Find Interview Questions for Top Companies
Ques:- Asked to draw the paper weight.
Right Answer:
To draw a paperweight, sketch a simple oval or rectangular shape with a slightly curved top. Add shading or texture to indicate weight and material, like glass or stone. Optionally, include a decorative element, such as a small flower or a design on the surface.
Ques:- Difference b/w KV and KWA
Right Answer:
KV (Kilovolt) is a unit of electrical voltage, while KVA (Kilovolt-Ampere) is a unit of apparent power in an electrical circuit. KV measures the potential difference, whereas KVA measures the total power used by the electrical system, including both active and reactive power.
Ques:- How will u define rating of a resistance?
Right Answer:
The rating of a resistor is defined by its resistance value (in ohms), power rating (in watts), and tolerance (percentage), which indicate how much the resistance can vary from its stated value.
Ques:- Wt do u mean by DTMF/
Right Answer:
DTMF stands for Dual-Tone Multi-Frequency. It is a signaling system used in telecommunication that generates a combination of two specific frequencies when a button on a telephone keypad is pressed, allowing the transmission of digits and control signals over phone lines.
Ques:- Explain in detail regarding fuse.
Right Answer:
A fuse is a safety device used in electrical circuits to protect against overcurrent. It consists of a metal wire or strip that melts and breaks the circuit when the current exceeds a certain level, preventing damage to the circuit and connected devices. Fuses are rated for specific current levels and must be replaced after they blow. They are typically used in household appliances, vehicles, and electrical panels to ensure safe operation.
Ques:- Civil tunnel design
Right Answer:
Civil tunnel design involves planning and constructing tunnels for transportation, utilities, or drainage. Key considerations include geological surveys, structural integrity, ventilation, drainage systems, safety measures, and environmental impact. The design process typically includes selecting the tunnel type (e.g., cut-and-cover, bored), determining dimensions, and ensuring compliance with engineering standards and regulations.
Ques:- Deviation of some items, accepted & changed
Right Answer:
To address deviations of items, establish clear acceptance criteria and change management processes. Regularly review item performance against these criteria, document any deviations, and implement necessary changes to align with standards.
Ques:- Difference between IGBT & MOSFET
Right Answer:
IGBT (Insulated Gate Bipolar Transistor) combines the features of MOSFET and BJT, offering high efficiency and fast switching for high voltage applications. MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) is primarily used for low to medium voltage applications and has faster switching speeds but lower current handling compared to IGBT.
Ques:- Solve this circuit and find the voltage across these two terminals circuit is nothing but self bias of CE configuration which is drawn by him on paper
Right Answer:

To help you solve the circuit for a self-bias Common Emitter (CE) configuration and find the voltage across the specified terminals, I’ll walk you through the standard steps. Since you’ve mentioned it’s drawn on paper and not shared visually here, I’ll assume the typical self-bias CE configuration.

🧠 Common Assumptions in a Self-Biased CE Amplifier:

  • Supply voltage: VCC

  • Resistors: RC (collector resistor), RE (emitter resistor), RB (base resistor from VCC), and optionally a bypass capacitor CE

  • BJT transistor: NPN type

  • We’re finding voltage across two terminals — assuming across collector and emitter (VCE)


🛠️ Step-by-Step Solution:

1. Calculate Base Voltage (VB):
Using the voltage divider formed by RB and RE:
VB = VCC × (RE / (RB + RE)) — only if base resistor goes to ground via RE
Alternatively, if base resistor goes to ground directly, use:
VB = VCC × (RB2 / (RB1 + RB2))

2. Base-Emitter Voltage (VBE):
Assume VBE ≈ 0.7V (for silicon transistor)
Then:
VE = VB − VBE

3. Emitter Current (IE):
IE = VE / RE

4. Collector Current (IC):
In active region, IC ≈ IE (since IC ≈ β/(β+1) × IE, and β is large)

5. Voltage across collector and emitter (VCE):
VCE = VCC − IC × RC − VE
  = VCC − (IC × RC + IE × RE)

Since IC ≈ IE, you can simplify:
VCE = VCC − IE(RC + RE)

Ques:- Difference between IGBT & MOSFET
Right Answer:

IGBT (Insulated Gate Bipolar Transistor) is best for high-voltage, high-power applications like inverters and motor drives. It switches slower but handles more power efficiently.

MOSFET (Metal-Oxide-Semiconductor FET) is faster and better for low to medium voltage tasks like DC-DC converters and power supplies.

📌 Key Difference:

  • MOSFET = Fast switching, low voltage

  • IGBT = High voltage, high power

Use MOSFETs for speed, IGBTs for strength.

Ques:- What is converter and explain about boost converter
Right Answer:

A converter is an electronic device that changes electrical energy from one form to another. In power electronics, converters are used to change voltage levels, current types (AC/DC), or frequency depending on the application.

There are several types of converters, such as:

  • AC to DC (Rectifier)

  • DC to AC (Inverter)

  • DC to DC (Buck, Boost, Buck-Boost)

  • AC to AC (Cycloconverter)

🟠 Boost Converter:

A boost converter is a type of DC-DC converter that increases (or “boosts”) the input voltage to a higher output voltage.

🔧 How it works:

  • It stores energy in an inductor when the switch (usually a transistor) is ON.

  • When the switch turns OFF, the energy from the inductor is released to the load through a diode, raising the output voltage.

  • A capacitor is used to smooth the output.

Ques:- What is your field of interest in your branch and tell something about auto CAD layouts?
Right Answer:
My field of interest is in architectural design and drafting. AutoCAD layouts are used to organize and present drawings in a structured way. They allow users to create different views of a project, manage scale, and include annotations and dimensions, making it easier to communicate design intent and details effectively.


A civilization is a complex and highly organized society that has reached a certain level of cultural and technological development. It represents a significant step beyond simpler hunter-gatherer or nomadic societies, often marked by the transition to a settled, agricultural lifestyle. While there is no single, universally accepted definition, a civilization is typically identified by a number of key characteristics that distinguish it from other forms of human organization.

One of the most fundamental features of a civilization is the presence of urban centers, or cities. These cities serve as hubs for commerce, governance, and culture, and they enable a larger, more concentrated population than is possible with a rural, agricultural society alone. This urban concentration, in turn, leads to a high degree of social stratification, where individuals are organized into distinct social classes, often based on wealth, power, or occupation. This specialization of labor allows for the development of crafts, arts, and professions that are not directly related to food production, such as artisans, priests, and soldiers.

Another hallmark of a civilization is the development of symbolic communication, most notably writing. Writing systems enable the recording of history, laws, religious texts, and economic transactions, providing a level of organization and institutional memory that is impossible in oral traditions. The ability to record and transmit complex information over time and distance is a powerful tool for a society’s growth and stability.

Furthermore, a civilization is defined by its political and economic structures. This includes a centralized government that can enforce laws, a robust economy that supports a diverse population, and public works projects like roads, irrigation systems, and monumental architecture. These large-scale projects require coordinated labor and demonstrate a society’s ability to plan and execute complex tasks. Finally, a shared culture, which includes a common language, religion, and artistic expression, binds the population together and provides a sense of collective identity.

Examples of ancient civilizations like Mesopotamia, ancient Egypt, and the Indus Valley all exhibit these characteristics, providing historical evidence for the interconnected factors that lead to the rise of complex human societies. The study of civilizations provides a window into the evolution of human organization, technology, and culture over millennia.

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