Interview questions for Digital Logistic manager

1. What Is Glitch? What Causes It (explain With Waveform)? How To Overcome It?

The following figure shows a synchronous alternative to the gated clock using a data path. The flipflop is clocked at every clock cycle and the data path is controlled by an enable. When the enable is Low, the multiplexer feeds the output of the register back on itself. When the enable is High, new data is fed to the flipflop and the register changes its state,

2. What Is Difference Between Latch And Flipflop?

The main difference between latch and FF is that latches are level sensitive while FF are edge sensitive. They both require the use of clock signal and are used in sequential logic. For a latch, the output tracks the input when the clock signal is high, so as long as the clock is logic 1, the output can change if the input also changes. FF on the other hand, will store the input only when there is a rising/falling edge of the clock.

3. Difference Between Heap And Stack?

The Stack is more or less responsible for keeping track of what’s executing in our code (or what’s been “called”). The Heap is more or less responsible for keeping track of our objects (our data, well… most of it – we’ll get to that later.).
Think of the Stack as a series of boxes stacked one on top of the next. We keep track of what’s going on in our application by stacking another box on top every time we call a method (called a Frame). We can only use what’s in the top box on the stack. When we’re done with the top box (the method is done executing) we throw it away and proceed to use the stuff in the previous box on the top of the stack.

4. How do you ensure that you are up to date with the latest engineering techniques and trends?

The ideal candidate should have experience staying current with all the latest engineering techniques. In design engineering, there are many new processes and technology that emerge throughout the year. A good candidate will know how to sort through the latest trends and techniques to find ones that mesh well with the industry.

5. Is there a source that the applicant uses to examine engineering trends? 

As a design engineer, I sort through the latest engineering breakthroughs and processes over the weekend. I make sure to vet each process before implementing it at work.

6. Difference Between Onehot And Binary Encoding?

Common classifications used to describe the state encoding of an FSM are Binary (or highly encoded) and One hot.
A binaryencoded FSM design only requires as many flipflops as are needed to uniquely encode the number of states in the state machine. The actual number of flipflops required is equal to the ceiling of the logbase2 of the number of states in the FSM.
A onehot FSM design requires a flipflop for each state in the design and only one flipflop (the flipflop representing the current or “hot” state) is set at a time in a one hot FSM design. For a state machine with 916 states, a binary FSM only requires 4 flipflops while a onehot FSM requires a flipflop for each state in the design FPGA vendors frequently recommend using a onehot state encoding style because flipflops are plentiful in an FPGA and the combinational logic required to implement a onehot FSM design is typically smaller than most binary encoding styles.

7. What are the interview questions for Qualcomm digital design engineer?

The second interview had some questions, they are: 1. Frequency divider circuits. 2. JK flip flop truth table and circuit gate based implementation. 3. Sequence detector using FSM for 00100 overlapping. 4. Usage of clock in sequential circuits

8. In your opinion, what is the most important skill to have as a design engineer?

Design engineers must have many abilities, such as a working knowledge of CAD software, creativity and excellent communication skills. Focus on how the applicant defends the skill mentioned. Is that ability something that aligns with the position as well as your company’s values? The ideal candidate will explain why it is essential as a design engineer and their level of expertise with this specific skill set. What to look for in an answer:

9. What are the interview questions for a design engineer?

During the different stages of designing, developing, and creating new products,design engineers have to work and collaborate with a range of internal and external stakeholders. This question allows interviewers to find out how comfortable candidates are with group interactions and if they have the necessary group presentation skills

The most important skill to have as a design engineer is the ability to adapt. There are new situations in the design world that one must be able to handle no matter the industry.”

10. Implement An And Gate Using Mux?

This is the basic question that many interviewers ask. for and gate, give one input as select line,incase if u r giving b as select line, connect one input to logic ‘0’ and other input to a.

11. What Will Happen If Contents Of Register Are Shifter Left, Right?

It is well known that in left shift all bits will be shifted left and LSB will be appended with 0 and in right shift all bits will be shifted right and MSB will be appended with 0 this is a straightforward answer What is expected is in a left shift value gets Multiplied by 2 eg:consider 0000_1110=14 a left shift will make it 0001_110=28, it the same fashion right shift will Divide the value by 2.

12. What Are The Differences Between A Flip-flop And A Latch?

o Flip-flops are edge-sensitive devices where as latches are level sensitive devices.
o Flip-flops are immune to glitches where are latches are sensitive to glitches.
o Latches require less number of gates (and hence less power) than flip-flops.
o Latches are faster than flip-flops.

13. What Is The Difference Between Mealy And Moore Fsm?

Mealy FSM uses only input actions, i.e. output depends on input and state. The use of a Mealy FSM leads often to a reduction of the number of states.
Moore FSM uses only entry actions, i.e. output depends only on the state. The advantage of the Moore model is a simplification of the behavior.