Let the address stored in the program counter of a computer be designated by the symbol X1. The instruction stored in location X1 had an address part X2. The operand needed to execute the instruction is stored in the memory word whose address is X3. An index register contains the value X4. What should be the relationship between the various addresses if the addressing mode of the instruction is (a) direct; (b) indirect; (c) relative; (d) indexed

Write a method named addall that could be placed inside the hashintset class. this method accepts another hashintset as a parameter and adds all elements from that set into the current set, if they are not already present. for example, if a set s1 contains [1, 2, 3] and another set s2 contains [1, 7, 3, 9], the call of s1.addall(s2); would change s1 to store [1, 2, 3, 7, 9] in some order. you are allowed to call methods on your set and/or the other set. do not modify the set passed in. this method should run in o(n) time where n is the number of elements in the parameter set passed in.

Suppose an astronomer discovers a large, spherical-shaped body orbiting the sun. the body is composed mostly of rock, and there are no other bodies sharing its orbit. what is the best way to categorize this body? a. planet b. moon c. comet d. asteroid

To produce a starlight effect in her photograph, lina should choose the filter for her camera.