protected $productRepository;
protected $stockRegistry;

public function __construct(
    ...
    MagentoCatalogModelProductRepository $productRepository,
    MagentoCatalogInventoryApiStockRegistryInterface $stockRegistry,
    ...
)
{
    $this->productRepository = $productRepository;
    $this->stockRegistry = $stockRegistry;
}

$outOfStockProducts = array(1, 3, 4, 5, 9);
    $inStockProducts = array(2, 6, 7, 8, 10);

    //For out of stock products
    foreach($outOfStockProducts as $k=>$id){
        $product = $this->productRepository->getById($id);
        $stockItem = $this->stockRegistry->getStockItemBySku($product->getSku());
        $stockItem->setQty(0);
        $this->stockRegistry->updateStockItemBySku($product->getSku(), $stockItem);
    }

    //For 100 stock products
    foreach($inStockProducts as $k=>$id){
        $product = $this->productRepository->getById($id);
        $stockItem = $this->stockRegistry->getStockItemBySku($product->getSku());
        $stockItem->setQty(100);
        $this->stockRegistry->updateStockItemBySku($product->getSku(), $stockItem);
    }

$objectManager = MagentoFrameworkAppObjectManager::getInstance();
$productRepository = $objectManager->create('MagentoCatalogModelProductRepository');
$stockRegistry = $objectManager->create('MagentoCatalogInventoryApiStockRegistryInterface');

    $outOfStockProducts = array(1, 3, 4, 5, 9);
    $inStockProducts = array(2, 6, 7, 8, 10);

    //For out of stock products
    foreach($outOfStockProducts as $k=>$id){
        $product = $productRepository->getById($id);
        $stockItem = $stockRegistry->getStockItemBySku($product->getSku());
        $stockItem->setQty(0);
        $stockRegistry->updateStockItemBySku($product->getSku(), $stockItem);
    }

    //For 100 stock products
    foreach($inStockProducts as $k=>$id){
        $product = $productRepository->getById($id);
        $stockItem = $stockRegistry->getStockItemBySku($product->getSku());
        $stockItem->setQty(100);
        $stockRegistry->updateStockItemBySku($product->getSku(), $stockItem);
    }

UPDATE cataloginventory_stock_item set qty=100 where product_id IN(2, 6, 7, 8, 10);
UPDATE cataloginventory_stock_status SET qty=100 AND stock_status=1 WHERE product_id IN(2, 6, 7, 8, 10);


UPDATE cataloginventory_stock_item set qty=0 where product_id IN(2, 6, 7, 8, 10);
UPDATE cataloginventory_stock_status SET qty=0 AND stock_status=0 WHERE product_id IN(2, 6, 7, 8, 10);