Verilog Interview Questions

• What is the difference between $display and $monitor and $write and $strobe?
• What is the difference between code-compiled simulator and normal simulator?
• What is the difference between wire and reg?
• What is the difference between blocking and non-blocking assignments?
• What is the significance Timescale directivbe?
• What is the difference between bit wise, unary and logical operators?
• What is the difference between task and function?
• What is the difference between casex, casez and case statements?
• Which one preferred-casex or casez?
• For what is defparam used?
• What is the difference between “= =” and “= = =” ?
• What is a compiler directive like ‘include’ and ‘ifdef’?
• Write a verilog code to swap contents of two registers with and without a temporary register?
• What is the difference between inter statement and intra statement delay?
• What is delta simulation time?
• What is difference between Verilog full case and parallel case?
• What you mean by inferring latches?
• How to avoid latches in your design?
• Why latches are not preferred in synthesized design?
• How blocking and non blocking statements get executed?
• Which will be updated first: is it variable or signal?
• What is sensitivity list?
• If you miss sensitivity list what happens?
• In a pure combinational circuit is it necessary to mention all the inputs in sensitivity disk? If yes, why? If not, why?
• In a pure sequential circuit is it necessary to mention all the inputs in sensitivity disk? If yes, why? If not, why?
• What is general structure of Verilog code you follow?
• What are the difference between Verilog and VHDL?
• What are system tasks?
• List some of system tasks and what are their purposes?
• What are the enhancements in Verilog 2001?
• Write a Verilog code for synchronous and asynchronous reset?
• What is pli? why is it used?
• What is file I/O?
• What is difference between freeze deposit and force?
• Will case always infer priority register? If yes how? Give an example.
• What are inertial and transport delays ?
• What does `timescale 1 ns/ 1 ps’ signify in a verilog code?
• How to generate sine wav using verilog coding style?
• How do you implement the bi-directional ports in Verilog HDL?
• How to write FSM is verilog?
• What is verilog case (1)?
• What are Different types of Verilog simulators available?
• What is Constrained-Random Verification ?
• How can you model a SRAM at RTL Level?