1) which variable name is correct ? a) s.num b) s_num c) 1_s_num 2) Which program exchanges the values of two variables A and B? a) program1: A=2 , B=5, A=B,B=A b) program2: A=2, B=5,  C=A,  A=B, B=A 3) -------------is located in memory of computer in order to save information, it has a name and content various throughout the execution of program a) algorithm b) variable c) program 4) The content of variable can be changed a) True b) False

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