Quiz On Verilog Hdl & Digital Design
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!
Questions and Answers
- 1.
Which among the following is a process of transforming RTL to a gate-level netlist?
- A.
Simulation
- B.
Optimization
- C.
Synthesis
- D.
Verification
Correct Answer
C. SynthesisExplanation
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.Rate this question:
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- 2.
The output of the following logic =?
- A.
Logic 0
- B.
Logic 1
- C.
X
- D.
Z
Correct Answer
D. ZExplanation
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.Rate this question:
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- 3.
#40 $finish indicates
- A.
End of simulation time
- B.
End of simulation at 40-time units
- C.
Suspend simulation at 40-time units
- D.
None
Correct Answer
A. End of simulation timeExplanation
`$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.Rate this question:
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- 4.
The characteristic equation of ‘T’ Flip flop is given by
- A.
Q(n+1) = T Q+T'Q'
- B.
Q(n+1) = T+ Q'T'
- C.
T
- D.
None
Correct Answer
D. None -
- 5.
The hexadecimal number ‘A0’ has the decimal value equivalent to:
- A.
80
- B.
256
- C.
100
- D.
160
Correct Answer
D. 160Explanation
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.Rate this question:
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- 6.
The output of the following logic =?
- A.
Logic 0
- B.
Logic 1
- C.
X
- D.
Z
Correct Answer
C. XExplanation
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.Rate this question:
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- 7.
(734)8= ( )16
- A.
C1D
- B.
DC1
- C.
1CD
- D.
1DC
Correct Answer
D. 1DCExplanation
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.Rate this question:
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- 8.
The full form of VLSI is _______.
- A.
Very Long Single Integration
- B.
Very Least Scale Integration
- C.
Very Large Scale Integration
- D.
Very Long Scale Integration
Correct Answer
C. Very Large Scale IntegrationExplanation
VLSI stands for Very Large Scale Integration. This term refers to the process of integrating thousands or millions of transistors onto a single chip. It is used in the design and manufacturing of microchips and plays a crucial role in the development of advanced electronic devices. The other options provided in the question, such as Very Long Single Integration, Very Least Scale Integration, and Very Long Scale Integration, do not accurately represent the widely accepted full form of VLSI.Rate this question:
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- 9.
VHDL stands for
- A.
Very High-Speed Integrated Circuit Hardware Description Language
- B.
Very High Description Langauge
- C.
Verilog Hardware Description Language
- D.
None
Correct Answer
A. Very High-Speed Integrated Circuit Hardware Description LanguageExplanation
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.Rate this question:
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- 10.
The digital logic family which has minimum power dissipation is:
- A.
TTL
- B.
RTL
- C.
DTL
- D.
CMOS
Correct Answer
D. CMOSExplanation
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.Rate this question:
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- 11.
ASIC stands for:
- A.
Application speedy integrated circuit
- B.
​​​​​​​Application-specific integrated circuit
- C.
Advanced speed integrated circuit
- D.
Advanced standard integrated circuit
Correct Answer
B. ​​​​​​​Application-specific integrated circuitExplanation
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.Rate this question:
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- 12.
A 2-input XOR gate can be worked as an Inverter (NOT Gate) if a =? & b =?
- A.
A = a , b =0
- B.
A = a , b =1
- C.
A = b , b= a
- D.
None
Correct Answer
B. A = a , b =1Explanation
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.Rate this question:
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- 13.
Which model uses transistors as their basic components?
- A.
Switch level
- B.
Gate Level
- C.
Circuit Level
- D.
Layout Level
Correct Answer
A. Switch levelExplanation
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.Rate this question:
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- 14.
Match the following:
- A.
P – 3 Q – 2 R – 1
- B.
P – 3 Q–1 R – 2
- C.
P – 2 Q –3 R –1
- D.
None
Correct Answer
A. P – 3 Q – 2 R – 1 -
- 15.
What is the default value of the reg data type?
- A.
0
- B.
1
- C.
Z
- D.
X
Correct Answer
D. XExplanation
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.Rate this question:
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- 16.
The Gray code for decimal number 6 is equivalent to:
- A.
1100
- B.
1001
- C.
0101
- D.
0110
Correct Answer
C. 0101Explanation
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.Rate this question:
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- 17.
The Boolean expression (A'B+AB'+AB) is equivalent to:
- A.
A+B
- B.
A'+B
- C.
(A+B)'
- D.
A.B
Correct Answer
A. A+BExplanation
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.Rate this question:
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- 18.
What is the time period of clock #20 clock = ~clock?
- A.
10
- B.
20
- C.
40
- D.
50
Correct Answer
C. 40Explanation
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.Rate this question:
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- 19.
Verilog is case sensitive.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
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.Rate this question:
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- 20.
The FPGA is abbreviated as:
- A.
First programmable Gate Array
- B.
Field Programmable Gate Array
- C.
Field Post Gate Array
- D.
Field Program Gate Array
Correct Answer
B. Field Programmable Gate ArrayExplanation
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.Rate this question:
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Current Version
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Sep 26, 2023Quiz Edited by
ProProfs Editorial Team -
May 11, 2020Quiz Created by
Deepak Kumar