Example of global variables

global_var.js

var updateQuestionStatus = function (student, logInfo, test, sessionId, status, confidence, timeTaken, earned, possible) {
    // Question gets scoped as a global variable because there is no 'var' statment. Therefore it will never get cleaned up
    // by the garbage collector.
    question = test.getSession(sessionId);

    logInfo.testId = test.id;

    if (question) {
        question.status = status;
        question.confidence = confidence;
        question.timeTaken = timeTaken;
        question.earned = earned;

        // something up with the possible values sometimes
        if (possible && possible > 0) {
            question.possible = possible;
        } else {
            question.possible = 1;
        }

        student.safeSave()
            .then(function () {
                logInfo.msg = 'update successful';
                log.info(logInfo);
                deferred.resolve(student);
            }, function (error) {
                logInfo.msg = error;
                log.error(logInfo);
                deferred.reject(error);
            });
    } else {

        logInfo.msg = 'no question matching the id ' + sessionId + ' could be located';
        log.info(logInfo);
        deferred.reject(logInfo.msg);
    }
}