Ericsson

Engineering context

Ericsson supplies telecommunications network technology and services, including radio-network solutions. Communications, network behavior and software or RF fundamentals are useful according to the role. Official company reference.

Selection process

Use the current vacancy, official hiring communication and assessment instructions. Eligibility, tests, interview count and topics vary by role, location and hiring route; this guide does not verify a fixed sequence of company interview rounds.

What to revise

Digital communications, radio links, OFDM concepts, networking and troubleshooting; add programming for software roles.

Use the relevant subjects below as references; you do not need to revise every subject equally for every role.

• Networks & Circuits
• Signals & Systems
• Electronic Devices
• Analog Circuits
• Digital Circuits
• Control Systems
• Communications
• Electromagnetics
• Microprocessors & Embedded
• VLSI Design

Practice questions

These are original preparation questions, not a claim that the company asked them.

1. Explain the working principle of a 5G network. 5G NR uses flexible numerology and technologies such as MIMO and beamforming. Deployments can use lower as well as higher frequency bands; data rate and latency depend on spectrum and network design.

2. What is the difference between TDMA and FDMA? TDMA (Time Division Multiple Access) divides the channel into time slots, allowing multiple users to share the same frequency. FDMA (Frequency Division Multiple Access) allocates separate frequency bands to each user.

3. How do you design a low-pass filter? A low-pass filter can be designed using passive components like resistors and capacitors or active components like operational amplifiers. The design involves selecting the cutoff frequency and ensuring the desired attenuation characteristics.

4. What are the key components of a communication system? A communication system typically includes a transmitter, a communication channel, and a receiver. Each component plays a crucial role in encoding, transmitting, and decoding the information signal.

5. Describe the function of a microprocessor in an embedded system. A microprocessor in an embedded system acts as the central processing unit, executing instructions and managing data flow to perform specific tasks within the system.

6. What is the significance of VLSI in modern electronics? VLSI (Very Large Scale Integration) allows the integration of millions of transistors on a single chip, enabling the development of complex and compact electronic devices with enhanced performance and functionality.

Before the interview

• Review and update your resume with relevant projects and internships.
• Prepare to discuss any hands-on experience with telecommunications technologies.
• Research Ericsson's latest innovations and contributions to the telecommunications industry.
• Understand the company's core values and culture to align your responses during the HR interview.