Electronics and Communication Engineering - Microprocessors

41. 

Which of the following is operating system?

A. MS WORD
B. Ventura
C. Java
D. Windows

Answer: Option D

Explanation:

Windows is an operating system.


42. 

A modem is connected to PC at

A. serial port
B. parallel port
C. SCSI port
D. input port

Answer: Option A

Explanation:

Modem is connected at serial port.


43. 

Assertion (A): The data bus and address bus of 8085 are multiplexed.

Reason (R): Multiplexing reduces the number of pins.

A. Both A and R are correct and R is correct explanation of A
B. Both A and R are correct but R is not correct explanation of A
C. A is correct R is wrong
D. A is wrong R is correct

Answer: Option A

Explanation:

In 8085 signal lines AD7 - AD0 are used for address bits in some T states and for data in some other T states.


44. 

Consider the following statements about 'Functions' in C

  1. A function can be called any number of times.
  2. A function gets called when the function name is followed by a semicolon.
  3. The order in which functions are defined in a program and the order in which they are called must be the same.
Which of the above statements are correct?

A. All
B. 1 and 2 only
C. 1 and 3 only
D. 2 and 3 only

Answer: Option B

Explanation:

The two orders need not be the same in C.


45. 

A failure rate of 0.01 percent in 1000 hours in a memory corresponds to an MTBF of

A. 1000 hours
B. 100000 hours
C. 10 hours
D. 100 hours

Answer: Option B

Explanation:

.