1.what is the unit of complexity? 2. diff b/w order $ degree of a tree ? 3. diff b/w multiprogramming $ multiprocessor os. 4. in single processor how is the multiprogramming performed wen a job is performing i/o operation . is cpu not requrired for i/o operations. 5.plzzz help me out wid the solutions of coreman, esp of B-trees. 6. ADOBE is cmning to my cllg plzz help out in how $ 4rm where to prepare for it esp. C .. i'm a beginner so help me out so may well i could get a location in it next year......