Quiz On Verilog Hdl & Digital Design

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| By Deepak Kumar
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Deepak Kumar
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  • 1/20 Questions

    The full form of VLSI is _______.

    • Very Long Single Integration
    • Very Least Scale Integration
    • Very Large Scale Integration
    • Very Long Scale Integration
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About This Quiz

Are you ready for a quiz on Verilog HDL & digital design quiz that we have designed here for you? Do you know what Verilog is? Verilog is known as a HARDWARE DESCRIPTION LANGUAGE (HDL). This language is used for describing a digital system. You can say a network switch or a microprocessor or a memory, or a flip−flop. Here are some questions that will let you know about the Verilog and digital design. All the best!

Quiz On Verilog Hdl & Digital Design - Quiz

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  • 2. 

    The FPGA is abbreviated as:

    • First programmable Gate Array

    • Field Programmable Gate Array

    • Field Post Gate Array

    • Field Program Gate Array

    Correct Answer
    A. Field Programmable Gate Array
    Explanation
    FPGA stands for Field Programmable Gate Array. It is a type of integrated circuit that can be programmed or reconfigured after manufacturing. This allows for flexibility and customization in electronic designs. The other options, "First programmable Gate Array," "Field Post Gate Array," and "Field Program Gate Array," do not accurately represent the correct abbreviation for FPGA.

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  • 3. 

    Verilog is case sensitive.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Verilog is a hardware description language used in digital circuit design. Being case sensitive means that Verilog treats uppercase and lowercase letters as distinct characters. This means that "A" and "a" would be considered different signals or variables in Verilog. Therefore, it is important to use consistent and correct capitalization when writing Verilog code to avoid any errors or confusion.

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  • 4. 

    ASIC stands for:

    • Application speedy integrated circuit

    • ​​​​​​​Application-specific integrated circuit

    • Advanced speed integrated circuit

    • Advanced standard integrated circuit

    Correct Answer
    A. ​​​​​​​Application-specific integrated circuit
    Explanation
    ASIC stands for Application-specific integrated circuit. This term refers to a type of integrated circuit that is specifically designed for a particular application or purpose. Unlike general-purpose integrated circuits, ASICs are customized to perform a specific set of functions, making them more efficient and cost-effective for specialized tasks. They are commonly used in various industries, such as telecommunications, automotive, and consumer electronics, to provide optimized solutions for specific requirements.

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  • 5. 

    Which among the following is a process of transforming RTL to a gate-level netlist?

    • Simulation

    • Optimization

    • Synthesis

    • Verification

    Correct Answer
    A. Synthesis
    Explanation
    Synthesis is the process of transforming RTL (Register Transfer Level) design into a gate-level netlist. It involves converting the high-level description of the design into a lower-level representation using gates and flip-flops. This process includes various steps such as technology mapping, logic optimization, and cell library mapping. The output of synthesis is a gate-level netlist that can be used for further steps in the design flow, such as physical design and verification.

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  • 6. 

    What is the default value of the reg data type?

    • 0

    • 1

    • Z

    • X

    Correct Answer
    A. X
    Explanation
    The default value of the reg data type is X. This means that if no value is assigned to a reg variable, it will automatically be assigned the value X.

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  • 7. 
     Match the following: - ProProfs

     Match the following:

    •  P – 3   Q – 2  R – 1

    •  P – 3   Q–1   R – 2

    • P – 2    Q –3    R –1

    • None

    Correct Answer
    A.  P – 3   Q – 2  R – 1
  • 8. 

    The digital logic family which has minimum power dissipation is:

    • TTL

    • RTL

    • DTL

    • CMOS

    Correct Answer
    A. CMOS
    Explanation
    CMOS (Complementary Metal-Oxide-Semiconductor) is the digital logic family that has minimum power dissipation. CMOS circuits are designed to consume very low power because they use complementary pairs of MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors) which have very low power consumption. Additionally, CMOS circuits have high noise immunity, high packing density, and wide operating voltage range, making them an ideal choice for low-power applications.

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  • 9. 

    The Gray code for decimal number 6 is equivalent to:

    • 1100

    • 1001

    • 0101

    • 0110

    Correct Answer
    A. 0101
    Explanation
    The Gray code is a binary numeral system where two consecutive values differ in only one bit position. In this case, the Gray code for decimal number 6 is 0101 because it differs from the previous value, 1001, in only one bit position. The first bit remains the same, the second bit changes from 0 to 1, the third bit remains the same, and the fourth bit changes from 1 to 0.

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  • 10. 

    (734)8=  ( )16

    • C1D

    • DC1

    • 1CD

    • 1DC

    Correct Answer
    A. 1DC
    Explanation
    The given question is asking for the hexadecimal representation of the octal number (734)8. To convert from octal to hexadecimal, we can first convert the octal number to binary and then from binary to hexadecimal. In this case, (734)8 is equal to (111011100)2 in binary. Then, we can group the binary digits into groups of four starting from the right and convert each group into its equivalent hexadecimal digit. Therefore, (111011100)2 is equal to (1DC)16 in hexadecimal.

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  • 11. 

    What is the time period of clock #20 clock = ~clock?

    • 10

    • 20

    • 40

    • 50

    Correct Answer
    A. 40
    Explanation
    The time period of a clock refers to the time it takes for the clock to complete one full cycle. In this case, the clock is represented by the symbol "~clock". The "~" symbol typically denotes the negation or opposite of a value. Therefore, "~clock" would represent the opposite direction or rotation of the clock. Since the time period of a clock remains the same regardless of its direction, the time period of "~clock" would still be the same as the original clock, which is 40.

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  • 12. 

    The hexadecimal number ‘A0’ has the decimal value equivalent to:

    • 80

    • 256

    • 100

    • 160

    Correct Answer
    A. 160
    Explanation
    The hexadecimal number 'A0' represents the decimal value 160. In hexadecimal, the letters A-F are used to represent the decimal values 10-15 respectively. So, A is equivalent to 10. Multiplying the decimal value of A (10) by 16 (the base of hexadecimal) and adding the decimal value of 0 gives us 160.

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  • 13. 

    A 2-input XOR gate can be worked as an Inverter (NOT Gate) if a =? & b =?

    • A = a  , b =0

    • A = a  , b =1

    • A = b  , b= a 

    • None

    Correct Answer
    A. A = a  , b =1
    Explanation
    The correct answer is a = a, b = 1. This is because in an XOR gate, the output is true (1) only when the two inputs are different. In this case, if a = a and b = 1, the inputs are different and the output will be true (1). Therefore, the XOR gate acts as an inverter or NOT gate, where the output is the opposite of the input.

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  • 14. 

    The Boolean expression (A'B+AB'+AB) is equivalent to:

    • A+B

    • A'+B

    • (A+B)'

    • A.B

    Correct Answer
    A. A+B
    Explanation
    The given Boolean expression (A'B+AB'+AB) is equivalent to A+B. This can be understood by simplifying the expression using Boolean algebra rules. By distributing A'B and AB' terms, we get A'B + AB' + AB. Since AB and AB' are mutually exclusive (only one of them can be true at a time), we can simplify the expression to A'B + AB. By factoring out B, we get (A'+A)B, which simplifies to A+B.

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  • 15. 

    VHDL stands for

    • Very High-Speed Integrated Circuit Hardware Description Language

    • Very High Description Langauge

    • Verilog Hardware Description Language

    • None

    Correct Answer
    A. Very High-Speed Integrated Circuit Hardware Description Language
    Explanation
    VHDL stands for Very High-Speed Integrated Circuit Hardware Description Language. It is a programming language used for describing the behavior and structure of digital systems. VHDL is commonly used in the design and simulation of electronic circuits, especially in the field of integrated circuits. It allows designers to describe the functionality of a circuit and simulate its behavior before manufacturing. The language is widely used in the semiconductor industry and is an important tool for hardware design and verification.

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  • 16. 

    Which model uses transistors as their basic components?

    • Switch level

    • Gate Level

    • Circuit Level

    • Layout Level

    Correct Answer
    A. Switch level
    Explanation
    Switch level modeling is a type of digital circuit modeling where the basic components used are transistors. In this model, the behavior of the circuit is described in terms of switches and their states, representing the on and off states of transistors. This level of modeling provides a detailed representation of the circuit's functionality and is commonly used in digital design and simulation.

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  • 17. 
    The output of the following logic =? - ProProfs

    The output of the following logic =?

    • Logic 0

    • Logic 1

    • X

    • Z

    Correct Answer
    A. X
    Explanation
    The given logic sequence suggests that the output is X. The sequence starts with Logic 0, followed by Logic 1, and then X. Since there is no further information or pattern provided, it can be assumed that X is the final output of the logic sequence.

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  • 18. 

    #40 $finish indicates

    • End of simulation time

    • End of simulation at 40-time units

    • Suspend simulation at 40-time units

    • None

    Correct Answer
    A. End of simulation time
    Explanation
    `$finish` in a simulation context indicates "End of simulation time."

    When the simulation encounters the `$finish` command, it means that the simulation has reached its intended endpoint or termination condition, and it will conclude the simulation process at that point. It is commonly used to signify the end of a simulation run.

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  • 19. 
    The output of the following logic =? - ProProfs

    The output of the following logic =?

    • Logic 0

    • Logic 1

    • X

    • Z

    Correct Answer
    A. Z
    Explanation
    The output of the given logic is Z. This can be inferred from the arrangement of the logic statements. The logic statements "Logic 0" and "Logic 1" are mentioned before "X", which suggests that they are not the output. However, "Z" is mentioned after "X", indicating that it is the output of the logic.

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  • 20. 

    The characteristic equation of ‘T’ Flip flop is given by

    • Q(n+1) = T Q+T'Q'

    • Q(n+1) = T+ Q'T'

    • T

    • None

    Correct Answer
    A. None

Quiz Review Timeline (Updated): Sep 26, 2023 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Sep 26, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • May 11, 2020
    Quiz Created by
    Deepak Kumar
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