Hi, some more info on Adobe Question paper-

Analytical/Quantitative - GRE book is sufficient - very low level but the time is short so you should practice.

Data Struct/OS - Binary Search Trees (isBST?, depth, node-leaf relations etc), Linked list (reverse, search the element from it's end, etc), some questions on OS. - Overall you should have good knowledge in BST and linked list.

C - swap int pointers, malloc for mxn matrix, function pointers, const pointers, typedef errors, switch() errors, #define, bitwise operators (divisble by 3), arrays (find duplicates, rotate elements from i, j etc), recursion, booleans (prove equations like A+BC = (A+B)(B+C), simplify (~A)(A+B)+(AA+B)(~B)), postorder, preorder. overall the question paper was tough you have to practice a lot before the test.