How can you distinguish between a self-confident employee and a low-profile employee and not confident of himself?

A self confident employee is one who has generalized personality with respect to a specific task, ability or challenge and believes he/she can succeed or accomplish a task like(meet targets or increase sales turn out)even though they lack the sel efficacy to achieve it- (they are productive),,,believe in oneself is self confidence,

while a low profile employee/not confident employee is one who tend not to accurately believe on his/her capabilities,abilities and competency and therefore tend to underperform

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I support Christine's answer

A confident employee has the ability to achieve what is required of him professionally and has the ability to solve the obstacles that stand in front of him and provide quick solutions, unlike the employee who is not confident himself

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I will only be able to do so through the tasks I ask them to implement.

And the explanations I have been waiting for from the work being carried out.

Or commissioning a test working group.