 Related Questions A switch statement is generally best to use when you have more than two conditional expressions based on a single variable of numeric type. Latest Answer : Also, a modern C optimizing compiler will generate the same binary for multiple "if" statements as opposed to a "switch" statement. However, code that uses "switch" for multiple numeric (symbolically speaking) comparisons ... An lvalue is an expression to which a value can be assigned. The lvalue expression is located on the left side of an assignment statement, whereas an rvalue is located on the right side of an assignment Latest Answer : lvalue is is a memory location,whose value is not constant i.e it's value is changed when a new value entered into that location.And also it can be say as, it is an expression,where left side we have an identifier and right side(rvalue) the ... An lvalue was defined as an expression to which a value can be assigned. Is an array an expression to which we can assign a value? The answer to this question is no, because an array is composed of several Latest Answer : Array is not an lvalue..Eg.int arr[5] = {"1","2",.......};here arr[5] has memory address and now we are assinging values to this.if we write arr[5]; in any function then it will not show any error, mean array does required lvalue ... Some operating systems (such as UNIX or Windows in enhanced mode) use virtual memory. Virtual memory is a technique for making a machine behave as if it had more memory than it really has, by using disk Latest Answer : First of all there is a one sentence definition of Page Thrashing (I believe someone posted a similar answer here):Page Thrashing only comes about when you use Virtual Memory which requires an MMU and "fools" a process into believing that it ... The register modifier hints to the compiler that the variable will be heavily used and should be kept in the CPU’s registers, if possible, so that it can be accessed faster. There are several restrictions Latest Answer : If a variable is defined by using register modifier it tells to the compiler that the variable is used repetedly and that variable executes fastly. Generally register variables are defined in loop counters. This variable stored in CPU registers and access ... The volatile modifier is a directive to the compiler’s optimizer that operations involving this variable should not be optimized in certain ways. There are two special cases in which use of the Yes. The const modifier means that this code cannot change the value of the variable, but that does not mean that the value cannot be changed by means outside this code. For instance, in the example in Latest Answer : But isnt like the constant variables will be stored by in ROM (read only memory).Then how can the some process other than the code can change the value of const volatile ... For integral types, on a machine that uses two’s complement arithmetic (which is just about any machine you’re likely to use), a signed type can hold numbers from –2(number of bits – Latest Answer : Consider the 3 bitsFor signed int these 3 bits contains both positive and negative valuesyou can find max and min values as follows-2 ^ ( n-1 ) to ( 2 ^ ( n-1 ) - 1 ) ie, n is no. of bits-4, -3, -2, -1, 0, 1, 2, 3For unsigned int you can find the ... A type cast should not be used to override a const or volatile declaration. Overriding these type modifiers can cause the program to fail to run correctly. A type cast should not be used to turn a pointer Latest Answer : we should not cast the big datatype to smaller one. Like from double to float long to integer. TIn these cases there will be chance of loosing the valuable data itself. ... A global variable that must be accessed from more than one file can and should be declared in a header file. In addition, such a variable must be defined in one source file. Variables should not be defined Latest Answer : A variable can be declare/define in a C Header without any kind of compilational/ logical errors. But it is against the coding specifications and it is not normally practiced. If proper Multiple inclusion protection macro is used, then there will be no ...
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