Question { 817 }

What is the OOPs concept?

Answer

The Object-Oriented Programming System, or OOPs for short, is a paradigm that offers ideas like inheritance, classes, and objects.

Question { 958 }

What are the concepts introduced in OOPs?

Answer

An object is a physical thing with a specific state and behavior. It can be described as a class instance.
A class is a logical entity that specifies the blueprint that may be used to generate or instantiate an object.
An object acquiring all of its parent object's characteristics and actions is referred to as inheritance. It offers the possibility to reuse code.

The idea of polymorphism permits a task to be carried out in various ways. To accomplish polymorphism in Java, we employ method overloading and overriding.
Abstraction is a notion that only displays an application's functionality while concealing its internal workings. Java achieves abstraction through the usage of abstract classes and interfaces.
Encapsulation is a term that describes how data and code are wrapped together into

Question { 861 }

Explain what a Binary Search Tree is.

Answer

Data is efficiently stored and retrieved using a binary search tree.
Nodes with keys less than the node's key value can be found in the left sub-tree.
Nodes with keys larger than or equal to the node's key value can be found in the right sub-tree.

Question { 860 }

Explain Doubly Linked Lists?

Answer

A specific kind of linked list that allows traversal across the data components in both directions is called a doubly linked list.
Every node has two linkages, one to the node next to it and one to the node in front of it, which enables accomplishing this.

Question { 1200 }

What are the key features of C?

Answer

 Simple and efficient
 Portable
 Procedural language
 Rich set of built-in functions and operators
 Low-level access to memory
 Pointer support

Question { 1200 }

What are the key features of C?

Answer

• Object-Oriented Programming: Encapsulation, Inheritance, Polymorphism.
• Memory management via pointers.
• Support for both high-level and low-level programming.
• Strong type checking.
• STL (Standard Template Library) for reusable components.

Question { 1040 }

What is the difference between int and float?

Answer

 int: Stores integer values (e.g., 1, -10).
 float: Stores floating-point numbers (e.g., 3.14, -2.7).

Question { 945 }

What is the use of the #include directive?

Answer

The #include directive is used to include header files in a program. For example, #include includes the standard input-output library.

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Question { 1204 }

What are the different types of storage classes in C?

Answer

 Auto: Default storage class for local variables.
 Static: Retains variable value between function calls.
 Extern: Refers to global variables used in other files.
 Register: Suggests storing variables in the CPU register

Question { 879 }

What is the difference between a structure and a union?

Answer

 Structure: All members have their own memory location.
 Union: All members share the same memory location.

Question { 846 }

How can you dynamically allocate memory in C?

Answer

Memory can be dynamically allocated using functions like malloc(), calloc(), realloc(), and freed using free().

Question { 685 }

What are macros in C?

Answer

Macros are preprocessor directives defined using #define to create constants or functions.

Question { 778 }

What is a segmentation fault?

Answer

It occurs when a program attempts to access an invalid memory location.

Question { 820 }

What is the use of the sizeof operator?

Answer

The sizeof operator determines the size of a data type or variable in bytes.

Question { 801 }

Explain the difference between fopen() and freopen().

Answer

 fopen(): Opens a new file.
 freopen(): Reopens a file stream to a different file or mode.