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VHDL Question & Answers

July 25, 2022 By WatElectronics

This article lists 75 VHDL MCQs for Engineering Students. The VHDL Questions & Answers below include solutions and links to the relevant topic. This is helpful for users who are preparing for their exams and interviews, or professionals who would like to brush up on the fundamentals of the VHDL.

The signals, constants, variables, and files are the VHDL data objects. The data object signal is used to hold the list of values that includes current values and future values, so there is a requirement of defining a signal so the signal data object can be used directly while coding the program. 

If we want to store any value that is a constant value that will not change then with the use of a continuous VHDL data object we can assign any value to a variable, it will not change its value while simulation the program. The VHDL is one type of language used in digital circuits designs.

The variable is one of the VHDL data objects, it holds any value while simulation a program then we can define the variables inside the program to get the final result directly. It will not change its value; it is just used to hold the value of a number that uses the variable.   

The structure of VHDL consists of package, entity, architecture, and configuration. The concurrent or dataflow, behavioral, and structural modeling are the styles of modeling in VHDL. The behavioral modeling statement consists of sequential program statements, the dataflow modeling statement consists of concurrent statements, and the structural modeling is a set of interconnecting components.  

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1). Which one of the following is a VHDL logical (Boolean) operator?

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2). Which one of the following is a VHDL shift operator?

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3). What is the use of VHDL language?

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4). How many units does VHDL design consists?

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5). The simple index: integer: =0 is an example declaration of _______________ data type provided within VHDL?

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6). Which one of the following is a type of scalar literal?

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7). In which one of the following, the user defined data types are allowed?

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8). In which one of the following, the modulo operator is present?

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9). In which one of the following, the unary reduction operator is not present?

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10). Which one of the following is a VHDL relational operator?

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11). What is the standard form of SLA?

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12). Which one of the following, one manages the large design?

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13). Which one of the following supports multidimensional arrays?

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14). Which one of the following allows concurrent procedure calls?

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15). Which one of the following modelling statements consists of sequential program statement?

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16). Which one of the following modellings requires truth table for design?

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17). Which one of the following represents behaviour modelling?

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18). Which one of the following modelling consists gate level abstraction?

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19). The variable Val: real: =1.0 is an example declaration of ______ data type provided within VHDL?

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20). Which one of the following operators is a type of numerical operator?

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VHDL MCQs for Exams

21). What is the standard form of SLL?

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22). Which one of the following VHDL design unit used to define external view of a model?

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23). The concurrent signal assignments are categorized into ________ types?

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24). Which one of the following modelling statements consists of concurrent statements?

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25). Which one of the following modelling requires logical diagram for design?

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26). What is the abbreviation of std_ulogic?

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27). The length of O "126" bit string is ______?

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28). Which one of the following types comes under fixed point type?

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29). Which one of the calls are used in the Verilog program?

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30). What is the standard form of SRL?

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31). The variable test: Boolean: =True is an example declaration of ________________ data type provided within VHDL?

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32). What is the abbreviation of std_ulogic_vector?

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33). Which one of the following type comes under standard logic type?

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34). Which one of the calls are used in the VHDL program?

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35). Which of the following codes are simplified by using procedures?

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36). How many object types are there in very high speed integrated circut?

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37). How many modes are there for the ports in the VHDL language?

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38). Which one of the following object types require less memory?

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39). What is the name of the Lmask instruction?

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40). What is the standard form of SRA?

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41). Which one of the following VHDL design unit is used to define the function of the model?

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42). The variable term: character: ='@' is a _____?

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43). Which one of the following is a type of array type literal?

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44). In which one of the following, the user defined data types are not allowed?

Hint
45). Which one of the following is a set of interconnect component?

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46). Which one of the following modelling requires Boolean expression for design?

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47). What is the abbreviation of Std_Logic?

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48). The length of X "56" bit string is ______?

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49). Which of the following codes are simplified by using tasks?

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50). What is the standard form of VHSIC?

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VHDL MCQs for Students

51). Which one of the following VHDL design unit used to associate an architecture with an entity?

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52). The signal in 1: bit: ='0' is a _____?

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53). What is the standard form of MVLS?

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54). Which one of the following one doesn't manage the large design?

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55). What is the abbreviation of Std_Logic_Vector?

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56). What is the name of the LXOR instruction?

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57). The shift operators in VHDL are categorized into ______ types?

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58). Which one of the following, one doesn't return any value?

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59). What is the name of the instruction Divq?

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60). What is the standard form of HDL?

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VHDL MCQs for Quiz

61). The variable delay: time: =25ns is an ________?

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62). Which one of the following one returns the value?

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63). What is the name of the instruction Bi-ivnz?

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64). The figure shown below is a block diagram of ____________________?

Schematic Diagram of VHDL Modules

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65). What is the name of the instruction Br-ivnz?

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66). Which one of the following called as glass box modelling?

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67). Which one of the following describes behaviour of the circuit within a process?

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68). What is the name of the instruction Biq-ivnz?

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69). What is the name of the LOR instruction?

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70). What is the standard form of RTL?

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71). What is the abbreviation of integer_vector?

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72). The length of B "1010110" bit string is ______?

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73). What is the name of the instruction Brq-ivnz?

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74). Which one of the following called as black box modelling?

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75). Which one of the following describes how data flows from input to output?

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For More MCQs

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