievements like KVPY scholarship, NTSE scholarship and about my research paper. I explained it to him to the best I could. Then I asked a couple questions from my side and this interview was over. The whole process took around 35-40 minutes.
Tips: For technical, have a solid command over all the fundamentals of important subjects. You need to start early. 3rd year is a good time to plan and start your preparation. In your summer holidays before 7th semester, don't focus your full attention on your training. It is also important but you need to take out some extra time for aptitude building, revising concepts and enhancing your communication skills. Be confident and be honest. Try to make the conversation as interesting as possible. Try to be more interested in the company. If possible, do a little homework about the company visiting your college. It will prove to be useful and certainly will give you an edge above others.

Round: HR Interview
Experience: It had hardly been 15 minutes after the completion of my technical interview and I was called for the HR round. Again it started with “tell me about yourself” but this time the lady asked me everything about my family, my schooling, my interests and all. It was a really good 30 minutes spent as the conversation was really interesting. Then she asked me whether I had any problems in relocation. Then it led to a good discussion about how is life different in Hyderabad and Chennai. I asked her a little bit about her education and how she started a formal career in management. She was very happy to respond. Lastly, there were some concluding remarks, a formal thank you and the interview was over.
Tips: Make the interview as interactive as possible. Ask a lot of questions. The person should know that you are really interested in the company. Prepare good answers for HR round well in advance.Any extracurricular activities that you have been a part of may come up in the HR/Managerial round. I was asked what have you done in your college life so far other than studies. I had a lot to say in that matter as i was involved in dramatics, debating, quizzing and other activities right from the school level. They may be interested to know how efficiently have you handled any complex or challenging situations in your life. I was the Event Executive of Fashion Show "PANACHE" in BLITZSCHLAG'13. I explained to HR what all I did to make that event a success and she was really impressed with it.

General Tips: CGPA matters. Not always but definitely it's a point worth considering when the interviewers are confused even after the completion of all the rounds about which students to select.Although not specific to this company, but other companies give a lot of credit to CGPA. It is an important factor along with the 1st written round for the shortlisting of candidates.So, maintain as good a CGPA as you can.In your technical interview you are going to be asked about at least one project that you have been involved in your college life. If some project is mentioned in your CV, it is certain that the interviewer will ask you about it. I have seen discussions as long as 1 hour or more on one's project itself.
College Name: NIT JAIPUR

Skills evaluated in this interview

Deutsche Telekom Interview FAQs

How many rounds are there in Deutsche Telekom Software Engineer interview?
Deutsche Telekom interview process usually has 1-2 rounds. The most common rounds in the Deutsche Telekom interview process are Technical.
How to prepare for Deutsche Telekom Software Engineer interview?
Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at Deutsche Telekom. The most common topics and skills that interviewers at Deutsche Telekom expect are Angularjs, ASP.Net, C#, Bootstrap and CSS.
What are the top questions asked in Deutsche Telekom Software Engineer interview?

Some of the top questions asked at the Deutsche Telekom Software Engineer interview -

  1. Share your screen, write a API to get the logs of a spring boot application in ...read more
  2. Find the largest number in an Array without DS and loop in Java...read more
  3. Find all the permutation of the Arr...read more

Tell us how to improve this page.

Deutsche Telekom Software Engineer Interview Process

based on 4 interviews

1 Interview rounds

  • Technical Round
View more
Deutsche Telekom Software Engineer Salary
based on 178 salaries
₹8 L/yr - ₹32 L/yr
112% more than the average Software Engineer Salary in India
View more details

Deutsche Telekom Software Engineer Reviews and Ratings

based on 15 reviews

2.4/5

Rating in categories

2.6

Skill development

3.1

Work-life balance

2.7

Salary

3.0

Job security

2.2

Company culture

2.2

Promotions

2.6

Work satisfaction

Explore 15 Reviews and Ratings
Software Engineer
178 salaries
unlock blur

₹8 L/yr - ₹32 L/yr

Senior Software Engineer
106 salaries
unlock blur

₹13.5 L/yr - ₹38 L/yr

Software Developer
52 salaries
unlock blur

₹7 L/yr - ₹28 L/yr

Sdet
36 salaries
unlock blur

₹7.5 L/yr - ₹27 L/yr

Devops Engineer
26 salaries
unlock blur

₹7 L/yr - ₹19.7 L/yr

Explore more salaries
Compare Deutsche Telekom with

Ericsson

4.1
Compare

Nokia

4.1
Compare

Huawei Technologies

4.0
Compare

BT Group

3.9
Compare
Did you find this page helpful?
Yes No
write
Share an Interview