Cognizant Program Analyst Interview Questions and Answers

One new technology I know about is blockchain, a decentralized and secure way to store and transfer data.

• Blockchain is a distributed ledger technology that securely records transactions across multiple computers.

• It is most commonly known for being the technology behind cryptocurrencies like Bitcoin.

• Blockchain has applications beyond finance, such as supply chain management, voting systems, and healthcare records.

• S...read more

A simple Python program can perform basic tasks like calculations, data manipulation, or file handling.

• Use 'print()' to display output. Example: print('Hello, World!')

• Define functions with 'def'. Example: def add(a, b): return a + b

• Utilize lists for data storage. Example: my_list = [1, 2, 3]

• Implement loops for iteration. Example: for i in range(5): print(i)

• Use conditionals for decision-making. Example: if a > b...read more

For loop is used for iterating over a sequence while while loop is used for executing a block of code repeatedly.

• For loop is used when the number of iterations is known beforehand

• While loop is used when the number of iterations is not known beforehand

• For loop is faster than while loop for iterating over a sequence

• While loop is useful for creating an infinite loop until a certain condition is met

An abstract class is a class that cannot be instantiated and is used as a base class for other classes.

• An abstract class can have abstract and non-abstract methods.

• Abstract methods have no implementation and must be implemented by the derived classes.

• An abstract class can have constructors and fields.

• An example of an abstract class is the Shape class, where the methods like area() and perimeter() are abstract and ...read more

Paging and Segmentation are memory management techniques used by operating systems.

• Paging divides memory into fixed-size pages and stores them in physical memory.

• Segmentation divides memory into logical segments and stores them in physical memory.

• Both techniques allow for efficient use of memory and protection of memory from unauthorized access.

• Examples of operating systems that use paging and segmentation include...read more

Critical section is a part of code that must not be executed by more than one thread at a time.

• It is used in multi-threaded programming to avoid race conditions.

• It is usually protected by locks or semaphores.

• Examples include updating shared variables or accessing shared resources.

• It is important for ensuring data consistency and preventing deadlocks.