Visa Interview Questions, Process, and Tips

IDS and IPS are security systems that monitor network traffic for malicious activity and prevent attacks.

• IDS (Intrusion Detection System) detects and alerts about potential attacks by analyzing network traffic and comparing it to known attack patterns.

• IPS (Intrusion Prevention System) goes a step further by actively blocking malicious traffic and preventing attacks from happening.

• Both systems use a combination of signa...read more

Microkernel is a minimalistic approach where only essential services are kept in kernel space while macrokernel has more services in kernel space.

• Microkernel has a small kernel with minimal services while macrokernel has a large kernel with many services.

• In microkernel, most services run in user space while in macrokernel, most services run in kernel space.

• Microkernel is more secure and reliable while macrokernel is fa...read more

Argument is the actual value passed to a function, while parameter is a variable used to define a function.

• Parameter is a variable in the function declaration, while argument is the actual value passed to the function.

• Parameter is used to initialize the function's variables, while argument is used to pass values to the function.

• Example: function add(a, b) { return a + b; } add(2, 3); Here, a and b are parameters, while

Indexes in DBMS are used to improve the performance of database queries.

• Indexes are data structures that allow for faster retrieval of data from a database.

• They work by creating a separate structure that contains a subset of the data in the table, organized in a way that makes it faster to search.

• Indexes can be created on one or more columns in a table.

• Examples of indexes include primary keys, unique indexes, and clust...read more

Interface is a blueprint of a class while Abstract class is a partially implemented class.

• An interface can only have abstract methods while an abstract class can have both abstract and non-abstract methods.

• A class can implement multiple interfaces but can only inherit from one abstract class.

• Interfaces are used to achieve multiple inheritance while abstract classes are used to provide a common base for related classes.

• ...read more

Different topology refers to the arrangement of nodes in a network.

• Common topologies include bus, star, ring, mesh, and hybrid

• Bus topology connects all devices to a single cable

• Star topology connects all devices to a central hub

• Ring topology connects devices in a circular loop

• Mesh topology connects devices in a network where each device has a direct connection to every other device

• Hybrid topology is a combination of tw...read more

BUS topology is preferred for small networks while ring topology is preferred for larger networks.

• BUS topology is easier to install and maintain than ring topology.

• Ring topology is more fault-tolerant than BUS topology.

• BUS topology is suitable for small networks with few devices while ring topology is suitable for larger networks with many devices.

• Ring topology is more expensive than BUS topology.

• Examples of BUS topolo...read more

SDLC refers to the process of software development. Different models include Waterfall, Agile, Spiral, and V-Model.

• Waterfall model follows a linear sequential approach with distinct phases like planning, design, development, testing, and maintenance.

• Agile model emphasizes on iterative and incremental development with continuous feedback and collaboration between cross-functional teams.

• Spiral model combines the elements...read more

Two trains starting from equator in opposite directions will not collide. Which train will have more wear and tear first?

• The train moving towards the east will have more wear and tear due to the rotation of the earth

• The train moving towards the west will have less wear and tear due to the rotation of the earth

• Air resistance will also affect the wear and tear of the trains

• The train moving towards the east will face more...read more