What is const in C?
The const keyword is used to make a variable read-only (its value cannot be changed after initialization).
It tells the compiler: βThis variableβs value should not be modified.β
Trying to change a const variable will usually give a compile-time error.
Example: Using const with a variable
#include <stdio.h>
int main() {
const int x = 10; // constant integer
printf("Value of x: %d\n", x);
// x = 20; // β Error: assignment of read-only variable
return 0;
}
β
Output:
Value of x: 10
1 - 1
What is the decimal equivalent of the hexadecimal number 2F?
1 - 1
Python program that converts Decimal Number System to Octal Number System:
decimal_num = int(input("Enter a decimal number: "))
octal_num = oct(decimal_num)
print("Octal representation:", octal_num)
Sample Output:
Enter a decimal number: 25
Octal representation: 0o31
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A compiler translates the entire source code into machine code at once, while an interpreter translates and executes code line by line.
2 - 1
Which of the following is not a feature of Python?
1 - 1
C program to Calculate Simple Interest:
Find the error
#include <stdio.h>
int main() {
float p, r, t, si;
printf("Enter Principal, Rate and Time: ");
scanf("%f %f %f", &p, &r, t);
si = (p * r * t) / 100;
printf("Simple Interest = %f\n", si);
return 0;
}
Comment down your answer
1 - 5
Variable Declaration, Initialization and Assignment in C
1. Variable Declaration
Tells the compiler the name and type of a variable (reserves memory).
Does not always assign a value.
π Example:
int age; // Declares an integer variable 'age'
float salary; // Declares a floating-point variable 'salary'
2. Variable Initialization
Means giving an initial value to a variable at the time of declaration.
π Example:
int age = 20; // age is declared and initialized to 20
float salary = 5000.5; // salary is declared and initialized
3. Variable Assignment
Means storing a value into a variable (after it has been declared).
Can happen anywhere in the program.
π Example:
int age; // Declaration
age = 25; // Assignment after declaration
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The print() function in Python always separates multiple arguments with a space by default
1 - 1
Negative indexing in Python strings starts from -0.
3 - 1
What is the ASCII value of the character 'A'?
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