Wireless Engineer Interview Questions | Glassdoor

# Wireless Engineer Interview Questions

41

Wireless engineer interview questions shared by candidates

## Top Interview Questions

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### DSP Firmware Engineer Wireless Modem at Qualcomm was asked...

Feb 14, 2010
 Given 2 32 bit numbers, how do u multiply them using 8bit multipliers? 1 Answer Let A1A2A3A4 & B1B2B3B4 be the 32 bit numbers. (A1A2 00 + 00A3A4)*(B1B2 00 + 00B3B4) should give an idea as to implemt the 32-bit multiplication using 8 bit mult.

### Senior Wireless Systems Engineer at Vivint was asked...

Sep 17, 2014
 Where do you want to be in 5 years. 1 Answer Sitting on your side of the desk or taking on a director role.

### DSP Firmware Engineer Wireless Modem at Qualcomm was asked...

Feb 14, 2010
 qtns abt OFDM, qtns abt cyclic prefix, qtns abt wideband channel, qtns abt block convolution: overlap save 1 Answer These qtns where to test the DSP, Communication Theory background.

### Wireless Engineer at Alcatel-Lucent was asked...

Oct 17, 2012
 4G to 3G lte RAU/TAU senario 1 Answer was ok

### DSP Firmware Engineer Wireless Modem at Qualcomm was asked...

Feb 14, 2010
 Given 25 red balls & 25 blue balls. Arrange them in 2 bowls such that when a ball is picked randomly from one of bowls, the probability of picking red ball is maximum?? 1 Answer put 1red ball & 0 blue balls in one bowl. The rest of the balls goes to the second bowl. The probability of picking red ball is .745

### DSP Firmware Engineer (Wireless Modem) at Qualcomm was asked...

Jan 6, 2010
 Swap two numbers without using a temporary variable 2 Answers x = 10 y = 5 x = x+y // x = 15, y =5 y = x-y // x = 15 , y = 10 x = x-y // x = 15 - 10 = 5 , y = 10 another way, x = x^y y = x^y x = x^y Shift register.

### Wireless Systems Test Engineer at Qualcomm was asked...

Mar 23, 2011
 When you get higher throughput: while going at 5mph and while going at 50 mph? And Why? 2 Answers high mobility communication is more difficult. You will get higher a throughput while going at 5mph. Higher speeds indicates that the RF channel conditions such as delay and Doppler spread are changing at fast rate and its a fast fading channel. It is difficult to achieve equalization in such situation. Hence the modulation scheme can be shot down to, say QPSK(2 bits/symbol) from maybe 16QAM(4 bits/symbol) to provide a more robust transmission. This brings down the user throughput.

### Wireless Software Test Engineer at Baxter was asked...

Jun 11, 2015
 Why do you want to work here

### Wireless Firmware Engineer at Qualcomm was asked...

Sep 25, 2016
 Tell us C- storage classes, type qualifiers? 1 Answer What is big Endian and little Endian?

### Wireless Firmware Engineer at Qualcomm was asked...

Sep 25, 2016
 Tell us C- storage classes, type qualifiers? 1 Answer What is big Endian and little Endian?
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