Computer Science Practice (Interactive)

During the fetch-decode-execute cycle, which register holds the address of the next instruction to be fetched from memory?

A processor has a clock speed of 3.2 GHz. How many clock cycles occur in one second, and what is the time taken for one clock cycle?

Which function of an operating system manages the allocation of CPU time to different processes and ensures that each process receives a fair share of processing time?

What is the primary difference between system software and application software, and which of the following correctly classifies a disk defragmenter?

Given a table of students with columns (studentID, firstName, lastName, subject, teacherName, teacherEmail), which normal form does this table violate and what is the specific issue?

Which SQL statement correctly returns the first names of all students who scored above 70 in Mathematics, sorted by score in descending order?

What is the time complexity of binary search on a sorted array of n elements, and what precondition must be met for binary search to work correctly?

Which sorting algorithm has an average time complexity of O(n log n) but can degrade to O(n squared) in the worst case, and what causes this worst-case performance?

In the TCP/IP model, which layer is responsible for routing data packets between different networks, and which protocol operates at this layer?

Which network security measure encrypts data transmitted between a client and a web server, and what protocol is commonly used to establish this secure connection?