Here we have compiled the most probable interview questions and answers asked in the Cognizant. These questions are curated after discussing with many interviewers and employes who have cleared the interviews in various levels at Cognizant.
With a focus on business consulting, information technology, and outsourcing, Cognizant is an international technology corporation with headquarters in the US. The corporate office of the business is located in Teaneck, New Jersey. One of the most prosperous and rapidly expanding businesses in the world, Cognizant is a component of the NASDAQ-100, S&P 500, Forbes Global 2000, and Fortune 500.
In order for businesses to stay ahead in a rapidly changing world, Cognizant helps them modernise technology, reimagine processes, and improve consumer experiences. It is devoted to improving the way the world functions through technology, whether it be by changing the corporations on which the world depends or by giving you the tools and freedom to become the best version of yourself. The areas of expertise for Cognizant are consulting, ITO, BPO, and information technology. The three segments that makeup Cognizant's business are digital business, digital operations, and digital systems and technology.
In comparison to other MNCs offering Fresher Jobs in India, Cognizant provides prospective software engineers with a fantastic opportunity to study and forge a career path. Being employed here will provide you access to a range of cutting-edge technology and the chance to engage with clients from around the world, which will help you develop your skills, your capacity for problem-solving, and your sense of entrepreneurialism. At Cognizant, there are no limits to how you can influence the course of your career and the entire globe.
Cognizant Interview Questions - Table Of Content
It is an exam that is taken online on websites like AMCAT, etc.
The aptitude test, which has the following elements, is mandatory for applicants for the GENC profile:
The skill-based assessment test, which has the following sections, must be taken by applicants for the GENC PRO, GENC NEXT, and GENC ELEVATE profiles:
Section |
Topics |
Coding Challenge |
Coding Questions |
MCQ |
Conceptual and Code Analysis |
The following subjects will typically be covered in the questions
One of them will be chosen for GENC ELEVATE, GENC NEXT, or GEN PRO profiles based on how well they do in skill-based assessment exams and interviews. Candidates must have at least basic hands-on programming skills in order to be considered for the GenC Elevate assessment, and this need must be validated by the material submitted as part of the self-profiling procedure.
After passing the necessary cutoff on the skill-based assessment test/aptitude test, the candidates are selected for the technical interview phase.
The most important interview phase is the technical face-to-face interview round. You should be able to clearly explain computer science fundamentals to the interviewer, such as DBMS, OOPS, CN, and OS.
Knowledge of programming languages is necessary. Ensure that you are knowledgeable in at least one programming language. It is not necessary for you to be fluent in all programming languages, but you should have sufficient familiarity with at least one of them, such as C++, Java, or Python. You're likely to be asked to write a code on paper using a pen and paper. The interviewer will also test your ability to solve problems.
An extra benefit is having knowledge of current technical advancements. You ought to have a basic understanding of current technological trends like artificial intelligence (AI), big data, and so forth. You'll be questioned about your prior work, including what you accomplished, the technology you used, what you built, and your level of achievement, among other things.
You can also be asked questions about your CV and the company.
The candidates are called for the HR ROUND after passing the technical interview stage.
This is the most essential round of the interview process. A large number of in-tenders are turned down at this phase. The objective is to keep a friendly and assured demeanour. Remember to smile during interviews—they can be lengthy and boring!
The interview panel will quiz you on a variety of issues throughout the HR phase, including your personality, family history, education, interests, internships, and job experience (if applicable). Go ready to discuss the projects, internships, volunteer work, and extracurricular activities included on your CV. There may be inquiries about the business, such as what goods or services it provides, its guiding principles, when it was founded, how it is organised, etc.
When it comes to HR interview questions and possible answers, preparation is key. Making a list of the most common HR interview questions and practising your responses is the best thing you can do. These questions should have the solutions right at your fingers. When attending an interview, projecting confidence through your appearance and behaviour is another important consideration. Remember that you shouldn't exaggerate your confidence or tell lies. The difference can be enormous when one uses superb body language.
Interview Questions For Beginners And Experienced Employees At Cognizant
We can loop through each character in the string and count the characters until we reach the string's end to determine the length of a string without utilising string methods in C++. As an illustration, consider the following:
#include <iostream>
using namespace std;
int main() {
char str[100];
int length = 0;
cout << "Enter a string: ";
cin >> str;
for (int i = 0; str[i] != '\0'; i++) {
length++;
}
cout << "Length of the string is: " << length << endl;
return 0;
}
The "address of operator" (&) operator can be used to obtain any variable's address. This operator returns the variable's address.
#include <iostream>
using namespace std;
int main() {
int x = 5;
cout << "Address of x is: " << &x << endl;
return 0;
}
When items that are present in a heap are not used, there is a memory leak. The memory-cleaning garbage collector fails to delete it. As a result, these items are retained in memory needlessly.
Memory leaks are detrimental to the health of the application and can cause performance problems.
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A variable that contains the address of another variable is known as a pointer. It serves as an oblique reference to the variables. It enables the manipulation of the values.
Dangling pointers are those that are not initialised with an appropriate address. That happens during the phase of object annihilation. The pointer's address is not changed, but the object is erased from memory.
Mark and Sweep is the trash collection algorithm that is most frequently utilised.
The heap memory is where dynamically produced objects are kept. If objects are produced without being managed, the system will fail as the memory runs out.
A garbage collection algorithm is the Mark and Sweep algorithm. It operates in two stages.
The algorithm first finds any unnecessary items in the memory, and then, in the second stage, removes them from the memory to free up the unused space.
When a computer programme calls itself, recursion occurs.
The term "Data Definition Language" (DDL) is sometimes used. These statements are used to define or alter database objects.
The following are comprised of DDL.
The object is initialised using the Constructor. It is identical to the method. Constructor is used, whenever the class is instantiated. The memory needed for the object is allocated during instantiation.
Java has two different sorts of constructors.
The data is shielded from the outside world using it. Data is protected through encapsulation, which is accomplished by enclosing it within a single programme or function.
By making the data in an encapsulated class private in nature, the data is shielded from other classes.
An important element in how the OS boots up is the bootloader.
The boot manager is another name for it. The operating system is installed in the memory.
The name DML stands for data manipulation language. The database objects within the database are manipulated using these statements.
The following are comprised of DML.
An array is a group of related objects kept in a block of continuous memory. By using an index, it is possible to access the data kept in memory.
Large volumes of data are stored in the memory using arrays.
An int is a primitive type, but the Integer class is an Object. Whereas the int utilises two equal marks, ==, the integer is compared with. equals. While the int is not a class at all, the integer class is a wrapper for it.
A data type is the integer. It serves as a number representation.
An attribute of the data is a data type. It aids the machine in comprehending how it will use the information in the code.
import java.util.Scanner;
public class ReverseNumber {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Enter a number to reverse: ");
int num = sc.nextInt();
int rev = 0;
while (num != 0) {
int digit = num % 10;
rev = rev * 10 + digit;
num /= 10;
}
System.out.println("The reversed number is: " + rev);
sc.close();
}
}
import java.util.Scanner;
public class PowerOfNumber {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Enter the base number: ");
double base = sc.nextDouble();
System.out.print("Enter the exponent: ");
int exponent = sc.nextInt();
double result = Math.pow(base, exponent);
System.out.println(base + " raised to the power of " + exponent + " is " + result);
sc.close();
}
}
It can be described as having numerous constructors with various parameter settings so that each constructor can carry out a distinct function. These constructors in Java must have distinct signatures, and various sets of arguments must be supplied to the constructor for error-free compilation.
public class Person {
private String name;
private int age;
private String address;
public Person() {
// default constructor
}
public Person(String name) {
this.name = name;
}
public Person(String name, int age) {
this.name = name;
this.age = age;
}
public Person(String name, int age, String address) {
this.name = name;
this.age = age;
this.address = address;
}
}
It is a method that makes it possible for one object to take on all the traits and attributes of another object. The class that inherits is referred to as a derived class or subclass, whereas the class that uses inheritance is referred to as the base class or superclass.
It can be understood from a straightforward natural example: The son inherits all of his parents' traits and qualities.
With the parent object template, you can produce several objects.
A compiler examines a programme in its entirety. A code interpreter reads only one line at a time. Intermediate machine codes are created by the compilers. No intermediate machine codes are ever produced by the Interpreters.
Abstraction refers to keeping all extra information hidden from the user and just presenting what is required.
It is among the most crucial aspects of OOP.
No, in Java, a Constructor cannot be overridden. The constructor is similar to a method, but it doesn't operate in the same way as a Java method. The compiler will issue a compilation error if you attempt to call a constructor from a super class from a subclass.
Object-oriented programming is known as OOP. It involves writing code for procedures and functions. Reusing code while developing code in a simple manner is the goal.
OOPs follows:
Structured Query Language (SQL) goes by that name. It is the language utilised to manipulate databases. The SQL has several categories.
Having several forms is called polymorphism. Depending on the message or the event occuring, the program's object may behave differently.
The fact that a guy can play multiple roles, such as parent, son, or uncle, while remaining the same person, is an excellent illustration of polymorphism.
The objects created during class instantiation are destroyed using the destructor. It is a unique method that is invoked at the end of the object lifecycle. It has the ability to free up space by deleting the item from memory.
The destructor also terminates the database connections and releases any locks that the object may have been holding.
In Java, there are eight primitive data types. There are no more methods for these data types. Only the variable value's size and type are mentioned.
Memory allocation is handled by the malloc() method. The memory is dynamically allocated using this function.
A member function that is declared in the base class and overridden by the derived class is referred to as a virtual function. Runtime polymorphism can be achieved with the use of virtual functions.
Guidelines to follow when using virtual functions
Computer programmes can share hardware resources and operating systems (OS) thanks to the preemptive multitasking process. It allocates operational and computation time among processes while using predetermined criteria to swap resources between processes. Another name for proactive multitasking is time-shared multitasking.
To explore every node in a graph or tree, a technique known as depth first search or depth first traversal is utilised. The idea behind traversing is to view every node at once.
#include <iostream>
using namespace std;
template<int N>
struct PrintNumbers {
static void print() {
cout << N << " ";
PrintNumbers<N-1>::print();
}
};
template<>
struct PrintNumbers<0> {
static void print() {}
};
int main() {
PrintNumbers<100>::print();
return 0;
}
An non-linear data structure is a binary tree. Each node in the tree has data as well as left and right pointers. The root node is the highest node in the tree. Parent nodes are referred to as having sub-nodes, and leaf nodes are referred to as having no sub-nodes.
In the implementation of binary search trees, binary trees are used. They can be used to store records without taking up a lot of room.
A linked list is a linear collection of entries, comparable to an array. The pointer establishes the order of the components. The following entry in the collection is indicated by this pointer.
class Node {
int data;
Node left, right;
public Node(int data) {
this.data = data;
left = right = null;
}
}
class BinarySearchTree {
Node root;
public BinarySearchTree() {
root = null;
}
public void insert(int data) {
root = insertNode(root, data);
}
public Node insertNode(Node root, int data) {
if (root == null) {
root = new Node(data);
return root;
}
if (data < root.data)
root.left = insertNode(root.left, data);
else if (data > root.data)
root.right = insertNode(root.right, data);
return root;
}
public boolean search(int data) {
return searchNode(root, data);
}
public boolean searchNode(Node root, int data) {
if (root == null)
return false;
if (root.data == data)
return true;
if (data < root.data)
return searchNode(root.left, data);
else
return searchNode(root.right, data);
}
}
public class Main {
public static void main(String[] args) {
BinarySearchTree bst = new BinarySearchTree();
bst.insert(50);
bst.insert(30);
bst.insert(20);
bst.insert(40);
bst.insert(70);
bst.insert(60);
bst.insert(80);
if (bst.search(20))
System.out.println("20 found");
else
System.out.println("20 not found");
if (bst.search(10))
System.out.println("10 found");
else
System.out.println("10 not found");
}
}
One of the most significant data structures is it. Each queue adheres to the principle of first in, first out. It implies that the first element to be removed is the one that was entered. Around the bottom end, the elements are added, and the top end is where they are removed.
An illustration of a queue is the line for movie tickets.
It is a more complex form of a basic linked list. A doubly-linked list allows for forward and backward movement. In contrast to a straightforward linked list, it also stores the previous pointer.
The index is utilised to enhance and boost the database's performance. It is a type of data structure used to easily access and find data in databases.
The database index functions similarly to how the index in the book does.
Real Application Cluster is referred to as RAC. It was introduced by Oracle to offer the databases high availability and clustering. A database cluster is made up of more than two nodes and ensures continuous database availability even if one or more nodes fail.
int a = 10;
int b = 20;
a = a + b;
b = a - b;
a = a - b;
System.out.println("a: " + a); // Output: a: 20
System.out.println("b: " + b); // Output: b: 10
The recursive method for reversing a linked list is straightforward; all we need to do is break the linked list into two sections, the first node and the remaining linked list, and then call recursion on one of the sections while keeping the connection.
When the database node starts acting like an independent database, split brain syndrome occurs. Data loss and corruption may result from this.
An voting disc is utilised to avoid split brain syndrome.
The Oracle Database goes through the NOMOUNT, MOUNT, and OPEN phases before starting an instance. You can manage the database instance's stage using the STARTUP command.
It is a linear data structure that resembles a queue but applies the last one to leave first rule. The last-inserted components are initially removed. The methods for a stack are pop() and push ().
A stack looks like a pail of garments.
A stack is a kind of linear data structure that is represented by a group of objects that have been set up in a specific order. Data values that are related to one another and referred to as elements make up an array.
#include <iostream>
using namespace std;
int main() {
char str[] = "Hello, world!"; // sample string
int len = 0; // variable to store the length of the string
// iterate through the characters of the string until null character is reached
while (str[len] != '\0') {
len++;
}
cout << "Length of string: " << len << endl;
return 0;
}
It is a non-linear data structure with connections tying items together. These objects are known as vertices, and the connections between them are known as edges.
In the graphs, it doesn't matter how long the relationships are.
The functions push() and pop() are used to add and delete elements from the stack, respectively. To keep track of the components at the top of the stack, utilise the top.
Finding the shortest path to complete any task is a challenge. The points reflect the various cities that a salesperson visits. The salesperson strives to travel as little as possible while keeping travel expenses to a minimum.
public class BubbleSort {
public static void main(String[] args) {
int[] arr = {5, 3, 8, 4, 2};
// Printing unsorted array
System.out.println("Unsorted Array:");
for (int i : arr) {
System.out.print(i + " ");
}
System.out.println();
// Sorting array using bubble sort
for (int i = 0; i < arr.length - 1; i++) {
for (int j = 0; j < arr.length - i - 1; j++) {
if (arr[j] > arr[j + 1]) {
int temp = arr[j];
arr[j] = arr[j + 1];
arr[j + 1] = temp;
}
}
}
// Printing sorted array
System.out.println("Sorted Array:");
for (int i : arr) {
System.out.print(i + " ");
}
}
}
Divide and conquer is an algorithm that applies to merge sort. The issue is divided into more manageable issues of the same kind until they can be resolved.
The answer to the subproblem is then added to the answer to the main problem.
Merge sort has an O(n* log n) time complexity.
The fill factor indicates how much room will be given over to data on each leaf-level page. The page, which is made up of 8K pages, is the smallest unit in SQL Server. The size of the rows determines how many rows fit on each page.
Fill Factor's default setting is 100, which is equivalent to the number zero. When the Fill Factor is set to 100 or 0, SQL Server will insert as many rows as it can into an index's leaf-level pages. When the fill factor is 100, there won't be any or very little white space on the page.
In competitive programming, where overlapping methods are employed, it is a widely utilised technique. The major difficulty is broken down into smaller difficulties so that the solutions can be employed in other situations.
A temporary storage space (also known as a cache) is used to store many copies of the most frequently used data in order to facilitate faster access to them. For software programmes, servers, and web browsers, it maintains data in a temporary format so users don't need to download data each time they access a website or use an application.
Data that has been cached is saved in a device's memory for later access. The memory of a computer, which is situated beneath the central processor unit, is where the data is kept (CPU). The primary cache level and two additional secondary cache levels that feed the primary level are built into the microprocessor chip of a device. The device's disc or hard drive cache is filled up or the content's time to live (TTL), which establishes how long it should be cached, expires before the information is deleted.
Data is typically cached using one of two methods: content delivery or browser or memory caching (data kept locally on the machine).
Particularly if you're a fresher, going through the recruitment process can be intimidating and mentally taxing. Here are some suggestions to help you manage your stress:
Being creative is the best approach to ace a cognizant interview. This is true for every stream, regardless of the one for which you are being interviewed. Face-to-face interviews are conducted to assess your potential, creativity, and value to the organisation. The primary responsibility of the interviewing panel is to identify the greatest personnel for the business.
This important question measures your level of confidence. You should be optimistic as you respond to this question. Mention your strengths that are appropriate for the workplace. A possible response is:
I think I'm a good fit for this position because I usually take on difficulties in projects. I can do successfully because this work requires me to deal with people under pressure.
Cognizant conducts their interview process in two different ways: on-campus recruitment and off-campus recruitment. The interview consists of three rounds. Aptitude, programming, and HR rounds are some of them.
Interviews at cognizant are not particularly challenging. You do, however, need to be ready. You might need to talk about a particular technical project individually if you mentioned it in your resume.
They must be proficient programmers in at least one language or framework, such as C, C++, Java,.NET, or Perl, as well as possess strong analytical and problem-solving abilities.
I choose cognizant because I can learn whatever I need to know for my profession to the maximum extent at this environmentally friendly organisation. I can also demonstrate my skills and fervent interest in the position. cognizant, in my opinion, would be the best environment for me to grow and establish myself.
One of the finest methods to enter Cognizant if you are a recent graduate searching for an entry-level position is through university recruitments. You would have to pass a test, followed by several rounds of interviews.
Please keep an eye out for job openings on the firm website and other job portals if you have experience and are seeking a position requiring a certain set of skills. You'll need to submit an application for the position and advance through the interview process.
The difficulty of an interview depends on how much preparation you put in. It will be simpler for you to ace the interview the more you prepare. The foundations of modern technologies, programming languages, your projects, and Cognizant are all that are required of you. Along with technical knowledge, interviewers are interested in how candidates approach challenges, organise their thoughts, and demonstrate interpersonal skills like communication. You can use this list as an excellent starting point for your Cognizant interview preperation.
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Madhuri is a Senior Content Creator at MindMajix. She has written about a range of different topics on various technologies, which include, Splunk, Tensorflow, Selenium, and CEH. She spends most of her time researching on technology, and startups. Connect with her via LinkedIn and Twitter .
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