Weekly Contest #8 - TechXNinjas

What is the main purpose of a pure virtual function in C++?

• To provide a default implementation that can be overridden.

• To enforce that derived classes must override the function.

• To optimize the execution speed of virtual functions.

• To allow multiple inheritance in C++.

1. What is the time complexity of this function for an input n?

(a)  

Which of the following statements about default arguments in functions is true?

• Default arguments can be placed anywhere in the parameter list of a function.

• Default arguments must be provided for all parameters of a function.

• Default arguments must be specified from right to left in the parameter list.

• Default arguments are mandatory for all overloaded functions.

Which of the following operators cannot be overloaded in C++?

• + (plus)

• == (equality)

• && (logical AND)

• [ ] (subscript)

Will this code compile?

• Yes

• No

Which of the following statements is correct about function pointers?

• Function pointers can only point to functions that have no parameters.

• Function pointers can only point to functions that return void.

• Function pointers can point to member functions without any restrictions.

• Function pointers can point to any function that matches the signature of the pointer type.

Which of the following is a disadvantage of using inline functions?

• They decrease the execution time of the program.

• They increase the code size due to code duplication.

• They require more memory allocation for variables.

• They cannot be used in header files.

What are the values of x, y, and z after execution?

Fill answer like this: 1, 2 & 3

(a)  

What is the main use of the scope resolution operator :: in C++?

• To access a global variable when a local variable has the same name.

• To resolve ambiguity in function overloading.

• To access private members of a class.

• To initialize class members directly.

What will be the value of "c" after the execution of the code?

• 15

• 17

• 10

• 5