Commonly Asked UVM Interview Questions in 2025
UVM Verification Interview Questions and Answers(2024) Below are commonly asked UVM Verification interview questions and answers to prepare you for your interview:
What is UVM?
UVM stands for Universal Verification Methodology. It is a standard for verification that can be utilized with any design or verification language.
Can you explain what a sequence item is in the context of UVM?
A sequence item represents a specific piece of data passed between two components in a UVM testbench. It may represent a single bit, byte, word, or larger data chunk, with associated fields and methods for manipulation.
What are virtual sequences? When should they be used?
Virtual sequences are used to verify design functionality by generating traffic directed at the DUT and checking for proper response. They should be used when verifying DUT functionality and response.
What is a factory? Why do you need it when working with UVM?
A factory creates and manages objects in UVM, facilitating communication and information sharing between verification environment parts.
What happens when a uvm_sequence gets aborted or ends normally?
When a uvm_sequence gets aborted, it stops executing and restarts from the beginning. If it ends normally, it continues to the next sequence.
Is there a way to end a sequence prematurely?
Yes, a sequence can be ended prematurely using the uvm_fatal or uvm_stop macros.
What’s the difference between an action and a callback in UVM?
An action is code executed in response to an event, while a callback executes code when a certain condition is met.
How can you define custom types for use in your env?
Custom types can be defined using the typedef command in UVM env, facilitating the creation of custom data types.
Are there any risks associated with using generics in UVM? If yes, then can you list them all?
Yes, using generics in UVM may lead to code readability issues and verification errors.
What is the best way to create unique names for various instances of UVM components?
Using the uvm_component_name macro automatically generates unique names for component instances.
What’s the main advantage of using macros in UVM code?
Using macros in UVM code leads to more concise and readable code.
How can you configure multiple agents in UVM?
Multiple agents can be configured in UVM using the uvm_config_db class.
What are the advantages and disadvantages of using UVM over SystemVerilog OOPs?
UVM provides a standardized methodology for verification but may be more complex to learn compared to SystemVerilog OOPs.
What is the process followed by a driver to send data to its connected DUT port?
The driver initializes data structures, configures the DUT port, writes data, and waits for a response.