Virtusa Interview Questions and Answers
Virtusa Corporation is a global provider of digital engineering, digital business transformation, and IT outsourcing services. Virtusa hires skilled and certified candidates from all over the world and here are the frequently asked Virtusa interview questions and answers for aspirants.
Virtusa Interview Process
You can apply for Virtusa jobs through the following channels:
- Via Virtusa Careers: Virtusa’s direct application channel for jobs is available on their website. It’s easy: Look for the position you want, taking into account your desired location and skill set.
- Campus Placements: Virtusa visits a select few colleges and universities, including DTU, IIT, and NIT, as part of its college placement programs.
- Referrals: Increase your connections on social media platforms like LinkedIn, build a rapport with a Virtusa staff member, and accelerate the application procedure.
These four rounds typically make up Virtusa’s selection procedure.
- Written Test: Candidates are evaluated on 40–42 items, comprising 2 easy–to–medium level coding exercises and 38–40 multiple-choice questions centered around computer science concepts.
- Technical Interview: You’ll be asked questions regarding your background in software development, projects, object-oriented programming (OOP), Java, simple SQL queries, and your resume.
- Group Discussion: At this stage, interviewers evaluate candidates’ capacity for teamwork, communication, leadership, and persuasion.
- Personal Interview: This round of questions will be general in nature, and the offer will be made.
Virtusa Interview Questions and Answers for Freshers – Technical
1. Describe Abstraction.
The feature of Java called Data Abstraction allows the user to see only the most important information.
2. What does encapsulation mean?
Encapsulation, which in Java refers to the grouping of data and methods that alter that data into a single unit known as a class, is a fundamental concept in object-oriented programming (OOP).
3. Define view.
In SQL, views are a type of virtual table. Rows and columns in a view are identical to those in an actual database table. By choosing fields from one or more database tables, we can create a view. A view may contain every row in a table or just certain rows determined by predefined criteria.
4. How do void pointers work?
A pointer without a corresponding data type is called a void pointer. Any type of address can be stored in a void pointer, and it can be typecast to any type.
5. Define a copy constructor.
An object of the same class is used by a member function called a copy constructor to initialize another object. To put it simply, a copy constructor is a constructor that uses an already-generated object of the same class as its initialization when building an object.
6. Describe a virtual function.
Member functions that are declared inside base classes and redefined (overridden) with derived classes are referred to as virtual functions, also called virtual methods.
7. Define a transaction.
A collection of database actions known as a database transaction must be handled as a whole, meaning that either every operation is carried out or not. A bank transaction from one account to another can serve as an illustration. It is necessary to do either all of the credit and debit operations or none of them.
8. Explain access specifiers.
Special keywords called “access specifiers” are used to define or regulate an entity’s accessibility, such as that of classes, methods, and so forth. Access modifiers or specifiers include things like Private, Public, and Protected.
Encapsulation and data hiding, two essential elements of OOPs, are mostly accomplished via these access specifiers.
9. What qualities do ACIDs have?
A collection of characteristics known as ACID (Atomicity, Consistency, Isolation, Durability) ensures the dependable processing of database transactions.
10. Describe data warehousing.
A data warehouse is distinct from a database management system (DBMS). It houses enormous volumes of data that are usually gathered from several heterogeneous sources, such as files, DBMSs, etc.
Virtusa Interview Questions and Answers for Experienced – Technical
11. Decode a string that is encoded as a count that follows a substring recursively.
Utilizing two stacks. One for letters and another for integers is the plan.
Proceed to traverse the string.
- Put any number we come across into the integer stack, and any letter (a to z) or open bracket (‘[‘) should go into the character stack.
- Pop the character from the character stack if a close bracket (‘]’) is detected, and continue doing so until the character stack contains no more open brackets (‘[‘). Pop the top element, let’s say n, from the integer stack as well. The popped character should now be repeated n times in a string. Proceed to push every character in the string into the stack.
12. Reverse a Linked List
To solve the issue, take the following actions:
Set up three-pointers first. curr as head, next as NULL, and prev as NULL.
Go through the linked list iteratively. Repeat the following in a loop:
Store the next node before altering the next of curr.
next = curr -> next
Update the following curr pointer to the previous
curr -> next = prev
Update the following curr pointer to the previous
prev = curr
curr = next
13. Sort an array of 0s, 1s and 2s
The problem is comparable to resolving.
Three colors were used to pose the dilemma in this case: 0′, 1′, and 2′. There are four sections to the array:
arr[1] to arr[low – 1]
arr[low] to arr[mid – 1]
arr[mid] to arr[high – 1]
arr[high] to arr[n]
Change the element to the low range if the ith element is 0.
In a similar vein, leave it alone if the element is 1.
Replace the element with one from the high range if it is 2.
14. Return the missing number from an array called num that contains n distinct numbers in the range [0, n].
Example: [0,6,8,5,1,2,3,4] 7 is the missing number.
This difficulty can be resolved with the aid of a hash table that records numbers between 0 and n. And we will return any number that remains after marking for marking. However, this requires more room. Therefore, we can use mathematics to calculate the sum of numbers from an array to the actual sum that must exist from (1 – n) to optimize this. Thus, the code fix will be:
public int missingNumber(int[] nums) {
int sumArray = 0;
int n = nums.length;
for(int i = 0; i<n; i++)
sumArray += nums[i];
int ActualSum = (n*n + n)/2;
return ActualSum – sumArray;
}
15. Two non-empty linked lists representing non-negative integers are provided to you. Every list has a single digit at each node, arranged in the least important digit’s reverse order. To retrieve the total as a linked list, add the two numbers.
class Solution {
private int val = 0;
private int carry = 0;
private ListNode reverse(ListNode head){
if(head == null || head.next == null)
return head;
ListNode t = reverse(head.next);
head.next.next = head;
head.next = null;
return t;
}
private ListNode addNumber(ListNode l1, ListNode l2){
if(l1 == null && l2 != null){
val = l2.val + carry;
carry = val/10;
ListNode n = new ListNode((val%10), addNumber(l1, l2.next));
return n;
}
else if(l1 != null && l2 == null){
val = l1.val + carry;
carry = val/10;
ListNode n = new ListNode((val%10), addNumber(l1.next, l2));
return n;
}
else if(l1 != null && l2 != null){
val = l1.val + l2.val + carry;
carry = val/10;
ListNode n = new ListNode((val%10), addNumber(l1.next, l2.next));
return n;
}
else{
if(carry != 0)
return new ListNode(carry);
return null;
}
}
public ListNode addTwoNumbers(ListNode l1, ListNode l2) {
l1 = reverse(l1);
l2 = reverse(l2);
l1 = addNumber(l1, l2);
return reverse(l1);
}
}
16. Construct a program that reverses x’s digits so that the result falls inside the bounds of a signed 32-bit integer. Return 0 if reversing x makes the value jump outside of the range.
Example:
54678 is the input. 87645 is the output.
2147483647 is the input. Because reversing it goes out of bounds to an integer, the output is 0.
The integer data type does not allow us to store the maximum integer because we also need to store it. as it crosses the boundary. Thus, we can employ easily recognized data types, either long or short. The char data type will be used in this solution to do that. This is the answer to that, then.
public int reverse(int x) {
char [] ans = Integer.toString(x).toCharArray();
int maxAllowedPos = 2147483647;
int maxAllowedNeg = -2147483648;
if(x > 0){
int i = 0, j = ans.length-1;
while(i < j){
char c = ans[i];
ans[i++] = ans[j];
ans[j–] = c;
}
String an = new String(ans);
double t = Double.parseDouble(an);
if(t > maxAllowedPos)
return 0;
return (int)t;
}else{
int i = 1, j = ans.length-1;
while(i < j){
char c = ans[i];
ans[i++] = ans[j];
ans[j–] = c;
}
String an = new String(ans);
double d = Double.parseDouble(an);
if(d < maxAllowedNeg)
return 0;
return (int)d;
}
}
17. Create a program that will return true if any element in the array nums appears at least twice. Return false if each element is unique.
By leaving the element in the hash map, we can find a solution to this issue. Furthermore, we must return true if any of the items seem to already exist. And HashMap assists us in doing so in this case.
public boolean containsDuplicate(int[] arr) {
int n = arr.length;
if(n == 1){return false;
HashSet<Integer> set = new HashSet<>();
for(int i =0; i<n; i++)
{
if(set.contains(arr[i])){return true;}
set.add(arr[i]);
}
return false;
}
18. Find out if a binary tree is a BST, given its root. Next, ascertain if it is a legitimate BST. A binary search tree (BST) is a tree whose subtrees are binary search trees in both cases, as well as BSTs in each node’s subtrees.
With recursion, we can solve this problem with ease. All we have to do is make sure that each subtree is a binary search tree. Thus, this is how recursion is used to approach the solution.
class Solution {
private boolean solution(TreeNode root, long left, long right){
if(root == null)
return true;
if(!(root.val < right && root.val > left))
return false;
return ((solution(root.left, left, root.val)) &&
(solution(root.right, root.val, right)));
}
public boolean isValidBST(TreeNode root) {
return solution(root, Long.MIN_VALUE, Long.MAX_VALUE);
}
}
19. Implement a binary search with Java.
public boolean binarySearch(int[] arr, int low, int high, key){
if(low > high)
return false;
int mid = (low+high)/2
if(arr[mid] == key)
return true
else if(arr[mid] < key)
return binarySearch(arr, mid+1, high, key);
else
return binarySearch(arr, low, mid-1, key);
}
20. When should a function throw an exception?
The keywords try and catch are used to manage exceptions.
- However, we can use the keyword throw in the method declaration if we don’t want to handle the exception in the method on which the exception may arise.
- The method that is calling this one must have handled the exception, according to this.
Example:
- Think of a procedure that takes two integers, divides them, and outputs the outcome.
- Thus, the procedure will raise an exception if the caller function returns 0 in the argument.
- Therefore, we can use the throw keyword to declare the add method in this instance, indicating that it may throw an exception.
- You must deal with it if you are the one making the call.
21. Assuming the array is initially positioned in that direction, rotate it by k degrees to the right. For that, create a program.
public int[] rotate(int[] nums, int k) {
int n = nums.length;
if(n == 1)
return;
if(k > n)
k = k%n;
int i = n-k, j = 0;
int [] auxArray = new int[k];
while(i < n){
auxArray[j++] = nums[i++];
}
i = n-1;
while(i >= k){
nums[i] = nums[i-k];
i–;
}
return auArray;
}
Common Virtusa Interview Questions and Answers
22. Why should we hire you?
Above all, you must convince your prospective employer that you are the best applicant for the job. In your response, please be specific, helpful, and describe how you can support the company’s objectives. It would help if you didn’t answer in a general or ambiguous manner, but neither can it be a plug for your abilities.
Sayings like “I want to join the company because it seems like a great place to work” or “I would love to work here because the company is amazing” should be avoided. Instead, discuss your reasons for supporting the organization and how you might help it achieve its objectives.
23. What benefits will you bring to the company?
A wonderful opportunity to demonstrate how you fit within the company’s culture is during an HR interview. Be ready to talk about the company’s culture and how you can fit in. You may also discuss the ways in which the organization or industry has benefited from your prior employment experience.
If you are looking for a job at a company, for example, you can explain how your prior experience at a startup aligns with your qualifications for the role.
24. Please assess my interviewing skills on a scale of one to ten.
Candidates frequently think that they would have a better chance of getting employed if they received a score of 10 out of 10. That being said, this is untrue. Interviewers aim to ascertain a candidate’s diplomatic qualities through their questions. However, you must respond to this.
There are a lot of possible responses there, but one of the greatest would be, “My opinion is that I am not the right person to judge you.” You are here because you possess the best attributes. Still, it is a pleasure to speak with you.
25. What are your strengths?
A candidate is distinguished from the others by certain attributes; yours are the qualities that make you the most qualified applicant for the position. This is a possible question to ask the interviewer to see if your qualifications match their needs for a hire.
Strengths are the attributes you have or have demonstrated in the past that make you a highly qualified candidate for the position. They can differ in terms of personality, inventiveness, and work ethics.
Prepare to discuss your prior experiences while concentrating on your strong points. Don’t only list clichéd qualities like “I work well with others” or “I’m always eager to learn new things.” What distinguishes you from the other applicants?
Conclusion
These Virtusa interview questions and answers will be updated frequently. Get in touch to update your skills according to the requirements of top companies through our placement training institute in Chennai.
