Why is it generally a good practice to reuse an instantiated XMLHttpRequest object??
What will be an ideal response?
Opening and closing HTTP connections represent a significant bottleneck in loading a web page, increasing the amount of time it takes for a document to load. To improve performance between client requests and server responses, HTTP/1.1 automatically keeps the client-server connection open until the client or server explicitly closes it by assigning a value ofcloseto theConnectionheader. This means that you can make your Ajax programs faster by reusing an instantiatedXMLHttpRequestobject instead of re-creating it each time you send a server request.
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A technician is installing a new operating system onto a PC by booting off of the OS installation CD. This computer already has a bootable partition on the primary hard drive that will be deleted during the installation. The PC will not boot from the CD. Where should the technician look to troubleshoot this problem?
A. Hard drive setup program B. Operating system's boot settings C. BIOS D. CMOS
Answer the following statements true (T) or false (F)
1. When a check box is empty, the value of its Selected property is False. 2. After several controls of the same type have been created, they can be moved inside a group box and thereby become attached to it. 3. With a check box control, toggling the state of the small square raises the CheckChanged event. 4. Group boxes are passive objects used to group related sets of controls. 5. Programmers frequently write event procedures for the group box control.