Online Electronics and Communication Engineering Test - Microprocessors Test

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Total number of questions: 20.
Time allotted: 30 minutes.
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A computer program is used to read M and print the sum 2 + 4 + 6 + 8 +.........+ 2M. If M = 9 , the print out will show the number

100

[#]

Which of the following is not a key word in C?

pop

for

union

[#]

If F = 95.0 what will be the result of following FORTRAN 77 program?



REAL F , C
READ * , F
C = (5. / 9.) * (F - 32.)

35.0

25.0

[#]

Consider the following statements about an array in Pascal

An array has a fixed predetermined number of components.
Any component of an array can be accessed using an index.
An array variable name refers to a group of quantities by a single name.
When array variables are used an appropriate declaration is required.

Which of the above are correct?

All

1, 2, 3 only

2, 3, 4 only

1, 2 and 4 only

[#]

Consider the following expressions in Java

int a, b, c, 
a = 40;
b = a⁺⁺ ;
c = ⁺⁺a ;

Now the values of a, b, c are

42, 40, 42 respectively

42, 42, 42 respectively

40, 42, 42 respectively

40, 40, 42 respectively

[#]

The number of primitive string operations in 8086 is

[#]

The standard FORTRAN exponential form of decimal number - 0.000000023 is

2.3 E - 8

-2.3 E - 8

2.3 E - 7

-2.3 E - 7

[#]

Which of the following methods does not cause any reduction in instruction length?

Using program counter

Common source and destination address

Implicit source and destination address

Machine language programming

[#]

Assertion (A): In C arithmetic operations are pemiissible on ints, floats and chars.

Reason (R): In C every arithmetic operator must be written explicitly.

Both A and R are correct and R is correct explanation of A

Both A and R are correct but R is not correct explanation of A

A is correct R is wrong

A is wrong R is correct

[#]

10.

The initial contents of ACC and CY in 8085 are

CY = 1
ACC = 10000001

After instruction RAL is executed once the contents of CY and ACC respectively will be

1 and 00000011

0 and 00000011

1 and 00000001

0 and 00000001

[#]

11.

The word size accessible at a time from the memory subsystem depends on

width of data bus

width of address bus

width of control bus

both (b) and (c)

[#]

12.

Assertion (A): In microprocessor 8085 instruction LXIB, 90 FF H means register B and C are loaded with upper and lower bytes to get B = 90 H and C = FFH.

Reason (R): In 8085 the stack pointer indicates which memory location is to accessed.

Both A and R are correct and R is correct explanation of A

Both A and R are correct but R is not correct explanation of A

A is correct R is wrong

A is wrong R is correct

[#]

13.

A PC has typically

5 to 10 KB of main memory

10 to 100 KB of main memory

100 to 256 KB of main memory

256 KB to 1 MB of main memory

[#]

14.

8085 data bus has 8 lines and is bidirectional.

True

False

[#]

15.

RAM is a volatile memory device.

True

False

[#]

16.

Which memory has read operation, byte erase, byte write and chip erase?

RAM

UVEPROM

EEPROM

both (b) and (c)

[#]

17.

The use of microprocessor control in automobiles results in

improved fuel economy

improved car control

advanced information system for driver

all of the above

[#]

18.

Read the following statement

Multi-processing operation permits highly efficient parallel processing at several levels.
Multi processing involves use of several processing units jointly on a common program and severally on different programs.
In multi-processing the assignment of facilities to tasks, loading of programs and monitoring of I/O activity is taken care of by operating system.

Which of the above are correct?

All

1 and 2 only

1 and 3 only

2 and 3 only

[#]

19.

Assertion (A): Structures are useful in DBMS.

Reason (R): Structures are very large numbers of applications besides DBMS.

Both A and R are correct and R is correct explanation of A

Both A and R are correct but R is not correct explanation of A

A is correct R is wrong

A is wrong R is correct

[#]

20.

In a typical microcomputer data transfer takes place between

μP and memory

μP and I/O devices

memory and I/O devices

all of the above

[#]

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Online Electronics and Communication Engineering Test - Microprocessors Test

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