TCS fresher Interview Questions, Process, and Tips

An array is a collection of similar data types stored in contiguous memory locations.

• Arrays can be of any data type such as integers, floats, characters, etc.

• Arrays are accessed using an index starting from 0.

• Arrays can be one-dimensional, two-dimensional, or multi-dimensional.

• Example: string[] names = {"John", "Jane", "Bob"};

• Example: int[] numbers = new int[5];

Call by value passes a copy of the value while reference by value passes a copy of the reference to the value.

• Call by value passes the value of a variable to a function, while reference by value passes the reference to the variable.

• In call by value, any changes made to the parameter inside the function do not affect the original variable outside the function.

• In reference by value, any changes made to the parameter insi...read more

Syntax for while loop and for loop

• For loop: for(initialization; condition; increment/decrement){ //code block }

• While loop: while(condition){ //code block }

• Example: for(int i=0; i<5; i++){ cout<

• Example: int i=0; while(i<5){ cout<

Pointer is a variable that stores the memory address of another variable in C programming language.

• Pointers are used to manipulate data structures like arrays, linked lists, and trees.

• They can be used to pass values by reference to functions.

• Pointer arithmetic can be performed to access elements of an array.

• Example: int *ptr; ptr = # printf("%d", *ptr);

• Example: void swap(int *a, int *b) { int temp = *a; *a = *b; *b...read more