10+ Synechron Technical Lead Interview Questions and Answers

Technical Lead interview questions on COBOL, DB2, and CICS

• Types of call in COBOL

• File status 39 indicates end-of-file reached

• AICA is Abend-AID CICS Abend RSN (Reason) Code

• Cursor is used to fetch rows from DB2 tables sequentially

• Compiler options include OPTIMIZE, DEBUG, and LIST

• BIND utility is used to bind DB2 programs to database

• Dynamic VSAM file reading can be done using READNEXT function

• -911 SQLCODE indicates deadlock or timeout error

• Research organization before interview

• Int...read more

Microservices are a software architecture pattern where applications are built as a collection of small, loosely coupled services.

• Microservices allow for modular development and deployment of applications.

• Each microservice can be developed, deployed, and scaled independently.

• Microservices communicate with each other through APIs.

• They promote flexibility, scalability, and fault tolerance.

• Examples of microservices include Netflix, Amazon, and Uber.

Extract data source is a static snapshot while live data source is real-time data. Data blending combines data from multiple sources.

• Extract data source is a subset of data from a larger data source that is saved as a static snapshot.

• Live data source is real-time data that is directly connected to the source system.

• Data blending combines data from multiple sources to create a unified view.

• Extract data source is faster for large datasets while live data source provides real-ti...read more

Javascript program solving techniques and real-time examples using Angular frameworks.

• Use modular programming to break down complex problems into smaller, more manageable parts.

• Use debugging tools to identify and fix errors in code.

• Use event-driven programming to create responsive and interactive user interfaces.

• Use data binding to keep the view and model in sync.

• Examples: Creating a real-time chat application using Angular's WebSocket API, implementing a real-time stock tick...read more

Data warehouse is a central repository of data used for reporting and analysis.

• Data is extracted from various sources and transformed to fit into the warehouse schema.

• Data is organized into dimensions and facts for efficient querying.

• Used for business intelligence and decision-making.

• In my current project, we use a data warehouse to store and analyze customer behavior data.

• We extract data from our website, mobile app, and CRM system and transform it to fit into our warehouse ...read more

To check production issues at the app level, one can use logging, monitoring tools, error tracking services, and user feedback.

• Utilize logging to track errors and events in the application

• Implement monitoring tools to keep track of performance metrics and system health

• Use error tracking services like Sentry or Rollbar to receive real-time notifications of issues

• Collect user feedback through surveys or support tickets to identify and prioritize issues

Hashmap and hashset are data structures used to store and retrieve data efficiently.

• Hashmap uses key-value pairs to store data and allows null values for both keys and values.

• Hashset stores unique values and does not allow duplicates.

• Both use hashing to locate and retrieve data quickly.

• Hashmap is implemented using a hash table while hashset is implemented using a hash map.

Dependency injection is a design pattern that allows objects to be passed as dependencies rather than being created within a class.

• Types of dependency injection include constructor injection, setter injection, and interface injection.

• Constructor injection involves passing dependencies through a class's constructor.

• Setter injection involves passing dependencies through a class's setter methods.

• Interface injection involves implementing an interface that defines the necessary de...read more

Type in TypeScript refers to the static type of a variable, function, or object.

• Type in TypeScript helps catch errors at compile time by specifying the data type of variables.

• Types in TypeScript include basic types like number, string, boolean, as well as custom types like interfaces and enums.

• Example: let age: number = 25;

An interceptor is a middleware component that intercepts incoming and outgoing HTTP requests in an application.

• Interceptors can be used for logging, authentication, error handling, and modifying requests/responses.

• In Angular, interceptors can be used to modify HTTP requests before they are sent to the server.

• In Spring framework, interceptors can be used to intercept client requests and server responses.

• Interceptors are commonly used in web development to add cross-cutting con...read more