Question 1: As given

question1.js

function getNestedObjectValue(objObject, strKey) {
    //split the key into parts
    let arrParts = strKey.split('/');

    //get array length before loop for optimisation
    let numLength = arrParts.length;

    //create variable to hold object position
    let mixValue = objObject;

    //loop through parts
    for (let numX = 0; numX < numLength; numX++) {
        let strKey = arrParts[numX];

        //ensure that key exists
        if (mixValue.hasOwnProperty(strKey)) {
            //store the new value
            mixValue = mixValue[strKey];
        } else {
            //take the first key in the object as it doesnt match the key
            mixValue = mixValue[Object.keys(mixValue)[0]];
        }
    }

    return mixValue;
}

let objData = {
    'a': {
        'b': {
            'c': 'd'
        }
    }
};


//Returns 'd'
console.log(getNestedObjectValue(objData, 'a/b/c'));

console.log(getNestedObjectValue(objData, 'x/y/z'));