Hourly Challenge · Computer Knowledge
🕐 31 Oct 2026 · 9 PM IST
5 questions · 20 seconds each · instant explanations. For PSC, UPSC, SSC, Banking & Railway aspirants. No login needed.
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Question 1 / 5Score: 0
Which of the following is NOT an input device?
Explanation: A monitor displays information from the computer, so it is an output device. Keyboard, mouse and scanner all send data into the computer.
Question 2 / 5Score: 0
In the binary system used by computers, 1 kilobyte (KB) is equal to how many bytes?
Explanation: 1 KB = 2^10 = 1024 bytes in the binary convention used in most exams. Likewise 1 MB = 1024 KB.
Question 3 / 5Score: 0
Which keyboard shortcut is used to undo the last action in Windows?
Explanation: Ctrl + Z undoes the last action. Ctrl + Y redoes it, Ctrl + X cuts and Ctrl + U underlines text in most editors.
Question 4 / 5Score: 0
What is the full form of URL?
Explanation: URL stands for Uniform Resource Locator, the address used to find a resource such as a web page on the internet.
Question 5 / 5Score: 0
Which type of computer memory loses its data when the power is switched off?
Explanation: RAM (Random Access Memory) is volatile, so its contents are lost when power is off. ROM, hard disks and SSDs are non-volatile and keep data.
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