But there are different levels of clearance, and what you need depends on what you will do. A top secret clearance takes about a year, and a secret clearance averages about six to eight months, he says, adding that 70 percent of jobs at the CIA require a secret clearance or above. The process includes a polygraph, psychological testing, medical evaluations, and credit and criminal background checks.
Computer programming. Computer programming (often shortened to programming) is a process that leads from an original formulation of a computing problem to executable computer programs.
The difference is that systems development life cycle is the time  it takes to fully develop and fine-tune an entire information  system. Software development life cycleâ¦ applies only to the  software development process.