Module 7

Question 1

A segment that groups a number of program statements to perform specific task

Answer 1

function

Question 2

Formal parameters are variables used within the function header that receives a copy of the actual argument values.

Answer 2

True

Question 3

If we have a function int stop (int n) , can we send it a different variable in the main program? For example, stop (x)

Answer 3

Yes

Question 4

From which function the execution of a C++ program starts?

Answer 4

main( ) function

Question 5

int my_function (double a), what type of data will this functions take in?

Answer 5

double

Question 6

What is the scope of the global variable declared outside the user defined function and after the preprocessor directive?

Answer 6

Whole prorgram

Question 7

Which of the following is important in a function?

Answer 7

Both return type and function name

Question 8

Which data structure is used to perform recursion?

Answer 8

stack

Question 9

A recursive program cannot call itself always, or it would never stop at some point, the routine encounters a subtask that it can perform without calling itself. This case is called the recursive case.

Answer 9

False

Question 10

Which of the following statements is true?

Answer 10

Recursion uses more memory compared to iteration

Question 11

Recursion performs faster while executing the iteration process.

Answer 11

False

Question 12

In recursion, the condition for which the function will stop calling itself is ____________

Answer 12

base case

Question 13

Recursion makes our code shorter and cleaner.

Answer 13

True

Question 14

A function is a self contained block of code with a specific purpose.

Answer 14

True

Question 15

It consists of data type, name of the function and parameter listing.

Answer 15

function header

Question 16

Where should the prototype be?

Answer 16

before int main ( )

Question 17

Where does the execution of the program starts?

Answer 17

main ( ) function

Question 18

A function that can be made to return a single value to the calling program is referred to as void function.

Answer 18

False

Question 19

Which of the following statement is correct?

• Only one parameter of a function can be a default parameter.
• No parameter of a function can be default.
• Minimum one parameter of a function must be a default parameter.
• All the parameters of a function can be default parameters.

Answer 19

All the parameters of a function can be default parameters.

Question 20

The only difference between the header and the prototype is the colon.

Answer 20

False

Question 21

All the recursive calls are pushed onto the stack

Answer 21

True

Question 22

Which of the following problems can be solved using recursion?

i. Factorial of a number
ii. Nth Fibonacci number
iii. Length of a string

Answer 22

i,ii,iii

Question 23

Any problem that can be solved recursively cannot also be solved iteratively.

Answer 23

False

Question 24

Recursion is a method in which the solution of a problem depends on ____________

Answer 24

Smaller instances of the same problem

Question 25

Where does the return statement returns the execution of the program?

Answer 25

calling function

Question 26

If a variable is declared inside a function, what kind of variable is this?

Answer 26

local variable

Question 27

What will happen while using pass by reference? - The function declaration should contain ampersand (& in its type declaration) - The values of those variables are passed to the function so that it can manipulate them - The location of variable in memory is passed to the function so that it can use the same memory area for its processing

Answer 27

The location of variable in memory is passed to the function so that it can use the same memory area for its processing

Question 28

It provides one-way communication of data from the calling program to the function.

Answer 28

pass by value

Question 29

Which of the following is the default return value of functions in C++?

Answer 29

int

Question 30

The number of actual arguments must be _________ as the number of formal parameters.

Answer 30

equal

Question 31

The case in which the routine calls itself to perform a subtask, is called as base case.

Answer 31

False

Question 32

When a recursive function is executed, the recursive calls are implemented instantly.

Answer 32

False

Question 33

Any routine that calls itself is recursive.

Answer 33

True

Question 34

The recursive routine always contains a selection statement-either an "if" or a "switch".

Answer 34

True

Question 35

Recursion itself cannot be used as a replacement to iteration or looping

Answer 35

False

Question 36

Recursion is similar to which of the following? - loop - nested ifs - if-else - switch_case

Answer 36

loop

Question 37

Which of the following problems can’t be solved using recursion? - Nth fibonacci number - Problems without base case - Length of a string - Factorial of a number

Answer 37

Problems without base case

Question 38

If the function returns a value then the return_type must be void.

Answer 38

False

Question 39

Here is a function, double numbers (int x), what data type will this function return?

Answer 39

double

Question 40

By default how the value are passed in C++?

Answer 40

call by value

Question 41

Which of the following is used to terminate the function prototype?

Answer 41

;

Question 42

The following are problems that often have simple recursive solutions except ________.

Answer 42

display an output

Question 43

Recursion is required in problems concerning advanced algorithms such as Graph and Tree Traversal.

Answer 43

True

Question 44

Which is NOT an essential feature of a proper recursive function?

Answer 44

Not permitted to do any I/O

Question 45

Only predefined functions can be involved in recursion.

Answer 45

False

Question 46

What is the scope of the variable declared in the user defined function?

Answer 46

only inside the { } block

Question 47

Which is more effective while calling the functions?

Answer 47

call by reference

Question 48

The program that calls a function is often referred to as the calling program.

Answer 48

True

Question 49

If a variable is declared outside a function and can be used by other functions, what kind of variable is this?

Answer 49

global variable