Cognizant big data interview questions

A push method denotes data being added to it, meaning information is being "pushed" in the stack. A stack base on LIFO pattern.

It means that data access follows a sequential process wherein the last data to be entered when the first one deleted. Arrays do not follow a particular order and instead can access by referring to the indexed element within the array. Doubly linked lists are a particular part of linked list wherein traversal across the data elements can be done in any directions. This is possible by having two links in every node, one that connects to the next node and another one that links to the previous node.

A Queue is a data structure which is linear and follows a fixed order in which the operations occur. An excellent example of a queue is any queue of the customer for a resource where the customer that came first served first. The difference between stacks and queues is while deleting. Basic features of Stack are an ordered list of the similar data type. The interconnection of objects are represented by points termed as vertices, and the links that connect the vertices are called edges.

A priority queue is an abstracted data type which is like a queue or stack data structure, but where additionally each element has a "priority" associated with it. In a priority queue, an element with high priority is served before an element with low priority. JavaTpoint offers too many high quality services. Mail us on [email protected] , to get more information about given services. Please mail your requirement at [email protected] Duration: 1 week to 2 week.

All Interview. Cognizant Interview Questions Cognizant is a multinational corporation that provides IT services to different organizations, including digital technology, consulting, operations and all kind of services. It offers the unique learning and work environment with their great learning materials. Cognizant has many branches in all over the India as well as outside India. Cognizant recruits its employees in two ways: 1.

Answer: a Solution: Let the numbers be x and x. Answer: c Solution: Let the numbers be x and 4x. Answer: a Solution: 0. Answer: b Solution: 5! Answer: d Solution: In the unit's place, starting with 4, Answer: a Solution: The time at which they will meet again at the starting point will be the LCM of , and second.

Answer: c. Answer: a Solution: If Plant B at 6th position then option "b" and "c" cannot satisfy Option "d" is not satisfying because plant C should cover position 3, and option "e" is wrong also because plant E never come before plant A. Answer: a Solution: Manor often comes to me on Sundays.

Answer: a Solution: Sham had just finished the poem then. Answer: a Solution: Move two letter backward Answer: a Solution: Atul's daughter's mother - Atul's wife; Atul's wife's father - Atul's father-in-law; Father-in-law's son - Atul's brother-in-law. Reinforcement Learning. R Programming. React Native. Python Design Patterns. Python Pillow. Python Turtle.

Verbal Ability. Interview Questions. Company Questions. Artificial Intelligence. Cloud Computing. Data Science. Angular 7. Machine Learning. Data Structures. Operating System. Computer Network. Compiler Design. Computer Organization. Discrete Mathematics. Ethical Hacking. Computer Graphics. Software Engineering.

Web Technology. Cyber Security. C Programming. Control System. Data Mining. Data Warehouse. Javatpoint Services JavaTpoint offers too many high quality services. M of 2 numbers is , and the H. If the sum of these numbers is , then their difference is, 10 46 70 90 Show Answer Answer: a Solution: Let the numbers be x and x.

F and L. M of two numbers are 84 and 21 respectively. If the ratio of the two numbers is , then the larger of the two numbers is 12 48 84 Show Answer Answer: c Solution: Let the numbers be x and 4x. P is greater than In how much time will it amount to eight times itself? The entire distance covered by her is 92km, and the entire journey took her 1 hour. Find the distance between the bus station from where she boards the bus and her office. What is the length of the second train?

How many women will it take to finish the same job in 10days working 6 hours a day? What is the sum of their reciprocals? A completes a circle in seconds, B in second and C in seconds. After what time will they cross again at the same point? What is the sum of the numbers? What are the Original numbers? Cognizant Verbal Ability Questions Analogies: 1 slur : speech : : smudge :?

Show Answer Answer: Writing. Show Answer Answer: Finger. Show Answer Answer: Identical. Two plates chicken 9 The succeeding is the batch of questions base on a paragraph or a set of conditions for each issue. Select the best answer choice given. Which describes a correct combination of sapling and row? How many mins does the watch gain per day? It then turns right and then runs for another 35 km and then takes the direction back to reach the road.

In the meantime, due to a significant break down the other car has run only 40 km along the way. What would be the distance between two vehicles at this point? After walking 2 km, he turns to the left and walks 7 km. And then he goes back 3 km straight. Now in which direction is he from the starting place? Define it. When there is a space area in a heap, but no variable is in the stack pointing to that memory.

Size of it is 2 Byte or 4 Byte. This symbol shows the ending of the string. Embedded C is the extension of C programming language. Embedded C is used to develop microcontroller-based applications. Structured oriented programming language - In this type of language, large codes fragmented into small programs called functions. Modifiers derive the space to allocate for a variable. Whereas, variable definition allocates memory to the variable Variable can be declared many times in a program.

A class that inherits data from a base class is called a subclass or derived class 8 What is the constructor? Yes, because it also handles the data in a structured way. Cognizant Programming Questions 1 Write a program to reverse any number. Hence these objects are kept in the memory unnecessarily. Memory leaks can lead to performance issues and are bad for the application's health. Objects are that dynamically created are stored in the heap memory. If objects are created without management, the memory will exhaust, crashing the system.

In the first phase, the algorithm detects the unused objects in the memory, while in the second phase, these objects are removed from the memory to reclaim the wasted space. Pointers that are not initialised with a valid address are called dangling pointers. It occurs during the object destruction phase. The object is destroyed from memory, but the pointer's address is not changed. Recursion happens when a program calls itself. A data type is characteristic of the data. It helps the machine understand how the machine will use the data in the code.

The malloc function is used for memory allocation. This function is used to allocate the memory dynamically. The array is a collection of similar elements stored in the continuous memory block. The data stored in the memory can be accessed by index.

Arrays are used to store large amounts of data in the memory. There are eight primitive data types in Java. These data types have no additional methods.

It only mentions the size and type of the variable value. The bootloader is an essential component in the booting process of the OS. It is also called the boot manager. It places the Operating System in the memory. Although it is slower to analyse the program. But the overall execution time of the compiler is faster than the interpreter. It is about writing code in functions and procedures. The idea is about writing code in a minimalistic way that reuses code.

The OOP follows. Abstraction means only displaying what is necessary while hiding all the unnecessary data and implementation from the end-user. It is a mechanism that allows one object to acquire all the characteristics and properties of another object.

A class used for inheritance is called the base class or superclass, while the class that inherits is called a derived class or subclass. It can be understood from a simple natural example - The son inherits all the properties and characteristics of his parents. It is used to protect the data from the outside world. Encapsulation means shielding the data, it is done by wrapping it under a single program or function. The data in an encapsulated class is hidden from other classes by making the data private in nature.

Polymorphism means taking multiple forms. The object in the program can act in different ways depending on the message or the event occurring. A very good example of polymorphism is that a man can have different roles like father, son, or uncle yet he is the same person. The constructor is used to initialise the object.

It is similar to the method. Every time a class is instantiated constructor is used for it. During the instantiation, the memory required for the object is allocated. There are 2 types of constructors in Java. Destructor is used to destroy the objects that are created while the class was instantiated. It is a special method that gets called when the object lifecycle comes to an end. It can remove the object from the memory and reclaim the space. No, you cannot override a constructor in Java.

The constructor is similar to a method by it does not work like the java method. It can be defined as having multiple constructors with different parameters so that every constructor can perform a different activity. In Java these constructors must have unique signatures and for error-free compilation different set of arguments must be passed to the constructor.

A virtual function is a member function that is declared in the base class and it is overrriden by the derived class. Virtual function helps in achieving runtime polymorphism. DML is also known as Data manipulation language. These statements are used to manipulate the database objects inside the database. Following are included in DML.

These statements are used to define or modify objects in the database. Follwing are included in DDL. It is the language used to manipulate the database. The SQL includes various categories.

Linked List is similar to an array; it is a collection of elements in a linear fashion. The order of the elements is determined by the pointer. This pointer points to the next element in the collection. Iterate through the linked list. In a loop, do the following. It is one of the most important data structures.

Any queue follows the first in first out method. It means that the element that is inserted first gets removed first. The elements are inserted near the bottom end and deletion is done at the top end. It is an advanced version of a simple Linked List. One can traverse forward and backwards using a doubly-linked list.

Unlike a simple linked list, it stores the previous pointer as well. Push is used to insert the elements in the stack, while pop is used to remove the elements from the stack. The top is used to keep a track of elements at the top of the stack.

It is a non-linear data structure where elements are connected by links. These elements are termed vertices and the links are called edges. The length of the links does not matter in the graphs. A stack based on the LIFO principle. The sequential process of accessing data means that the last data is entered after the first has been erased.

In an array, there is no particular order and each element can be accessed by inspecting its index. It is a linear data structure; it is similar to queue but follows the Last in First Out principle. The elements that are inserted last are removed first. Stack has two methods - pop and push. A bucket of clothes resembles a stack.

A binary tree is a non-linear data structure. Every node in the tree has left and right pointers along with data. The topmost node is known as the root node. The nodes that have sub-nodes is called parent node and nodes that do not have any sub-nodes are known as leaf node. Binary trees are used in Binary search tree implementation.

They are useful in storing records without taking up much space. It is a technique widely used in competitive programming where overlapping methods are used. The main problem is divided into smaller problems so that the results generated from solving them can be reused again.

It is a problem to find the shortest route for completing any job. During a salesperson's visit, the points represent the different cities. The salesman aims to keep travel costs low, as well as distance, travelled as low as possible. Merge Sort falls under the divide and conquer algorithm. The problem is broken down into smaller problems of the same type until they are solvable.

The solution to the subproblem is then combined to provide the solution for the initial problem. It is one of the classic sorting algorithms. The idea is to swap the adjacent elements if they are in the wrong order. The preemptive multitasking process allows computer programs to pool operating systems OS and hardware resources. It uses established criteria to switch resources between processes and distributes operating and computing time among processes. Preemptive multitasking is also known as time-shared multitasking.

Oracle introduced it to provide high availability and clustering for the databases. Split brain syndrome happens when the database node starts behaving like an independent database. This can cause corruption and data loss. To prevent split brain syndrome, a voting disk is used. An algorithm called Depth first search or Depth first traversal is used to search all the nodes in a graph or tree.

The concept of traversing is to see all nodes at once. Index is used to optimize and improve the performance of the database. It is a data structure used to access and quickly locate the data in the database.

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