This is paranoia based on long experience. After a pointer has been freed, you can no longer use the pointed-to data. The pointer is said to “dangle”; it doesn’t point at anything useful.
Sometimes you can get away with using a small memory model in most of a given program. There might be just a few things that don’t fit in your small data and code segments. When that happens, you
What is a “null pointer assignment” error? What are bus errors, memory faults, and core dumps?
These are all serious errors, symptoms of a wild pointer or subscript. Null pointer assignment is a message you might get when an MS-DOS program finishes executing. Some such programs can arrange for
No. Pointer addition and subtraction are based on advancing the pointer by a number of elements. By definition, if you have a void pointer, you don’t know what it’s pointing to, so you don’t
Screen.MousePointer = VBHourGlass/VBNormal.
You are the administrator of CompanyX network. You configure a Windows 2000 Server computer as the DNS server for your network. You create both standard primary forward lookup and reverse lookup zones. You discover that when you use the nslookup utility, you cannot resolve host names from IP addresses on your network. You also discover that when you run the Tracert.exe utility, you receive the following error message. "Unable to resolve target system name." What should
Answer: C
You want to pass a BSTR to a DLL procedure that expects an LPSTR as an argument. Howmust you pass the BSTR?*(A) by value(B) by reference(C) by pointer
When variable is passed in arguments of procedure what will be its value (comment--notusing Byval keyword comment was not in exam)(A) value*(B) pointer to variable
You want to pass a BSTR to a DLL procedure that expects an LPSTR as an argument. How must youpass the BSTR?(A) by pointer*(B) by value(C) by reference
What are the ranges in bytes over which Btrieve validates the position block pointer, the data length pointer, the data buffer and the key buffer?
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