NIIT Computer Operator and Clerk Interview Questions and Answers

I am proficient in programming languages such as Java, Python, and SQL.

• Java

• Python

• SQL

An operating system is a software that manages computer hardware and provides services for computer programs.

• Manages computer hardware resources such as memory, CPU, and storage

• Provides a user interface for interacting with the computer

• Supports running applications and managing processes

• Examples include Windows, macOS, Linux, and Android

SDLC is a process used by software development teams to design, develop, and test high-quality software.

• SDLC is a structured process that divides software development into distinct phases.

• Common phases include planning, analysis, design, implementation, testing, and maintenance.

• Each phase has specific goals and deliverables to ensure the quality and success of the software.

• Examples of SDLC models include Waterfall, Agi

An array in programming is a data structure that stores a collection of elements of the same type in a contiguous block of memory.

• Arrays are used to store multiple values under a single variable name.

• Elements in an array are accessed by their index, starting from 0.

• Example: string[] names = {"Alice", "Bob", "Charlie"};

An interface in programming defines a set of methods that a class must implement.

• An interface acts as a contract between a class and the outside world.

• It specifies what methods a class must have, but does not provide the implementation.

• Classes can implement multiple interfaces in Java.

• Example: 'Runnable' interface in Java requires implementing the 'run' method.

DOS stands for Disk Operating System. It is a command-line interface used to manage files and run programs on older computers.

• DOS was the primary operating system used on IBM-compatible personal computers in the 1980s and early 1990s.

• It uses a command-line interface, which means users must type commands to perform tasks.

• DOS commands are case-insensitive and can be abbreviated to save time.

• Examples of DOS commands inclu...read more