All Free Software Engineering MCQs with Answers

• A. cyclic redundancy check
• B. code repeat check
• C. code redundancy check
• D. cyclic repeat check

Explanation: CRC means Cyclic Redundancy Check, an error-detection method that calculates a check value for transmitted or stored data.

• A. a process is running on both devices
• B. a process in one device is able to exchange information with a process in another device
• C. PIDs of the processes running of different devices are same
• D. none of these

Explanation: Devices form a network when processes on them can exchange information, which captures the purpose of communication between connected…

• A. Black
• B. Input
• C. Output
• D. Word Processing

Explanation: A keyboard is an input device because it sends entered characters and commands to the computer.

• A. prices
• B. OCR
• C. scanners
• D. barcodes

Explanation: Barcodes are patterned lines that encode product information for optical scanners to read.

• A. Keyboard
• B. Scanner
• C. Printer
• D. Platter

Explanation: The keyboard is the standard device for entering both text and numerical data directly into a computer.

• A. Task bar
• B. Menu bar
• C. Desktop
• D. Start menu

Explanation: The clock and calendar are normally displayed in the notification area of the taskbar, usually at the lower-right corner of the desktop.

• A. CPU and Main Memory
• B. Hard Disk and Floppy Drive
• C. Main Memory and Storage
• D. Control Unit and ALU

Explanation: The processor’s two fundamental functional units are the Control Unit, which directs operations, and the ALU, which performs arithmetic…

• A. synchronization bytes
• B. addresses
• C. frame identifier
• D. all of these

Explanation: A frame header can carry synchronization information, source and destination addresses, and an identifier or control field used to…

• A. distributed database system
• B. a single server
• C. a single computer
• D. none of these

Explanation: DNS uses a distributed database system in which domain information is stored across many interconnected name servers rather than on one…

• A. Keyboard
• B. Monitor
• C. Joystick
• D. Microphone

Explanation: A monitor is an output device because it presents processed information to the user.

• A. the computer that originates the data
• B. the computer that routes the data
• C. the computer that terminates the data
• D. all of the above

Explanation: A network node is any connected device that can originate, forward, or terminate data, so all three descriptions apply.

• A. Shifter
• B. Upper case
• C. Caps lock key
• D. Icon

Explanation: Caps Lock activates uppercase typing without requiring the Shift key for every letter.

• A. Assembly language
• B. Machine language
• C. Apaghetti code
• D. Source code

Explanation: Early computers were programmed in machine language, using binary instructions directly understood by the processor.

• A. Function
• B. Spacebar
• C. Arrow
• D. Control

Explanation: The Control key is normally pressed with another key to invoke commands such as Ctrl+C or Ctrl+S.

• A. Because its function goes back and forth every time it is pressed
• B. Because it cannot be used for entering numbers
• C. Because it cannot be used to delete
• D. Because it cannot be used to insert

Explanation: Caps Lock is a toggle because each press changes it between two states, uppercase mode and normal typing mode.

• A. RAM
• B. Printer
• C. Monitor
• D. ROM

Explanation: The monitor displays visual output produced by the computer. RAM and ROM store data, while a printer produces output on paper.

• A. piggybacking
• B. cyclic redundancy check
• C. fletcher's checksum
• D. none of these

Explanation: Piggybacking attaches an acknowledgement to an outgoing data frame instead of sending a separate acknowledgement frame.

• A. Pictures
• B. Text
• C. Both picture and text
• D. Neither picture nor text

Explanation: A scanner converts both printed pictures and text into digital form. Text may later be made editable through OCR, while an ordinary scan…

• A. Dragging
• B. Dropping
• C. Right clicking
• D. Shift clicking

Explanation: Right-clicking an object opens its shortcut or context menu, which commonly includes Properties.

• A. special function cards
• B. RAM
• C. CPU
• D. Intel

Explanation: The CPU works directly with main memory to fetch instructions and data, process them, and store results.