Matrix

Ask users to choose a value from same columns for one or several rows - Matrix question 

                        

    
        Survey.StylesManager.applyTheme("default");
    


var json = {questions: [
{ type: "matrix", name: "Quality", title: "Please indicate if you agree or disagree with the following statements",
   columns: [{ value: 1, text: "Strongly Disagree" }, 
              { value: 2, text: "Disagree" }, 
              { value: 3, text: "Neutral" }, 
              { value: 4, text: "Agree" }, 
              { value: 5, text: "Strongly Agree" }],
    rows: [{ value: "affordable", text: "Product is affordable" }, 
           { value: "does what it claims", text: "Product does what it claims" },
           { value: "better then others", text: "Product is better than other products on the market" }, 
           { value: "easy to use", text: "Product is easy to use" }]}
]};

window.survey = new Survey.Model(json);


    survey.onComplete.add(function(result) {
        document.querySelector('#surveyResult').textContent =
            "Result JSON:\n" + JSON.stringify(result.data, null, 3);
    });


survey.render("surveyElement");

;
                    
<!DOCTYPE html>
<html>
<head>
    <title>Ask users to choose a value from same columns for one or several rows - Matrix question, Knockoutjs Survey Library Example</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.4.0/knockout-min.js"></script>
<script src="https://surveyjs.azureedge.net/1.0.92/survey.ko.js"></script>
<link href="https://surveyjs.azureedge.net/1.0.92/survey.css" type="text/css" rel="stylesheet" />
    <link rel="stylesheet" href="./index.css">

</head>
<body>
                <div id="surveyElement">
            </div>
    <div id="surveyResult"></div>

<script type="text/javascript" src="./index.js"></script>

</body>
</html>

Require answer for all rows (default is false). 

var q = survey.getQuestionByName('questionname'); 
q.isAllRowRequired = yourValue;
survey.render();