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MosChip Technologies Interview Questions and Answers

Updated 8 Jan 2025

Q1. What is factory override in UVM?

Ans.

Factory override in UVM allows users to replace default factory methods with custom implementations.

  • Factory override is used to customize the behavior of UVM components without modifying the original source code.

  • It allows users to replace default factory methods with custom implementations to meet specific requirements.

  • Factory override can be useful for debugging, testing, or adding new features to existing UVM components.

  • Example: Overriding the default create method in a UVM...read more

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Q2. What is m_sequencer and p_sequencer?

Ans.

m_sequencer and p_sequencer are components used in design and verification for sequencing operations.

  • m_sequencer and p_sequencer are commonly used in digital design for controlling the sequence of operations.

  • m_sequencer typically refers to a master sequencer, while p_sequencer refers to a peripheral sequencer.

  • These components are often used in verification environments to ensure proper sequencing of events.

  • For example, m_sequencer may control the overall flow of a testbench, ...read more

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Q3. What is the call back in UVM?

Ans.

A call back in UVM is a mechanism used to notify a component about a specific event or condition.

  • A call back is defined using a function or task in the UVM component.

  • It is registered with the UVM framework to be executed when a certain event occurs.

  • Call backs are commonly used for handling events like transaction completion or error detection.

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Q4. how to fix antenna violation?

Ans.

Antenna violations can be fixed by adjusting the metal layers, adding shielding, or changing the routing.

  • Adjust metal layers to increase spacing between antennas

  • Add shielding to isolate antennas from each other

  • Change routing to avoid crossing antennas

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Q5. What is Mos capacitor

Ans.

A MOS capacitor is a metal-oxide-semiconductor structure used in integrated circuits for storing charge.

  • Consists of a metal gate separated from a semiconductor substrate by a thin insulating layer

  • Used in various applications such as DRAM cells and analog circuits

  • Capable of storing charge and modulating the capacitance based on the voltage applied

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Q6. What is Mirror circuit

Ans.

A mirror circuit is a circuit configuration where two transistors are connected in a way that their characteristics are mirrored.

  • Consists of two transistors with their bases connected together

  • Used to replicate a current or voltage with high accuracy

  • Commonly used in current mirrors and voltage mirrors

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Q7. What are the type of testing you use?

Ans.

I use various types of testing such as functional testing, performance testing, interoperability testing, and security testing.

  • Functional testing: Ensuring that the Bluetooth/WLAN features work as expected.

  • Performance testing: Evaluating the speed and responsiveness of the Bluetooth/WLAN connections.

  • Interoperability testing: Checking compatibility with different devices and networks.

  • Security testing: Assessing the security measures in place to protect Bluetooth/WLAN connectio...read more

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Q8. Explain the PD flow?

Ans.

PD flow is the process of designing and implementing the physical layout of an integrated circuit.

  • PD flow involves floorplanning, placement, routing, and physical verification.

  • Floorplanning determines the placement of blocks and macros on the chip.

  • Placement involves placing standard cells in the available space based on timing and area constraints.

  • Routing connects the placed cells using metal layers to create the final interconnections.

  • Physical verification checks for design ...read more

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Q9. Previous exp on domain specific

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