WAIT Statements MCQ

Test your knowledge with important WAIT Statements MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more WAIT Statements MCQs at Bissoy

• Which of the following can be used to make the process wait indefinitely?
  ক

  WAIT FOR indefinite ns;

  খ

  WAIT UNTIL false;

  গ

  WAIT;

  ঘ

  WAIT UNTIL true;
• Since WAIT statement can’t be synthesized many times, how a clock event can be detected then?
  ক

  By using IF(clk = ‘1’)

  খ

  By using ‘EVENT keyword

  গ

  By using a CASE statement

  ঘ

  By using a LOOP
• A user wants to assign a signal after a wait of 20 ns. The process used has a sensitivity list. What is the possible way to achieve this?
  ক

  By using WAIT FOR statement

  খ

  By using AFTER clause

  গ

  By using a separate process

  ঘ

  By using WAIT ON statement
• WAIT FOR statement is useful only for _________
  ক

  Synthesis

  খ

  Simulation

  গ

  Gate level implementation

  ঘ

  Optimization
• In a procedure, __________ statement is not supported.
  ক

  WAIT UNTIL

  খ

  WAIT ON

  গ

  WAIT FOR

  ঘ

  WAIT FOR and unconditional WAIT
• Which of the following is true about WAIT ON statement?
  ক

  WAIT ON statement is supported by synthesis tools

  খ

  WAIT ON statement is not supported by synthesis tools

  গ

  WAIT ON statement is supported in a clocked process only

  ঘ

  WAIT ON statement is supported in a combinational process
• Which of the following is true about WAIT UNTIL statement?
  ক

  WAIT UNTIL statement is supported by synthesis tools

  খ

  WAIT UNTIL statement is not supported by synthesis tools

  গ

  WAIT UNTIL statement is supported in a clocked process only

  ঘ

  WAIT UNTIL statement is supported in a combinational process
• In a procedure is called from a process having a sensitivity list, how many wait statements one can use?
  ক

  3

  খ

  2

  গ

  1

  ঘ

  0
• In combinational logic, how many WAIT statements can be used?
  ক

  0

  খ

  1

  গ

  2

  ঘ

  3
• In case of sensitivity list the process suspends at the end of the process and in WAIT statement it suspends ____________
  ক

  At the beginning

  খ

  At the end

  গ

  At the beginning of architecture

  ঘ

  Where the WAIT statement is encountered
• What is the deadlock condition in VHDL?
  ক

  When WAIT statement keeps on waiting forever

  খ

  When WAIT UNTIL statement uses more than one signal

  গ

  When WAIT ON statement has only one signal

  ঘ

  When WAIT FOR statement doesn’t have any time clause
• Which of the following WAIT statement is most useful for implementing a synchronous sequential circuit?
  ক

  WAIT ON

  খ

  WAIT FOR

  গ

  WAIT UNTIL

  ঘ

  WAIT TIME
• WAIT statement provides more flexibility than sensitivity list.
  ক

  True

  খ

  False
• Given that a process has no sensitivity list and has only one WAIT statement which is WAIT FOR statement. How many signals are there to which process is sensitive?
  ক

  0

  খ

  1

  গ

  2

  ঘ

  Can’t be determined
• Which of the following statement uses only 1 signal?
  ক

  WAIT FOR

  খ

  WAIT UNTIL

  গ

  WAIT ON

  ঘ

  WAIT UNTIL and WAIT FOR
• Which of the following is correct syntax for WAIT ON statement?
  ক

  WAIT ON signal_assignments;

  খ

  WAIT ON boolean_condition;

  গ

  WAIT ON signal_list;

  ঘ

  WAIT ON time_expression;
• Which of the following is the correct use of WAIT ON statement?
  ক

  To stop execution until a signal changes its value

  খ

  To stop execution when a signal changes its value

  গ

  To stop execution when a condition specified is true

  ঘ

  To stop execution when a condition specified is false
• How to define a WAIT FOR statement?
  ক

  WAIT FOR signal_name;

  খ

  WAIT FOR booelan_expression;

  গ

  WAIT FOR clock_event;

  ঘ

  WAIT FOR time_value;
• What is the use of WAIT FOR statement?
  ক

  To stop execution when the condition is false

  খ

  To stop execution until a signal changes its value

  গ

  To stop execution for a specific time period

  ঘ

  To stop execution until the clock event occurs
• What is the correct syntax for using a WAIT UNTIL statement?
  ক

  WAIT UNTIL boolean_condition_or_expression;

  খ

  WAIT UNTIL signal_name;

  গ

  WAIT UNTIL time_value_or_expression;

  ঘ

  WAIT UNTIL boolean_expression time_value;
• WAIT UNTIL statements cause the process to wait ________
  ক

  When a signal changes value

  খ

  Until a condition is true

  গ

  For a specific time period

  ঘ

  When either a signal changes its value or a condition comes true
• Which of the following is not the correct WAIT statement?
  ক

  WAIT ON

  খ

  WAIT WHILE

  গ

  WAIT FOR

  ঘ

  WAIT UNTIL
• How many forms of WAIT statement are there in VHDL?
  ক

  1

  খ

  2

  গ

  3

  ঘ

  4
• Which of the following can’t be used in a process when it has any WAIT statement?
  ক

  IF

  খ

  CASE

  গ

  LOOP

  ঘ

  Sensitivity list
• WAIT statement can’t appear under _______ directly.
  ক

  Architecture

  খ

  Process

  গ

  Procedure

  ঘ

  Subprogram