This option is correct because the value of “failbit” is 1, when a non-fatal I/O error is encountered.

By executing multiple programmes at a same time, it will increase or maximize the CPU utilization. By running more than one programmes it uses more resources for executing in less time. Multiprogramming is accomplished due to the differences in I/O and processing speed. While one program is waiting for input, instructions in another program can be executed.

All above are the functions of loader. Basically, loader have four functions as follows : -  

1. Allocate space in memory for programs
2. Resolve symbolic references between objects modules 
3. Physically place the machine instructions and data into memory  
4. Adjust all address dependent location such as address constants, to corresponds to allocated space (relocation)

 EX - OR gate behaves like an odd parity checker. The Ex- OR gate asserts its output when the input stream contains an odd number of 1's . 

Operational testing and evaluation activities are typically conducted on large, complex systems such as aircraft and military acquirer activity systems.

A 9 bit address, 8 bit cell size, 1024 cells is impossible since the address is too short. We cannot address 1024 cells with only 9 address bits as 2⁹ = 512 So, the cell size is possible but it is not an advisable memory structure and not a standard size.

A multiplexer is a circuit with many inputs but only one output. For MUX with n inputs, there must at least m control signals where 2^m = n, where n = 8, therfore m = 3, 2³ = 8 (8x1 MUX) 8 to 1 multiplexer have 3 selection line(s_0 ,  s_{1 and}  s₂ ), 8 input lines and 1 output. 

This option is correct as the copy constructor is invoked when an object is passed by value to a function. The pass by value method requires a copy of passed arguments to be created for the function to operate upon.

This option is correct because zero represents Boolean zero and its negation (!) will return Boolean true value, i.e. 1, hence this option is correct.

 This option is correct as a constructor always has same name as its class with no return type, not even 'void'.

This option is correct because given statement is incorrect as static member function can access only static members (functions or variables) of the same class.

If we take half of the expression first (6<=6)||(5!=6) the value of expression (5!=6) and (6<=6) will be Boolean true value and we know that for even one condition to be true the OR (||) operator gives Boolean true value. Now we are left with the rest of the expression (5<3)&&(Prev value obtained), we know that && operator gives Boolean true value if both the conditions are true, but here (5<3) will return Boolean false value and hence the value of the whole expression will be 0.

 A preprocessor directive statement always begins with '#' symbol in 'C'.

This option is correct as ceil() function returns the smallest integer represented as a double not less than num. Example: ceil(1.30) gives 2.0, ceil(-1.03) gives -1.0

This looping structure executes a block of instruction for the specified number of time.

This function is used  to free a block of allocated memory in 'C' program.

Width of a tree refers to the maximum no. of nodes in the tree structure.

This file mode in 'C' is used to open a file in both read and write mode as well as to delete the previous data stored in the file.

'Switch-Case' statement comes under the selection structure as it allows the user to select appropriate case statement depending upon the choice of the user.

This function is used in 'C' to write a single character into an output file.

This string function in 'C' searches for a specified character in the string. It returns NULL, if the desired character is not found in the string.

Delimiter is also called as separator in 'C', used to separate literals, variables, statements, etc.

This option is correct as '+' operator is having higher precedence over > and ?: operator but we have used the parentheses to set up the priority and the compiler will read as per our priority setup and get the desired result.

This option is correct as the given statement is incorrect because however, static data member is visible within the class but its lifetime is the entire program.

This option is correct as precedence of NOT operator is higher than AND and OR operator and precedence of AND operator is higher than OR operator.