Testbench entity (no ports) in VHDL - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a testbench entity with no ports.

VHDL

entity tb_example is
  [1]
end tb_example;

Drag options to blanks, or click blank then click option'

Aport map();

Bbegin

Cis

Dport();

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting the port declaration entirely.

Using 'port map()' inside the entity declaration.

The testbench entity has no ports, so we declare an empty port list with port();.

2fill in blank

medium

Complete the code to start the architecture body for the testbench.

VHDL

architecture behavior of tb_example is
  [1]
begin
  -- testbench code here
end behavior;

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Asignal clk : std_logic := '0';

Bentity tb_example is

Cport();

Dbegin

Attempts:

3 left

💡 Hint

Common Mistakes

Placing signal declarations after begin.

Using port() inside architecture.

Inside the architecture declaration, signals can be declared before the begin keyword.

3fill in blank

hard

Fix the error in the testbench entity declaration.

VHDL

entity tb_example is
  [1]
end tb_example;

Drag options to blanks, or click blank then click option'

Aport;

Bport();

Cport(); -- no semicolon

Dport()

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting the semicolon at the end of the port declaration.

Leaving out parentheses after 'port'.

The correct syntax for an empty port declaration includes parentheses and a semicolon: port();.

4fill in blank

hard

Fill both blanks to complete the testbench entity and architecture header.

VHDL

entity tb_example is
  [1]
end tb_example;

architecture [2] of tb_example is
begin
  -- testbench process
end [2];

Drag options to blanks, or click blank then click option'

Aport();

Bbehavior

Cstruct

Dentity

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'struct' or 'entity' as architecture names.

Forgetting to repeat the architecture name after 'end'.

The entity has an empty port list port();. The architecture name is commonly behavior.

5fill in blank

hard

Fill all three blanks to complete the testbench entity and architecture with a clock signal declaration.

VHDL

entity [1] is
  [2]
end [1];

architecture [3] of [1] is
  signal clk : std_logic := '0';
begin
  -- clock process here
end [3];

Drag options to blanks, or click blank then click option'

Atb_example

Bport();

Cbehavior

Dclk

Attempts:

3 left

💡 Hint

Common Mistakes

Mismatching entity and architecture names.

Omitting the empty port declaration.

The entity and architecture names match as tb_example and behavior. The entity has an empty port list port();.