MediaTek India Technology DSL Engineer Interview Questions and Answers

It consisted of aptitude questions, then OS C 1mrks, which were re GATE questions. No coding, I chose hardware role, so questions were from digital electronics too. prepare the gate questions for these subjects

Q1. Question were from vlsi and SOC design
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Q2. Then questions on optimizations in vlsi were asked.
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Q1. Family and background check
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Q2. Resume and projects
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Basic ece ques and apti

Q1. What are flip flops and latches
Ans. 
Flip flops and latches are sequential logic circuits used in digital electronics to store and transfer data.
• Flip flops are clocked circuits that store one bit of data, while latches are level-sensitive circuits that store data as long as the enable signal is active.

• Flip flops are edge-triggered, meaning they change state on a clock edge, while latches are level-triggered, changing state as long as the enable signal is ...read more
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Q2. Verilog projects
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Was asked details of scanning electron microscopy

Aptitude, Digital Electronics.

Questions on dgital electronics and circuits

Q1. Questions on digital electronics , STA and FSM and Verilog
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Q1. What is modulation, and what are the different types of modulation schemes.
Ans. 
Modulation is the process of varying a carrier signal to transmit information. Different types include AM, FM, PM, and QAM.
• Modulation is used to transfer information by varying a high-frequency carrier signal.

• Amplitude Modulation (AM) varies the amplitude of the carrier signal to encode information.

• Frequency Modulation (FM) varies the frequency of the carrier signal to encode information.

• Phase Modulation (PM) varies th...read more
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Q1. What is S-matrix?
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S-matrix is a mathematical representation used in RF engineering to describe the relationship between input and output signals of a linear system.
• S-matrix is also known as scattering matrix.

• It is used to analyze the behavior of RF circuits and systems.

• S-matrix elements represent the complex amplitudes of the incident and reflected waves at each port of a network.

• S11 parameter represents the reflection coefficient at po...read more
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Q2. Where can you different types analog modulation schemes?
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Different types of analog modulation schemes can be found in various communication systems.
• Analog modulation schemes are used in radio broadcasting, television transmission, and wireless communication.

• Some common types of analog modulation schemes include amplitude modulation (AM), frequency modulation (FM), and phase modulation (PM).

• AM is used in AM radio broadcasting, where the amplitude of the carrier signal is vari...read more
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Q3. What is VSWR and what is the need for it?
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VSWR stands for Voltage Standing Wave Ratio. It is a measure of how well a transmission line is matched to the impedance of the connected devices.
• VSWR is a ratio of the maximum voltage to the minimum voltage along a transmission line.

• It is used to measure the efficiency of power transfer and the impedance matching in RF systems.

• A lower VSWR indicates better impedance matching and less power loss.

• VSWR is important in RF...read more
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Q1. What is a standing wave in a transmission line?
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A standing wave in a transmission line is a wave that appears to be stationary, resulting from the interference of two waves traveling in opposite directions.
• A standing wave is formed when a wave traveling in one direction reflects back upon encountering an impedance mismatch in the transmission line.

• The interference between the incident and reflected waves creates regions of constructive and destructive interference, ...read more
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Q2. Draw waveforms of Amplitude and FM/PM modulation scheme?
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Amplitude modulation (AM) and frequency modulation (FM) waveforms can be represented graphically.
• AM modulation: The amplitude of the carrier signal is varied in proportion to the amplitude of the modulating signal.

• FM modulation: The frequency of the carrier signal is varied in proportion to the amplitude of the modulating signal.

• Waveforms can be drawn to show the variations in amplitude or frequency over time.

• AM wavefo...read more
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Q3. What is the propagation delay in Electromagnetic wave?
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Propagation delay is the time it takes for an electromagnetic wave to travel from one point to another.
• Propagation delay is determined by the distance between the two points and the speed of light.

• It is the time it takes for the wave to propagate through a medium or free space.

• Propagation delay can be calculated using the formula: delay = distance / speed of light.

• For example, if the distance between two points is 100 ...read more
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Q4. Draw Transmitter and Receiver for a communication system.
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A transmitter and receiver are essential components of a communication system.
• Transmitter converts information into a suitable form for transmission.

• Receiver receives the transmitted signal and converts it back into the original form.

• Transmitter typically includes a modulator, power amplifier, and antenna.

• Receiver typically includes an antenna, demodulator, and audio or video output.

• Example: In a radio communication sy...read more
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