What happens when a function is called in C++?

The control is transferred to the function

What is a control statement in C++?

A statement that controls program flow

What is a function prototype?

A function declaration before definition

What is the difference between pass-by-value and pass-by-reference?

Pass-by-value copies the argument, pass-by-reference uses actual variable

What does the continue statement do?

Skips the rest of the code and moves to the next iteration

What is function overloading?

Defining multiple functions with the same name but different parameters

What does sizeof(arr)/sizeof(arr[0]) return for an array?

Number of elements in the array

What is the syntax of a for loop?

for(initialization; condition; update) {}

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C++ functions, arrays and control statements

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Questions 30

Answers

1
Which statement is used to exit a switch case?
Exit
Break
Return
Continue
2
What is the index of the first element in an array?
Depends on initializtion
1
-1
0
3
What is the last valid index of an array int arr[10] (two answers)?
11
9
10
-1
4
Which of the following is a selection control statement?
While
Switch
For
If else
5
What is the purpose of std::vector in C++?
To create a dynamic array
To replace std::array
To optimize loop performance
To perform mathematical operations
6
What is the return type of a function that does not return any value?
Void
Float
Char
Int
7
What happens when a function is called in C++?
The program terminates
A new program starts
The control is transferred to the function
None of the above
8
What is recursion?
A function with multiple return statements
A function that executes in a loop
A function calling another function
A function calling itself
9
What is the default return type of a function in C++ if not specified?
Void
Float
Int
Char
10
What is the correct syntax to declare a function in C++?
void function[];
function void();
void function();
void function{}
11
What will happen if you don't initialize an array?
Runtime error
It will contain garbage values
Compiler error
It will be initialized to 0
12
What is the correct way to initialize an array in C++?
int arr[3] = 1, 2, 3;
int arr(3) = {1, 2, 3};
int arr[3] = {1, 2, 3};
int arr{3} = {1, 2, 3};
13
How do you pass an array to a function?
All of the above
void func(int arr[])
void func(int arr[10])
void func(int *arr)
14
What is an infinite loop?
A loop with a break statement
A loop with a continue statement
A loop that runs indefinitely
A loop with a fixed number of iterations
15
What does the break statement do?
Jumps to another function
Restarts the loop
Skips the current iteration
Exits the loop
16
What is a control statement in C++?
A function in C++
A statement that controls input/output
A statement that controls hardware
A statement that controls program flow
17
What is a function prototype?
A function with no body
A function that has only parameters
A function declaration before definition
A function that returns an object
18
What is a multi-dimensional array?
A function that returns an array
An array of arrays
A list of multiple arrays
An array with multiple data types
19
What is the difference between pass-by-value and pass-by-reference?
Pass-by-value copies the argument, pass-by-reference uses actual variable
Pass-by-reference creates a new variable
Both pass a copy of the argument
There is no difference
20
How is an array declared in C++?
array[5] int;
array int[5];
int array(5);
int array[5];
21
What does the continue statement do?
Stops program execution
Jumps to another function
Exits the loop
Skips the rest of the code and moves to the next iteration
22
What is function overloading?
Using a function inside another function
Defining multiple functions with the same name but different parameters
A function that does not return any value
A function with more than one return type
23
Which keyword is used to return a value from a function?
Retrieve
Back
Return
Return()
24
What does sizeof(arr)/sizeof(arr[0]) return for an array?
Address of the array
Number of elements in the array
Size of one element
Total size of the array in bytes
25
How many times will this loop execute?For(int i = 0; i < 5; i++) { }
6
4
Infinite
5
26
Which loop is guaranteed to execute at least once?
For
Do while
None
While
27
What is the syntax of a for loop?
for(condition; initialization; update) {}
for(initialization; condition; update) {}
for(initialization, condition, update) {}
for(update; condition; initialization) {}
28
Can a function return multiple values in C++?
Yes, using reference parameters
All of the above
Yes, using an array
Yes, using a struct or tuple
29
Can switch statements work with float values?
Yes
Only in newer C++ versions
Only with double
No
30
What will happen if we access an index beyond the array size?
Undefined behavior
Compiler error
Runtime error
Program exits normally

C++ functions, arrays and control statements Flashcards | StudBud