Please answer this question using a dictionary.
Why can't you respond to my questions?
I didn’t know how to answer when the interviewer asked me if I have ever lied before.
This word consists of kanji with hiragana attached. Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means answer so the verb version means to answer.
The reading is the kun'yomi reading as you'd expect with all the hiragana, but luckily that's the reading you learned with the kanji so you should be able to read this.