All road signs
IS1aDirection sign for approach to a motorway (straight ahead, left or right)
IS1bDirection sign for approach to a motorway (straight ahead, left or right)
IS1cDirection sign for approach to a motorway (straight ahead, left or right)
IS1dDirection sign before a motorway slip road (straight ahead, left or right)
IS1fDirection sign before a motorway slip road (straight ahead, left or right)

IS1eInformative sign
IS1e Direction sign before a motorway slip road (straight ahead, left or right)
Direction signs marking the direction of the motorway slip road, its destination or destinations, and its number.
In Czech
The exam is in Czech, so it is worth knowing the Czech name. Below is the official text from Czech law, which is not translated.
Směrová tabule před nájezdem na dálnici (přímo, vlevo nebo vpravo)
Značky vyznačují směr nájezdu na dálnici, její cíl (cíle) a číslo. Trasa za dopravní značkou již vede jen na těleso dálnice.
Příloha č. 5 k vyhlášce č. 294/2015 Sb., ve znění vyhlášky č. 205/2025 Sb.
Similar signs
IS1aDirection sign for approach to a motorway (straight ahead, left or right)
IS1bDirection sign for approach to a motorway (straight ahead, left or right)
IS1cDirection sign for approach to a motorway (straight ahead, left or right)
IS1dDirection sign before a motorway slip road (straight ahead, left or right)
IS1fDirection sign before a motorway slip road (straight ahead, left or right)