Question 1

Empty parentheses following a function name in a function prototype indicate that the function does not require any parameters to perform its task.

Accepted Answer

In C and C++, empty parentheses in a function prototype indicate that the function does not take any arguments.

Question 2

C++ programmers concentrate on creating , which contain data members and the member functions that manipulate those data members and provide services to clients.
A)structures
B)classes
C)objects
D)function

Accepted Answer

C++ programmers focus on creating classes, which encapsulate data members (variables) and member functions (methods) that operate on these data members. Classes serve as blueprints for creating objects.

Question 3

Which of the following is FALSE about references in C++
A)a reference must be initialized when declared
B)once a reference is created, it cannot be later made to reference another object; it cannot be reset
C)references cannot be null
D)references cannot refer to constant value

Accepted Answer

References in C++ can indeed refer to constant values. The other statements (A, B, C) are true regarding references in C++.

Question 4

What will be the output of following program?#include <iostream> using namespace std;class Test{public:Test() { cout <<"Hello from Test() "; }} a;int main(){cout <<"Main Started "; return 0;}
A)main started
B)main started hello from test()
C)hello from test() main started
D)compiler error: global objects are not allowed

Accepted Answer

The global object 'a' of class Test is created before entering the main() function, calling its constructor and printing "Hello from Test() ". Then, the execution enters the main() function and prints "Main Started ", resulting in the output "Hello from Test() Main Started ".

Question 5

Which of the following is true about constructors.
1) They cannot be virtual.
2) They cannot be private.
3) They are automatically called by new operator
A)all 1, 2, and 3
B)only 1 and 3
C)only 1 and 2
D)only 2 and 3

Accepted Answer

1) Constructors cannot be virtual because virtual functions are meant to be overridden in derived classes, and constructors cannot be inherited. 3) Constructors are indeed automatically called by the new operator to initialize an object when it is created. 2) Constructors can be private, which is a technique used in certain design patterns, such as the Singleton pattern.

Question 6

Which of the following operators are overloaded by default by the compiler?
1) Comparison Operator ( == )
2) Assignment Operator ( = )
A)both 1 and 2
B)only 1
C)only 2
D)none of the two

Accepted Answer

The assignment operator (=) is overloaded by default by the compiler to perform a shallow copy if not explicitly defined by the user. The comparison operator (==) is not overloaded by default; it compares the addresses for objects unless explicitly defined to compare the object states or values.

Question 7

Which of the following is true about inline functions and macros.
A)inline functions do type checking for parameters, macros don't
B)macros cannot have return statement, inline functions can
C)macros are processed by pre-processor and inline functions are processed in later stages of compilation.
D)all of the above

Accepted Answer

All the statements provided are correct regarding the differences between inline functions and macros. Inline functions allow for type checking, can have return statements, and are handled during the compilation process, unlike macros which are expanded by the preprocessor without type checking or the ability to use return statements in the traditional sense.

Question 8

In C++, const qualifier can be applied to?Member functions of a class?Function arguments?To a class data member which is declared as static?Reference variables
A)only 1, 2 and 3
B)only 1, 2 and 4
C)all of the above
D)only 1, 3 and 4

Accepted Answer

The const qualifier can be applied to member functions of a class (to make them promise not to modify any class member variables), function arguments (to prevent them from being modified inside the function), to a class data member which is declared as static (to make the static member constant), and to reference variables (to prevent the modification of the object or primitive type they refer to).

Question 9

Which type is best suited to represent the logical values?
A)integer
B)boolean
C)character
D)all of the mentioned

Accepted Answer

Boolean types are specifically designed to represent logical values, typically true or false, making them the most suitable choice for this purpose.

Question 10

The following is the C++ style comment
A)//
B)/*..*/
C)-
D)none of above

Accepted Answer

C++ supports both single-line and multi-line comments. The single-line comment starts with //, while the multi-line comment starts with /* and ends with */.

Question 11

Which of the following statements is false?
A)every c++ program must have a main().
B)in c++, white spaces and carriage returns are ignored by the compiler.
C)c++ statements terminate with semicolon.
D)main() terminates with semicolon.

Accepted Answer

The statement "main() terminates with semicolon." is false because in C++, the main() function does not terminate with a semicolon. Instead, the statements within the main() function end with semicolons, and the function itself is defined with curly braces without a terminating semicolon.

Question 12

Functions can returns
A)arrays
B)references
C)objects
D)all of above

Accepted Answer

Functions in many programming languages can return arrays, references, and objects, making all of the provided options correct.

Question 13

Which of the following control expressions are valid for an if statement?
A)an integer expression
B)a boolean expression
C)either a or b
D)neither a nor b

Accepted Answer

An if statement can be controlled by either an integer expression (where 0 is typically treated as false and non-zero values as true in languages that allow it) or a boolean expression (true or false directly).

Question 14

What will be the values of x, m and n after execution of the following statements? Int x, m, n;m=10; n=15;x= ++m + n++;
A)x=25, m=10, n=15
B)x=27, m=10, n=15
C)x=26, m=11, n=16
D)x=27, m=11, n=16

Accepted Answer

The answer of What will be the values of x,...

Question 15

Which of the following approach is adapted by C++?
A)top-down
B)bottom-up
C)right-left
D)left-right

Accepted Answer

C++ primarily uses a bottom-up approach, focusing on building complex systems by combining smaller, reusable components or objects.

Question 16

Which of the following is the correct class of the object cout?
A)iostream
B)istream
C)ostream
D)ifstream

Accepted Answer

The object `cout` belongs to the class `ostream`, which is used for output streaming operations.

Question 17

Which of the following functions are performed by a constructor?
A)construct a new class
B)construct a new object
C)construct a new function
D)initialize objects

Accepted Answer

The answer of Which of the following functions are performed...

Question 18

Which of the following ways are legal to access a class data member using this pointer?
A)this->x
B)this.x
C)*this.x
D)*this-x

Accepted Answer

The correct syntax to access a class data member using the `this` pointer is `this->x`. The `this` pointer is a special pointer used in C++ to refer to the current object, and the arrow operator (`->`) is used to access members of the object it points to.

Question 19

Which operator is having right to left associativity in the following?
A)array subscripting
B)function call
C)addition and subtraction
D)type cast

Accepted Answer

Type casting in C/C++ has right to left associativity, meaning the type cast is applied from the rightmost expression to the left.

Question 20

Which operator is having the highest precedence?
A)postfix
B)unary
C)shift
D)equality

Accepted Answer

Postfix operators (like function calls, array subscriptions, and increment/decrement operators) have the highest precedence among the options listed.

Quiz 3: C++ Programming Concepts

Empty parentheses following a function name in a function prototype indicate that the function does not require any parameters to perform its task.

C++ programmers concentrate on creating , which contain data members and the member functions that manipulate those data members and provide services to clients.

Which of the following is FALSE about references in C++

What will be the output of following program?#include <iostream> using namespace std;class Test{public:Test() { cout <<"Hello from Test() "; }} a;int main() {cout <<"Main Started "; return 0;}

Which of the following is true about constructors. 1) They cannot be virtual. 2) They cannot be private. 3) They are automatically called by new operator

Which of the following operators are overloaded by default by the compiler? 1) Comparison Operator ( == ) 2) Assignment Operator ( = )

Which of the following is true about inline functions and macros.

In C++, const qualifier can be applied to?Member functions of a class?Function arguments?To a class data member which is declared as static?Reference variables

Which type is best suited to represent the logical values?

The following is the C++ style comment

Which of the following statements is false?

Functions can returns

Which of the following control expressions are valid for an if statement?

What will be the values of x, m and n after execution of the following statements? Int x, m, n;m=10; n=15;x= ++m + n++;

Which of the following approach is adapted by C++?

Which of the following is the correct class of the object cout?

Which of the following functions are performed by a constructor?

Which of the following ways are legal to access a class data member using this pointer?

Which operator is having right to left associativity in the following?

Which operator is having the highest precedence?