NACOS(2)

What is the primary purpose of an operating system?

• To enhance graphics performance

• The primary purpose of an operating system is to manage computer hardware and software resources.

• To provide internet connectivity

• To increase battery life

Define the term 'algorithm' in computer science.

• A type of hardware used in computers.

• A programming language used for web development.

• An algorithm is a step-by-step procedure for solving a problem or performing a task.

• A method for storing data in a database.

What is the time complexity of binary search?

• O(n log n)

• O(n)

• O(log n)

• O(1)

Explain the difference between a stack and a queue.

• A stack uses LIFO, while a queue uses FIFO.

• A stack allows random access, while a queue does not.

• Both stack and queue use LIFO for data management.

• A stack uses FIFO, while a queue uses LIFO.

What is the main function of a compiler?

• To optimize code for better performance.

• The main function of a compiler is to translate high-level code into machine code.

• To debug code for errors.

• To execute code directly without translation.

What does 'O(n^2)' signify in algorithm analysis?

• It signifies a linear time complexity in algorithm analysis.

• It signifies a constant time complexity in algorithm analysis.

• It signifies a quadratic time complexity in algorithm analysis.

• It signifies an exponential time complexity in algorithm analysis.

What is the purpose of a database management system (DBMS)?

• To manage user interface design

• The purpose of a DBMS is to manage and facilitate the storage, retrieval, and manipulation of data in databases.

• To perform complex mathematical calculations

• To create and design websites

What is the difference between a primary key and a foreign key?

• A primary key is always a string, while a foreign key is always an integer.

• A primary key can be null, while a foreign key cannot.

• A primary key is used for indexing, while a foreign key is used for sorting.

• A primary key uniquely identifies records in a table, while a foreign key links records between tables.

What is recursion in programming?

• Recursion is a method where a function runs in parallel with another function.

• Recursion is a technique that involves using loops to repeat a function.

• Recursion is a process where a function is executed only once.

• Recursion is a method where a function solves a problem by calling itself.

What is the role of a software engineer?

• To write user manuals for software products.

• The role of a software engineer is to design, develop, and maintain software applications.

• To manage hardware components of a computer.

• To oversee project budgets and timelines.