Warlock 5e: DnD 5th Edition Class Guide
Warlock Spell Slots Are Separate: In BG3, Warlock Pact Magic uses its own spell slots and does not combine with other class spell slots.
How many spell slots does a Level 3 Warlock have in 5E? - Quora
Answer (1 of 4): I advice looking at the table in the Player Handbook or on dnd beyond.
If it is still unclear let me explain.
A warlock has all its spell slots on the same level, on level 3 the spell slots are all level 2 and they have 2 of them. You can use these level 2 spell slots for both ...
Paladin Spells - D&D 5th Edition
Character optimization guide for the DnD 5e Paladin's spell list.