diff --git a/src/ExamService/ExamService.php b/src/ExamService/ExamService.php
index 2dca330..543091b 100644
--- a/src/ExamService/ExamService.php
+++ b/src/ExamService/ExamService.php
@@ -5,7 +5,7 @@ declare(strict_types=1);
 namespace Dhd\Micro\Interface\ExamService;
 
 /**
- * 试题中心聚合契约（管理后台使用范围）
+ * 试题中心聚合契约
  */
 interface ExamService extends
     CustomQuestionInterface,
@@ -50,27 +50,57 @@ interface ExamService extends
     public function submitPractice(int $userId, int $paperId, array $answers): array;
 
     /**
-     * 开始考试（V1 兼容接口）.
+     * 开始考试.
      */
     public function startExam(array $params): array;
 
     /**
-     * 提交考试（V1 兼容接口）.
+     * 提交考试.
      */
     public function submitExam(array $params): array;
 
     /**
-     * 获取用户考试记录列表（V1 兼容接口）.
+     * 获取用户考试记录列表.
      */
     public function getUserExamRecords(array $params): array;
 
     /**
-     * 获取考试记录详情（V1 兼容接口）.
+     * 获取考试记录详情.
      */
     public function getExamRecordDetail(int $recordId, int $userId): array;
 
     /**
-     * 获取考试记录题目列表（V1 兼容接口）.
+     * 获取考试记录题目列表.
      */
     public function getByRecordId(int $userId, int $recordId): array;
+
+    /**
+     * 保存用户答题记录.
+     */
+    public function saveAnswer(array $params): bool;
+
+    /**
+     * 获取用户错题列表.
+     */
+    public function getUserWrongQuestions(array $params): array;
+
+    /**
+     * 标记错题为已掌握.
+     */
+    public function markAsMastered(int $userId, int $wrongId): bool;
+
+    /**
+     * 添加错题笔记（避免与题目笔记 addNote 重名）.
+     */
+    public function addWrongQuestionNote(array $params): bool;
+
+    /**
+     * 获取题目错误统计.
+     */
+    public function getErrorStats(int $userId, int $questionId): array;
+
+    /**
+     * 批量更新题目得分.
+     */
+    public function batchUpdateScores(array $params): bool;
 }