Which one of the following is not a characteristic of flash memory ?
- A.It is an ultraviolet erasable programmable ROM.
- B.It is an electrically erasable programmable ROM.
- C.It retains data without power.
- D.It is a non-volatile memory.
Correct answer
Explanation
The correct answer is A, It is an ultraviolet erasable programmable ROM. Flash memory is erased electrically, not by ultraviolet light, so this is not one of its features.
Flash memory is a type of EEPROM (electrically erasable programmable read-only memory) that can erase and rewrite whole blocks at a time, which makes it fast. It is used in pen drives, memory cards, SSDs and the firmware chips of phones and computers. The older EPROM chip had a small quartz window and was erased by shining ultraviolet light on it, which is a different technology.
B is a true feature: flash is a form of electrically erasable ROM. C is true: it keeps stored data even when the power is switched off. D is true: holding data without power is exactly what non-volatile means.
Exam tip: EPROM is erased by UV light, EEPROM and flash are erased electrically, and all of them are non-volatile.
Practice Questions
View allWhich one among the following is not a part of the SWAYAM programme?
- A.Video lectures
- B.Classroom lectures
- C.Online discussion forum for clearing doubts
- D.Specially prepared material that can be downloaded/printed
Show answer
SWAYAM is an online learning platform, so live classroom lectures are not one of its parts.
Read the full explanation →Which one among the following consists of a list of commands that is executed automatically as the computer system starts up ?
- A.COMMAND.COM
- B.AUTOEXEC.BAT
- C.CONFIG.SYS
- D.AUTOSTART.BAT
Show answer
It is the batch file that MS-DOS runs automatically, line by line, every time the computer starts. A batch file is a plain text file of DOS commands with the.BAT extension.
Read the full explanation →Which one among the following is NOT true about Standard Generalised Markup Language (SGML)?
- A.It is an international open standard
- B.It is dependent on a computer's hardware
- C.It is independent of a computer's operating system
- D.It defines document type
Show answer
SGML was designed to be independent of both hardware and software, so saying it depends on a computer's hardware is false.
Read the full explanation →Which one among the following tasks is NOT carried out by an operating system?
- A.To link a program with the subroutines it references
- B.To manage data transfer to and from peripherals
- C.To allocate memory for storing programs
- D.To provide a layered, user-friendly interface
Show answer
Joining a program to the library routines it calls is the job of a linker, a separate system utility, not of the operating system.
Read the full explanation →Which one among the following protocols works at application layer in a TCP/IP protocol suite?
- A.IP
- B.TCP
- C.TELNET
- D.Go-back-N
Show answer
TELNET is an application-layer protocol that lets a user log in to a remote computer and work on it through a text terminal.
Read the full explanation →