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Rivoli Group Interview Questions and Answers
Q1. calculate the set and hold slack from the timing parameters
Set and hold slack are calculated by subtracting the required time from the actual time for setup and hold constraints.
Set slack = Actual arrival time - Required arrival time for setup constraint
Hold slack = Required arrival time - Actual arrival time for hold constraint
Positive slack indicates the timing constraint is met, negative slack indicates violation
Example: Set slack = 0.2ns, Hold slack = -0.1ns
Q2. how the E2E ECC is implemented
E2E ECC (End-to-End Error Correction Code) is implemented through algorithms that detect and correct errors in data transmission.
E2E ECC algorithms are used to ensure data integrity from the source to the destination.
These algorithms add redundant bits to the data being transmitted, allowing for error detection and correction.
Examples of E2E ECC algorithms include Reed-Solomon codes and Hamming codes.
Q3. Difference between verilog and system verilog
Verilog is a hardware description language used for digital circuit design, while SystemVerilog is an extension that adds features for verification and design.
Verilog is used for digital circuit design, while SystemVerilog is used for verification and design
SystemVerilog includes features like classes, randomization, and assertions for verification purposes
Verilog is more focused on describing the behavior of hardware components, while SystemVerilog adds features for testbenc...read more
Q4. write verilog code for mod 3 counter
Verilog code for a mod 3 counter is a sequential circuit that counts in binary from 0 to 2 and then resets to 0.
Use a 2-bit register to store the current count value.
Increment the count value on each clock cycle.
Reset the count value to 0 when it reaches 3.
Q5. Difference between flip flops and latch
Flip flops and latches are both sequential logic circuits, but flip flops are edge-triggered while latches are level-triggered.
Flip flops are edge-triggered, meaning they change state only on a clock edge.
Latches are level-triggered, meaning they change state as long as the enable signal is active.
Flip flops are more commonly used in synchronous systems for data storage and transfer.
Latches are simpler in design and faster in operation compared to flip flops.
Examples of flip ...read more
Q6. Asynchronous fifo Counter code
Asynchronous FIFO counter code is used to implement a FIFO buffer with asynchronous read and write operations.
Asynchronous FIFO is a type of FIFO buffer where the read and write operations are not synchronized.
The counter code is used to keep track of the number of elements in the FIFO buffer.
Example code snippet: int counter = 0; // Initialize counter for FIFO buffer
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