If you mean by mob egg-type things, you can't. Only darkness can cause mobs to spawn.
YES. But you need to buy the app Minecraft Pocket Edition Invpro for $1.50 P.S don't spawn over 100 mobs. You will regret it P.P.S I have 100 sheep in a pit P.P.P.S Awesome app
No, mobs will not spawn in water or ontop of half slabs.
Sheep, Chickens, Cows, Pigs, Skeletons, Zombies, and Spiders.
In order to spawn mobs or animals in minecraft pe you need to buy the app Minecraft Pocket edition Invpro. For $1.50 you can spawn mobs, change your game from creative to survival, hack in LAVA and WATER BLOCKS, and much more! P.S. Don't spawn over 100 mobs. It will glitch your game. By: THE MINECRAFT MASTER
In Minecraft Classic, mobs can't spawn, so they can't exist naturally. If you play the Survival Test, and when mobs spawn there, you can save it and open it in creative mode so then the mobs can stay there. However, in Minecraft Creative Mode, mobs can spawn, but they can't hurt you because you have no healthbar.
No, the AI for mobs in minecraft has been improved so mobs don't spawn in strange places. You can manually spawn them in lava with that mob's egg.
no. in creative, it is all day, no mobs, flying, and unlimited resources.
The only mob that can spawn in water is currently a squid.
All hostile mobs spawn on easy difficulty.
Grass and stone blocks.
No, Its only for Xbox and PC Currently the only mobs available are Sheep, Chickens, Cows, Pigs, and Zombies.
Yes, in the Nether Zombie Pigmen spawn on the netherrack but I don't think they spawn on Netherrack in the Overworld.