Digital Circuit and Microprocessor MCQs

Question 1

The greatest negative number which can be stored in computer that has 8-bit word length and uses 2's complement arithmetic is

Accepted Answer

?l28

Answer

?256

Answer

?255

Answer

?127

Question 2

Match List-I (computer terms) with List-II (definitions) and select the correct answer using the codes given below the lists :List-I A. Interface1. A measure of rate of data dansmission ,B. A bit 2. A binary digit,C. Baud Speed 3. The common boundary between various sections and subsections 4. Analog to digital converter Codes :

Accepted Answer

3,2,1

Answer

3,1,2

Answer

2,4,1

Answer

4,2,3

Question 3

Storage of 1 kB means which of the following number of bytes?

Accepted Answer

1024

Answer

1000

Answer

964

Answer

1064

Question 4

Which of the following is a Correct definition of volatile memory?

Accepted Answer

Its contents are lost on failure of power supply

Answer

It loses its cntents at high ambient temperatures

Answer

It has to be kept in air-tight boxes always

Answer

It isthe latest type of bubble memory

Question 5

Which of the following descriptions relates to a floppy diskette?

Accepted Answer

double-sized double density

Answer

9-track 1600 BPI

Answer

33 MHz-zero-wait time

Answer

40 MB capacity

Question 6

Which of the following is NOT correct?

Accepted Answer

A memory location can hold only a data item and not a program instruction

Answer

A memory loacation is identified by a unique number called its address

Answer

The content of a memory location does not change its address

Answer

Entering data into a memory location does not change its address

Question 7

Which of the following is an example of volatile memory?

Accepted Answer

RAM

Answer

ROM

Answer

PROM

Answer

HARD DISK

Question 8

Which of the following does not represent an I/O device?

Accepted Answer

ALU

Answer

Speaker which beeps

Answer

Joystick

Answer

Plotter

Question 9

A storage medium which cannot support both direct-access and sequential access application is

Accepted Answer

magnetic tape

Answer

magnetic drup

Answer

hard disk

Answer

floppy disk