Electronics and Communication Engineering - Microprocessors

36. 

In ALU 1C 74181 the addition and subtraction is in

A. 2's complement
B. 1's complement
C. binary
D. none of the above

Answer: Option A

Explanation:

2's complement is universally used in computers.


37. 

While selecting a memory chip the feature which should be examined is

A. capacity
B. ac characteristics
C. dc characteristics
D. all of the above

Answer: Option D

Explanation:

All these characteristics are important.


38. 

EEPROM permits

A. read operation only
B. read and byte erase operations
C. read, byte erase and byte write operations
D. read, byte erase, byte write and chip erase operations

Answer: Option D

Explanation:

All the four are permitted.


39. 

Which is not a valid Java variable

A. lot
B. c 1t
C. s $ 2
D. 2 s $

Answer: Option D

Explanation:

The first letter of variable name should be lower case.


40. 

Which of the following is invalid in Basic?

A. A ** B + - C
B. A ** B - C
C. A * B - C
D. A * B - C ** D

Answer: Option A

Explanation:

Two operators cannot exist together.