Technical Interview Questions for CTS (Cognigent) for Degree Students

Interview Questions for Cognigent (CTS) Degree Students

1. What is OS (Operating System)?

An operating system (OS) is the program that, after being initially loaded into the computer by a boot program, manages all the other programs in a computer. The other programs are called applications or application programs. The application programs make use of the operating system by making requests for services through a defined application program interface (API). In addition, users can interact directly with the operating system through a user interface such as a command line or a graphical user interface (GUI).

2. What is a deadlock?

Deadlock describes a situation where two or more threads are blocked forever, waiting for each other. ... A Java multithreaded program may suffer from thedeadlock condition because the synchronized keyword causes the executing thread to block while waiting for the lock, or monitor, associated with the specified object.

3. What is a semaphore?

A semaphore is a value in a designated place in operating system (or kernel) storage that each process can check and then change. Depending on the value that is found, the process can use the resource or will find that it is already in use and must wait for some period before trying again

4. Difference between semaphore & monitor?

A monitor is a set of multiple routines which are protected by a mutual exclusion lock whereas , A semaphore is a simpler construct than a monitor because it's just a lock that protects a shared resource – and not a set of routines like a monitor. ...Monitors, unlike semaphores, automatically acquire the necessary locks

5. What is sdlc(software development life cycle)? 

The systems development life cycle (SDLC), also referred to as the application development life-cycle, is a term used in systems engineering, information systems and software engineering to describe a process for planning, creating, testing, and deploying an information system

6. What is a linklist,stack,queue?

A linked list is a linear data structure where each element is a separate object. Each element (we will call it a node) of a list is comprising of two items - the data and a reference to the next node. The last node has a reference to null. The entry point into a linked list is called the head of the list.
Java provides an inbuilt object type called Stack. It is a collection that is based on the last in first out (LIFO) principle. On Creation, a stack is empty. It extends Vector class with five methods that allow a vector to be treated as a stack. ... Object push(Object element) : Pushes an element on the top of the stack.

A queue is a data collection in which the items are kept in the order in which they were inserted, and the primary operations are enqueue (insert an item at the end) and dequeue (remove the item at the front)

7. Write a program to reverse a linklist?
class LinkedList {

    static Node head;

    static class Node {

        int data;

        Node next;

        Node(int d) {

            data = d;

            next = null;

        }

    }

    /* Function to reverse the linked list */

    Node reverse(Node node) {

        Node prev = null;

        Node current = node;

        Node next = null;

        while (current != null) {

            next = current.next;

            current.next = prev;

            prev = current;

            current = next;

        }

        node = prev;

        return node;

    }

    // prints content of double linked list

    void printList(Node node) {

        while (node != null) {

            System.out.print(node.data + " ");

            node = node.next;

        }

    }

    public static void main(String[] args) {

        LinkedList list = new LinkedList();

        list.head = new Node(85);

        list.head.next = new Node(15);

        list.head.next.next = new Node(4);

        list.head.next.next.next = new Node(20);

         

        System.out.println("Given Linked list");

        list.printList(head);

        head = list.reverse(head);

        System.out.println("");

        System.out.println("Reversed linked list ");

        list.printList(head);

    }

}

8. What is DBA?

Database administration is the function of managing and maintaining database management systems (DBMS) software. ... As such, corporations that use DBMSsoftware often hire specialized information technology personnel called Database Administrators or DBAs.

9. Different type of databases?

There are four structural types of database management systems:

·         Hierarchical databases.

·         Network databases.

·         Relational databases.

·         Object-oriented databases.

                                        
10. What is normalsation?

Normalization is a database design technique which organizes tables in a manner that reduces redundancy and dependency of data.

11. Four division in cobol?

The four divisions are:

§  Identification Division

§  Environment Division

§  Data Division

§  Procedural Division

Linked List
12.function of compiler?

A compiler is a computer program (or a set of programs) that transforms source code written in a programming language (the source language) into anothercomputer language (the target language), with the latter often having a binary form known as object code.

13. Difference between c &c++?

The major difference between C and C++ is that C is a procedural programming language and does not support classes and objects, while C++ is a combination of both procedural and object oriented programming language; therefore C++ can be called a hybrid language.
Difference between c and c++

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Cognigent Interview Questions for Degree Students

Aptitude Interview Questions for CTS (Cognigent) for Degree Students