<form>
<section class="form-block">
<label>Memory</label>
<div class="form-group">
<label class="required">Space</label>
<label for="validInput1" aria-haspopup="true" role="tooltip" class="tooltip tooltip-validation invalid tooltip-sm">
<input type="text" id="validInput1">
<span class="tooltip-content">
This field cannot be empty!
</span>
</label>
<div class="select">
<select id="exampleSelect1">
<option>MB</option>
<option>GB</option>
<option>TB</option>
</select>
</div>
</div>
</section>
<section class="form-block">
<label>Hard Disk</label>
<div class="form-group">
<label class="required">Space</label>
<label for="validInput2" aria-haspopup="true" role="tooltip" class="tooltip tooltip-validation invalid tooltip-md">
<input type="text" id="validInput2">
<span class="tooltip-content">
This field cannot be empty!
</span>
</label>
<div class="select">
<select id="exampleSelect1">
<option>MB</option>
<option>GB</option>
<option>TB</option>
</select>
</div>
</div>
</section>
<button type="submit" class="btn btn-primary">Ok</button>
<button type="submit" class="btn btn-secondary">Cancel</button>
</form>