ESE EE : Digital Electronics - National Champion Test for ESE & GATE EE Exams

Question 1

Statement (I) : ECL gate has the highest speed of operation.
Statement (II) : The transistor in ECL gate operate in active region.

Question 2

The integrated injection logic has higher density of integration than TTL because it

Question 3

For logic circuit shown, the required inouts A, B and C to make the output X = 1 are respectively.

Question 4

AND operation of (79)₁₀ and (-56)₁₀ results in

Question 5

Which of the following notations have two representations of zero?
1) 1's complement with radix of number being 2
2) 7's complement with radix of number being 8
3) 9's complement with radix of number being 10
4) 10's complement with radix of number being 10
Select the correct answer using the codes given below :

Question 6

Statement (I) : 2's complement arithmetic is preferred in digital computers.
Statement (II) : The hardware required to obtain the 2's complement of a number, is simple.

Question 7

The reduced state table of a sequential machine has 7 rows. What is the minimum number of flip-flops needed to implement the machine?

Question 8

A divide-by 6 counter is obtained using

Question 9

In how many different modes a universal shift register operates?

Question 10

Synchronous counters eliminate the delay problems encountered with asynchronous (ripple) counter because the

Question 11

Assertion (A): Stack is a group of memory locations in RAM used for temporary storage of data.
Reason (R): PUSH and POP instructions are used to send and retrieve data from stack.

Question 12

At the beginning of a fetch cycle the contents of the program counter are

Question 13

Program counter in a digital computer computer

Question 14

Following is a 16-bit register for 8085 microprocessor

Question 15

The first microprocessor to include virtual memory in the Intel microprocessor family is

Question 16

Consider the following statements:
1) Indirect addressing is not possible for I/O mapped I/O port addresses
2) Pointer cannot be used to access memory mapped I/O addresses
3) Fewer machine instructions can be used with I/O mapped I/O addressing as compared to memory mapped I/O addressing.
4) With an 8085 microprocessor one can access at the most 512 devices with unique addresses using I/O mapped I/O addressing
Which of the statements are correct?

Question 17

Given below are three types of converters:
1). Successive approximation type
2). Weighted resistor type
3). R-2 R ladder type
Which of these types are D to A converters?

Question 18

How many bits will a D/A converter use so that its full-scale output voltage is 5 V and its resolution is at the most 10 mV?

Question 19

Analog inputs are converted t digital outputs using op-amps as comparators. Assuming a 5-bit digital output, the number of comparators required would be

Question 20

A 10-bit DAC provides an analog output which has maximum value of 10.23 volts. Resolution of the DAC is.