Firstsource Solutions Interview Questions and Answers

Interference is the addition of unwanted signals, while distortion is the alteration of the original signal.

• Interference is caused by external signals or noise that disrupt the desired signal.

• Distortion occurs when the original signal is altered or modified.

• Methods to eliminate interference include shielding, filtering, and using balanced connections.

• Distortion can be reduced by using high-quality components, equalization, and feedback techniques.

Diode, diac, triac, and SCR are all electronic components used in electrical circuits.

• Diode is a two-terminal device that allows current to flow in one direction.

• DIAC (Diode for Alternating Current) is a two-terminal device that conducts current in both directions when triggered.

• TRIAC (Triode for Alternating Current) is a three-terminal device that conducts current in both directions when triggered.

• SCR (Silicon Controlled Rectifier) is a three-terminal device that acts as a s...read more

Amplitude modulation (AM) and frequency modulation (FM) are techniques used in telecommunications to transmit information.

• Amplitude modulation (AM) is a modulation technique where the amplitude of the carrier signal is varied in proportion to the waveform being transmitted.

• Frequency modulation (FM) is a modulation technique where the frequency of the carrier signal is varied in proportion to the waveform being transmitted.

• AM is commonly used in broadcasting, such as AM radio ...read more

Separating audio from video signals involves extracting the audio component from the combined audio-video signal.

• Use audio extraction software or hardware to separate audio from video signals.

• Apply signal processing techniques to isolate the audio component.

• Utilize audio editing software to extract and save the audio separately.

• Examples: using video editing software like Adobe Premiere Pro, using audio extraction tools like FFmpeg.

Image processing is the manipulation and analysis of images using various algorithms and techniques.

• Image processing involves enhancing, restoring, and analyzing digital images.

• It is used in various fields like medical imaging, surveillance, remote sensing, and computer vision.

• Image processing techniques include filtering, segmentation, feature extraction, and pattern recognition.

• Examples of image processing applications include facial recognition, image restoration, and obje...read more

Feedback is a process in which a portion of the output of a system is fed back to the input, influencing the system's behavior.

• Feedback is a fundamental concept in control theory and oscillators.

• It involves taking a portion of the output signal and feeding it back to the input.

• Feedback can be positive or negative, depending on whether it reinforces or opposes the input signal.

• Positive feedback can lead to instability or oscillation, while negative feedback helps stabilize and...read more

A camera works by capturing light through a lens and converting it into an image using a photosensitive material or digital sensor.

• Light enters the camera through the lens

• The lens focuses the light onto a photosensitive material or digital sensor

• The photosensitive material or sensor converts the light into an electrical signal

• The electrical signal is processed and stored as an image

• Examples: film cameras use photosensitive film, digital cameras use image sensors