C++ Basics
MATLAB Basics
Debugging C++
Debugging MATLAB
File Handling & Data Structures
Logical & Control Flow
100
What is the correct syntax to declare an integer variable named num in C++?
int num;
100
What is the default numeric data type in MATLAB?
double
100
What will happen if you forget to initialize a pointer before dereferencing it in C++?
It leads to undefined behavior, possibly causing a segmentation fault.
100
What MATLAB command stops execution at the first error?
dbstop if error
100
Which C++ library is required for file handling?
#include <fstream>
100
What type of loop ensures execution at least once in C++?
do-while
200
What is the purpose of the #include <iostream> statement in C++?
It allows the program to use input and output functions like cout and cin.
200
What will be the output of the following MATLAB code? 
2 3 (A 2-row, 3-column matrix)
200
Why does the following C++ program cause an error? 
The variable num is used before being initialized, leading to undefined behavior.
200
Why does this MATLAB script fail? 
Variable y is undefined.
200
How do you check if a file exists in MATLAB before opening it?
isfile('filename.txt')
200
What does the MATLAB function mod(5,2) return?
1 (Remainder of 5 / 2)
300
What will be the output of the following C++ code?
11 (Multiplication has higher precedence than addition: 4 * 2 + 3 = 11).
300
What does the : operator do in MATLAB when used like this?
Creates a vector [1 3 5 7 9], where 1 is the start, 2 is the step size, and 10 is the end limit.
300
What is wrong with this C++ loop? 
The semicolon after while (i < 5); makes the loop do nothing, causing an infinite loop.
300
What will MATLAB return for the following?
An error: Index exceeds matrix dimensions.
300
How do you append text to a file in MATLAB?
Use fopen('file.txt', 'a')
300
What will be the output of this MATLAB loop?
Prints 1 3 5.
400
What is the difference between endl and \n in C++ when printing output?
Both create a new line, but endl also flushes the output buffer, which can slow performance.
400
What command would you use to display both variable values and their names in MATLAB?
whos
400
How can you use gdb to set a breakpoint at line 10 of main.cpp?
Run gdb a.out, then type break main.cpp:10.
400
What command lists all breakpoints in a MATLAB script?
dbstatus
400
Which function reads a line from a file in C++?
getline(ifstream, string)
400
What will be the output of this C++ loop?
Hello Hello Hello
500
How does a switch statement differ from an if-else statement in C++?
A switch is more efficient when comparing a single variable to multiple constants because it uses jump tables, whereas if-else statements evaluate conditions sequentially.
500
What will the following MATLAB script display? 
[1 2 3] (Element-wise division)
500
Why does this C++ program crash? 
Array index out of bounds error (arr[10] is out of range, valid indices are 0-9).
500
How do you remove all breakpoints from a MATLAB script?
dbclear all
500
What does the following MATLAB function do?
It squares each element in x and adds 2.
500
What will the following MATLAB code output?
0 0 1 1 (Boolean mask)