QUALCOMM is hiring Freshers and experience candidates for ENGINEER- WLAN TEST role. The details of the job, requirements and other information given below:
QUALCOMM IS HIRING : ENGINEER- WLAN TEST
- Qualification : Any bachelor’s degree candidates can apply.
- 0-2 years of experience candidates can apply.
- Good knowledge of WLAN protocols and networking.
- Very strong debugging/problem solving experience using network analyzers (Omni-peek, WireShark etc) and other relevant tools
- Strong experience and proficiency in python programming or any other programming language.
- Location: Hyderabad, Telangana, India
Don’t miss out, CLICK HERE (to apply before the link expires)
❓Common Interview Questions & Sample Answers
1. What is WLAN?
Answer:
WLAN stands for Wireless Local Area Network. It is a type of network that allows devices like smartphones, laptops, and tablets to connect to the internet or to each other without using wires. WLAN uses radio signals to connect devices within a short range, usually in homes, schools, or offices. The most common type of WLAN is Wi-Fi, which is based on IEEE 802.11 standards.
2. What are the different IEEE 802.11 standards?
Answer:
The IEEE 802.11 standards define how wireless networking works. Here are the key versions:
802.11a: Uses the 5 GHz band and supports speeds up to 54 Mbps.
802.11b: Uses the 2.4 GHz band and supports speeds up to 11 Mbps.
802.11g: Also uses 2.4 GHz but supports faster speeds up to 54 Mbps.
802.11n (Wi-Fi 4): Works on both 2.4 and 5 GHz bands and uses MIMO (Multiple Input Multiple Output) for speeds up to 600 Mbps.
802.11ac (Wi-Fi 5): Works only on the 5 GHz band and supports very high speeds, over 1 Gbps, using MU-MIMO and wider channels.
802.11ax (Wi-Fi 6): Works on both 2.4 and 5 GHz bands and improves performance in crowded environments. It uses technologies like OFDMA and TWT.
802.11be (Wi-Fi 7): The next-generation standard that supports wider channels (up to 320 MHz), higher speeds, and lower latency.
3. What is WPA/WPA2?
Answer:
WPA (Wi-Fi Protected Access) and WPA2 are security protocols used to protect wireless networks. WPA was introduced as a temporary solution to replace the old and weak WEP protocol. WPA2 is stronger and more secure, using a method called AES encryption to protect the data sent over Wi-Fi. Most modern Wi-Fi networks use WPA2 to keep hackers out and protect users’ personal information.
4. What is WPS (Wi-Fi Protected Setup)?
Answer:
WPS is a feature that helps users connect to a Wi-Fi network quickly and easily, especially when they don’t want to type in a long password. There are two common ways to use WPS: by pressing a button on the router or by entering a short PIN number. WPS is commonly used in home routers, but it is not always secure, so some people turn it off for safety reasons.
5. What is Wi-Fi Direct?
Answer:
Wi-Fi Direct allows two devices to connect directly to each other over Wi-Fi without using a router. This is useful when you want to transfer files between phones, print something from your laptop to a wireless printer, or play games with another device. It creates a one-on-one wireless connection, similar to Bluetooth, but faster and with a longer range.
6. What is Miracast?
Answer:
Miracast is a technology that allows you to mirror or cast your screen wirelessly from a phone, laptop, or tablet to a TV or monitor. It works over Wi-Fi Direct and does not need an internet connection or Wi-Fi router. For example, if you want to watch a video from your phone on a bigger screen, you can use Miracast to project it onto a TV that supports it.
7. What is WMM (Wi-Fi Multimedia)?
Answer:
WMM is a feature that improves the quality of audio, video, and voice over a Wi-Fi network. It gives higher priority to media traffic (like streaming or video calls) than to normal data (like file downloads). This helps prevent lag or delay during video calls or streaming, especially when many devices are connected to the same network.
8. What is u-APSD (Unscheduled Automatic Power Save Delivery)?
Answer:
u-APSD is a power-saving feature used in Wi-Fi networks. It allows devices like smartphones or tablets to save battery life by deciding when to “wake up” and receive data from the router. Instead of keeping the Wi-Fi radio on all the time, the device can sleep and only receive data when needed, which reduces power consumption.
9. What is 802.1X authentication?
Answer:
802.1X is a network access control method used mostly in companies or enterprise networks. When a user tries to connect to the network, 802.1X checks their username and password with a central server (called a RADIUS server). If the credentials are correct, access is granted. This makes sure that only authorized users can connect to secure networks.
10. What tools are used to debug Wi-Fi problems?
Answer:
To troubleshoot Wi-Fi issues, engineers use packet analyzers and debugging tools. The most popular tools include:
Wireshark: A free tool that captures and shows network packets in real time. You can analyze issues like connection failures or low speeds.
Omnipeek: A professional tool for advanced wireless debugging. It offers better support for WLAN testing than Wireshark in some cases.
Other tools include iperf (for testing speed), log viewers, and custom Python scripts for automation.
11. What is Wi-Fi 6 and Wi-Fi 7?
Answer:
Wi-Fi 6 (802.11ax) is the sixth generation of Wi-Fi. It improves performance in busy environments like offices or stadiums. It uses technologies like OFDMA to send data to multiple users at once and TWT (Target Wake Time) to help devices save power.
Wi-Fi 7 (802.11be) is the next version. It supports very high speeds using wider channels (up to 320 MHz), better multi-user performance, and very low latency, which is ideal for gaming and VR.
12. What is OFDMA and how does it help?
Answer:
OFDMA (Orthogonal Frequency Division Multiple Access) is a technology used in Wi-Fi 6 and 7. It allows the router to divide the wireless channel into small parts and send data to multiple devices at the same time. This is more efficient than previous technologies where only one device could transmit at a time. OFDMA helps improve speed and reduces delay, especially in crowded networks.
13. What is MU-MIMO?
Answer:
MU-MIMO (Multi-User Multiple Input, Multiple Output) allows a router to communicate with several devices at the same time. In older Wi-Fi versions, the router could only talk to one device at a time. MU-MIMO improves overall network speed and is especially helpful when many people are using the internet at the same time in the same area.
14. Can you write a basic Python script to read and filter logs?
Answer:
Yes! Here’s a simple Python script that opens a log file and prints only the lines that contain the word “Error”:
# Open the file in read mode
with open("logfile.txt", "r") as file:
# Loop through each line
for line in file:
# If "Error" is found in the line, print it
if "Error" in line:
print(line)
This script is useful for log analysis and can help find issues quickly in test reports or logs.
15. Why is Python important for this role?
Answer:
Python is widely used in Wi-Fi testing because it is simple to learn and powerful for automation. Test engineers often write Python scripts to automate repetitive tasks like running test cases, analyzing logs, or generating reports. Python also has many libraries for networking and data analysis, making it a useful tool for debugging and improving efficiency in WLAN testing.
Tips for Freshers
Learn Wireshark: Practice capturing packets from your own Wi-Fi.
Read about Wi-Fi 6 and 7: Focus on terms like OFDMA, MU-MIMO, TWT.
Write simple Python scripts: Automate small tasks like log parsing.
Watch YouTube tutorials on Wi-Fi basics.
Build a small project like a Wi-Fi scanner using Python and Scapy.
Join Our Telegram Group (1.9 Lakhs + members):- Click Here To Join
For Experience Job Updates Follow – FLM Pro Network – Instagram Page
For All types of Job Updates (B.Tech, Degree, Walk in, Internships, Govt Jobs & Core Jobs) Follow – Frontlinesmedia JobUpdates – Instagram Page
For Healthcare Domain Related Jobs Follow – Frontlines Healthcare – Instagram Page
For Major Job Updates & Other Info Follow – Frontlinesmedia – Instagram Page
