Cognizant Software Engineer Interview Questions and Answers for Experienced

Effective backups are crucial for data integrity and recovery in software engineering.

• Regularly schedule backups to prevent data loss, e.g., daily incremental backups.

• Use versioning to keep multiple copies of files, allowing recovery from different points in time.

• Implement offsite backups to protect against physical disasters, such as using cloud storage.

• Test backup restoration processes periodically to ensure dat...read more

BR in ServiceNow stands for Business Rule.

• BR is a type of automation that executes when a record is inserted, updated, deleted, displayed, or queried.

• BRs are used to enforce business logic, data integrity, and automate processes.

• Examples of BRs include sending email notifications when a record is updated, enforcing data validation rules, and triggering workflows.

Types of subfiles include single page subfile, multiple page subfile, and continuous subfile.

• Single page subfile displays a single page of data at a time.

• Multiple page subfile allows for paging through multiple pages of data.

• Continuous subfile displays all records at once with no paging.

Procedures do not return values while functions return values.

• Procedures are a set of instructions that perform a specific task without returning a value.

• Functions are a set of instructions that perform a specific task and return a value.

• Procedures are called using the CALL statement in SQL.

• Functions are called by using their name followed by parentheses containing any arguments.

A sequence is a ordered list of elements or events following a specific pattern or order.

• A sequence can be in ascending or descending order.

• Examples include Fibonacci sequence, arithmetic progression, and DNA sequence.

• Sequences can be finite or infinite.

Java 8 introduced features like lambda expressions, functional interfaces, streams, and default methods.

• Lambda expressions allow you to write code in a more concise way.

• Functional interfaces can have only one abstract method and are used with lambda expressions.

• Streams provide a way to work with sequences of elements.

• Default methods allow interfaces to have method implementations.

• Example: Lambda expression - (int ...read more