Texas Instruments Asic Design Verification Engineer Interview Questions and Answers

Toggle the bits of given input

• Create a mask with all bits set to 1

• XOR the input with the mask to toggle the bits

• Repeat the process for each bit position

Print a star pattern using loops

• Use nested loops to print the desired pattern

• Increment the number of stars in each row to create the pattern

• Example: for a pattern with 5 rows - * , ** , *** , **** , *****

Cross talk is the unwanted transfer of signals between different components or traces on a circuit board.

• Occurs when signals from one trace interfere with signals on another trace

• Can lead to signal distortion or errors in data transmission

• Prevented by proper spacing and shielding between traces

• Example: Cross talk between data lines on a PCB causing errors in communication

Generated clocks through edges are defined by specifying the source clock and the edge on which the generated clock is based.

• Specify the source clock for the generated clock

• Define the edge (rising/falling) on which the generated clock is based

• Use tools like Synopsys Design Compiler to define generated clocks

UVM (Universal Verification Methodology) basic principle is to provide a standardized methodology for verifying digital designs.

• UVM is based on SystemVerilog and provides a framework for creating reusable verification environments

• It promotes the use of object-oriented programming techniques for creating modular and scalable testbenches

• UVM encourages the use of constrained-random stimulus generation and coverage-driven ...read more

Coverage-driven verification techniques are used to ensure all possible state transitions are exercised.

• Coverage metrics like state, transition, and toggle coverage can be used to track the completeness of state transitions.

• Writing directed tests to cover specific state transitions can help achieve higher coverage.

• Random stimulus generation can also be used to explore different state transitions.

• Functional coverage can...read more

To predict if a 32 bit number is divisible by 8, design a circuit using gates.

• Use a circuit with AND, OR, and NOT gates to check if the last three bits of the number are all zeros.

• If the last three bits are zeros, then the number is divisible by 8.

• For example, if the 32 bit number is 11010000, the last three bits are zeros, so it is divisible by 8.