SG Enterprises Interview Questions and Answers

UVM can be used to create a testbench environment and integrate it with c based test cases using DPI-C.

• Create a UVM testbench environment using SystemVerilog

• Use DPI-C to integrate the c based test cases with the UVM environment

• Define a DPI import function in SystemVerilog to call the c functions

• Use UVM sequences to drive the test cases

• Use UVM scoreboard to verify the results

• Use UVM coverage to ensure complete coverage of the design

Scoreboard is a verification component that tracks and compares expected and actual data.

• Scoreboard is used to monitor the progress of a design under test (DUT) and compare it with the expected behavior.

• It can be implemented using a register or a memory block.

• Scoreboard can be used to check the correctness of the DUT's output against the expected output.

• Expected data can be obtained from a reference model or a golden model.

• Scoreboard can be used in conjunction with other veri...read more

Tasks are concurrent blocks of code that can run in parallel, while functions are sequential blocks of code that perform a specific task.

• Tasks can run concurrently, while functions run sequentially

• Tasks can be executed in parallel, while functions are executed one after the other

• Tasks are used for parallel processing, while functions are used for sequential processing

FSM code for pattern detector

• Define states for different patterns to detect

• Transition between states based on input pattern

• Output a signal when a specific pattern is detected

Blocking operations wait until the operation completes, while non-blocking operations do not wait and allow other operations to continue.

• Blocking operations halt the execution until the operation is completed

• Non-blocking operations do not halt the execution and allow other operations to continue

• Blocking operations are synchronous, while non-blocking operations are asynchronous

• Example: In a blocking operation, a function call will wait for the function to return before proceed...read more

Polymorphism in SystemVerilog allows objects of different types to be treated as objects of a common base type.

• Polymorphism allows for more flexibility and reusability in code

• It enables the use of virtual methods to be overridden in derived classes

• Example: Using a base class to define common methods and then creating derived classes that implement those methods differently

Inheritance in SystemVerilog allows a class to inherit properties and methods from another class.

• Inheritance allows for code reusability and promotes a hierarchical structure.

• Derived class inherits properties and methods from the base class.

• Derived class can also have its own unique properties and methods.

• Example: class B extends class A, where B inherits properties and methods from A.

A full adder can be designed using two half adders and an OR gate.

• Use one half adder to add two of the three inputs (A and B)

• Use the second half adder to add the output of the first half adder with the third input (Cin)

• Use an OR gate to combine the carry outputs of both half adders to get the final carry out

• The sum output is the XOR of the outputs of both half adders