Comtech Info Solution Field Engineer Interview Questions and Answers

Q1. What is transformer
Ans. 
A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.
• Transformers are commonly used in power distribution systems to step up or step down voltage levels.

• They consist of two or more coils of wire, known as windings, that are wound around a core made of magnetic material.

• The primary winding receives electrical energy from a power source, whi...read more
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Q2. Transformer is a step up or step down the current
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Coding is programming where we use to test a software

Q1. Abou FTTH architecture
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Q1. What is telecommunication
Ans. 
Telecommunication is the transmission of information over a distance for the purpose of communication.
• Telecommunication involves the use of electronic devices to transmit information

• It can be done through various means such as radio, television, telephone, internet, etc.

• Examples include sending text messages, making phone calls, watching TV, browsing the internet, etc.
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Q2. What is insulator and conductors and semiconductors
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Insulators, conductors, and semiconductors are materials that have different abilities to conduct electricity.
• Insulators are materials that do not conduct electricity well, such as rubber or glass.

• Conductors are materials that conduct electricity well, such as copper or aluminum.

• Semiconductors are materials that have properties of both insulators and conductors, such as silicon or germanium.

• The ability of a material to...read more
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Q3. What is transistor and how it's work
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A transistor is a semiconductor device used to amplify or switch electronic signals and power.
• Transistors are made of semiconductor materials like silicon or germanium.

• They have three layers - emitter, base, and collector.

• Transistors can be used as amplifiers or switches in electronic circuits.

• They work by controlling the flow of electrons through the base layer.

• Examples of transistor applications include radios, compu
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Q4. What is LED and how it's work
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LED stands for Light Emitting Diode. It is a semiconductor device that emits light when an electric current is passed through it.
• LEDs are energy-efficient and have a longer lifespan compared to traditional incandescent bulbs.

• They are commonly used in electronic devices, traffic lights, and automotive lighting.

• LEDs work by converting electrical energy into light energy through a process called electroluminescence.

• They c...read more
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Q5. What is photo diode and photo emissivity
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A photo diode is a semiconductor device that converts light into electrical current. Photo emissivity is the ability of a material to emit electrons when exposed to light.
• Photo diodes are commonly used in optical communication systems and light sensors.

• Photo emissivity is important in the design of photoelectric devices such as solar cells and photomultiplier tubes.

• The efficiency of a photoelectric device depends on th...read more
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Q6. Photo diode is a two terminal reverse biased semiconductor device device.photo emissivity is a process of liberation of electrons from the metal surface by the application of light energy
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Q7. What is integrated circuit and uses
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Integrated circuit is a miniaturized electronic circuit consisting of active and passive components on a single semiconductor chip.
• ICs are used in almost all electronic devices, from smartphones to computers to cars.

• They are used to perform a variety of functions, such as amplification, switching, and signal processing.

• ICs have revolutionized the electronics industry by making devices smaller, faster, and more efficien...read more
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Q8. Application of transistors explain
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Transistors are used to amplify or switch electronic signals in various electronic devices.
• Transistors are used in amplifiers, oscillators, and digital circuits.

• They can be used to amplify weak signals, such as in a radio receiver.

• Transistors can also be used as switches, turning on and off electronic circuits.

• Examples of devices that use transistors include computers, televisions, and smartphones.
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Q9. Explain intrinsic semiconductor
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An intrinsic semiconductor is a pure semiconductor with no impurities added.
• Intrinsic semiconductors have equal numbers of electrons and holes.

• They have a low conductivity at room temperature.

• Examples include silicon and germanium.

• They are used in electronic devices such as diodes and transistors.
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Q1. Reasons for low throughput in 4g
Ans. 
Low throughput in 4G can be caused by various factors.
• Interference from other devices or networks

• Limited bandwidth

• Distance from cell tower

• Congestion in the network

• Hardware or software issues

• Inadequate backhaul capacity

• Poor signal strength

• Inefficient network architecture
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Q2. Kpi in details 4g & lte advance
Ans. 
KPIs for 4G and LTE Advanced
• KPIs for 4G and LTE Advanced include network availability, throughput, latency, and packet loss

• Network availability measures the percentage of time the network is available to users

• Throughput measures the amount of data that can be transmitted over the network in a given time period

• Latency measures the time it takes for data to travel from the source to the destination

• Packet loss measures th...read more
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Q1. What is mix design
Ans. 
Mix design is the process of determining the proportions of ingredients in a concrete mixture to achieve the desired properties.
• Mix design involves selecting the type and proportion of cement, aggregates, water, and admixtures.

• It considers factors such as strength, workability, durability, and economy.

• The design is based on laboratory testing and analysis of materials.

• Example: A mix design for a high-strength concrete ...read more
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Q2. What is gauge of binding wire
Ans. 
The gauge of binding wire refers to its thickness or diameter.
• The gauge of binding wire is determined by its diameter.

• It is commonly measured using the American Wire Gauge (AWG) system.

• Thicker wires have lower gauge numbers, while thinner wires have higher gauge numbers.

• For example, a binding wire with a gauge of 16 is thicker than a wire with a gauge of 22.
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Q3. What is w/c ratio of M20 grade of concrete
Ans. 
The water-cement ratio (w/c) of M20 grade concrete is typically 0.45.
• The w/c ratio is the ratio of the weight of water to the weight of cement in a concrete mix.

• For M20 grade concrete, the w/c ratio is generally recommended to be 0.45.

• This means that for every 1 kg of cement, 0.45 kg of water is used.

• The w/c ratio affects the strength, workability, and durability of the concrete mix.
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