SystemVerilog Question & Answers December 12, 2025 By WatElectronics This Article lists 100+ SystemVerilog MCQs for engineering students. All the SystemVerilog Questions & Answers given below include a solution and link wherever possible to the relevant topic. SystemVerilog has emerged as one of the most powerful Hardware Description and Verification Languages (HDVL), widely adopted in modern semiconductor and ASIC/FPGA design workflows. It extends Verilog with advanced verification constructs, object-oriented programming, constrained random stimulus generation, assertions, coverage features, interfaces, and more—making it a preferred choice in UVM-based verification environments. This collection of 100 Multiple-Choice Questions (MCQ) is carefully designed to help students, verification engineers, and professionals evaluate and strengthen their understanding of SystemVerilog concepts. The questions range from fundamental syntax and data types to advanced verification methodologies, assertions, classes, constraints, coverage, interfacing, and real-world design scenarios. Hints and explanations are provided to ensure conceptual clarity and help learners revise quickly and effectively. 1). SystemVerilog is an extension of which language? C Verilog VHDL Pascal None Hint 2). Which of the following is a 2-state data type? reg bit logic wire None Hint 3). Which data type supports 4-state logic? bit logic shortint int None Hint 4). Size of int in SystemVerilog? 8-bit 16-bit 32-bit 64-bit None Hint 5). Which type represents real numbers? real int time byte None Hint 6). Which syntax defines a fixed-size array? [] {} () None Hint 7). byte is? signed 8-bit unsigned 8-bit signed 4-bit unsigned 4-bit None Hint 8). Which allows 2-state and 4-state operations? logic int bit shortint None Hint 9). logic replaces commonly which Verilog keyword? reg wire xreal integer None Hint 10). time data type width is 32 bits 48 bits 64 bits 128 bits None Hint 11). Case equality operator is? == != === = None Hint 12). Combinational logic block? always_ff always_comb always_latch initial None Hint 13). Sequential logic recommended block? always always_comb always_ff assign None Hint 14). unique case ensures? No default required Exactly one case executes Priority execution Skip unmatched None Hint 15). always_latch infers? FF Latch Combinational logic Tri-state None Hint 16). Non-blocking assignment operator? = <= := => None Hint 18). always_comb sensitivity is? none manual automatic event-onlyC) a None Hint 19). Concatenation operator? {} [] () None Hint 20). Replication syntax? {a,b} {3{a}} [3(a)] 3{a} None Hint 21). Default value of an uninitialized logic variable is? 0 1 X Z None Hint 22). Which feature in SystemVerilog supports Object-Oriented Programming? Functions only Classes Modules Interfaces None Hint 23). Which keyword is used to create a class object? new create malloc make None Hint 24). Which allows randomization in SystemVerilog? static rand const assign None Hint 25). Randomization with constraints uses keyword? limit constraint restrict only None Hint SystemVerilog MCQs for Exams 26). assert is used for? Randomization Hardware implementation Design verification Delay control None Hint 27). Covergroups are mainly used for? Timing analysis Coverage measurement RTL synthesis Reset logic None Hint 28). A virtual interface is used to? Replace physical connections Connect classes to interfaces Increase delay Improve synthesis None Hint 29). Associative array indexing can be? int only string only any data type constant only None Hint 30). Dynamic arrays require? Compile time size Run-time size allocation No size Constant size None Hint 31). Queue in SystemVerilog uses? () [] {} $ None Hint 32). To push an element to queue front? push_front() push_back() insert() add() None Hint 33). Which generates a delay in simulation? # @ := => None Hint 34). Event trigger operator? None 35). The fork-join block executes statements? Sequentially Randomly In parallel Not executed None Hint 36). Which fork type waits until all threads finish? join_none join_any join join_half None Hint 37). join_any ends when? All threads end Any one thread ends No thread ends Default thread ends None Hint 38). $display prints output? On waveform On console To RAM To ROM None Hint 39. $monitor prints? One-time output Changes only No output Output in file only None Hint 40. $finish does what? Pause simulation Stop simulation completely Restart simulation Write logs None Hint 41). Which SystemVerilog construct is used to create constrained random variables? always_comb constraint generate typedef None Hint 42). What is the default logic system used in SystemVerilog variables like logic? 2-state Real-number only 4-state (0,1,X,Z) None None Hint 43). Which method randomizes class objects in SystemVerilog? run() drive() randomize() fork() None Hint 44). Which loop is used for event-driven repetition? forever for repeat do-while None Hint 45). Which SystemVerilog feature supports interface-based modular design? Program Block Interfaces Coverpoints DPI None Hint 46). A covergroup is used mainly for? Synthesizing hardware Functional coverage Randomization Signal assignment None Hint 47). unique case ensures? Multiple branches can execute Only one matching branch exists Case is ignored All branches execute None Hint 48). Which data type is used for high-range integers? shortint int longint byte None Hint 49). Which feature binds interfaces to modules? modport coverpoint enum constraint None Hint 50). Which keyword is used to define a structure? struct packet bundle class None Hint SystemVerilog MCQs for Quiz 51). What does $display do? Drives signal Schedules task Prints output Stores waveform None Hint 52). Which block executes only once at the start? always_comb initial always_ff generate None Hint 53). What is the role of mailbox? Memory allocation Synchronization and message passing File export Delay generation None Hint 54). A virtual interface is used when? Connecting hardware pins Passing interface handle inside class Creating registers Defining FSM None Hint 55). Which construct defines a finite state machine cleanly? covergroup enum parameter byte None Hint 56). Which feature allows mixed C and SystemVerilog execution? DPI fork-join mailbox sequence None Hint 57). What is the purpose of $urandom? File parsing Random number generation Coverage report Compile configuration None Hint 58). Which block is recommended for combinational logic? always always_comb initial forever None Hint 59). SystemVerilog queue supports? Constant fixed size Dynamic push & pop Only FIFO No indexing None Hint 60). Which enables event-based thread synchronization? semaphore coverpoint program bit None Hint 61). Which construct is used to group signals and procedural code together? modport interface class package None Hint 62). Which assignment type schedules updates in the next simulation cycle? Blocking (=) Non-blocking (<=) Parameter Enum None Hint 63). What does $finish do? Stops simulation immediately Stops after executing pending events Ends time slots but continues clock Compiles only None Hint 64). Packed arrays are stored as? Bits contiguous in memory Dynamic memory only Random order Index-free structure None Hint 65). Virtual class means? Cannot be extended Can be instantiated directly Only serves as a base class Works as data type only A None Hint 66). A coverpoint belongs to? covergroup semaphore package module None Hint 67). Assertion type for sequential property? assert assume cover property None Hint 68). fork-join executes? Sequential threads Clock-only tasks Parallel threads File I/O only None Hint 69). DPI stands for? Data Port Interface Direct Programming Interface Digital Processor Inference Dual Port Integration None Hint 70. $dumpvars is used for? Driving signals Waveform logging Randomization Assertions None Hint 71). always_ff is mainly for? Combinational logic Sequential logic (clock/edge) Testbench only Coverage None Hint 72). Associative arrays index with? Only integers String or arbitrary type Fixed range only No index None Hint 73). $time returns? CPU time Current simulation time Execution cycles only Compiler timestamp None Hint 74). A sequence is used for? Randomization control Assertion temporal patterns Memory allocation Interface binding None Hint 75). A randc variable? Generates repeated random cycle first Cycles through all values before repeating Never repeats Is not random None Hint SystemVerilog MCQs for Interviews 76). typedef keyword is used to? Create class only Rename or define new data type Delete memory End simulation None Hint 77). Which memory type grows/shrinks at runtime? Static array Queue Parameter Enum None Hint 78). Coverage closure means? Simulation stops All features tested adequately No more testbench needed Assertions disabled None Hint 79). inside is used in? Coverage only Constraint expressions Clock division DPI only None Hint 80). $display("",a) prints? Binary Hex Decimal Real None Hint 81). Which supports object-oriented inheritance? module class interface covergroup None Hint 82). SVA stands for? SystemVerilog Architecture SystemVerilog Assertions Sequential Verification Analysis Simulation Vector Automation None Hint 83). local keyword restricts? Variable to single file Visibility inside class only Access inside module only DPI access None Hint 84). $fatal vs $finish? Both same $fatal stops immediately $finish stops immediately Both continue None Hint 85). Which allows automatic sensitivity list update? always_ff always_comb initial fork None Hint 86). Modports define? Interface parameterization Driver/monitor direction rules Clock skew Random constraints None Hint 87). What does $readmemh do? Reads hex file into memory Dumps waveform Generates coverage Symbol resolution None Hint 88). constraint_mode(0) does? Freezes variables Disables constraint Deletes class Enables constraint None Hint 89). Blocking assignment = executes? Parallel Sequentially (one after other) After delay Random order None Hint 90). Which array has user-defined keys? Static Dynamic Associative Queue None Hint 91). What is coverpoint cp; used for? Assertion binding Coverage measurement of signals Random seed reset Memory mapping None Hint 92). priority case ensures? irst match executes All matches execute No branch executes Random execution None Hint 93). $cast is used for? Data type conversion Coverage report Assertion disable File writing None Hint 94). DPI-C export uses keyword? extern import export define None Hint 95). soft constraint means? Hard mandatory rule Weak constraint overridden by stronger Illegal constraint Temporary only None Hint 96). rand keyword makes? Constant variable Random variable Static variable Compile-time constant None Hint 97). uvm_object belongs to? RTL coding UVM base class library FPGA flow only VHDL None Hint 98). What does $random return? 32-bit signed random 8-bit random Always deterministic D) No random None Hint 99). Which keyword prevents further extension? irtual final local extern None Hint None 100). OOP polymorphism occurs mainly through? tasks functions virtual methods modules None Hint SystemVerilog MCQs for Engineering Students 101). enum logic[2:0] state; creates? 3-state logic 8 possible values Unusable type No range None Hint 102). Which keyword binds assertion to module? bind link attach export None Hint 103). cover statement checks? 3-state logic 8 possible values Unusable type No range None Hint 104). Static variable scope? Class only Retains value across calls Temporary Dynamic allocated None Hint 105). Dist operator in constraints? Avoids values Gives weighted random distribution Ignores soft rules Priority selection None Hint 106). $clog2(N) returns? log10 Ceiling log base-2 Natural log Always 1 None Hint 107). Which data type is synthesizable? class semaphore logic mailbox None Hint 108). unique0 case ensures? At least one branch Allows none but checks overlaps All execute Random branch chosen Answer: B None Hint 109). $monitor prints? Once only On any value change Delayed None None Hint 110). UVM stands for? Universal Verification Methodology Unified VLSI Model Utility Verification Module Universal Virtual Memory None Hint 111). 91. final block executes? At simulation end At start On reset Never None Hint 112). Parameter override using module instance is with? #() () only {} None Hint 113). $value$plusargs reads? Random nums Command-line arguments Memory dump DPI ports Answer: B None Hint 114). assume constraint used in? nvironment guarantees RTL only Hard logic mapping DPI None Hint 115). break exits? Whole simulation Current loop Time block Fork thread None Hint 116). Class factory in SV is enabled using? new() type_id::create() build() fork None Hint 117). Constraint inheritance means? Must rewrite Child extends or overrides parent rules Constraints disabled No use None Hint 118). Coverage bins represent? Unused RTL Specific hit conditions Random cycles Waveform style None Hint 119). $fell(signal) detects? Low to high High to low No edge Glitch only None Hint 120). assert property(p) means? Never check p Check behavior of p Randomize p log p only None Hint Time's up
