"What is your expertise?" is correct. "Expertise" means the complete collection of a person's special skills and as such agrees with singular verbs. A sentence with the same meaning but a plural verb would be "What are your expert skills?"
Although she had a stellar resume, he decided to hire someone else for the job, but he was impressed with her experience and skills.
In this context, "rusty" is an adjective describing the condition of your skills. Adjectives are used to describe or modify nouns or pronouns, while adverbs typically modify verbs, adjectives, or other adverbs.
The astute detective quickly solved the complex case using her keen observation skills.
She practiced every day to hone her skills as a violinist.
The objective of the examination is to provide reasonable assurance to the boards that candidates passing the examination have the level of technical knowledge, skills, and abilities necessary to protect the public interest.
communication skills
"skills" is the subject of this sentence. "Communication " modifies the subject.
Example sentence is: I use my tactical skills when I play tennis.
It refers to your skill in structuring a comprehensive sentence
We should emphasize on improving our verbals skills. This is a sentence containing emphasize.
I have better organization skills then you
you have poor communication skills
her transferable skills from her old job made her the team leader
Mrs. Claus has some mad cookie baking skills.
Systematic practice of inspection, palpation, percussion and auscultation is required as instructed by medical teacher and in Hutchison's manual of Clinical Examination. A mind that doesn't know can't see so you have to know what to look for in physical examination.
If an employee does not have the necessary skills or the job they are doing, they are incompetent in that career.