Which of the following is correct regarding Aggregate functions?
Options: it takes a list of values and return a single values as result
B. it takes a list of values and return a list of values as result
C. it takes a single value and returns a list of values as result
D. it takes a single value and returns a single value as result
Options: (A)A sequential execution of a program, one statement at a time (B) Execution of a program by more than one task, with each task being able to execute the same or different statement at the same moment in time (C) A program or set of instructions that is executed by a processor. (D) None of these
Which, of the following, is true for testing and debugging?
Options: Testing checks for logical errors in the programs, while debugging is a process of correcting those errors in the program, Testing detects the syntax errors in the program while debugging corrects those errors in the program, Testing and debugging indicate the same thing, All of the above
Options: to create a place in the database for storage of scheme objects, rollback segments, and naming the data files to comprise the tablespace, to create a database trigger, to add/rename data files, to change storage, All of the above