<!DOCTYPE html>
<html>
<head>
<title>Title of the document</title>
<script src="https://code.jquery.com/jquery-3.5.0.min.js"></script>
</head>
<body>
<p><input type="checkbox" id="checkId"> Are you sure?</p>
<button type="button" class="check">Yes</button>
<button type="button" class="uncheck">No</button>
<script>
$(document).ready(function() {
$(".check").click(function() {
$("#checkId").attr("checked", true);
});
$(".uncheck").click(function() {
$("#checkId").attr("checked", false);
});
});
</script>
</body>
</html>